What happens if you skip the permit (and you needed one)
- Stop-work orders and citation fines of $500–$2,000 per day in Millbrae; the city's code enforcement team actively inspects unpermitted kitchen work when reported by neighbors or discovered during title transfer.
- Insurance claim denial: your homeowner's policy will not cover damage from unpermitted work, and most insurers will not renew without a legalized permit if discovered.
- Title transfer delay or forced disclosure: California real-estate transaction law (Civil Code § 1102) requires disclosure of unpermitted work; buyers' lenders will require a permit or engineer's affidavit to close, costing $2,000–$5,000 to remedy after sale.
- Lender refinance block: any refinance application will trigger a title search that flags unpermitted alterations; lenders will demand legalization (retroactive permit + re-inspection) or will decline the loan.
Millbrae full kitchen remodel permits — the key details
Millbrae requires a full building permit for any kitchen remodel that includes wall relocation, plumbing fixture movement, new electrical circuits, gas-line changes, range-hood venting to the exterior, or window/door opening modification. The threshold is explicit in the city's municipal code and aligns with California Building Standards Code (Title 24), Section 101.2. If your project is cosmetic-only—replacing cabinets in place, swapping countertops, repainting, replacing flooring, or replacing an appliance without adding circuits or moving gas lines—no permit is required. However, most full kitchen remodels involve at least one of the triggering items above, so permits are the rule, not the exception. The City of Millbrae Building Department requires all three sub-permits (building, plumbing, electrical) to be filed and approved before any work can legally begin; you cannot phase the work by getting building approval first and then plumbing later.
Electrical work in kitchens is tightly regulated under California Electrical Code (based on NEC 2023 adoption), and Millbrae enforces these strictly. Per NEC 210.52(C), kitchens require a minimum of two small-appliance branch circuits (15A or 20A), each dedicated to counter receptacles. Every counter receptacle (spacing no more than 48 inches apart measured horizontally along the countertop edge) must be GFCI-protected per NEC 210.8(A)(6). Millbrae's permit review catches missing circuits and improper spacing on nearly every first submission; if your plan shows only one small-appliance circuit or receptacles spaced 52 inches apart, the review will reject it with a comment directing you to add a second circuit or reposition outlets. The range hood—whether it's a replacement or new installation—must be on its own dedicated 20A circuit if hardwired, and the ductwork termination to the exterior must be shown on the electrical plan with a detail drawing. Millbrae does not accept vague range-hood specifications like 'per manufacturer'—the termination location, duct diameter, and outdoor cap type must be specified and inspected.
Plumbing in Millbrae kitchens follows California Plumbing Code (based on IPC 2022), adopted locally with amendments. Any kitchen sink relocation requires a new supply stub (hot and cold) and a new drain line with proper trap and vent configuration. Millbrae code enforcement specifically checks for trap-arm length (IRC P3005.1 limits trap-arm to 24 inches) and proper slope (1/8 inch drop per foot); undersized vents or reversed slopes are the most common rejections on plumbing plans. If your remodel moves the sink more than 6 feet from the existing drain location, the plumbing inspector will likely require a new vent stack, which may involve roof penetration—plan review will flag this during the initial phase. The city does not allow wet-venting (combining toilet and sink drains) in residential kitchens, so a separate vent line to the roof is mandatory. Dishwasher connections are required to be on the hot-water supply line and must have an air-gap fitting (not a standpipe) per Millbrae's adoption of California Plumbing Code; this detail must be shown on the plumbing plan or the inspection will fail at the rough-in stage.
Gas-line changes trigger both building and mechanical review in Millbrae. If you are relocating or upgrading a gas range, moving a gas cooktop, or adding a gas line where one doesn't exist, a separate mechanical permit is required. Per California Mechanical Code § 507 (adopted by Millbrae), all gas lines must be sized per the appliance BTU load, pressure-tested before concealment, and fitted with shut-off valves accessible at the appliance and at the meter. Millbrae requires a licensed gas-fitter (C-16.1 or C-40.1 contractor) to sign off on all gas work; owner-builders cannot self-permit gas lines. The city's code also requires a gas-appliance connection diagram (showing line size, pressure regulator, flex-connector type, and shutoff-valve locations) to be included in the mechanical plan; vague language like 'gas line per code' will be rejected. Many Millbrae homeowners discover that their existing gas line is undersized for a new appliance and requires replacement—this discovery often happens during plan review, adding 1–2 weeks to the schedule.
Load-bearing wall removal is the permit element that most frequently stalls kitchen projects in Millbrae. If you are removing a wall to open the kitchen to a dining room or living area, the city requires a licensed structural engineer to sign and stamp a letter certifying the wall's load-bearing status and, if it is load-bearing, specifying the required beam size and support posts. This letter must be submitted as part of the building-permit application and cannot be obtained electronically—Millbrae requires the original wet-signed document from a California-licensed PE (Professional Engineer). The engineer's letter must reference the home's foundation type, soil conditions, and floor framing (joist sizes and spacing) to be complete. Millbrae building inspectors will not issue a framing inspection without this letter in hand. Once the permit is issued, the rough-framing inspection will verify that the beam is installed correctly (proper bearing length, adequate posts, no undersizing); this inspection is separate from the building final and often requires a second visit if the framing doesn't match the engineer's specification. Many homeowners budget 2–3 weeks for the engineer's letter alone, so this step should be started early in the permit process.
