Bathroom Remodel Permit in Los Gatos, CA (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Los Gatos requires a permit if you're relocating any plumbing fixtures, adding electrical circuits, installing new exhaust ventilation, or altering framing. Surface-only work—tile, vanity swap-out in place, or faucet replacement—does not require a permit.

Los Gatos Building Department enforces California Building Code (Title 24) with a notable local wrinkle: the city requires pre-plan review submittal for any bathroom project involving fixture relocation or new drainage lines, and the department uses an online permit portal (through MuniGov or equivalent) that requires all plans be uploaded digitally—no walk-up filing for substantial remodels. This means you cannot get an over-the-counter permit approval on the same day; full plan review typically takes 2 to 5 weeks, with mandatory revisions for missing details like shower waterproofing assembly specs, GFCI/AFCI circuit schedules, exhaust fan duct termination, and trap-arm geometry. Los Gatos sits in a coastal-to-foothills zone (Climate Zone 3B-3C coast, 5B-6B mountains), so seismic bracing for water heaters and frost-depth considerations in hillside projects matter. If your home was built before 1978, lead-paint disclosure and RRP contractor certification is required. Unlike some Bay Area cities, Los Gatos allows owner-builders to pull permits and perform work themselves on their own property, but electrical and plumbing work must be done by licensed contractors (California Business & Professions Code § 7044)—this is a common surprise for DIY-minded homeowners.

What happens if you skip the permit (and you needed one)

Stop-work orders cost $500–$2,000 in fines; the city can padlock your bathroom and require full permit pull with plan review before work resumes.
Insurance denial: homeowners insurance routinely refuses to pay for water damage or liability claims if unpermitted bathroom work is discovered during investigation, potentially leaving you liable for $10,000–$50,000+ in damages.
Resale & title issues: when you sell, California requires disclosure of unpermitted work via the Transfer Disclosure Statement (TDS); buyers often negotiate down 3–8% of sale price or demand removal/legalization ($5,000–$15,000 for retroactive permit + inspection).
Refinance & lender blocking: if you refinance, the lender's appraisal and title search will flag unpermitted work; many lenders refuse to close until permit is obtained and final inspection passed, delaying closing 4–8 weeks or killing the deal entirely.

Los Gatos full bathroom remodel permits — the key details

Los Gatos Building Department enforces California Title 24 (the state energy code) alongside the California Building Code (2022 edition as of 2024), which means your bathroom remodel must meet state-level requirements for GFCI protection (all outlets), AFCI protection (if adding circuits), exhaust fan ventilation (minimum 50 CFM continuous or 20-minute timer per California Energy Code Title 24-2022), and shower/tub waterproofing (IRC R702.4.2 and Title 24 requirements for pan/liner plus cement board or equivalent moisture barrier). The city does NOT have local amendments that further restrict bathroom work beyond state code, but the permit process itself is stricter than it appears: the Los Gatos online portal requires you to upload stamped architectural or engineering plans for any fixture relocation, new plumbing drainage lines, or new electrical circuits. This means you cannot do a napkin sketch and get approved same-day; you need a licensed architect or engineer to stamp plans if the scope is substantial (moving more than one fixture, gutting walls, or adding new circuits). Even simple fixture relocations—moving a toilet to the opposite wall, for example—require a plumbing plan showing the new trap location, trap-arm angle (IRC P2706 limits trap-arm slope to no steeper than 45 degrees and no shallower than 1/4-inch drop per foot), and connection to the existing stack or new stack run. The city's online portal also requires a completed Energy Compliance Form (Title 24 certificate) before issuance, and inspections must be scheduled through the portal; you cannot walk up unannounced to request inspection.

Electrical work in Los Gatos bathrooms is tightly codified under California Title 24 and the California Electrical Code (based on NEC 2020). All bathroom outlet circuits must be GFCI-protected (NEC 210.8(A)(1))—whether hardwired receptacles or a GFCI breaker. If you are adding new circuits (e.g., separate circuit for a heated towel rack or ventilation fan), those circuits must be on a separate breaker from the main bathroom circuit, cannot exceed 20 amps for receptacles, and if they serve a ventilation fan, must be on a dedicated 20-amp circuit (per NEC Article 680 adapted for California). A common rejection point: applicants submit electrical plans that do not clearly mark GFCI locations or specs; Los Gatos inspectors will stop-work the rough-in inspection if GFCI breakers or GFCI receptacles are not clearly called out on the single-line diagram. Likewise, if you are adding a new exhaust fan or upgrading the existing one, the duct must terminate to the exterior (not into the attic), duct diameter and roughness must be specified (typically 4-inch rigid or insulated flex, minimum smooth duct per Title 24), and the fan CFM rating must match or exceed the fixture load. If you are converting a bathtub to a shower (or vice versa), California code treats this as a change to the waterproofing assembly, not merely a cosmetic swap; the shower pan or liner system must be tested or specified in detail (cement board + membrane, prefabricated pan, or equivalent), and the inspector will require a rough-in inspection before tile/cladding goes on—this is a mandatory step and commonly missed by contractors who think they can tile first and permit later.

