12' x 20' Small Cabin Loft DIY Build Plans

12' x 20' Small Cabin Loft DIY Build Plans

The 12' x 20' Small Cabin Loft is a one-bedroom, one-bathroom DIY cabin plan at 215 square feet plus a sleeping loft — one of the smallest buildable plans in our catalog, and one of the most achievable for a first-time owner-builder. At an estimated materials cost starting around $8,000, this is the cabin plan for buyers who want to break ground without breaking the bank.

The concrete pier foundation keeps site prep minimal and works on uneven terrain, wooded lots, and remote land where heavy equipment access is limited. The 90 PSF roof load is engineered for significant snow accumulation. Ceiling heights range from 8 to 12 feet, with the loft above the main floor providing a dedicated sleeping area that keeps the main floor open for living.

Plan Specifications

• Footprint: 12' W x 20' L
• Height: 15'-1"
• Floor Area: 215 SF + loft
• Bedrooms: 1 (loft)
• Bathrooms: 1
• Foundation: Concrete piers
• Roof Load: 90 PSF
• Ceiling Height: 8'-0" to 12'-0"
• Est. Materials Cost: From $8,000

What's Included

Complete permit-ready plan set including: floor plan, loft plan, foundation plan, roof framing plan, all four exterior elevations, wall sections, structural details, window and door schedule, and a full materials list. Ready for building permit submission in most US jurisdictions.

Who This Plan Is For

Ideal for first-time cabin builders, hunters, off-grid homesteaders, and anyone who wants to build something real with their own hands at a materials cost most people can handle without financing. The small footprint is also a strong fit for lots with restrictive square footage limits or tight setback requirements. At 12 x 20 feet, this cabin is manageable as a solo or two-person build over a summer.

Instant Download

Your complete plan set downloads immediately after purchase. No waiting, no shipping.