Three Millbrae kitchen remodel (full) scenarios
Millbrae's three-permit-simultaneous requirement and why it matters
Unlike some California cities that allow sequential permitting (plumbing first, electrical second), Millbrae requires all three sub-permits—building, plumbing, and electrical—to be filed together and approved together before any work begins. This means your architectural/MEP plans must be complete and coordinated before you walk into the Building Department. If your plumber and electrician haven't communicated about island placement, sink location, cooktop circuit routing, and vent-stack location, you will discover conflicts during plan review, requiring resubmittal and a restart of the review clock. Many homeowners and contractors underestimate this coordination requirement and submit incomplete plumbing plans (showing only the main sink, not the island fixture) or electrical plans that omit GFCI spacing details. Millbrae's first-review process gives one round of comments; after that, any resubmittal is treated as a new submission and review starts over.
The practical impact is that your design phase must happen before permit filing, not during it. Work with a kitchen designer or contractor who has experience with Millbrae permits and can coordinate all three trades' plans (or hire a draftsperson to prepare coordinated plans). The cost of this design coordination ($1,000–$2,500 depending on complexity) is often cheaper than resubmitting plans twice. Once all three permits are issued—typically 4–8 weeks after a complete initial submission—you can schedule the rough-inspection sequence and begin the work. If plans are incomplete on first submission, expect 8–12 weeks total to permit.
Millbrae's Building Department also requires that all permit holders (the homeowner, contractor, and subcontractors) sign the permit application in the presence of a Building Department staff member during the plan-review phase. Electronic signature or mailed signatures are not accepted. This means a trip to Millbrae City Hall is mandatory. The city's permit office is located at the main City Hall building, and hours are typically Monday–Friday, 8 AM–5 PM, but you should call ahead to confirm (Millbrae Building Department contact number can be found via the city's official website or by calling City Hall main line). Walk-in plan review is available, but appointments are strongly recommended and often book 1–2 weeks out during peak season (spring and summer).
Pre-1978 lead-paint disclosure and how it affects your timeline
If your Millbrae home was built before January 1, 1978, California Health & Safety Code § 1303.1 requires that you receive a lead-paint disclosure document before any work begins, not just during a real-estate transaction. The disclosure is a specific form (available from the California Department of Housing and Community Development) that you and your contractor must sign and acknowledge before filing the building permit. Millbrae's Building Department will not accept a permit application without evidence that the disclosure has been signed and dated. This adds 5–10 business days to the front end of the permit process because the form must be obtained, reviewed, signed (in ink), and scanned or photocopied for the permit file.
The lead-paint disclosure is separate from a lead-inspection or lead-remediation report. It is not saying your kitchen has lead paint, only that the home's age means it might. If you are concerned about lead presence, you can hire a lead-testing company ($500–$1,500 for a kitchen-specific test) to determine if lead is actually present. If it is present and you are disturbing painted surfaces (which kitchen remodeling typically does), California regulations require lead-safe work practices (use of HEPA vacuums, wet-wiping, containment). However, the Building Department does not require a lead abatement contractor for residential kitchens; your general contractor can perform lead-safe work if trained. Still, the disclosure form is mandatory for any permit filing in a pre-1978 Millbrae home, so budget time and a signed copy into your permit timeline.
Many Millbrae homeowners overlook this step because the disclosure is not a separate permit—it is just a form that must be submitted with the building-permit application. However, if you miss it, the Building Department will reject the entire application and request resubmission once the form is signed. This can delay your approval by 1–2 weeks, so address it early: obtain the form, have the homeowner and contractor sign it, and submit it with the permit package on day one.
Millbrae City Hall, Millbrae, CA 94030 (confirm exact street address and room number via city website or phone)
Phone: Call Millbrae City Hall main line or search 'Millbrae Building Department phone' for direct permit office number | https://www.ci.millbrae.ca.us/ (navigate to 'Permits' or 'Building Department' for online portal and application forms)
Monday–Friday, 8:00 AM–5:00 PM (verify holidays and seasonal hours on city website)
Common questions
Can I do a kitchen remodel myself without a contractor in Millbrae?
Owner-builders are allowed under California Business & Professions Code § 7044, but only for single-family residential projects where you own the property. However, electrical and plumbing work cannot be self-permitted by an owner-builder in Millbrae—those trades require a licensed C-10 (general) or C-36 (plumbing) or C-45 (electrical) contractor. You can pull the building permit yourself, but you must hire licensed trades for any electrical, plumbing, or gas work. Millbrae will not issue an electrical or plumbing sub-permit without a licensed contractor's signature on the plans.
How long does plan review take for a kitchen remodel in Millbrae?