Waterproofing and shower/tub conversion rules are where Los Gatos inspectors most often issue correction notices. California Title 24 and IRC R702.4.2 require a water-resistant or waterproof membrane behind all tile in shower/tub areas, extending at least 6 inches above the tub rim (or full height of shower surround, whichever is higher). If you are converting a tub to a shower, the old tub drain must be capped or rerouted, and a new shower pan (with trap) must be installed; the pan liner or cement-board-plus-membrane assembly must be inspected in the rough (before tile) and must include a 2-inch curb lip or sloped floor to contain water. Many DIYers or unlicensed contractors skip this step and go straight to tiling, which results in a failed rough inspection and costly removal. If you are adding a new bathroom (vs. remodeling an existing one), different code applies (you need a new vent stack, new sewer lateral connection, etc.), but Los Gatos treats a remodel as work within the existing plumbing envelope, so you are not required to upgrade the main drain line unless the existing line is damaged or does not meet code. However, if you are converting a half-bath to a full bath (adding a tub or shower where none existed), you ARE adding new drainage and must pull a full permit with plan review.

Lead-paint disclosure and RRP certification apply to any Los Gatos home built before 1978. If your bathroom contains original lead-painted surfaces and you are disturbing them (sanding, scraping, or demolition), you must use an EPA-certified RRP (Renovation, Repair, and Painting) contractor or be certified yourself. This is a federal requirement (EPA Rule 40 CFR Part 745) that the building department polices during final inspection; inspectors will ask for proof of RRP certification and may photograph the work area for compliance. Non-compliance carries federal penalties ($15,000–$37,500 per violation) and state penalties. Do not assume that the building department will waive this; they will not. If you are doing the work yourself and your home is pre-1978, you must be RRP-certified; if you hire a contractor, they must provide proof of RRP certification before and after work.

Permit fees in Los Gatos for a full bathroom remodel typically range from $200 to $800, depending on the valuation assigned by the building department. The fee is calculated as a percentage of the estimated construction cost (usually 1.5–2% of project value); a $15,000 bathroom remodel will generate a permit fee of $225–$300, while a $40,000 remodel will cost $600–$800. There is also a plan-review fee (typically $75–$150) and inspection fees ($0–$150 per inspection type, depending on the city's current fee schedule; verify with the department directly). The entire permit process—from submission to final inspection—typically takes 4 to 8 weeks if there are no correction notices; if the city requires plan revisions (common for waterproofing details or electrical spec issues), add 2 to 4 weeks. Scheduling inspections is done online through the portal, and inspectors are usually available within 2 to 3 business days of request.

Three Los Gatos bathroom remodel (full) scenarios

Scenario A

Vanity, toilet, and tile replacement in existing locations—Los Gatos suburban ranch

You are replacing the existing vanity cabinet, toilet seat, and wall tile in your 1970s ranch bathroom in the Los Gatos foothills. The vanity, toilet, and sink remain in their original locations; you are not moving any plumbing fixtures or adding any new drains. The wall tile is being removed and replaced with new tile on existing drywall (no framing changes). You are not adding new electrical circuits or exhaust fans. This work is classified as surface replacement and does NOT require a permit under California code. You can purchase materials, hire a tile contractor, and proceed without any filing. However, if the existing drywall behind the tile is water-damaged or moldy (common in pre-1980s homes), the inspector may recommend fixing it, but that is not a permit requirement. Lead-paint disclosure applies if your home is pre-1978 and you are disturbing painted surfaces (scraping old tile adhesive off painted drywall counts); if so, hire an RRP-certified contractor or become certified yourself. Total cost is $3,000–$8,000 for materials and labor, with zero permit fees. Timeline is 1 to 2 weeks. No inspections are required.

