Redwood City / Bathroom remodeling
Bathroom Remodeling in Redwood City
The typical Redwood City home dates to 1969. Its bathroom code dates to 2026.
Redwood City adopted the 2025 California codes on January 1, 2026, and publishes its own bathroom remodel requirements. We remodel bathrooms here under one license, with permits, rough-in inspections and the final booked through eTRAKiT.
ONE-STOP OR FULL REVIEW
Which permit path your bathroom takes.
Redwood City's One-Stop service lets a plan reviewer approve a complete residential remodel while you wait. A few project types are excluded because of complexity.
One-Stop works when
- The project is a residential interior alteration or remodel
- Plans, scope and the permit application are complete and in PDF
- No Architectural Permit is needed first
- It fits a session, Monday to Thursday, 1 to 3pm
Full plan review when
- An addition over 400 square feet is included
- An addition under 400 square feet comes with an interior remodel
- Additions and alterations were finaled in the last three years
- The work creates an ADU or changes occupancy
No permit needed for
- Painting, flooring and similar finish work under CBC 105.2
- Replacing outlets or switches in the same locations
- Refacing existing cabinets
WHAT A REDWOOD CITY BATHROOM NEEDS
The city's checklist, before the tile.
Redwood City's Kitchen, Bath and Laundry Remodel Requirements, revised January 2026, spell out what an inspector checks: shower size, fan airflow, circuits, glass and fixture flow rates. Residential interior remodels qualify for the city's One-Stop plan review, so a complete set of plans can be approved while you wait.
Shower size
At least 1,024 square inches inside and able to fit a 30 inch circle, with a 22 inch clear exit and safety glass on doors and on windows within 60 inches.
Water-saving fixtures
Toilets at 1.28 gallons per flush, showerheads at 2.0 gpm, lavatory faucets at 1.2 gpm. Older fixtures elsewhere in the house may need replacing under SB 407.
Ventilation
A fan moving at least 50 CFM, ducted outside at least 3 feet from openings, switched apart from the lights unless a humidistat runs it.
Electrical
A 20 amp receptacle circuit, GFCI and tamper-resistant outlets, an outlet within 3 feet of each basin and at least one light on a vacancy sensor.
Valves and walls
Pressure-balanced or thermostatic valves limited to 120 degrees, and nonabsorbent finishes to 6 feet. Purple board cannot take tile directly in a shower.
Water heater switch
If the gas water heater is replaced, Redwood City pays $500 and WestLight Energy adds its own heat pump rebate. We add the 240 volt circuit in-house.
REDWOOD CITY AT A GLANCE
Permits, inspections and rebates in Redwood City.
The Building Division at 1017 Middlefield Road handles permits and inspections, Public Works runs the city's own electrification rebates, and WestLight Energy adds county-wide rebates on top.
- 1969
- median year a Redwood City home was built
- 82,974
- residents, 2024 Census estimate
- 3 to 8
- days ahead that online inspection requests are scheduled
Permits
Building & Code Enforcement
Permit applications and plans are submitted online; status is checked on eTRAKiT. Walk-in counter hours are Monday to Thursday, 10am to 4pm, with virtual service Monday to Friday.
(650) 780-7350Building Division ↗Inspections
Online through eTRAKiT
The inspection phone line is being phased out. Inspections run Monday to Friday, 9am to 4pm, and arrive within two hours of the posted time on the day's schedule.
Inspections ↗Rebates
Redwood City Public Works
The city's Building Electrification Rebate pays $500 for a heat pump water heater and up to $500 for a required panel upgrade. Eligibility must be confirmed by phone before buying equipment.
(650) 780-7464Environmental Initiatives rebates ↗Code
2025 codes since January 1, 2026
The city's bathroom rules follow the 2025 California codes with local amendments, summarized in its Kitchen, Bath and Laundry Remodel Requirements.
Remodel requirements ↗
DESIGN IDEAS
Bathrooms to start the conversation.
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Planning the work
How a Redwood City bathroom project runs.
Site visit
Free visit. Layout, fixtures, panel capacity, the water heater and the age of the finishes.
