Free treehouse plans ยท 9 designs
Free treehouse plans. No tree needed.
Nine freestanding designs on posts, from a 2 ft 6 in deck for little ones to a 10x12 fort 6 ft up. Each one is drawn in 3D, checked and priced line by line.
- Designing
- Free
- Builder's plan
- $29 once
- Account
- Not needed
Find the plan that fits your yard
What are you building?
Deck height, up to
It shows the largest starting plan at or under the deck height you pick. The designer takes any deck from 2 to 12 ft and rechecks the guard, the gaps, the posts and the way up as you change it. It does not check your soil or your local rules.
Drawn by the designerThe largest of 2 plans up to 60 in
Open tree fort
Open tree fort: a 5 ft deck on 4 posts with rung ladder, no walls and no roof.
- Deck
- 5 ft
- Posts
- 4 x 6x6
- Footprint
- 64 sq ft
About $2,898 in materials, before sales tax, delivery, labor and site work, $1,120 of it the required safety surfacing. Preliminary checks passed for the loads you entered. Local approval not checked.
All 9 plans, drawn to the same scale
6x6 Low deck for little ones planOpen deck
8x8 A-frame tree fort planFort- 8x8 Open tree fort planOpen deck
8x8 Half-wall tree fort with a roof planFort
8x8 Tree fort with a swing set planWith swing set
8x8 Open fort with a swing set planWith swing set
8x10 Playhouse with a swing set planWith swing set
8x10 Raised playhouse planPlayhouse
10x12 Big six-post tree fort planFort
9 starting designs
Browse the plans by kind and height.
Kind
Showing all 9 plans.
- Open deck
6x6 Low deck for little ones
A 30 in deck for ages 2 to 12: a guard sized for under 5s, easy stairs and playground mulch all round.
- Deck
- 2 ft 6 in
- Posts
- 4
- Way up
- Stairs
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $2,423
- Fort
8x8 A-frame tree fort
An A-frame roof down to the deck, open at both ends, 4 ft up with a step ladder.
- Deck
- 4 ft
- Posts
- 6
- Way up
- Step ladder
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $4,116
- Open deck
Your finder pick
8x8 Open tree fort
An open deck 5 ft up on four posts, a climb-proof guard and a rung ladder.
- Deck
- 5 ft
- Posts
- 4
- Way up
- Rung ladder
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $2,898
- Fort
8x8 Half-wall tree fort with a roof
Solid half-walls, a shed roof on corner posts and a step ladder.
- Deck
- 5 ft
- Posts
- 6
- Way up
- Step ladder
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $4,450
- With swing set
8x8 Tree fort with a swing set
A half-wall fort with a climbing wall, a green slide and a two-seat swing set on its own frame, 9 ft away.
- Deck
- 5 ft
- Posts
- 6
- Way up
- Climbing wall
Preliminary checks passed for the loads you entered. Local approval not checked. 1 item to settle before you build: swing beam and legs.
Materials about $7,243
- With swing set
8x8 Open fort with a swing set
An open deck 5 ft up with a step ladder and a green slide, and a two-seat swing set on its own frame, 9 ft away.
- Deck
- 5 ft
- Posts
- 4
- Way up
- Step ladder
Preliminary checks passed for the loads you entered. Local approval not checked. 1 item to settle before you build: swing beam and legs.
Materials about $5,635
- With swing set
8x10 Playhouse with a swing set
A playhouse 5 ft up with a porch, stairs and a green slide, and a two-seat swing set on its own frame, 9 ft away.
- Deck
- 5 ft
- Posts
- 6
- Way up
- Stairs
Preliminary checks passed for the loads you entered. Local approval not checked. 1 item to settle before you build: swing beam and legs.
Materials about $8,234
- Playhouse
8x10 Raised playhouse
A playhouse 6 ft up with a 3 ft porch, a gable roof, two windows and stairs.
- Deck
- 6 ft
- Posts
- 6
- Way up
- Stairs
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $5,832
- Fort
10x12 Big six-post tree fort
A 10x12 open deck 6 ft up on six posts, a gable roof and stairs.
- Deck
- 6 ft
- Posts
- 6
- Way up
- Stairs
Preliminary checks passed for the loads you entered. Local approval not checked.
Materials about $6,104
Need another size?
The designer takes a deck from 6 ft to 12 ft wide, 2 ft to 12 ft up, with an open deck, half-walls or a playhouse. It sizes the posts, checks the guard and the gaps, and prices it as you go. Free, no account.
