If you are planning to build a treehouse and baffled where to start then this is a must-read guide for you. With my years of experience and extensive research, we have prepared this in-depth guide on building a treehouse. Here you will learn how to build a treehouse scratch which included designing treehouse, choosing the right tree, creating solid foundations, a list of hardware materials, accessories, tools required.
Process To Build Treehouse Step By Step Guide
We agree there is a lot to learn and consider in order to build a treehouse. But if you divide the building process into small doable steps, suddenly a mountain looks like a tiny boulder. That’s what we have done. We have divided the complete process into eight phases. Each phase is further divided into actionable steps.
Here is the overview of the entire process to build a treehouse:
- Phase 0: Preparation
- Phase 1: Foundation
- Phase 2: Floor
- Phase 3: Walls
- Phase 4: Roof
- Phase 5: Finishing Up
- Phase 6: Grand Opening
- Phase 7: Future Upgrades
- Tools You Need
Now you know what you will have to do in order to manifest your dream house. If you are ready, let’s just dive into the journey.
Phase 0: Preparation
This phase is aptly named, “preparation” because there is a lot to do before you nail a piece of wood to the tree. It’s just like taking theoretical lessons before you can do practicals. What this does is saves you from wasting money, resources, and time. Also, consider the fact, you might have only one tree that is suitable for a treehouse.
If anything goes wrong, there is no way you will be able to replace the tree. So the preparation phase is a must.
The preparation phase is all about gathering as much information as possible. You should know why you need the treehouse, the basics for building a treehouse, laws in your state to build a treehouse, what kind of tree is good for such construction and finally designing a unit that fits your needs. We have tried to answer almost all questions in this phase so that once you are in construction phases you are ready to implement it.
Here are all the things you must do before you build a tree-house:
1. Objective Of The Treehouse
Treehouse is a space that is used for various activities. Right from the start, you must consider the objective behind building a treehouse. Your objective will decide the design of the treehouse, and features you will include in your treehouse.
The most common use of the treehouse is to provide kids a place to have fun. When you are making a treehouse for kids the way it should be designed and built is totally different compared to making a treehouse for adults. You want to design a space where kids can hang out and play some games. Probably you want to give it more a fun vibe like adding some miniature furniture, a slide, etc. This is just one example. You can even build a treehouse for adults who like hunting, camping, fishing, or even use it as an office. Each activity requires a different design treehouse.
Hence, before going into the design and development of a treehouse it would be best to spend some time and understand how you will be using the treehouse. Figure out what kind of activities will be done on the treehouse. Also, understand how many people you want to accommodate in that treehouse.
If you want to begin your journey as a proud owner of a treehouse, the best place to start books. There are hundreds of books written about treehouses. If you are completely new to treehouse building, reading reliable books will give you a lot of information. This is how we learned as well. We referred to a lot of books to build our knowledge as well as get ideas for our projects.
Some of the books became the core foundation of what we know today. One author that has really influenced us is Pete Nelson. He has been the author of many books on treehouses. His book Home Tree Home: Principles of Treehouse Construction and Other Tall Tales is popular among treehouse enthusiasts. He has been treehouse enthusiasts from age five. You can just imagine the amount of experience he has.
Just like him, there are many authors who have written some quality books on building treehouses. Just read what these experts are saying. If you don’t know where to begin, here is our post on the best books on building a house.
3. Treehouse Regulations
You might say it’s your land you can build whatever you like. Well, you are allowed to build a treehouse, just there are few regulations that you need to take care to build a treehouse. All properties have some kind of legal restriction on structures that can be built on it. These restrictions are different for all regions, cities, states, and countries.
A treehouse is a place that creates lots of memories for kids and adults. You might have experience of playing in one when you were old and probably now you want the same experience for your kids or even for yourself. But you do not know how to build a treehouse? Or you think you cannot build your own treehouse. Believe us, if you put your mind and soul into it, you can have your own treehouse.
Usually, these regulations are made to protect the sentiments and the privacy of the local community. If you look at the core structure of the treehouse, it is built at a height. This height could be an issue if it is in a tight neighborhood. It can block somebody’s view or you can see inside somebody’s house which is a violation of privacy.
Don’t worry too much about it. All you need to do is go to the local authority and tell them you are planning to build a treehouse. Get their suggestion. Know if it is within their regulation or violating any norms.
