Tiny House Plan 550 Sq Ft | 1 Bedroom Cottage Blueprint

Build Your Dream 550 Sq Ft Tiny House: Complete Plans, Instant Download

This charming Adirondack-style tiny house design proves that small can live large. With a 25 ft x 22 ft 8 in footprint and 550 sq ft of heated living space, this 1 bedroom, 1 bathroom cottage delivers an open, light-filled layout with a full-width 25'x7' covered front porch that adds true outdoor living space. It's an ideal choice for owner builders, first-time builders, backyard ADUs, guest houses, in-law cottages, lake and vacation properties, and short-term rental investments.

A Layout That Works

Step off the covered porch into a bright open-concept living room (11'11" x 11'5") and kitchen (12'3" x 11'5") with an island and full appliance layout, including a range, refrigerator, and dishwasher. The bedroom (11'6" x 9') comfortably fits a queen bed, while the generous 7' x 9' bathroom includes a soaking tub. A dedicated laundry nook fits side-by-side washer and dryer, plus a utility closet for mechanicals. The classic gable roof with metal roofing and 20'6" ridge height gives the home its timeless cottage character.

What's Included in Your Download

You receive a complete working drawing sheet set: everything your builder, lumber yard, and permit office need:

• Cover sheet with full project data and area calculations
• General construction notes
• Fully dimensioned ground floor plan and loft plan
• Slab plan layout showing load bearing wall
• Sectional floor plan, ceiling outline, and roof outline
• Building sections A-A' and B-B'
• All four exterior elevations with level datums
• Kitchen and bathroom detail sheets with enlarged plans and sections
• Rafter details with five insulation assembly options
• Wall, window, and flashing installation details
• Exterior wall and foundation details
• Door and window schedule
• Framing details
• Electrical plan with full symbol legend
• Plumbing plan with complete notes
• Complete itemized material list for accurate takeoffs and quotes

We also provide the CAD file with this plan, so your local designer or engineer can easily adapt it to your site and local codes. Our plan packages include the PDF drawings, CAD file, material list, and a reverse (mirrored) plan option, so you can choose the package that fits your build.

Smart Construction, Clearly Documented

The plan uses conventional wood stud framing that any local crew can build: 2x10 floor joists over a concrete pier foundation (great for sloped or wet sites), insulated wall assemblies with housewrap and rain-screen siding details, and multiple rafter insulation options for different climates. Electrical notes cover GFCI protection and interconnected smoke/CO detectors; plumbing notes cover supply, drain-waste-vent, backflow prevention, and low-flow fixtures.

Estimated Build Cost

Most builds land around $130–$220 per heated square foot depending on region, finishes, and labor, roughly $71,500 to $121,000 for this design, plus porch and site work.

Instant Digital Delivery

Your files are available for download immediately after checkout: no shipping, no waiting. The PDF drawings are print-ready: send them to any local print shop and request 100% scale printing so dimensions remain accurate.

Please Note

This is a digital product; no physical item ships, and returns are not accepted. Plans are drawn to California residential code standards and are not sealed or engineered for other states. Most jurisdictions require review by a local licensed engineer or building official before permitting, so please check with your building department before purchase. All drawings are copyright Home Plan DIY, licensed for one personal build only.

Start your tiny house journey today. Download your complete plan set and take the first real step toward building your dream cottage.