Scenario B

Fixture relocation and new exhaust fan—Los Gatos downtown bungalow, tub to shower conversion

You are converting a 1960s downtown Los Gatos bungalow bathroom from a tub-and-shower combo to a shower-only layout. The toilet is being moved to the opposite wall (new drain run), the vanity is relocating 4 feet to the left (new supply lines and drain), and the existing exhaust fan is being replaced with a new, higher-CFM unit on a dedicated ductwork run to the roof. The existing single-pane window is being removed for a frameless glass shower enclosure. You must pull a full permit. The city requires a stamped plumbing plan showing the new trap locations and trap-arm angles (IRC P2706 allows trap arms at 45 degrees or shallower with 1/4-inch drop per foot; if your trap run exceeds 3 feet, it must be verified on the plan). The shower waterproofing assembly must be specified on the plan—cement board + membrane, prefabricated pan, or equivalent. The exhaust fan CFM rating (typically 80–150 CFM for a 40 sq. ft. bathroom per Title 24) must match the ducting size and termination point (roof or exterior wall). A stamped electrical plan showing a new 20-amp dedicated circuit for the fan and GFCI protection on all receptacles is required. Permit fee: $400–$600. Plan review: 3–4 weeks (expect 1 to 2 rounds of corrections for waterproofing detail or trap-arm geometry). Inspections: rough plumbing (after drains installed, before walls closed), rough electrical (before drywall), framing (optional if no walls moved), and final. Total timeline: 8 to 12 weeks from permit issuance to occupancy. Total project cost: $12,000–$25,000. Lead-paint disclosure applies (pre-1978 homes); RRP certification required for any paint disturbance.

Scenario C

Adding a second bathroom—Los Gatos hillside addition, new plumbing stack

You are adding a second bathroom to your Los Gatos hillside home (Climate Zone 5B, 2,000+ feet elevation). The new bathroom is in a new addition that requires a new plumbing vent stack, new main drain connection to the sewer lateral, new water supply lines, and new electrical service. This is substantially different from a remodel of an existing bathroom and triggers a full Title 24 energy compliance review, seismic bracing requirements for the water heater (California code mandates bracing in seismic zones), frost-protection considerations (the hillside location may have 12–30 inches of frost depth, affecting any below-grade plumbing), and a full architectural/structural plan set. Permit fee: $800–$1,500 (based on estimated construction cost, typically $20,000–$40,000 for a 50 sq. ft. bathroom addition). Plan review: 4 to 6 weeks (longer due to structural and seismic components). Inspections: foundation/footing, framing, rough plumbing, rough electrical, rough HVAC (if applicable), drywall, and final (7+ inspections). Lead-paint disclosure applies. RRP certification required if pre-1978. This scenario also triggers a Soils Report requirement in some hillside zones—check with Los Gatos Planning Department. Total timeline: 12 to 16 weeks from permit to occupancy. Total project cost: $25,000–$45,000. Note: this is NOT a simple bathroom remodel; it is an addition and follows a different code path. If you are only remodeling the existing bathroom (even if it is a full gut), use Scenario B logic. If you are adding a new bathroom, coordinate with the Planning Department for zoning compliance (lot coverage, setbacks, etc.) before pulling permits.

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Shower waterproofing: why Los Gatos inspectors focus here, and what the code requires

Los Gatos Building Department stops more bathroom rough inspections for waterproofing defects than any other issue. The reason is liability: a failed or missing waterproof membrane behind shower tile leads to water intrusion into framing, causing rot, mold, and structural damage that can cost $10,000–$50,000 to remediate. California Title 24 and IRC R702.4.2 require a continuous, water-resistant membrane (minimum 15-mil polyethylene, or a commercial waterproofing system like Schluter-KERDI or equivalent) behind all tile in shower/tub areas. The membrane must extend a minimum of 6 inches above the tub rim or, for a shower enclosure, 12 inches above the finished floor (top of curb or base). Many contractors and DIYers use cement board as a tile backer (which is correct), but they skip the membrane layer behind it, assuming the cement board itself is waterproof—it is not. Cement board is water-resistant, not waterproof; water will eventually wick through cement board and into the framing behind.

