Free Tiny House Tools & Calculators

Yes, all of our tiny house planning tools are completely free to use with no registration required. We provide these calculators to help people make informed decisions about tiny house living, and we update them regularly with the latest data.

Our calculators use real-world pricing data from 2024–2026 and are updated regularly. The Cost Calculator provides estimates based on actual builder quotes and material costs. However, final costs can vary based on your location, specific choices, and market conditions. We recommend using these estimates as a starting point for your budget planning.

The Zoning Finder currently covers 20 U.S. states with comprehensive data on ADU laws, Appendix Q adoption, THOW restrictions, and county-specific building codes. We are continuously expanding coverage and updating regulations as they change.

The mortgage calculator works best for foundation-based tiny houses and park models. Tiny houses on wheels (THOWs) are typically financed through RV loans or personal loans rather than traditional mortgages. Contact lenders who specialize in alternative housing for THOW financing options.

Use our Weight Calculator to estimate your tiny house total weight based on construction materials and dimensions. Compare this to your trailer's GVWR (Gross Vehicle Weight Rating) and ensure your towing vehicle can handle the load. Always leave a safety margin and consult with a professional builder for final verification.

The Off-Grid Solar Calculator estimates solar panel wattage, battery bank capacity, inverter requirements, and charge controller sizing based on your daily energy consumption and location. It factors in seasonal variations and provides recommendations for system components to meet your power needs year-round.