4. Selecting The Tree For Treehouse
A lot of people make the mistake of designing the treehouse first and then looking for a suitable tree. You are not going to find the perfect tree for your dream treehouse but you can build a perfect treehouse on the tree you have. So do not begin designing unless and until you have the right tree.
While looking for a tree for your treehouse there are several things you have to consider. But first, look at the kind of tree you can use. The oaks and maple trees are one of the best trees to build a treehouse. They have strong and thick branches that are perfect for supporting your treehouse. However, there are many other trees that you can use.
Here is a complete list of suitable trees for treehouse:
- Douglas Fir
Once you have selected the right tree, you have to check if it is right for your requirements. We will cover the selection process in detail. But for now, let us just tell you the short version. You need trees that have thick branches. It should have the right height for a treehouse. To be precise, not too low and not too high. And most importantly, it must be healthy and growing.
For more details on selecting the right tree for a treehouse, you can check out our article.
5. Creating Design For Treehouse
This is the most crucial step in building a treehouse. Right at this step, you will be able to see how your dream treehouse would look. If you are able to design and note down very small details, your job is half done. The rest of the process automatically follows because you have all the measurements, you know where to cut and what to attach. Every small detail is decided in the design process.
There is one important step before you start drawing the treehouse. You have to take all the necessary measurements of the tree. You will have to imagine how a treehouse would fit in those measurements. When you have some idea about it, you can draw a rough sketch. Finally based on that rough sketch, draw a few more sketches of different parts of the treehouse-like floor plans, elevations, roof, etc. One key tip is to draw the sketch of the treehouse with the tree. We like to take pictures of the tree, print it out on a sheet and draw the house on that. This allows us to exactly understand which branch goes where and where will be all the attachment points.
Once you have the bunch of drawings ready, it’s time to see how your treehouse would look in 3D. For that, you can use 3D-model software like Photogrammetry, etc. At this stage, you can hire a professional architect to help you with the design. He has all the necessary tools for designing.
The next step is optional and depends on the regulation in your area. If you require any kind of permission before construction, you might probably need the help of a recognized architect and engineer to build a complete plan of construction. This plan will be presented to the appropriate authority for obtaining the permit. However, this happens in very specific cases. If you plan to build a treehouse on a property which is not so densely populated like a farm or private property, you can skip it.
This is just an overview, you can see the complete step by step process for designing a treehouse. We have covered everything about the designing process which includes floor plans, roof plans, shop drawings, and many more.
Phase 1: Foundation
Once you have the designs in your hand, it’s time to grab your hammer and nails, start building your dream treehouse. If you have made designs with all details, you might have also thought about the foundation of a treehouse. Just like the foundation of a building, the treehouse too needs a strong foundation. The foundation includes steps like preparing the tree, ensuring the growth of the trees, type of supports, lifting mechanism, fixtures, fasteners, frame, etc.
Let’s look at each step to build a treehouse foundation:
1. Keep the Tree alive
Even if you build a long-lasting and sturdy treehouse, it wouldn’t last a year, if the tree is dead. You want the tree to be alive. You do not want to stunt the growth of the tree by any means. Because if you stop the growth of the tree, it would die and as the dead tree ages, termites and other infestations spoil the wood. A spoiled wood is structurally weak from within. Even the roots are weak and they don’t hold the ground as strongly as the live tree would.
Hence while designing or building treehouse make sure you leave a room for the branches and trunk to grow. Keep cutting and chopping to the bare minimum.
2. Support Systems
The support system will be the base of your platform. You can say the weight of the whole structure would depend on the support system. There are various ways to support a treehouse but generally there only types of support system:
- Rigid Framework
- Flexible Framework
Trees are moving and growing, hence you want a support system that is flexible. However, the type of system you use completely depends on the size of the trees and the number of trees used for the treehouse. The simple principle used by many treehouse builders is to use a minimum number of joints.
If you are using two trees, you will need at least two joints, and if three then the number increases to three. Since the joints are directly attached to the growing tree, you need to consider the movement of the joint as well. If too many joints are changing the position, it would be hard on the structure of the three houses.
It is a complex topic but for now, just keep in mind to use as few joints as possible to keep the support system flexible. For detail, you can check out our article on building support systems for treehouses.
