San Mateo County · California
Redwood City ADU guide: local rules, permits & property planning
Redwood City’s online permit records let owners compare actual conversions with new detached projects. A finaled garage conversion provides a more useful reference than assuming every backyard ADU follows the same construction scope.
Local planning guide · Reviewed October 2, 2026
What matters for an ADU in Redwood City
Permitting authority: City of Redwood City — ADU ordinance and applications
Official local guidanceLocal rules and design checks
| Topic | Local guidance |
|---|---|
| Application package | Submit construction plans, the building application and the City’s ADU checklist together. |
| Project classification | Describe an existing-garage conversion accurately rather than using a new-detached-unit scope. |
| Permit milestones | Distinguish approval, issuance and final inspection when evaluating a local project example. |
Selected local requirements, not a complete zoning determination. Confirm the current rules for your address with the responsible agency.
Fees and budget checks
Use Redwood City’s Master Fee Schedule for a new estimate. As a historical example only, permit ADU24-0050 lists $5,970.59 in total charged fees; its project-specific 2024 charges are not a 2026 quote.
Redwood City planning permits, fees and handoutsHow to start the permit process
Prepare the ADU checklist and construction set, then apply through Redwood City eTRAKiT. Track reviews and inspections in the permit record through final approval.
Public permit record — finaled
Finaled 435-square-foot garage conversion
City record ADU24-0050 describes converting a detached two-car garage into a 435-square-foot ADU and records final approval on February 9, 2026. This is an independent public permit example, not an ADU.zone project.
View the original sourceRedwood City ADU questions
- Is there a documented local garage-conversion example?
- Yes. ADU24-0050 records a 435-square-foot conversion with a finaled status.
- Can I use that permit’s fees as my budget?
- Use it only to understand an actual historical case. A different size, scope and application date require a new City assessment.
Sources for this guide
- City of Redwood City — ADU ordinance and applications
- Redwood City planning permits, fees and handouts
- Finaled 435-square-foot garage conversion
Local sources reviewed October 2, 2026. Historical examples retain their stated dates. Contact ADU California to confirm project availability; this guide does not establish an office location or property approval.
A useful first review
Separate what is available from what still needs verification.
01
Confirm the property
Start with a complete address and review the available parcel, building, and map context.
02
Identify the unknowns
Keep missing setbacks, easements, utilities, access, hazards, and local requirements visible.
03
Choose the next review
Use the preliminary result to prepare a focused conversation with the required professionals and agencies.
Explore project types
Compare the scope before choosing a solution.
These pages explain the questions each project type introduces. They do not assert that a particular scope is permitted or suitable for your address.
Compare planning footprints
See common ADU sizes before choosing a design.
These model pages are planning references only. They are not a statement that a particular size is allowed or buildable at a Redwood City address.
California directory
Explore more city guides.
The next useful action
Put your address at the center of the conversation.
The online review is preliminary and is not a permit decision, survey, engineering opinion, construction document, final price, or guaranteed schedule.