Redwood City is a Peninsula city of about eighty-three thousand residents and the seat of San Mateo County, with a dense downtown, a working port and a large technology employment base. Its Building Division, within Community Development on Middlefield Road, is the sole building authority inside the city.
This guide covers the Building Division, its electronic permit process, Title 24 with city amendments, and the submittal and timing rules that shape Redwood City projects.
This guide covers work inside the City of Redwood City limits. Unincorporated San Mateo County and neighbouring cities are separate authorities.
Redwood City will reject a submittal on the filename alone. The city accepts online permit submittals only, and requires that the application filename include the project address together with the words permit application, and that every accompanying drawing and document also be named with the address. The city states plainly that files not named this way will not be accepted.
What requires a building permit in Redwood City?
California builds on a single statewide code — the California Building Standards Code, known as Title 24 — adopted on a three-year cycle by the California Building Standards Commission. The 2025 edition took effect on January 1, 2026 and governs statewide. Cities and counties enforce Title 24 and may adopt local amendments, but an amendment must be filed with the state and may only be equal to or more restrictive than the state code, justified by local climatic, geologic or topographic conditions. So the first question in Redwood City is which authority has jurisdiction — the city on incorporated parcels, the county in unincorporated territory — and what local amendments sit on top of Title 24.
Permit required
- New commercial, multi-family and residential construction, additions and change of occupancy
- Structural alterations, load-bearing changes, foundations, decks and retaining walls
- Electrical work — services, panels, circuits, solar and EV charging — under the California Electrical Code
- Plumbing under the California Plumbing Code, tied to a licensed contractor
- Mechanical and HVAC change-outs, and work affecting the Title 24 energy envelope
- Re-roofing above the exempt scope, pools, signs, and demolition
Often exempt
- Minor repairs and maintenance replacing materials in kind
- Small accessory structures below the local threshold, where zoning allows
- Painting, flooring, cabinetry and other finish work
- Like-for-like fixture or appliance swaps with no alteration to wiring or piping
Local amendments and thresholds differ from one jurisdiction to the next, so an exempt list from a neighbouring city is not reliable — a project waved through in one place needs a full permit set in the next. An exemption from a building permit is never an exemption from zoning, the statewide energy or green-building codes, or an electrical or plumbing permit. Confirm scope with Building Division before work starts.
The statewide layers that apply everywhere
Several parts of Title 24 apply on top of the base building code and routinely catch projects owners assume are exempt: the California Energy Code (Part 6), among the strictest in the nation; CALGreen (Part 11), California’s mandatory statewide green-building code; and the accessibility provisions in Chapters 11A and 11B. Seismic design is built into the code statewide, and in fire-prone areas the wildland-urban-interface rules of Chapter 7A and Cal Fire defensible-space requirements add a further layer. In the City of Redwood City, the Building Division administers Title 24 with city amendments, enforcing state-mandated energy conservation, accessibility and housing laws alongside the building code.
Who handles permitting in Redwood City?
The Building Division issues building permits and checks building plans to enforce local and state laws related to building construction, maintenance, use, repair and rehabilitation.
| Detail | Information |
|---|---|
| Authority | City of Redwood City Building Division |
| Serves | The City of Redwood City limits |
| Phone | 650-780-7350 |
| Counter | 1017 Middlefield Road, Redwood City |
| Code | Title 24 with Redwood City amendments |
| Filing | Online submittal only, with strict file naming |
| Licensing | State CSLB license; city business licence to work |
| Records | The division holds city permit records |
The Building Division assists with permit applications, inspections, revisions, deferrals and other permitting requirements, and provides inspections for new residential and non-residential buildings, additions, remodels, repairs and changes in use. Once a submittal is uploaded, the permit is assigned to a specific permit technician who contacts the applicant with further instructions, and the city notes that responses can take several business days depending on workload.
Confirm the parcel is inside the city first; unincorporated San Mateo County and the neighbouring Peninsula cities file with different authorities under their own amendments.
Permit types
Residential permits
Residential work inside the city is permitted and inspected by the division under Title 24 and city amendments. Permits are generally required for all work not exempted by the building code, including interior remodels, alterations, additions, new construction and repairs beyond routine exceptions. Plot and finish grading plans follow the city’s engineering standards and stormwater drainage guidelines.