3. Fixtures and Fastening Attachments
In order to attach a treehouse to a tree, you will need four main things:
- Treehouse Attachment Bolts (TABs)
Since houses are built on a growing tree, these attachments will experience a lot of stress from the weight and the wind. You want them to be of the highest quality in order to sustain such high strain over a long period.
You must use galvanized bolts as they have much better strength and durability. Out of four TABs or treehouse attachment bolts are the most important of them.
They are large bolts with coarse threads that can sustain a load of almost 2000 lbs. Also, you can attach other accessories like knee brace brackets to the TABs. If you are planning to build a treehouse there are no other bolts for attaching heavy loads to the tree.
4. Creating The Frame For The Treehouse
At this stage, you should have all the plans and designs in your hand. You will have to make frames for things like floor, walls, windows, roof, and many more. This is pretty much the same as you would do with any wooden house. The first step is to create a frame for the platform which will act as your construction site. This frame will be supported by your support systems or mounts. The frame for the platform will be usually in the shape of a floor. It can be square, triangle, hexagonal, or octagonal.
Make sure you build the frame on the ground. In fact try to build everything on the ground and then assemble it over the platform. The reason being you will have much more space to work, all the woodworking tools are easily accessible and all the necessary raw material will also be on the ground.
Try to find which part of the treehouse would need a frame. Usually walls, floors, railings and windows would need a frame. Since all the freshness would need a similar kind of cutting and carving, finish everything in one go. When you assemble all the frames, you will have the skeleton of the treehouse.
If you want to know more about how to create frames and what you need for frames, you can check out our detailed post on how to build frames for the treehouse.
Phase 2: Floor
Once you are ready with a frame and support system, it’s time to nail down the floor. Up until now if you did everything right, you won’t face many issues from here on. Still, to be safe check if the support structure is in place, braces are done, and the platform is done.
If you tick all boxes, start laying down the main floor. For the main floor you can use any decking if you have purchased any else any wood sheet will do.
1. Choosing The Material For Floor
Best material for the floor would be any hardwood boards. Make sure they have 1″ thickness. They do provide space for ventilation but not a suitable option if your expecting movement of the tree. For that you need something flexible like plywood. It can handle twisting caused by the growing tree in a much better way. However, plywood won’t be a great idea if you are building the treehouse for kids. It is not easy to clean if it is exposed to any kind of liquid. Also, it does get spoiled if exposed to water for a long period.
There are few more material for the treehouse, but it completely depends on the way you want to use the treehouse.
2. Designing The Floor
While doing the flooring you should also make sure the floor allows the treehouse to breathe. If there is a tiny gap between the boards it would allow ventilation to keep the treehouse cool and also if there is any kind of spill, you can clean it easily. One more thing to keep in mind is you would have an account for the branches and trunk that might go through the flooring.
Here you can see how the floor has been cut to allow the branches to grow. This not only allows the tree to grow but also adds to the aesthetics of the treehouse.
3. Building The Floor
Once you have the material and design in your hand, you can start the building process. Use good quality access to attach the boards to the frame. Make sure to leave little room between the two boards to make sure flow. If you have kept the joists 12″ apart while building the frame, entire boards will fit well. Flooring can be done in no time if you have designed the frame well and also accounted for the type of flooring material.
Phase 3: Walls
Once you have completed the floor, now you can build the rest of those with ease because now you have a place to stand on. The next phase is to build walls of the treehouse. Before you go for further make sure you have attached the frame of the wall to the structure.
1. Choosing The Right Material For The Walls
Most popular material for the treehouse is wood. You can use regular wood or ply. Most parts of America and Canada Shingles are highly popular. These are nothing but panels of straight grain wood like cedar. Anything made from cedar and cypress wood would be a great material for exterior because it is naturally rot-resistant. For interior which is less prone to the harshness of weather, you can fit cherry or walnut hardwood. They not only look good but works well if you plan to install something on the wall.
2. Designing the Walls
If you have already designed and attached the frame to the treehouse structure, you might have already taken care of most of the Things. However, still while laying the boards on the wall frame, you have to make sure that you know where the tree branches go through the wall. You can cut out those portions leaving enough room for the branches to grow as well as move.
Just like you do while building a house on soil, you should know what is the direction of the wind in your area. So that you can plan out the windows for proper cross ventilation. You don’t have to build windows as of now, just leave the room for the windows and doors.
