Foster City, CA Building Permits & Teardown Predictor
We track every Foster City building permit, demolition filing, zoning change, and off-market transaction in one place, giving spec builders and developers a single feed of where the market is moving. Each permit is scored against lot value, structure age, and neighborhood comps to surface high-ROI teardown and new-build opportunities before they hit the MLS.
Related guides: Who tracks demolition & building permits in Silicon Valley? · Can you SB 9 lot-split in Foster City? Run the screener · How to estimate developer ROI on a teardown rebuild
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Why Developers Target Foster City
Foster City has seen a surge in “mansionization”, older, smaller homes on large lots demolished to build luxury spec homes. AddressIntel's algorithm identifies these aging properties from Floor Area Ratio (FAR), recent neighborhood comps, and permit velocity.
- Automated Demolition Cost Estimates
- New-Build Proforma ROI Generation
- Real-time Permit Webhooks
Foster City Market Metrics
| Permits Trackedall permits on file | 27 |
|---|---|
| Demolition Permitssince January 1, 2023 | 2 |
| New-Construction Permitssince January 1, 2023 | 0 |
| High-Probability Teardowns | 0 Active |
| Total Declared Permit Valueall permits on file | — |
Foster City & San Mateo County Building Permits
AddressIntel tracks 27 Foster City building permits as part of our San Mateo County building permits dataset, pulled from municipal sources and updated regularly. Whether you need to look up a single Foster City building permit for one address or scan San Mateo County building permits for teardown and new-construction activity, every filing is scored for developer ROI and teardown potential.
Working a teardown? See our guide to the demolition permit process, or learn who tracks Silicon Valley building permits and how San Mateo County permit data reaches developers.
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Recent Foster City Building Permits
The latest Foster City building permits and demolition filings, drawn from 27 permits we track for the city, pulled from municipal sources and updated regularly.
| Address | Type | Value | Issued |
|---|---|---|---|
| 350 TOPSAIL CT | BUILDING RESIDENTIAL - ROOF NEW_434 | — | 2026-09-10 |
| 924 GULL AVE | BUILDING RESIDENTIAL - REROOF_NA | — | 2026-09-08 |
| 1084 WINDJAMMER CIR | BUILDING RESIDENTIAL - BATHROOM REMODEL_434 | — | 2026-09-08 |
| 1314 TARPON ST | BUILDING RESIDENTIAL - REROOF_NA | — | 2026-09-02 |
| 1328 TARPON ST | BUILDING RESIDENTIAL - WINDOW REPLACEMENT_434 | — | 2026-09-01 |
| 1250 MARTINIQUE LN | BUILDING RESIDENTIAL - ALTERATION_434 | — | 2026-09-01 |
| 726 WIDGEON ST | BUILDING RESIDENTIAL - FOUNDATION REPAIR_NA | — | 2026-08-28 |
| 281 BEACH PARK BLVD | BUILDING RESIDENTIAL - REROOF_NA | — | 2026-08-27 |
Foster City Teardown & Permit FAQ
How many teardown opportunities are there in Foster City?
AddressIntel scores every Foster City property for teardown potential using lot value, structure age, and neighborhood comps; new opportunities are surfaced as they appear.
What is the typical developer ROI on a Foster City teardown?
We do not publish a single Foster City figure, because there is no honest one: returns swing on land cost, buildable envelope, and comps. Instead, every Foster City property page carries an interactive build-to-zoning proforma (purchase, demolition, construction at current costs, cost of sale against size-matched comps) so each lot is underwritten on its own numbers.
Where can I find recent Foster City building permits?
AddressIntel tracks Foster City building permits (27 permits currently on file), including new construction, additions, and demolition filings, pulled from municipal sources and updated regularly. See the recent permits table above for the latest activity.
How do I find demolition permits in Foster City?
AddressIntel tracks Foster City building and demolition permits (2 full-structure demolition permits since January 1, 2023), updated regularly from municipal sources.