Do I need a permit to remove a tree in San Mateo?

Many tree removals require a permit or approval; contact the City Planning Division to confirm permit requirements and submit any tree report or application listed on the Planning page.

How are floodplain or wetland projects reviewed?

Projects in flood hazard areas or affecting wetlands may need floodplain development permits, environmental review and mitigation; check municipal code standards and consult Planning early in design.

What happens if I put up a sign without a permit?

Unpermitted signs can trigger removal orders, fines and administrative citations; the City issues notices and enforces sign regulations through Planning and Code Enforcement.

San Mateo Bylaws: Floodplain, Wetlands, Trees, Signs

Land Use and Zoning California 3 Minutes Read · published March 01, 2026

San Mateo, California regulates floodplains, wetlands, historic resources, trees and signs through municipal ordinances, planning and building review. This guide summarizes the key local rules, who enforces them, how to apply for permits or variances, common violations, and practical steps for property owners and contractors in San Mateo.

Scope & Key Local Rules

The City of San Mateo enforces land-use and development standards that affect:

Floodplain and floodplain development controls.
Wetland setbacks and protections where local projects affect sensitive habitats.
Historic resources review when work affects designated structures or districts.
Tree protection rules for public and private trees including removal permits.
Sign permits and restrictions for commercial and temporary signage.

Many standards are implemented through the San Mateo Municipal Code and the City Planning and Building permit processes; read the municipal code for ordinance text and check Planning for procedural steps. San Mateo Municipal Code^[1]

Permits, Reviews and Land-Use Process

Typical projects require pre-application consultation, complete permit applications, and may need environmental review, historic review, tree permits, or grading/floodplain approvals depending on site conditions.

Apply for planning permits and historic review through the City Planning Division; check processing times and submittal checklists.
Building permits are required for structural work in flood hazard areas and for work affecting designated historic fabric.
Tree removal on private property may require an approved tree permit or replacement planting.

For application forms, fees and online submittal details, consult the Planning Division resources. City of San Mateo Planning Division^[2]

Penalties & Enforcement

Enforcement responsibility is split among the Planning Division, Building Division, Public Works and Code Enforcement depending on the violation type. Specific penalties and fines are set in the municipal code or implementing regulations; where amounts are not listed on the cited pages this guide notes that they are not specified on the cited page.

Monetary fines: amounts "not specified on the cited page" for many code violations in the general Planning pages; consult the Municipal Code for ordinance-specific fines.San Mateo Municipal Code^[1]
Escalation: the municipal process commonly allows warning notices, administrative citations, then higher fines or abatement orders for continuing offences; exact escalation ranges are not specified on the cited planning pages.
Non-monetary sanctions: stop-work orders, corrective permits, vegetation replacement, abatement, and referral to court for injunctive relief or civil enforcement are used.
Enforcers: Planning Division, Building Division, Public Works and Code Enforcement handle inspections, orders and administrative citations; complaints are filed via the City website or department contact pages.
Appeals and review: appeal routes typically go to the Planning Commission or to administrative appeal bodies; time limits for appeals vary by permit type and are "not specified on the cited page" for general guidance—check the permit notice or municipal code section for exact deadlines.

Administrative citations can escalate quickly if violations continue after notices.

Applications & Forms

Where to find forms and fees:

Planning permit and historic review application forms, checklists and fee schedules are published by the City Planning Division; if a specific tree-removal form or historic application number is required it will appear on the Planning Division pages cited above.City of San Mateo Planning Division^[2]
Fees: project fees and deposit schedules are listed with each application type; if a numeric fee is not shown on the referenced page it is not specified on the cited page.
Submission: many forms can be submitted online or in person to the Planning counter; check the Planning Division page for current submittal instructions.

Common Violations

Unpermitted tree removal or pruning without an approved permit.
Installing signs without a sign permit or in violation of size/location rules.
Development in floodplain or wetland buffer without required approvals or mitigation.
Altering or demolishing a designated historic resource without a permit.

Action Steps

Before work: contact Planning for a pre-application review to identify required permits and environmental checks.
Apply: submit complete permit applications with plans, tree reports, or historic documentation as required.
If cited: respond to notices promptly, request hearings or appeals within the stated appeal period on the notice.
Report: file complaints or request inspection through Code Enforcement or Planning.