You might probably want to install some electrical appliances like fans or air conditioning. So while designing you must account for the electrical wiring and the location of the switchboard as well as the appliance. Just plan out how you will run wires from switchboard to the appliance and from where you will provide the supply.
3. Building The Walls
Once you know where the windows, and doors go. You can start laying down the wires if you want electricity in your treehouse. Otherwise straight away start nailing the wood boards or any material that you have chosen. Make sure you are laying the boards on each other creating a kind of runoff for the rainwater. For this process, all you need is good quality nails and a nail gun.
4. Leaving Space For The Tree To Grow
We have already mentioned that you must leave out the space for the branches and trunks to grow while designing the wall. You can cut the chunk of the wood for the branches. It should be big enough to allow the movement of the branch in the wind and also allows the branch to grow big with time. If you don’t leave enough room, with time the branch will grow big and rub against the treehouse. Thus causing a threat to the structure of the house.
Phase 4: Roof
Once you have the flooring and walls, it’s time to put a roof on your treehouse. It saves you from light, rain and the wind. You might have already made some kind of frame for the roof using the joists and rafters. Unlike walls and floors, roofs must be in triangle shape so that rain or snow can runoff. After you have the right frame you can follow these steps.
1. Materials For The Roof
Unlike walls and floors, there are a lot of options for roofs. In addition to the traditional plywood, you can use tarp, metal and even ceramic roof tiles is a great option. All have their own advantages and disadvantages. Traditional plywood is the most popular choice. You can also use any reclaimed wood that you own for the roof. Just shape them into thin sheets of wood and lay them on the roof frame. This type of room has great durability and lasts even against the strong wind.
Some of the treehouse owners like having an open roof for summer and winter. It’s only during the rainy season, it might need some covering. In such cases, tarp is a great option. It is very easy to deploy and easy to remove because you just tie them to a permanent frame. Though tarp will provide protection against the wind, it might not last against the strong winds.
Another option is to use metal roofs. They are durable and can handle the constant twisting of the tree. However, it might not be a good option if you are located in a region that is prone to tornadoes or strong winds.
2. Building The Roof
Once you have the roof material, it is time to assemble it over the roof frame. Make sure while adding joists and rafters to the frame you account for the size of the panel of the roof material. If you are using traditional wood sheets, nailing them to the frame is the best option. And if you are using a metal roof, you will probably have to use the nut and bolts along with the brackets at the attachment points. In case you want a temporary roof like a tarp, you will have to include hooks where you can tie the tarp.
Phase 5: Finishing Up
Your treehouse is almost ready, just there are a few things that you need to finish. These are some essential elements of your treehouse. They not only add beauty to your treehouse but also add safety. These array of essential elements include entrance to your treehouse, doors, windows, railings, and paint.
Let’s look at each element one by one:
1. Building The Entrance To Your Treehouse
Probably you might have decided how you are going to reach your treehouse. Depending on the height of the treehouse, you can use different types of stairs or ladder. These are one of the most popular ways of the entrance to the treehouse. Especially, when you are building a treehouse for the kids it is the safest option.
You can simply build a ladder if the height is not too much. This ladder can either open into the treehouse through the floor or if you have left room on the deck, it can lead to the main door of the treehouse. If you have too much height, a proper staircase with railings would be a much safer option. We have also seen some treehouses with circular staircases around the trunk. But this is done only when the height of the treehouse is really high.
We have covered in detail about building stairs for the treehouse if you are specifically looking for building stairs or ladders.
2. Building the railings
When you are building the deck for the treehouse, you will have to add railings at its border. Especially if you are planning a little open place at the treehouse, an open place has to have railing for your safety. You can use the same wood for the railings that you used for the frames. And if you have little budget, you can even add a metal railing. It not only looks good, but it makes the railing sturdy and durable. Always look at the places that would need a railing. Decking and the stairs are the two places you would need 2.5 to 3 ft railings.
3. Building the Doors
Treehouse would need a door but depending on the size of the house, the shape and size of the doors to change. Even the location of the door too is different. If you cannot add a conventional door in front, you can build a mini door within the floor. If you have proper 8-10 ft walls, you can add a conventional door that connects the deck to the inside of the treehouse
As far as the material of the door is concerned, you can use any wood you have for the door. Even if you are planning to buy a ready-made door, make sure it is made of wood or plywood. The wooden doors are lighter and also provide aesthetic value to your cabin.
