Summary
- Location
- Foster City, San Mateo County, California, USA
- Accepted plans
- 4 accepted plans
- Providers
- 1 provider
- Origin programs
- 1 program
- Plan size range
- 400 to 800 sq ft
- Permit sources
- 1 source
City program
Pre-Approved ADU Plans in Foster City, California
Browse official and accepted pre-approved ADU plans for Foster City, California. Compare plan size, bedrooms, providers, approval status, official source links, permit requirements, and fees.
Program Overview
This Foster City page summarizes source-backed pre-approved ADU plan listings for Foster City, California, using official records tied to City of Foster City. The current public dataset lists 4 accepted plans from 1 provider; provider names include HEART / GLADUR. The accepted listings originate from Redwood City, San Mateo County, California, USA. Plan records cover 400 to 800 sq ft and studio to 2 bedrooms where those fields were listed by the source.
Permit and fee context is kept separate from plan acceptance. The public dataset includes 1 permit requirement record and 1 fee record for Foster City. Permit requirement records include Site-specific permit review. Fee records include Published plan cost. When a source did not publish a value, the page keeps that field as Not listed in source instead of filling a blank.
Use these listings as a starting point for matching a plan to a property. Source links, checked dates, acceptance notes, and provider records are shown so you can verify whether a plan remains accepted locally, what site-specific review remains, and whether local fees, plan licensing, or provider terms apply. A listing in this directory does not guarantee permit approval for a specific parcel.
How to use this page
- Pick a plan size and bedroom count.
- Check whether the plan originated locally or is accepted from another city/county program.
- Open the official source.
- Confirm current status with the local building department.
- Ask the provider what site-specific work, plan licensing, engineering, and utility review are still required.
Accepted Plans
4 plans Source-backed record Official city source
- Provider
- HEART / GLADUR
- Origin program
- Redwood City, San Mateo County, California, USA
- Accepted location
- Foster City, San Mateo County, California, USA
- Size
- 575 sq ft
- Bedrooms
- 1 bed
- Bathrooms
- 1 bath
- Last checked
- Aug 13, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official city source
- Provider
- HEART / GLADUR
- Origin program
- Redwood City, San Mateo County, California, USA
- Accepted location
- Foster City, San Mateo County, California, USA
- Size
- 745 sq ft
- Bedrooms
- 1 bed
- Bathrooms
- 1 bath
- Last checked
- Aug 13, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official city source
- Provider
- HEART / GLADUR
- Origin program
- Redwood City, San Mateo County, California, USA
- Accepted location
- Foster City, San Mateo County, California, USA
- Size
- 400 sq ft
- Bedrooms
- Studio
- Bathrooms
- 1 bath
- Last checked
- Aug 13, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official city source
- Provider
- HEART / GLADUR
- Origin program
- Redwood City, San Mateo County, California, USA
- Accepted location
- Foster City, San Mateo County, California, USA
- Size
- 800 sq ft
- Bedrooms
- 2 beds
- Bathrooms
- 1 bath
- Last checked
- Aug 13, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Permit Requirements
1 requirementSite specific
Site-specific permit review
Required before construction
- Last checked
- Aug 13, 2026
- Notes
- Pre-approved or pre-reviewed plans do not eliminate parcel-specific zoning, structural, foundation, utility, fire, energy, and permit review.
Fees
1 fee recordPublished city plans
Published plan cost
$0 / free plan
- Last checked
- Aug 13, 2026
- Notes
- Free plan access does not waive plan-check, permit, impact, utility, or professional costs.
Official Sources
1 sourceFoster City ADU / pre-approved-plan information
- Publisher
- City of Foster City
- Last checked
- Aug 13, 2026
Foster City ADU FAQ
6 answersDoes Foster City have accepted or pre-approved ADU plans in this directory?
Yes. The current Foster City, California page lists 4 accepted plans from 1 provider in the source-backed export.
What ADU plan sizes are listed for Foster City?
The listed Foster City plan records range from 400 to 800 sq ft. Use the individual plan cards to confirm bedrooms, bathrooms, plan documents, and provider details because some fields are not listed by every official source.
Where do the Foster City ADU plan records come from?
They are tied to 1 official source in this page's source set, including City of Foster City. Each plan, fee, and permit note should still be checked against the linked official source before use.
Can San Mateo County or nearby city ADU plans be used in Foster City?
This page includes plans accepted for Foster City that originated in Redwood City. That does not mean every San Mateo County or nearby city plan applies in Foster City; rely on the accepted-plan record and official source link for each listing.
Do pre-approved ADU plans guarantee permits in Foster City?
No. A source-backed accepted plan can reduce plan review work, but Foster City can still require site-specific review, zoning checks, fees, utility coordination, and current code compliance. This page lists 1 permit requirement to help flag items to verify with the local building department.
Are Foster City ADU permit fees and requirements listed?
This page includes 1 fee record and 1 permit requirement for Foster City. These are source-backed summaries, not a final permit quote or approval checklist.