How California contractor credentials work
California licenses contractors statewide through the Contractors State License Board, not locally. The CSLB issues three license types — Class A for general engineering, Class B for general building, and the Class C specialty classifications for individual trades — and a contractor must hold the classification that matches the work. A license is required for any project valued at one thousand dollars or more in combined labour and materials, and, in practice, for any work that requires a permit regardless of value.
In California the license lives with the state, not the city. The same CSLB license is recognised in every jurisdiction, so there is no separate local contractor registration to secure before pulling a permit. What the permitting authority does check is that the license number is active and carries the right classification for the scope, along with workers’ compensation coverage. Confirm the classification matches before filing.
Commercial permits
Commercial and multi-family work goes through division plan check against the California Building Code, the Energy Code and CALGreen, with city amendments, and fire permits run through the fire department’s prevention division separately. It requires CSLB-licensed contractors and drawings stamped by a California-licensed architect or engineer.
Licenses, trade classifications and design professionals
Practically, three credential layers appear on California projects: a CSLB license in the correct classification for the contractor pulling the permit; the specialty C-classifications for the electrical, plumbing and mechanical trades; and, on commercial and larger residential work, drawings stamped by a California-licensed architect or engineer. Confirm what Building Division requires for the specific building before filing.
Redwood City permit costs and fees
Budget the city building permit and plan-review fees, separate trade permits, the state Building Standards and seismic surcharges, and any development impact fees. A business licence must be obtained before conducting work in the city. Confirm the schedule in force on your filing date.
| Fee component | How it works |
|---|---|
| Building permit | Based on project valuation or square footage; set by the local schedule |
| Plan check | A percentage of the permit fee or a flat charge, at submittal |
| Trade permits | Separate electrical, plumbing and mechanical fees |
| State surcharges | Building Standards and seismic (SMIP) fees collected with the permit |
| Impact and school fees | Development impact and school-district fees in growth areas |
| Re-inspections and revisions | Additional fees for failed inspections, revisions and expired permits |
California layers two uniform state surcharges — the Building Standards Administration fee and the Strong Motion Instrumentation seismic fee — on top of the local charges, so they appear on permits everywhere. The building and plan-check fees themselves are local and change, and California law limits them to the reasonable cost of providing the service, so a figure from a neighbouring city is not reliable — ask Building Division for the schedule in force on your filing date.
Need a real number for a specific Redwood City project? Send us the scope, address and valuation and we will identify the authority having jurisdiction, the code edition in force and the fee categories that will apply.
Trade permits and who may pull them
Trade permits are separate from the building permit and, on projects that require one, generally cannot be issued until the building permit is in place. Each trade follows its own part of Title 24 — the California Electrical, Plumbing and Mechanical Codes — and is tied to a contractor holding the matching CSLB specialty classification, the same license statewide.
California runs the trades on one statewide license. Electrical work is tied to a C-10 contractor, plumbing to a C-36, and heating and air to a C-20, each licensed by the CSLB rather than the city, so the credential travels with the contractor from one jurisdiction to the next. What changes locally is the permit itself and any local amendments — confirm both with the authority that issues it.
- Electrical work follows the California Electrical Code and a C-10 electrical contractor.
- Plumbing work follows the California Plumbing Code and a C-36 plumbing contractor.
- Mechanical work follows the California Mechanical and Energy codes and a C-20 HVAC contractor.
Permit required
- Service installations, panel upgrades, new circuits, solar PV and EV chargers
- New plumbing, repipes, water heater change-outs, fixtures, backflow and gas piping
- HVAC installation and change-out, ductwork, venting and commercial kitchen exhaust
- Sprinkler, standpipe and fire alarm work on commercial and multi-family structures
Typically exempt
- Replacing a fixture, switch, receptacle or light with no alteration to wiring or piping
- Clearing a stoppage without replacing or rearranging concealed piping
- Filter, thermostat and routine component service
- Like-for-like appliance repair that does not alter the connection
How to apply for a Redwood City building permit
Only work within the City of Redwood City limits files with the division.
