ADU Builder in Redwood City, CA
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Redwood City ADUs
Redwood City allows ADUs of up to 850 sq ft for one bedroom and 1,000 sq ft for more than one, JADUs of up to 500 sq ft, and 4-foot side and rear setbacks for new detached ADUs. The City runs a pre-review program targeting 30-day review, and offers free pre-designed plans of 400, 575, 745 and 800 sq ft.
Mount Carmel’s detached rear garages are common candidates for conversion.
ADU Construction
Permits
Protected trees: private trees over 38 inches in circumference (about 12 inches in diameter) need a permit before any work, usually processed in about 10 working days.
1017 Middlefield Road, Redwood City, CA 94063
Building (650) 780-7350, pe*****@*********ty.org · Inspections (650) 780-7361 · Planning (650) 780-7234, pl******@*********ty.org
In-person counter Monday to Thursday, 10 a.m. to 4 p.m.; virtual Friday, 8 a.m. to 5 p.m. Permits are submitted through eTRAKiT, and a permit technician replies within about 5 business days. Inspections are booked by phone with two-hour arrival windows; a qualified person must be on site with the plans, permit and job card.
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Other Redwood City services: Bathrooms · Kitchens · Additions · New Homes · Redwood City overview
Same service nearby: San Carlos · Atherton · Menlo Park
See how to build an ADU.
Redwood City ADU Builder FAQ
How large can an ADU be in Redwood City?
850 sq ft for one bedroom and 1,000 sq ft for more.
Are there free ADU plans?
Yes, pre-designed plans of 400, 575, 745 and 800 sq ft.
How fast is pre-reviewed ADU approval?
The program targets 30-day review.
Can I convert a detached garage?
Often yes; we confirm the structure and setbacks.