Free cabin plan · PDF download
14x20 Gambrel Cabin Plans
A 280 sq ft barn-roof cabin with a 10-foot loft, where the gambrel roof turns the upper floor into usable room instead of attic.
Plan specs
- Footprint
- 14' x 20'
- Floor area
- 280 sq ft
- Loft
- 200 sq ft (10' deep)
- Porch
- 120 sq ft (6' deep, front)
- Wall height
- 8'
- Roof
- Gambrel (barn), 8/12 pitch
- Roofing
- Asphalt shingles
- Siding
- T1-11 panels
- Foundation
- Concrete piers
- Windows / doors
- 5 / 1
- Est. materials
- $10,380
Every figure here comes from the same engine the 3D builder runs, so it matches what you get when you open the plan.
About this plan
What the 14×20 Gambrel Cabin is for.
A gambrel roof breaks each side into a steep lower slope and a shallow upper one. The steep part is almost a wall, so the loft under it has standing room across most of its width, which a gable roof on the same footprint cannot give you.
The trade is framing complexity: every rafter pair has a joint where the two slopes meet. Gusset plates at that joint are the usual way to do it, and it is worth building one test pair on the ground before cutting the rest.
At 14 feet wide the loft can run 10 feet deep along the back wall and still leave a 4-foot strip along the front open to the roof, so the room below does not feel capped.
Good for
- The most loft space for the footprint
- A barn look on a small building
- Converting a common gambrel shed size into a cabin
The drawings
Elevations, section, and foundation.
The same views that are in the PDF, dimensioned in feet and inches. Download the PDF to print them at letter size.
Materials list
About $10,380 in materials.
Quantities come off the plan's dimensions with a 10 percent waste allowance, priced at typical U.S. retail. This is the shell only: labor, insulation, interior finishes, plumbing, and electrical are not included.
| Item | Qty | Unit | Est. cost |
|---|---|---|---|
| Foundation | $351 | ||
| Concrete pier blocksPre-cast pier blocks | 13 | ea | $195 |
| 4x4x8 treated postsPressure-treated | 13 | ea | $156 |
| Framing | $3,669 | ||
| 2x6 plates (bottom + double top)Treated bottom plate | 225 | LF | $405 |
| 2x6x8 wall studs16" OC | 97 | ea | $728 |
| 2x10 headers (doubled)Over window/door openings | 53 | LF | $148 |
| 2x10x14 floor joists16" OC | 19 | ea | $745 |
| 2x10 rim joist | 75 | LF | $210 |
| 2x8x14 ceiling joists16" OC | 19 | ea | $585 |
| 2x8x10 rafters | 38 | ea | $787 |
| 2x10 ridge board | 22 | LF | $62 |
| Sheathing | $1,393 | ||
| 7/16" OSB wall sheathing (4x8) | 15 | sheets | $420 |
| 1/2" plywood roof sheathing (4x8) | 17 | sheets | $595 |
| 3/4" T&G plywood subfloor (4x8) | 9 | sheets | $378 |
| Roofing | $743 | ||
| Asphalt shingle bundles3-tab or architectural | 16 | bundles | $560 |
| Roof underlayment (synthetic)400 sqft/roll | 2 | rolls | $100 |
| Drip edge | 83 | LF | $83 |
| Siding | $720 | ||
| T1-11 siding (4x8) | 15 | sheets | $600 |
| Housewrap9ft x 100ft rolls | 1 | rolls | $120 |
| Windows & Doors | $1,430 | ||
| WindowsStandard double-hung | 5 | ea | $1,000 |
| Window trim/casing | 5 | sets | $150 |
| Exterior doorsPre-hung exterior | 1 | ea | $250 |
| Door trim/casing | 1 | sets | $30 |
| Porch | $1,026 | ||
| Deck boardsPressure-treated | 132 | sqft | $396 |
| 6x6 porch posts8ft pressure-treated | 5 | ea | $125 |
| 2x8 porch joists16" OC | 113 | LF | $249 |
| Porch railing | 32 | LF | $256 |
| Loft | $760 | ||
| 2x8 loft joists16" OC spanning width | 139 | LF | $306 |
| 3/4" plywood loft floor (4x8) | 7 | sheets | $294 |
| Loft railing/guard | 20 | LF | $160 |
| Fasteners & Hardware | $288 | ||
| Nails, screws, joist hangersAssorted construction fasteners | 824 | sqft (est.) | $288 |
| Estimated materials total | $10,380 | ||
These are concept drawings for planning and estimating, not engineered or stamped plans. Have a builder or engineer check framing sizes, spans, and connections for your snow, wind, and soil conditions before you order materials.
Common questions
Building the 14×20 Gambrel Cabin.
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