It must be in place before conducting work in the city.
Files not named with the address are not accepted.
Submit through the city’s online upload route, then confirm by email.
Responses can take several business days depending on workload.
Work cannot begin until the permit is issued.
Review, corrections and what actually causes delay
In California, the first cause of delay is uncertainty over jurisdiction — filing with the county when a city should have it, or missing a local amendment on top of Title 24. After that come Title 24 energy and CALGreen documentation, a CSLB classification that does not match the scope, and, in fire or coastal areas, defensible-space or coastal-zone requirements that were not addressed up front. Build the plan-check time into the schedule and confirm the checklist with Building Division before filing.
Approvals do not stay live indefinitely. A California building permit carries a validity period and can expire if work does not start or stalls between inspections. On phased or financed work, keep the permit active with periodic progress inspections and confirm the expiry window before it passes.
Inspections in Redwood City
Where a permit is required, standard checkpoints include footing and foundation, framing, rough-in electrical, plumbing and mechanical, insulation and Title 24 energy, CALGreen measures, fire systems on commercial work, and final, with a certificate of occupancy before use. Plan review timelines on many building permit categories run to several weeks, and the city publishes a wider range for complex projects, so build the review window into the programme.
California inspections are keyed to the code editions in force when the permit issued, so the approved plans and any energy and green-building documentation need to be on site for the inspector to check against. Confirm the notice Building Division needs and schedule around its inspection windows.
Do not cover work before the required inspection has been approved. Keep the issued permit, the approved plans, product listings, Title 24 energy documentation and your correction responses available on site.
Redwood City permit search and official resources
Permit records in California sit with the local authority that issued them. Where the City of Redwood City Building Division is the authority for the City of Redwood City limits, it holds the building permit, the inspection history and the certificate of occupancy. If you are buying, refinancing or renovating, confirm that past work was permitted rather than assuming it was — and confirm the code edition that was in force.
Confirm the authority having jurisdiction and the local amendments first. California enforces one statewide code, Title 24, but each city and county adds its own amendments and fee schedule, so the requirements that apply vary by parcel. Confirm current requirements, fees and review turnaround for your filing date.
These are the primary sources behind this guide. Codes, fee schedules and procedures change — confirm the position for your filing date.
- City of Redwood City Building Division
- California Building Standards Commission (Title 24)
- Contractors State License Board (CSLB)
- California Energy Commission (Energy Code)
- California Department of Housing and Community Development
Frequently asked questions
Who issues building permits in the City of Redwood City?
The Building Division, within Community Development, issues permits for work inside the city; unincorporated San Mateo County and neighbouring cities are separate authorities.
Why was my submittal rejected?
Most often the file naming. The application filename must include the project address and the words permit application, and every drawing and document must also be named with the address.
Do I need a local contractor registration?
California licenses contractors statewide through the CSLB, so no local licensing applies. A business licence must be obtained before conducting work in Redwood City.
How long does plan review take?
Several weeks for many building permit categories, with a wider range published for complex projects. Confirm the current position before committing to a start date.
Who handles fire permits?
The fire department’s prevention division handles fire permit requirements and fees separately from the building permit.
Can I still visit the counter?
Counter service runs on posted in-person days with virtual availability on others, though the city strongly encourages electronic submittals.
Simplify Redwood City permitting with Alliance Permitting
Redwood City rewards precision in the mundane. A correctly named file set is the difference between a submittal in the queue and a submittal that was never accepted.
Trusted by leading builders, developers, and national contractors — 22 years of filing in the jurisdictions we write about.
Contractors and builders choose Alliance for Redwood City because the work is done by people who have stood at the counter:
- We confirm the parcel is inside the city and route it to the division.
- We name every file to the city’s exact convention.
- We secure the city business licence before work begins.
- We manage the assigned permit technician relationship.
- We build the published review window into the programme.
Alliance Permitting is a permit documentation and submission company. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.
Ready to break ground in Redwood City sooner?
Let Alliance prepare, file, and track your Redwood City permits while your crew stays on the job.
More California permitting guides
This guide is provided by Alliance Permitting for general information about Redwood City permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.