Santa Clara · Santa Clara County
ADU Design & Build in Santa Clara, California
From Old Quad to the newer subdivisions, Santa Clara homeowners use ADUs for rental income, multigenerational living, and home-office space.
Building ADUs in Santa Clara, California
SHAPE designs and builds accessory dwelling units for homeowners in Santa Clara, California, across Old Quad, Forest Park, Killarney Farms, Rivermark, and the neighborhoods around Santa Clara University.
Santa Clara's mix of university renters, tech workers, and multigenerational households makes it one of the most reliable ADU rental markets in the South Bay.
We're a licensed California general contractor (CSLB #1158688) with an in-house architecture and modular construction team. That means one contract, one fixed price, and one team responsible from the first site walk through final inspection with the Santa Clara building department.
Santa Clara ADU Rules at a Glance
- Setbacks: California state law caps rear and side setbacks for new ADUs at 4 feet, and Santa Clara follows that standard.
- Height: Detached ADUs are generally allowed up to 16 feet, or up to 18–25 feet on lots that meet transit or multi-story criteria under state law.
- Maximum size: Santa Clara permits detached ADUs up to 1,200 sq ft and allows JADUs inside the existing footprint of the primary home.
- JADUs: Junior ADUs (up to 500 sq ft) are allowed inside the existing footprint of the primary home, in addition to a detached ADU on most single-family lots.
- Parking: No replacement parking is required when an ADU is built within one half-mile of public transit, which covers most Santa Clara lots.
SHAPE handles the full permit package with the Santa Clara planning department, zoning verification, building plans, Title 24 energy, and every correction cycle, so you don't have to learn the code.
Our Process
- Site assessment. We walk your Santa Clara lot, confirm setbacks and utility locations, and give you a feasibility read and an all-in price the same week.
- Design. Our in-house architects design the ADU around your lot, your family, and your budget, with fixed pricing before you sign.
- Permits. We submit, respond to every planning and building comment, and drive the file to permit issuance with Santa Clara.
- Build. Modules are fabricated in our facility while site work, foundation, utilities, landscaping, runs in parallel. Set and finish happen on site.
Frequently asked
- How much does an ADU cost in Santa Clara?
- SHAPE's published prices start at $223,000 for Model 1, $263,000 for Model 2, and $343,000 for Model 2X on a typical lot. The final fixed quote in Santa Clara depends on size, finishes, utilities, access, and site conditions.
- How long do permits take in Santa Clara?
- California law requires ministerial ADU review within 60 days of a complete submittal. Real-world timelines in Santa Clara typically run 2–4 months including corrections. SHAPE manages every submittal and response with the Santa Clara planning department.
- Do I need to add parking for an ADU in Santa Clara?
- In most cases, no. California state law waives ADU parking requirements when the unit is within a half-mile of public transit, which covers most single-family lots in Santa Clara.
- What size ADU can I build in Santa Clara?
- Santa Clara permits detached ADUs up to 1,200 sq ft and allows JADUs inside the existing footprint of the primary home. On top of local rules, California state law guarantees at least 800 sq ft on most single-family lots regardless of local FAR limits.
- Can I rent out an ADU in Santa Clara?
- Yes. California state law allows long-term (30+ day) rentals of ADUs statewide. Short-term rentals are set by the city, Santa Clara, like most Bay Area jurisdictions, restricts or prohibits stays under 30 days.
Nearby cities we serve
Get a Free Site Assessment
Tell us about your Santa Clara lot and what you'd like to build. We'll walk the property, confirm feasibility, and come back with a fixed all-in price, no obligation.
