Town of Atherton, CA Building Permit Guide

Permit Authority

The portal confirms Atherton records are for properties within Town limits and advises confirming address-in-bounds before searching (https://athr-trk.aspgov.com/eTRAKiT/).

Department

Town of Atherton Building Department

Address

80 Fair Oaks Lane, Atherton, California 94027

Phone

650-752-0560 (Building Department); 650-752-0542 (inspection requests); 650-752-0500 (Permit Center)

Email

buildingdept@ci.atherton.ca.us

Website

https://www.athertonca.gov/147/building

Online Permit Portal

Application Process

1. Prepare a complete building permit application package (signed plans, calculations, studies, and owner/contractor information).
2. For new submissions use the Building Department new/online ePlan link; existing permit holders use the existing case link.
3. At plan check submittal time, include complete Building Permit Application + Square Footage Worksheet + complete plan set and required specialist documents.
4. Submit required contractor/license/approval materials and any required permits before issuance; plan check comments are not released until fees are paid.
5. If submitted plans are incomplete, they may be returned for re-submittal.
6. If permitted work needs correction, use revision/deferred submittal process and include signed revised documents.

Typical processing time: No posted standard intake-to-review timeline is visible on the town’s permit pages.

Source: Town of Atherton Building Department

General Requirements

- Most building-related work on private property requires permit and separate planning/building applications by structure; separate permits are required for detached structures, demolition, grading/drainage, photovoltaic systems, landscape screening, and similar items. - Structures above 6 inches above grade generally need review; some small structures are specifically exempt (see Exempt Work). - Required documents at permit submittal: - Signed Building Permit Application form, and signed construction documents/plans (design professional signatures required on plans, studies, calculations). - Owner/builder disclosure when owner-builder is used; signed and returned before permit issuance. - Contractor information and licenses, plus worker compensation insurance data. - Required agency approvals and utility/impact notices where applicable (e.g., fire district, CalWater, school fees, BAAQMD demolition letter).

Permit validity

- Building permit applications expire after 180 days unless a one-time 180-day written extension is approved. - Reactivation and other expiration items are listed in the master fee schedule.

Building code

- Building Department references Title 24/California Building Code and Atherton Municipal Code. - Official Enforced Building Codes are 2022 California codes for applications on/after January 1, 2023.

Owner-builder

- Town requires completion and return of Owner-Builder Disclosure and Authorization form before permit issuance; owner verification (driver’s license/notarization or equivalent) is required.

Contractor requirements

- A Town of Atherton business license is required for the primary contractor before permit issuance; subcontractor list required before final inspection.

Fees

Minimum permit fee

Not a single flat minimum is shown; fees are largely valuation-based and sometimes flat-by-work-type.

Plan check fee

- Building permit work is plan-check based on valuation and category; MP&E and other specialty permit categories have explicit fixed plan check fees.

Permit fee formula

- Valuation-based fees (per SF or permit category) are used for most building work. - Many permits also carry flat review/inspection fees and additional plan check/inspection add-on fees.

Reinspection fee

- Reinspection/additional inspections beyond normal: $290. - Additional administrative/penalty enforcement fees are by staff hourly rates.

Payment note

- No credit cards accepted; payment can be made in person or by mail. - Plan check comments and approvals are released only after required fees are paid.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

• - One-story detached tool/storage sheds up to 120 sf (may still require other approvals). - Fences (with height/location limits). - Small retaining walls, certain small tanks, sidewalks/driveways within thresholds. - Decks not exceeding 200 sf and limited height conditions. - Limited electrical/ mechanical/ plumbing minor repair categories and simple finish work. - Other items listed in Town’s "Work Exempt from Building Permit Requirements" handout.

Important: - Exempt from building permit does not mean exempt from Planning/Public Works or other agencies. - Many exempt-style jobs can still trigger planning, right-of-way, tree, or utility reviews. - Any permit requirements may still apply in right-of-way, encroachment, or heritage-tree situations.

Inspections

How to Schedule

• (650) 752-0542 (phone)
• 650-752-0561 (phone)

Scheduling deadline

- Provide permit number(s), address, inspection request description, requester name, and job-site phone. - Keep approved plans/job card and person present at site. - Lead-time rule: requests before 2:00 PM on prior business day are usually scheduled for next day. - Final inspections may require landscape screening/grading-drainage/encroachment/Menlo Park Fire and subcontractor-list sign-offs.

Time windows

- Morning inspections: 8:00 AM–12:00 PM. - Afternoon inspections: approx. 1:00 PM–4:00 PM. - Permit Center staff intake: 8:00 AM–11:00 AM and 1:00 PM–4:00 PM.

Typical inspection sequence: - Provide permit number(s), address, inspection request description, requester name, and job-site phone. - Keep approved plans/job card and person present at site. - Lead-time rule: requests before 2:00 PM on prior business day are usually scheduled for next day. - Final inspections may require landscape screening/grading-drainage/encroachment/Menlo Park Fire and subcontractor-list sign-offs.

Additional Resources

• Building code: - Building Department references Title 24/California Building Code and Atherton Municipal Code. - Official Enforced Building Codes are 2022 California codes for applications on/after January 1, 2023.
• Zoning information: View zoning info
• Permit Applications Fees Forms
• Submittal Checklist
• General Building Information
• Construction Hours Inspection Informatio
• 15
• License lookup guide: California Contractor License Requirements
• Contract template: California Homeowner-Contractor Agreement

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