A tiny house costs about $30,000 to $60,000 to build in 2026, with an average near $45,000. The full range runs from about $4,000 for a basic DIY shell to $180,000 for a high-end custom build. Per square foot, tiny houses are expensive at $300 to $400, because a kitchen, bathroom and utilities cost nearly the same at any size.
The calculator prices a professionally built tiny house on a permanent foundation with standard finishes, so it runs higher than many DIY trailer builds.
How much does a tiny house cost by size?
| Size | At $300/sq ft | At $400/sq ft |
|---|---|---|
| 150 sq ft | $45,000 | $60,000 |
| 200 sq ft | $60,000 | $80,000 |
| 300 sq ft | $90,000 | $120,000 |
| 400 sq ft | $120,000 | $160,000 |
Most tiny houses are 100 to 400 sq ft. Simple DIY builds and kits come in well under these figures; kits can start under $10,000 for the materials.
What does a tiny house cost line by line?
| Item | Typical cost |
|---|---|
| Trailer (tiny house on wheels) | $4,500–$9,000 |
| Foundation (if built on land) | $4–$7 per sq ft |
| Permits | $500–$3,100 |
| Utility hookups | $750–$25,000 |
| Land | $3,000–$150,000 |
| Kit (materials only) | under $10,000 for basic kits |
Utility costs vary the most: hooking up to existing city water and power is cheap, while drilling a well or adding a septic system on raw land can cost more than the house.
Trailer or foundation?
A tiny house on wheels can move, but local rules often treat it like an RV, which limits where you can live in it full time. A tiny house on a permanent foundation is treated as a dwelling, so it must meet the local building code and zoning minimums. Check both with your county before you buy land or plans.
How do you pay for a tiny house?
Most tiny houses do not qualify for a standard mortgage, because they are too small, too cheap or on wheels. Buyers usually pay cash or use a personal loan. Some certified tiny houses on wheels qualify for RV loans, and a tiny house on a foundation can sometimes be financed like an ADU or with a construction loan.
Frequently asked questions
Is it cheaper to build or buy a tiny house?
Building yourself is usually cheapest if you have the skills and time. Buying a finished tiny house from a builder costs more but includes labor and, often, certification.
How much does a 400 sq ft tiny house cost?
About $120,000 to $160,000 at $300 to $400 per sq ft for a professional build, or much less as a DIY project.
Compare other house types
- Barndominium cost
- Modular home cost
- Manufactured home cost
- Shipping container home cost
- ADU cost
- Custom home cost
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- Duplex cost
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- All house types compared
Sources
- Rocket Mortgage: How much does a tiny house cost? (December 2025)
- HomeAdvisor: Cost to build a tiny house (line-item ranges)