Free tiny house floor plans with a sauna
Six original concept plans from 396 to 900 square feet. Every one has a built-in sauna, lots of windows, a front porch and a back deck with room for a cold plunge.
These plans are built around one idea: a small home can still have a real wellness routine. Each one puts the sauna next to an outdoor deck so you can go from heat to a cold plunge in a few steps. They range from a 396 square foot park model to a 900 square foot two-bedroom cottage. They are concept plans for inspiration, not construction drawings.
All six plans at a glance
| Plan | Heated area | Beds | Baths | Sauna | Porch + deck | Windows | Best for |
|---|---|---|---|---|---|---|---|
| The Park Model Spa | 396 sq ft | 1 | 1 | 5′ × 5′ | 162 sq ft | 10 + slider | An RV park or tiny home community lot |
| The Sauna Studio | 400 sq ft | 1 | 1 | 4′ × 5′ | 144 sq ft | 7 + slider | One person or a couple on a small lot |
| The Sauna A-Frame | 480 sq ft | 1 + loft | 1 | 5′ × 5′ | 272 sq ft | 7 + slider | A cabin lot or a backyard with room to look at |
| The Cold Plunge Cottage | 528 sq ft | 1 | 1½ | 5′ × 4′ | 196 sq ft | 9 + slider | A backyard cottage or guest house |
| The Two Suite Retreat | 768 sq ft | 2 | 2½ | 5′ × 5′ | 272 sq ft | 13 + slider | Two adults, a rental unit or a parent's suite |
| The Courtyard Cottage | 900 sq ft | 2 | 2 | 7′ × 6′ (4 people) | 240 sq ft | 14 + slider | A full-time home for two |
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The Park Model Spa: 396 sq ft, 1 bed, 1 bath
A 12 by 33 foot park model with the bedroom at one end and a spa bath at the other. The sauna has its own side door to a small plunge deck, so you can go sauna, plunge, repeat without walking through the house. At 396 square feet it stays under the 400 square foot limit for park model RVs built to ANSI A119.5.
- Under the 400 sq ft park model limit (ANSI A119.5)
- 12 ft wide; park trailers can be up to 14 ft
- Sauna steps out the side door to the plunge deck
- Bedroom at one end, spa bath at the other
The Sauna Studio: 400 sq ft, 1 bed, 1 bath
A 20 by 20 square plan with one big living and kitchen space facing the porch through a glass slider. The sauna opens from the bathroom and straight out to the back deck. At 400 square feet it sits right at the size limit of the tiny house appendix in the Florida Building Code.
- Sauna fits 2 people: 4 ft × 5 ft
- Opens to the bath and to the back deck
- Glass slider to the porch; 7 windows
- At the Florida Building Code tiny house limit (400 sq ft)
The Sauna A-Frame: 480 sq ft, 1 bed, 1 bath
The classic A-frame, built around a full-height glass gable that faces the front deck. The main floor holds the bedroom, bath, laundry and sauna along the back; a loft over the living room works for sleeping or an office. A-frame walls slope, so plan furniture for lower headroom near the sides.
- Full-height glass gable wall faces the deck
- Sleeping or office loft above the living room
- Sauna and laundry tucked along the back wall
- Main floor fits most backyard home (ADU) caps
The Cold Plunge Cottage: 528 sq ft, 1 bed, 1½ bath
A 24 by 22 backyard cottage where the half bath does double duty as the sauna's changing room. The sauna steps out to a cold-plunge deck, and the bedroom gets a full bath and a walk-in closet. It fits under Clearwater's 750 square foot ADU cap.
- Half bath doubles as the sauna changing room
- Sauna steps out to a cold-plunge deck
- Stacked washer and dryer in the kitchen
- 9 windows plus a 4 ft glass slider
The Two Suite Retreat: 768 sq ft, 2 bed, 2½ bath
Two bedroom suites at opposite ends of a central living room, each with its own bath and closet, so two adults (or an owner and a renter) get real privacy. The sauna and half bath form a spa corner off the back deck. At 768 square feet it fits under St. Petersburg's 800 square foot ADU cap, which also limits an ADU to 67% of the main house.
- A bedroom suite at each end for privacy
- Sauna and half bath form a spa corner off the back deck
- 5 ft glass slider to a 20 ft front porch
- Fits St. Pete's 800 sq ft backyard home (ADU) cap
The Courtyard Cottage: 900 sq ft, 2 bed, 2 bath
A 30 by 30 cottage for full-time living. One bedroom opens off the living room and the other off a short hall that also links the second bath, laundry and a four-person sauna. The sauna opens onto a private courtyard deck.
- 4-person sauna opens to a private courtyard deck
- Split bedrooms: one off the living room, one off the hall
- Hall links bath 2, laundry and sauna
- 14 windows plus a 6 ft glass slider
Adding a sauna to a small home
- Power. Electric sauna heaters usually need their own circuit, often 240 volts. Pick the heater before you finalize the electrical plan and follow the maker's requirements.
- Air and moisture. In Florida's humidity, vent the sauna and the bathrooms to the outside and use materials rated for wet, hot rooms.
- Placement. Put the sauna next to a bathroom or an outside door. Every plan here does one or both, so there's a shower or a plunge a few steps away.
- Weight. On a trailer or park model chassis, a sauna, plunge tub and tile add weight. Ask the builder what the chassis is rated for.
Before you build one of these
- Check that the house is allowed on your lot. Start with are tiny homes legal in Florida and the Tampa Bay ADU rules.
- Get construction drawings. A licensed architect or engineer has to turn a concept plan into drawings that meet the Florida Building Code, including wind load.
- Price it. Run the numbers in the tiny house cost calculator and compare builder prices in the Southeast.
- Plan the space you'll actually use. The square footage planner helps you test a layout against your own furniture and routines.
Questions people ask
Are these floor plans free?
Yes. All six concept plans are free to view on this page, and the PDFs are free to download. We ask for an email address so we can send you new plans as we draw them; you can unsubscribe any time.
Can I build a house from these plans?
Not as they are. These are concept plans that show layout and room sizes. To build, you need construction drawings prepared or reviewed by a licensed architect or engineer, and in Florida that includes design for wind load and, where it applies, flood zone rules. Your city or county also decides whether the house is allowed on your lot.
How big does a sauna need to be?
In these plans, a 4 by 5 foot room seats two people and a 7 by 6 foot room seats about four. Size the room to the heater you choose and follow the heater maker's clearance and electrical requirements.
Can I put a sauna in a tiny house on wheels?
Some builders do, but weight, power and ventilation all get harder on a trailer. The park model plan here is the closest: it keeps the sauna at one end with its own outside door. Check with the builder and with any RV park about what they allow.
Notes
All six plans are original concept designs by Little House Studios. Size references: the Florida Building Code tiny house appendix covers homes of 400 sq ft or less (see are tiny homes legal in Florida); ADU caps are from our Tampa Bay ADU rules guide, checked October 2026. Plans © 2026 Little House Studios; free for personal use.