For a treehouse door, a lock mechanism could also be a crucial factor. If you are making the treehouse for kids, a simple lath would do. But if you are building for adults, a proper lock with a key would be the best option. So that you can lock when not using it.
4. Building Windows
Windows are important for any structure. They not only allow light but also help create cross ventilation. For a treehouse, you need to have at least two windows on opposite walls. Also, you have to consider which side of your house receives the maximum light and breeze.
For a treehouse you do not need a fancy window, a simple wooden window will do the job. If you live in an area where the weather is mostly chilly, you can use a glass window. It will break the chilly winds and allow only the warm sunlight. You can even add large windows like a floor to ceiling window if your treehouse is exposed to some great view.
5. Painting the Treehouse
If you want to make your treehouse look good, a paint job would really improve the beauty of it. You can use the regular exterior paints that you use for the wood houses. Any acrylic based paints would be perfect for it. They last longer as well as make it a little waterproof as well. You can even go with oil paints but they take a little bit of time to cure compared to water-based paints like acrylic. Also, they do not do well with harsh climates.
This is one of the few examples of how you can make your simple treehouse look good as well as protect it.
Phase 6: Grand Opening
Construction is over, it’s time to enjoy your treehouse. Let’s also talk about the activities you can do in your treehouse. And there is a lot you can do in your treehouse. You can plan kids’ birthday parties, adults can hang out, do special dinners, sleepovers, and many more. But you must know it is a treehouse, hence there is a limit and the way you plan for the parties is also different compared to what you do at your house.
1. Planning Treehouse Parties
When palling parties at the treehouse you must know the load capacity of your treehouse. Even if you have built the safest treehouse in the world, you should not accommodate more people than it is built for. If it is built for 6-8 kids, invite-only 6-8 kids and the same goes for the adults. If you have no idea about the load capacity any structural engineer can help you with that.
Also, make sure you know the other limitations of your treehouse. If your treehouse does not have fire safety measures, make sure to avoid having any kind of fire in the treehouse. If your treehouse cannot handle any kind of liquid, avoid having a cocktail party. It is all about knowing the limitations and strengths of your treehouse.
2. Decorating the Treehouse
You might be thinking about pretty decoration lights and figurines but there is a lot you can do with a treehouse. Especially when you have a treehouse for kids, you can add a lot of things like toys, miniature furniture, cool gadgets, etc.
If the treehouse is in your backyard, you can add little miniature furniture for the kids. And if it is located in some kind of woods, you can add cool gadgets like deck binoculars withstand for bird watching, etc.
If you as an adult are planning a sleepover on your treehouse, you can use different kinds of lighting options and also make place for cool board games. Couples can decorate the treehouse for romantic dates etc. Decorating the treehouse completely depends on the occasion.
3. Dining at the Treehouse
Dining is something that you can do at almost any treehouse. If you have large enough space, you can even add a small dining table. However, make sure you cook your food on the ground because cooking inside the treehouse is a completely different challenge.
Even while dining at the treehouse make sure you have thought about how to tackle spillage or cleaning. If you have some experience with wood flooring, you should know wood is a hard material to maintain. The stains are hard to remove. It would be wise to use any kind of covering or use dish mates while dining.
Phase 7: Future Upgrades
Once you have built the treehouse you can keep upgrading it as you do with your house. And trust us there is a lot you can upgrade at your treehouse. It completely depends on the way you want to use the treehouse. Here are some situations we have assumed to give you some idea about the upgrades.
1. Playing At The Treehouse
Treehouse is something most of the kids associate with. Even the adults say that they have very fond memories of playing at some or other treehouse. If you are making a treehouse specifically for your kids, there is a lot you can do for the entertainment of the kids. You can not only add toys but add activity based equipment at the treehouse.
When you think about your kids playing at the treehouse, it includes the area around the treehouse. So plan out activities that they can do around the treehouse.
Usually, the area beneath the treehouse is empty, you can use it for swings or climb nets that kids can use to reach the treehouse. You can even add a slide from the treehouse. Here is one example of a treehouse with a slide.
And if you want them to play inside the treehouse, you can add small telescopes or binoculars on deck. You can even add toy cannons for them to shoot from the deck. You even create storage for the different board games to play inside the treehouse.
What adds depends on the age of your kids and the design of the treehouse but makes the safety of your kids your first priority. Even if you think a toy or structure may cause 10 percent of threat, just avoid.
