San Mateo County Contractor List With Phone Numbers: Fresh Bay Area Permit Leads (2026)
San Mateo County's unincorporated permit feed sits in the heart of the Bay Area peninsula. PermitGrab tracks 303 county permits filed in the last 90 days through June 19, 2026, with 87 distinct contractor phone numbers — about 29% coverage, one of the better rates among California county feeds.
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View San Mateo County leads →San Mateo County runs down the Bay Area peninsula between San Francisco and Silicon Valley, and its unincorporated permit feed is high-value, high-property-value work that rarely surfaces on national lead platforms. PermitGrab indexes 303 San Mateo County permits filed in the last 90 days (through June 19, 2026) and pulls 87 distinct contractor phone numbers from that feed — roughly 29% phone coverage, among the stronger rates of any California county we track.
What the County Contractors Are Doing
The mix skews toward higher-ticket residential improvement work, which fits the peninsula's housing market:
- Residential additions and alterations. The dominant category — additions, ADUs, and substantial remodels on expensive peninsula homes.
- Re-roofs. A steady roofing channel across the county.
- Building permit revisions. Active, in-progress projects being amended — a signal the job is live right now.
Why 29% Coverage Matters Here
Roughly three in ten San Mateo County permits carry a contractor phone — well above what most county feeds deliver — and the work behind them is high-value addition and remodel jobs on the peninsula. A supplier or sub reaching those 87 active contractors is reaching shops doing premium residential work in one of the country's most expensive housing markets. Because the feed is current to within a day, the revisions and new additions are live jobs, not stale records.
Who Should Work San Mateo County
Remodel and addition specialists, GCs, and ADU builders own the addition/alteration feed; roofing crews work the re-roofs; subs of every trade watch the permit revisions for active projects to bid; and suppliers and service vendors use the contractor numbers to reach peninsula shops doing high-ticket work.
How PermitGrab Delivers It
San Mateo County permits ship in one daily feed, newest-first, with permit type, address, filing date, and contractor contact where published. One flat monthly price covers the county and every other market we track — no per-lead fees. Size the opportunity with our free permit lead estimator, then see plans and start working fresh San Mateo County leads.