The Demolition Permit Process: Requirements & Costs in San Mateo County
Every month a teardown sits waiting on a demolition permit, you are paying carrying costs, so the instinct is to look for a number: how many days does this take? Peninsula cities do not publish demolition processing-time standards, and neither do we. What they do publish is the list of reviews that can attach to a demolition, and those are what actually decide your schedule. This guide walks the requirements that apply in Palo Alto, Menlo Park, and Millbrae, each one cited to the city rule it comes from.
On timelines: the permit records AddressIntel ingests carry an issued date, not an application date, so we cannot measure how long a city took to issue a permit and we do not estimate it. Where this page gives a number, it is a published requirement from the source named next to it, not a processing time.
1. Palo Alto: Historic Review Is the Swing Factor
Palo Alto is the most review-heavy of the three, and the trigger is the age of what you are tearing down. The city’s Historic Resources Review bulletin states that a Historic Resource Evaluation (HRE) may be required where a discretionary application proposes demolition, new construction, or an addition and the existing development is more than 45 years old. Note that threshold: the widely repeated “50 years” figure is the federal rule of thumb for National Register eligibility, not Palo Alto’s own trigger.
Demolition of designated and contributing buildings is governed separately by PAMC ch. 16.49. Practically, if the house predates 1980 you should assume the question of historic significance will be asked, and that answering it is a study with its own schedule rather than a checkbox on the application.
2. Menlo Park: Heritage Trees
Menlo Park’s constraint is usually not the building, it is what is growing next to it. Under Menlo Park Municipal Code ch. 13.24, a heritage tree is any tree whose trunk circumference is 47.1 inches or more, measured 54 inches above natural grade. California native oaks qualify at a lower threshold of 31.4 inches, so an oak that looks unremarkable can still be protected.
If your footprint or your demolition staging area affects one, the work needs an arborist report and a heritage tree removal permit, and the city can condition the demolition on protecting the tree through the machinery phase. Walk the lot and measure the trunks before you price the job; this is the Menlo Park constraint most often discovered late.
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3. Millbrae: Slope, Grading, and a Coverage Caveat
A disclosure first: Millbrae is not one of the cities in the AddressIntel permit feed. We hold no Millbrae permit records, so nothing on this page about Millbrae is derived from our data. What follows is from the city’s own published material.
Millbrae requires a building permit to demolish a structure, and the city’s fee list treats plan check, permit, construction and demolition deposits, utility capacity, and impact fees as separate charges on the same job. Millbrae Municipal Code ch. 9.45 (Grading), which amends California Building Code appendix ch. 33, sets the grading permit requirements and allows the city to require geotechnical investigation reports and engineering geology reports.
That last point is the one that matters for the bay-view hillside lots that make up much of Millbrae’s teardown inventory: on a slope, a demolition is realistically a grading review as well, with a soils report attached. Confirm scope with the Building Division before you underwrite the schedule.
4. Prerequisites Every Teardown Shares
Whichever jurisdiction you are in, the demolition permit fee is usually the smallest line item. The real costs and the real schedule risk sit in the prerequisites:
- Asbestos notification and abatement: under BAAQMD Regulation 11, Rule 2, the air district must be notified at least 10 business days before a demolition, and the J number issued on that notification is the proof it was made. Residential buildings of four or fewer dwelling units may notify 72 hours ahead instead, for an additional fee. The dates on the J number are firm work dates, so a slipped start has to be amended.
- Utility disconnects: PG&E must cut power and gas to the property. No city rule governs how long that takes, and it is the least predictable item in the sequence.
- Tree protection: where a protected tree is nearby, expect a cash bond held until the tree survives the demolition, plus the arborist report behind it.
Frequently Asked Questions
How long does it take to get a demolition permit in Palo Alto?
There is no published Palo Alto processing-time standard for demolition permits, and we do not publish an estimate: the permit records AddressIntel ingests carry an issued date only, not an application date, so a true application-to-issuance duration is not something our data can measure. What is documented is the biggest swing factor. Palo Alto may require a Historic Resource Evaluation when a discretionary application proposes demolition and the existing development is more than 45 years old, per the city's Historic Resources Review bulletin, and most Peninsula teardown stock clears that age.
What slows down a Menlo Park demolition?
Heritage trees, most often. Under Menlo Park Municipal Code ch. 13.24 a heritage tree is any tree with a trunk circumference of 47.1 inches or more, measured 54 inches above natural grade, and for California native oaks the threshold is lower at 31.4 inches. If your building footprint or demolition staging area affects one, the project needs an arborist report and a heritage tree removal permit before work proceeds. Menlo Park publishes no processing-time standard for this, so budget for the review rather than for a specific number of days.
Are demolition permits faster in Millbrae?
We cannot say, and we would rather tell you that than guess. Millbrae is not one of the cities in the AddressIntel permit feed, so we hold no Millbrae permit records to measure and publish no Millbrae timeline. What the city does document: a building permit is required to demolish a structure, and Millbrae Municipal Code ch. 9.45 (Grading), which amends California Building Code appendix ch. 33, allows the city to require geotechnical investigation and engineering geology reports on a grading permit. Many Millbrae teardown lots sit on bay-view slopes, so a hillside demolition is realistically a grading review as well as a demolition review.
What does a demolition permit actually cost in San Mateo County?
The permit fee itself is usually the smallest line item; Millbrae, for example, lists plan check, permit, construction and demolition deposits, utility capacity, and impact fees as separate charges on one job. The larger costs are the prerequisites: BAAQMD-regulated asbestos survey and abatement, PG&E power and gas disconnects, and cash tree-protection bonds where a protected tree is nearby. Fee schedules are set per city and change, so price a specific job off that city's current schedule rather than a regional rule of thumb.
How far ahead do I need the BAAQMD asbestos notification (J number)?
Under BAAQMD Regulation 11, Rule 2 the air district must be notified at least 10 business days before a demolition, and the J number is the proof that notification was made. Residential buildings of four or fewer dwelling units can notify 72 hours ahead instead, with payment of an additional fee. The dates on the J number are treated as firm work dates, not estimates, so a slipped start date has to be amended rather than ignored.
Why does the age of the house slow down my demolition permit?
Because age is what triggers historic review. In Palo Alto, a Historic Resource Evaluation may be required where a discretionary application proposes demolition and the existing development is more than 45 years old; PAMC ch. 16.49 governs historic preservation and demolition of designated and contributing buildings. Since the bulk of the region's teardown stock predates 1980, this review is the single biggest unknown in a holding-cost schedule.
What approvals do I need before the city will accept my application?
Cities generally want the prerequisites lined up first: a BAAQMD asbestos/lead abatement J number, PG&E utility disconnects for power and gas, and a tree-protection bond where protected trees are nearby. PG&E disconnect timelines are the least predictable of the three and are not governed by any published city standard.
Sources
Every requirement above traces to one of these. Municipal codes and fee schedules change; confirm against the current version before relying on it for a live project.
- BAAQMD, Asbestos Demolition & Renovation (Regulation 11, Rule 2)
- City of Palo Alto, Historic Resources Review information bulletin
- Palo Alto Municipal Code ch. 16.49, Historic Preservation
- Menlo Park Municipal Code ch. 13.24, Heritage Trees
- Millbrae Municipal Code ch. 9.45, Grading
- City of Millbrae, Building Permit
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