When submitting your bathroom permit plan to Los Gatos, you must specify the waterproofing assembly in writing. Do NOT assume the inspector will infer it. Common language: 'Shower enclosure: cement board + KERDI membrane + porcelain tile, sealed with silicone caulk at corners and penetrations.' If you are using a prefabricated acrylic or fiberglass pan with a tile surround, specify the pan brand and tile assembly. If you are using a linear drain or curbless shower, specify the slope (minimum 1/8-inch drop per linear foot toward drain) and the membrane system. The inspector will request to see the rough waterproofing (before tile) during the rough inspection; they will look for the membrane, verify seals at corners, check for gaps around the drain or any rough-in penetrations. If the membrane is missing or poorly sealed, the inspector will issue a correction notice and mark the inspection FAILED; you must remove tile, install the membrane, and re-inspect before proceeding. This delay costs $1,500–$3,000 in rework and typically adds 2 to 3 weeks to the timeline.

For a tub-to-shower conversion specifically, Los Gatos requires a rough plumbing inspection to verify the old tub drain is capped or rerouted (you cannot leave an orphaned drain capped inside the wall with tile over it). The new shower pan must have a visible trap (not hidden under a finished floor), and the pan must have a 2-inch lip curb (or the floor must be sloped at 1/8-inch per foot) to contain water. Many DIYers forget to build the curb or slope, resulting in a failed rough inspection. Plan for an extra $500–$800 in labor and materials if you get this wrong.

Los Gatos online permit portal: how to submit and why the process takes longer than you expect

Los Gatos Building Department uses an online permit portal (administered through a third-party system such as MuniGov or similar; exact platform name varies—check the city website or call ahead to confirm). This means you CANNOT walk up to City Hall with a sketch and get a permit issued same-day. You must create an online account, upload all required documents (plans, forms, proof of property ownership or authorization letter), pay the permit fee online, and submit. The system then assigns your permit to a plan reviewer, who has 2 to 5 weeks to review the plans and either approve or request revisions via email. If revisions are requested (common for fixture-relocation projects), you must resubmit the corrected plans, and the clock resets for another review cycle. This process can stretch to 8 to 12 weeks if there are multiple revision cycles.

Required documents for a Los Gatos bathroom remodel permit: (1) Completed permit application form (fillable PDF from the city website). (2) Site/floor plan showing existing and proposed fixture locations, dimensions, and measurements. (3) Plumbing plan if fixtures are relocating (showing new drain runs, trap locations, vent stack connection). (4) Electrical plan if adding circuits or replacing GFCI (single-line diagram showing panel, circuits, GFCI locations). (5) Elevation or detail drawing of the shower/tub waterproofing assembly if converting from tub to shower. (6) Exhaust fan spec sheet and ductwork routing diagram if adding/replacing fan. (7) Energy Compliance Form (Title 24 certificate; the city provides a template). (8) Proof of property ownership (deed, property tax bill, or recent escrow document). (9) Proof of authorized occupant status if you are not the owner. For projects with stamped plans (fixture relocation, new exhaust, waterproofing detail), you must upload plans stamped by a licensed architect or engineer in California; the city does NOT accept unstamped sketches for substantial projects.

After you submit, the online portal generates a tracking number and sends a confirmation email. You can log in anytime to see the status of your application and download any correspondence from the plan reviewer. When revisions are requested, they arrive as a PDF with redlined notes; you download the PDF, make corrections, re-upload the corrected plans, and resubmit. Some applicants are surprised to learn that the portal does not accept verbal clarifications or phone calls as responses to reviewer comments; all communication is asynchronous and documented in writing. This is intentional (protects both the applicant and the city) but can feel slow. Plan for email turnaround times of 2 to 3 business days between your submission and the reviewer's response.

City of Los Gatos Building Department
Los Gatos City Hall, 110 East Main Street, Los Gatos, CA 95030 (address subject to change—verify on city website)
Phone: (408) 354-6877 (Building Department direct line—verify locally; main city line is (408) 356-2221) | Los Gatos Online Permit Portal (access via https://www.losgatosca.gov/building-permits or search 'Los Gatos CA building permit portal' for current URL)
Monday–Friday, 8:00 AM–5:00 PM (Pacific Time); closed on weekends and City holidays

Common questions

Do I need a permit to replace my bathroom vanity and faucet in the same location?

No, not if the vanity and faucet are in their original locations and you are not moving any plumbing lines or adding new drains. Replacing a vanity cabinet or faucet in place is considered maintenance and is exempt from permitting under California code. However, if you remove the old vanity and discover water damage or mold in the wall framing, you may want to consult a contractor about repair costs—though that repair work is also exempt from permitting if it does not change the footprint of the bathroom or add structural components.

Can I do my bathroom remodel myself, or do I need to hire licensed contractors?