Plans and One-Stop
Existing and proposed plans with a written scope, reviewed at a One-Stop appointment or submitted online through eTRAKiT.
Rough-in
Plumbing, electrical and waterproofing inspected before tile. Online requests are scheduled 3 to 8 days out.
Finishes and final
Tile, fixtures, smoke and CO alarms, final inspection, then rebate paperwork within 90 days.
REDWOOD CITY AND WESTLIGHT ENERGY
Rebates that fit a bathroom project.
When a bathroom remodel replaces the water heater, Redwood City and WestLight Energy rebates can both apply. Both require a permitted installation, so the permit names the upgrade.
Redwood City
Heat pump water heater
$500
Replacing a gas water heater. Equipment bought July 1, 2026 to June 30, 2027; homeowners only.
Redwood City
Panel upgrade for heat pump equipment
up to $500
One per residential unit, when the panel upgrade is required for the new equipment.
Redwood City
Income-qualified permit help
$500
Extra for CARE, FERA or WSRAP customers in the city's electrification rebate program.
WestLight
Gas to heat pump water heater
$3,500
For replacing a gas water heater. Up to two per account.
Amounts from redwoodcity.org Environmental Initiatives Rebates and westlightenergy.org, October 2026. Funds are first come, first served.
WHAT TRIPS UP REDWOOD CITY REMODELS
Problems Redwood City homeowners run into, and how we plan around them.
From the city's building FAQs, inspection page and remodel requirements.
Inspection slots are days out, and the phone line is going away.
Inspections are requested online the moment work is ready to cover, since the city schedules 3 to 8 days ahead.
Permit questions by email take days to answer.
Plans, scope and application go in complete, which avoids the back-and-forth the city warns can take up to 3 days per reply.
Opening the ceiling triggers hardwired smoke alarms.
Interconnected, hardwired smoke and CO alarms are priced into the scope whenever finishes come off and wiring is reachable.
An old toilet elsewhere in the house holds up the final.
Every fixture in the home is checked against SB 407 at the site visit, so replacements are planned, not discovered.
Contractors cannot work weekends without a 30-day request.
Schedules run on weekdays from the start, and any weekend work is requested well ahead in writing.
Demolition uncovers unpermitted past work.
Unpermitted work must be legalized with plans, and inspectors may ask for finishes to be opened, so suspect areas are flagged before the quote.
Sources: redwoodcity.org Building FAQs and inspections page; Kitchen, Bath and Laundry Remodel Requirements, January 2026.
Do I need a permit to remodel a bathroom in Redwood City?
Yes, for any new or changed building, electrical, plumbing or mechanical work. Redwood City exempts only work listed in CBC 105.2, such as painting and flooring, and like-for-like swaps such as outlets and switches in the same locations. Moving a fixture or adding a circuit needs a permit.
What size does a shower have to be in Redwood City?
At least 1,024 square inches of finished interior area and able to contain a 30 inch circle, under CPC 408.6 as listed in the city's remodel requirements. The threshold must leave a 22 inch clear opening, and glass doors and partitions need safety glazing.
Can I get a same-day bathroom permit in Redwood City?
Yes, often. Residential interior remodels qualify for One-Stop plan review, held Monday to Thursday from 1 to 3pm in person or requested by email after an eTRAKiT submittal. Without it, the city lists residential alteration review at 3 to 4 weeks.
How do I schedule a building inspection in Redwood City?
Online through eTRAKiT. The city is phasing out its inspection phone line, schedules online requests 3 to 8 days ahead and inspects Monday to Friday from 9am to 4pm, without guaranteed morning or afternoon slots.
Can contractors work on weekends in Redwood City?
No, not without approval. Contractors may work 7am to 8pm Monday to Friday; weekend or holiday work needs a request 30 calendar days ahead and written approval from the Building Official. Homeowners doing their own work may work weekends from 9am to 5pm.
Does Redwood City give a rebate for a heat pump water heater?
Yes. Redwood City pays homeowners $500 for replacing a gas water heater with a heat pump model bought July 1, 2026 to June 30, 2027, plus up to $500 for a required panel upgrade. WestLight Energy's own rebate can be added on top.