Design your own size
No starting plan matches both filters. The designer draws any size in between.
| Plan | Kind | Deck | Posts | Way up | Materials, about | Of it, surfacing | Build time | Checks |
|---|---|---|---|---|---|---|---|---|
| 6x6 | Open deck | 2 ft 6 in | 4 | Stairs | $2,423 | $1,050 | 36 to 52 h | Passed |
| 8x8 | Fort | 4 ft | 6 | Step ladder | $4,116 | $1,190 | 46 to 68 h | Passed |
| 8x8 | Open deck | 5 ft | 4 | Rung ladder | $2,898 | $1,120 | 36 to 52 h | Passed |
| 8x8 | Fort | 5 ft | 6 | Step ladder | $4,450 | $1,190 | 46 to 68 h | Passed |
| 8x8 | With swing set | 5 ft | 6 | Climbing wall | $7,243 | $3,010 | 58 to 86 h | Passed, 1 before you build |
| 8x8 | With swing set | 5 ft | 4 | Step ladder | $5,635 | $3,080 | 46 to 68 h | Passed, 1 before you build |
| 8x10 | With swing set | 5 ft | 6 | Stairs | $8,234 | $3,360 | 66 to 98 h | Passed, 1 before you build |
| 8x10 | Playhouse | 6 ft | 6 | Stairs | $5,832 | $1,540 | 58 to 86 h | Passed |
| 10x12 | Fort | 6 ft | 6 | Stairs | $6,104 | $1,820 | 60 to 88 h | Passed |
Each row is the starting plan as drawn, for 20 psf of ground snow and a 12 in frost line. The materials total is rounded shelf prices, before sales tax, delivery, labor and site work, with the required safety surfacing under the play area in it. Home Depot prices read October 2026. Build time is total labor hours; a crew of two puts in about 16 a day.
Plans by kind
Start from what you want to build.
Collections compare their plans side by side: what each costs, how high the deck goes and what it has to clear.
Tree fort plans
5 designs on four or six posts, from an open deck to a 10 ft fort 6 ft up. No tree needed.
5 plans
Treehouse without a tree
Freestanding on its own posts, so it goes where you want it: 6 plans from a 2 ft 6 in deck to a 6 ft fort.
6 plans
Playhouse plans
A playhouse up on posts with walls, windows and a porch, and simpler starts for little ones. 4 plans.
4 plans
Swing set fort plans
A fort or a playhouse beside a swing set that stands on its own frame. 3 plans.
3 plans
Photos are illustrations of the kind of build, not of the plan in the table.
The $29 builder's plan
See a real plan before you buy.
These are sheets from the 31-sheet plan for the 8x10 raised playhouse. Yours is drawn from the treehouse you design, for one payment. Designing, checking and pricing it is free.
Free
- The design in 3D, and every change you make to it
- Every preliminary check, with its rule and its source
- The structure and its safety surfacing priced line by line
- A summary PDF of the design and its checks
$29 once
- Posts and footings dimensioned from one corner, with the hole depth for your frost line
- The platform framing, the guard with its baluster gap, and the way up with every rise
- The roof, the playhouse walls, the slide and the swing set when your design has them
- The cut list, the shopping list with store prices and the build, step by step
You check out in the designer, with your design loaded. If the plan has an error, we fix it or refund you within 30 days. Guarantee terms.
Real sheets from the 31-sheet sample plan for the 8x10 raised playhouse
01Posts and footings
02Guard and access details
03Safety surfacing
04Connection details
Questions
Anything else? Write to us or read the guides.
Questions about treehouse plans
Our plans use 2x8 joists (big six-post tree fort, 10 ft span), all at 16 in on center. The designer picks the smallest size whose span passes the table the planner follows (Southern pine: 2x6 to 9 ft, 2x8 to 11 ft 10 in, 2x10 to 14 ft), then shows how much of the limit each joist uses. A wider deck gets a bigger joist or a center beam on six posts.
Pressure-treated lumber where it touches the ground or sits close to it, and for the posts: the planner calls for UC4A treated lumber in ground contact and UC3B above ground. The posts are 6x6 treated pine, the decking and joists are treated lumber, and the walls are 2x4 framing with T1-11 siding. The materials list on each plan names every board.
Yes. Every plan opens in the designer. The deck can be from 6 ft to 12 ft wide and 6 ft to 12 ft long, 2 ft to 12 ft up. The framing, the guard, the checks and the materials list follow every change, and a design that cannot be built is stopped with the reason.
Materials with the safety surfacing run from about $2,423 (low deck for little ones) to about $8,234 (playhouse with a swing set), before sales tax, delivery, labor and site work. Home Depot prices read October 2026. The surfacing under the play area is required, so it is in every total. See the treehouse cost guide.
The open tree fort, an 8x8 deck 5 ft up on 4 posts, comes to about $2,898 in materials, $1,120 of it the safety surfacing under it, and the build is about 36 to 52 labor hours. Adding a roof and half walls on the same deck brings it to about $4,450. Home Depot prices read October 2026.
Your yard, your treehouse
Size it before you buy a board.
Start from any of the 9 plans or a blank deck. Change the size, the height and the roof; the posts, the guard and the materials list follow every change. Free, no account.
Design my treehouse, free- Designing
- Free
- Builder's plan
- $29 once
- Account
- Not needed