California Business & Professions Code § 7044 allows owner-builders (property owners) to pull permits and perform work on their own property without a contractor license. However, any electrical work (adding circuits, installing outlets, replacing fixtures) must be performed by a California-licensed electrician, and any plumbing work (moving drains, relocating fixtures, or installing new supply lines) must be performed by a California-licensed plumber. You can handle demolition, framing, tile, and finishes yourself, but the licensed trades are mandatory. If you plan to do the work yourself, verify that your homeowner's insurance covers owner-builder work; many policies exclude it.

How long does a full bathroom remodel permit take from start to finish?

For a simple fixture-relocation project with no major structural changes, expect 4 to 8 weeks from permit submission to final inspection, assuming no correction notices. If the city requests revisions (common for waterproofing or electrical specs), add 2 to 4 weeks per revision cycle. From the date your final inspection passes, you can immediately occupy the space. If you are adding a new bathroom (vs. remodeling an existing one), the timeline stretches to 12 to 16 weeks because you must coordinate with Planning for zoning compliance and structural review.

What happens if the inspector fails my rough inspection?

The inspector will issue a correction notice detailing what must be fixed (e.g., 'Waterproofing membrane not visible at tub curb,' 'GFCI receptacle missing on circuit,' 'Exhaust duct not routed to exterior'). You have a set timeframe (usually 14 days, check the notice) to correct the deficiency and request a re-inspection through the online portal. Re-inspections are usually scheduled within 2 to 3 business days. If you cannot correct the issue within the timeframe, the permit may be deemed abandoned, and you will need to pull a new permit (and pay fees again) to resume work.

Is my pre-1978 bathroom remodel subject to lead-paint rules?

Yes. If your home was built before 1978, any work that disturbs painted surfaces (scraping, sanding, demolition, removal) is subject to EPA lead-paint renovation, repair, and painting (RRP) rules (40 CFR Part 745). You must use an EPA-certified RRP contractor, or you must be certified yourself. The building inspector may ask to see proof of RRP certification, and failure to comply carries federal penalties of $15,000–$37,500 per violation. This rule applies even if the painted surface is not visible (behind cabinets, inside walls, etc.).

How much does a bathroom remodel permit cost in Los Gatos?

Permit fees in Los Gatos are calculated as a percentage of estimated construction cost (typically 1.5–2%) and usually range from $200 to $800 for a full bathroom remodel. A $15,000 project might cost $225 in permit fees; a $40,000 project might cost $600–$800. There are also plan-review fees ($75–$150) and inspection fees. Call the Building Department or check their fee schedule online to confirm exact amounts, as fees can change annually.

Can I convert my bathtub to a shower without a permit?

No. Converting a bathtub to a shower (or vice versa) is considered a change to the waterproofing assembly and requires a permit. You must show a new shower pan with proper waterproofing (cement board + membrane, prefabricated pan, or equivalent), trap location, and curb or slope. The inspector will require a rough plumbing inspection to verify the assembly before tile is installed. Attempting this without a permit risks failed inspection upon discovery, forced removal, and re-work costs of $2,000–$5,000.

Does my new exhaust fan need to be ducted to the roof, or can it go into the attic?

It must be ducted to the exterior (roof or exterior wall), not into the attic. California Title 24 and IRC M1505 require exhaust air to be discharged outside. Ducting to the attic or into the crawl space violates code and will fail inspection. Insulated ductwork is recommended, especially in hillside or higher-elevation Los Gatos homes, to prevent condensation buildup in the duct.

What if I complete my bathroom remodel without a permit and want to sell my house?

You will be required to disclose the unpermitted work on the Transfer Disclosure Statement (TDS) when you list the house. Buyers routinely negotiate a 3–8% discount on sale price or demand that you obtain retroactive permits and pass final inspection before closing. Alternatively, you can attempt to get a retroactive permit from Los Gatos, but the building department may require you to remove finishes (tile, drywall) to allow inspection of framing, plumbing, and electrical work. This is expensive and time-consuming. It is far better to obtain the permit upfront.

Do I need a soils report for a hillside bathroom remodel in Los Gatos?

If you are remodeling an existing bathroom (interior-only work, no foundation or grading changes), a soils report is not required. If you are adding a new bathroom in an addition that requires new foundation or grading work, Los Gatos Planning or Building Department may require a preliminary soils report (cost $500–$1,500) to assess slope stability and frost depth. Check with the department before planning a hillside addition.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Los Gatos Building Department before starting your project.

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