2. Making It An Office
Who says a treehouse is only for kids? Even adults can enjoy the treehouse. A big corporation like Microsoft has built treehouse offices for their employees. That means even they consider treehouses as great places for work. If you like working from home, treehouses provide perfect ingredients for the office. It would be an office with very little distraction and very good views. All you need is a desk and a chair with the thing you work on. If you mostly work on a computer, just use a laptop because it is much smaller compared to a desktop. You can use Wi-Fi for the internet.
2. Sleeping At The Treehouse
Treehouse is the place where you can get the best sleep of your life. It is not just a mere statement, even science would agree. You might have seen white noise apps and videos going around to help people sleep. Well, a treehouse is a place that is full of white noise. You can hear the wind blowing, leaves rustling, and if you have a river nearby it would add to the tranquility of the place.
There are a lot of benefits of sleeping at the treehouse, but it is also exposed to the weather. And of course, creepy living things that you would hate to sleep with like ants, bugs, mosquitoes, etc. So you will have to make proper arrangements of fighting these adversities before sleeping at the treehouse. The best bet is to use bug sprays and even sleeping nets to keep them away.
3. Cooking At The Treehouse
We know many would love to just live in a treehouse for their entire life. This means doing everything on the treehouse including cooking. Cooking means having a fire in the treehouse and fires are the worst enemy of the wood. Don’t get disheartened, there is a way you can cook in a treehouse. You can use electrical stoves to cook. It is a fire-free method of cooking. However, this is suitable for only small treehouses.
In case you have a treehouse that is large enough to accommodate a full-fledged kitchen, you can just fireproof the walls and add the chimney to make sure the heat is thrown out immediately. There are many treehouse hotels around the world, they do offer kitchen in the treehouse. But the key is having large space and material used for the kitchen does not allow any kind of fire to spread.
Important Tools You Need To Build a Treehouse
In order to build a treehouse you need a lot of things but there are few tools that would have to be on hand right till the end of the construction. We have created a list of such important tools to help you be prepared before you begin the construction.
You will need a high-quality drill to create different kinds of holes while building a treehouse. Make sure to have different types of drill bits because the size of the holes may vary over the course of the construction. Also, you would need both heavy-duty as well as cordless light drills. We will create a separate article about selecting the drills for building treehouses.
Since you would be using a lot of wood, you should get a good quality electric saw to help you cut wood. A single good quality saw would be enough. However, keep extra blades in reserve for emergencies. As for the type of the saw, you can go for the circular saw and if you know you would need something for fine woodwork you can buy a hand or jigsaw.
In case you are repurposing some wood or using wood from newly cut trees, you would need to use the grinder to make the wood smooth. Especially for the woods that would be used in the interior of the treehouse.
A couple of saw horses would also be useful while cutting and grinding the wood. There are plenty of sawhorses but we recommend you to buy the simple ones if your project is small and wouldn’t be dealing with any complicated cutting. However, you can also go for the ones that come with multifunctional sawhorses.
5. Nail Gun
Another important piece of tool required for building the treehouse would be a nail gun. Well, you can use a traditional hammer but if you want to speed up your building process, a nail gun is a way to do it. We recommend you to go with cordless nail guns because you will be using the nail while working right on the treehouse platform. You do not need any wires while you are hanging at a height of 10-20 feet.
6. Climbing Gear
Speaking of hanging at height, you will have to get a climbing gear. Especially if you know your treehouse will be at a height of more than 8-10 ft it is wise to get some climbing gear. The climbing gear needs to include a quality rope, harness, quality carabiner and if required get an ascender too. You want to arrange the gear in such a way that both hands are free for work.
7. Pulley System
A pulley system is a useful tool to have for lifting materials to height. And while working on a treehouse you would need an efficient system to supply material from the ground. Just get a system that is easy to install on a tree and can take up the load of the different materials.
We have mentioned just six of the tools but there is plenty more hardware that you would need while building a treehouse. We will cover the entire hardware requirement in a separate post so that we can cover it in detail.
In this post, we have tried to accommodate everything to answer the question of how to build a treehouse. By reading our elaborate guide, you will understand the process to build a treehouse. You will also understand what you need while building a treehouse with bridge. As you get involved in the building process you learn more and more. You should check out our other articles to talks about each phase and steps in detail.