Can I Build Tiny Home in San Jose, CA? (2026)
Find out if you can build a tiny home in San Jose, CA. Rules, permit requirements, costs, and next steps.
Tiny homes on permanent foundations are allowed in San Jose, CA. Tiny homes on wheels are not permitted as permanent dwellings.
A tiny home is a small dwelling unit — typically under 400 sq ft — that can be built on a permanent foundation or on wheels. In San Jose, CA, the rules differ significantly depending on whether the structure is on a permanent foundation (treated as a dwelling unit under building code) or on wheels (treated as a recreational vehicle under vehicle code). Tiny homes on permanent foundations must meet a minimum size of 150 sq ft in San Jose.
Tiny Home Rules in San Jose
Tiny Home Rules in San Jose: Foundation-based tiny homes: Permitted. Tiny homes on wheels (THOWs): Not permitted as permanent dwelling — classified as recreational vehicle. Minimum size: 150 sq ft. Tiny homes on permanent foundations must meet California Residential Code minimum habitable space standards (70 sqft per habitable room minimum). San Jose allows small ADUs that function as tiny homes if they meet zoning and building code requirements. Tiny homes on wheels (THOWs) not permitted as permanent dwellings in residential zones. San Jose is exploring accessory dwelling unit villages as a homelessness response strategy.
Costs & Fees
Building permit fees for tiny homes in San Jose follow the same schedule as other new construction. Contact the San Jose Department of Planning, Building and Code Enforcement (PBCE) — Building Division at (408) 535-3555 for current fee information.
Next Steps
Next steps for building a tiny home in San Jose: 1. Determine foundation vs. wheeled — the rules are fundamentally different. 2. For foundation tiny homes, obtain a building permit from the San Jose Department of Planning, Building and Code Enforcement (PBCE) — Building Division. 3. For wheeled tiny homes, verify whether your property allows RV siting. 4. Check if your tiny home could qualify as an ADU on your property.
San Jose Department of Planning, Building and Code Enforcement (PBCE) — Building Division
Frequently Asked Questions
Can I build an ADU in my backyard in San Jose?
Yes. California state law requires San Jose to permit ADUs by-right on all residential lots. You can build a detached ADU up to 1,200 sqft, or a Junior ADU (JADU) up to 500 sqft within your existing home. No owner-occupancy requirement applies. San Jose is one of the most ADU-active cities in California due to its housing shortage. Permits are processed ministerially within 60 days.
What are San Jose's short-term rental rules?
San Jose requires short-term rental registration ($200/year) for all rentals under 30 days. Your property must be your primary residence. Transient Occupancy Tax (10%) applies to all short-term rental income. Register with San Jose Finance Department before listing on any platform. Airbnb collects and remits TOT on behalf of qualifying hosts.
What zoning is needed for a single-family home in San Jose?
Most single-family homes in San Jose are in R-1-6 (6,000 sqft minimum lot) or R-1-8 (8,000 sqft minimum lot) zones. These zones allow one primary dwelling plus ADUs per state law. Front setback is 20 ft, side yards 5 ft, and rear yard 20 ft. Building height is limited to 30 ft (2 stories). Check your specific zone at the San Jose GIS Portal: gisportal.sanjoseca.gov.
Do I need a permit to run a business from my home in San Jose?
Yes. A Home Occupation Permit ($200) is required for any business operated from a San Jose residence. Restrictions include: no clients on-site, no non-resident employees, no exterior signs. Business use must be incidental to residential use. Silicon Valley's startup culture makes home occupation permits very common in San Jose.
Are solar panels required on new homes in San Jose?
Yes. California's Title 24 Energy Code requires solar PV on all new low-rise residential construction. San Jose has one of the highest solar adoption rates in the US. PG&E net metering is available under NEM 3.0. SolarAPP+ provides expedited permits for standard residential systems. San Jose's 300+ sunny days per year make solar highly cost-effective.
What are San Jose's ADU setback requirements?
New detached ADUs in San Jose require 4-foot side and rear setbacks per California state law (Gov Code §66314(d)(7)). No setback is required for an ADU that replaces an existing structure in the same footprint (e.g., garage conversion). Front setbacks follow the applicable zone standards — typically 20 ft for R-1 zones. No minimum ADU lot size requirement.
How do I find the zoning for my property in San Jose?
Use the San Jose GIS Portal at gisportal.sanjoseca.gov to look up your parcel's zone designation, overlay districts, and development standards. You can also call San Jose PBCE at (408) 535-3555 or visit the public counter at 200 E. Santa Clara Street for zoning verification.
Source: San Jose Department of Planning, Building and Code Enforcement (PBCE) — Building Division — Building Regulations. Last verified April 5, 2026. View source