Plan review typically takes 3–6 weeks from submission of a complete application. If your plans are incomplete (missing plumbing vent details, electrical circuit specifications, load-bearing wall engineering, or lead-paint disclosure), the first review will result in comment rejection, and resubmittal restarts the clock. Many projects end up taking 8–12 weeks total because of one round of comments. Walking in during initial plan review to discuss architectural intent with the reviewer can sometimes prevent comments, but this is not guaranteed. Millbrae's Building Department recommends calling ahead or using the online permit portal to check application status.
Do I need a structural engineer's letter if I am not removing any walls?
No. A structural engineer's letter is required only if you are removing, relocating, or significantly modifying a wall. If your kitchen remodel keeps all existing walls in place and only relocates fixtures (sink, cooktop, range hood), no structural engineering is needed. However, if you are opening up a wall for any reason—even a partial cutout for a cooktop island or range-hood ductwork—the Building Department will likely require an engineer to certify that the wall is not load-bearing. When in doubt, ask the Building Department before spending money on an engineer.
What is the permit cost for a kitchen remodel in Millbrae?
Permit costs in Millbrae are typically calculated as 1.5–2% of the estimated project valuation. A $25,000 remodel would cost approximately $375–$500 in combined permit fees (building + plumbing + electrical split). A $50,000 remodel would cost approximately $750–$1,000. Millbrae publishes a fee schedule on its website; you can also contact the Building Department for an estimate once you provide a project scope and valuation. Separate mechanical permits for gas-line work cost an additional $100–$300.
Can I change my kitchen layout during construction if I have a permit?
Not without a permit modification. If you want to move a sink, change a circuit, or relocate a gas line after the permit is issued, you must contact the Building Department and request a change-order or new permit addendum. Major layout changes may require a full new permit application and re-review. Minor changes (e.g., shifting a receptacle 12 inches left along the counter, changing cabinet color) may be allowed without formal modification, but structural changes, MEP relocations, or anything affecting inspections must be approved before work proceeds. It is less expensive to get the design right before filing than to modify during construction.
Do I need a permit if I am just replacing my appliances?
Not if the appliances are the same type and location. Replacing an electric range with a new electric range in the same spot, on the same circuit, requires no permit. Replacing a microwave with a new microwave requires no permit. However, if you are changing appliance type (e.g., gas range to electric, or vice versa), upgrading to a commercial cooktop, adding a dishwasher where none existed, or changing the location of an appliance, a permit is required. The key is: same type, same location, same circuit = no permit. Different type, location, or circuit = permit required.
What inspections are required for a kitchen remodel in Millbrae?
Kitchen remodels typically require 4–6 inspections depending on scope: (1) rough plumbing (before drywall covers drain lines and supply lines), (2) rough electrical (before drywall covers wiring and circuits), (3) framing or structural (if walls are moved or beams installed), (4) range-hood or mechanical (if gas or exterior ducting is added), (5) drywall (if walls are modified), and (6) final (after all work is complete and all fixtures are installed). Inspections must be scheduled at least 24 hours in advance by calling the Building Department. Each inspection takes 30–60 minutes. If an inspection fails, you must correct the deficiency and reschedule; delays here can extend the project timeline by 1–2 weeks.
Is Millbrae a seismic zone, and does this affect kitchen permits?
Yes, Millbrae is in a seismic zone (per USGS mapping and California Building Standards Code), and seismic bracing is required for certain kitchen elements. Any gas appliance (cooktop, range, water heater in the kitchen area) must be seismically braced per California Mechanical Code § 506. Flexible gas connectors and pressure regulators must be rated for seismic loads. This is enforced during the gas-line inspection. Additionally, if you are removing a wall or installing a new beam, the engineer's design must account for seismic loading per California Building Standards Code § 5000 (based on IBC 2022). This typically adds 10–15% to structural engineering costs but is mandatory and non-negotiable.
Can I use a draftsperson instead of an architect for kitchen permit plans?
Yes, but plans must be clear and complete. Millbrae does not require an architect's stamp for single-family kitchen remodels unless load-bearing walls are involved (in which case a structural engineer's stamp is required). A competent draftsperson or kitchen designer can prepare building, plumbing, and electrical plans that meet code. However, the plans must show all details required by Millbrae's checklist (circuit layouts, GFCI spacing, trap slopes, vent routing, range-hood termination, etc.). If plans are vague or incomplete, they will be rejected in review. Many kitchen designers in the Bay Area are experienced with Millbrae's requirements and can prepare permit-ready plans; this is often worth the extra cost to avoid resubmittal.
What if my kitchen remodel requires work in a historic district or overlay zone?
Millbrae has a historic district overlay in certain neighborhoods (primarily downtown and older residential areas). If your home is in a historic district, the Building Department may require additional review by the city's Planning or Historic Preservation staff. This can add 2–4 weeks to plan review. Changes to exterior appearance (exterior range-hood ducting, new windows, exterior wall modifications) may require historic-district approval or a conditional-use permit. Interior kitchen work is typically not subject to historic review unless it affects exterior features. Check your property's zoning on the Millbrae Planning Department website or by calling the city to determine if you are in a historic district before planning major exterior modifications.