San Mateo, CA
Homes in 94403: what they're like and what they need
Quick answer
Half of the 17,799 homes in 94403 (San Mateo) were built before 1965, and 70% before 1980. Gas heats 60% of them, and owners live in 53%. Homes like these usually need a panel check before adding an EV charger or heat pump, earthquake bolting and bracing, and lead-safe painting and remodeling.
Updated November 2026 · Sources: US Census ACS 2020-2024
A plain-English report on the 17,799 homes in ZIP 94403, from public Census and city data, with the repairs and upgrades homes like these usually need.
1965
Typical home built
70%
Built before 1980
60%
Heat with gas
53%
Owner-occupied
What homes in 94403 usually need
Electrical panel check before an EV charger or heat pump
70% of homes here were built before 1980, when panels were often sized for much less load. Check yours before adding big electric items.
Earthquake bolting and bracing
Houses built before 1980 on raised foundations are the ones California's Earthquake Brace + Bolt program offers grants for. Check whether your home qualifies.
Lead-safe painting and remodeling
About 67% of homes here are older than 1978. Painters and remodelers working on them must follow EPA lead-safe rules (RRP certification).
Gas furnace to heat pump
60% of homes in 94403 heat with gas. A heat pump replaces the furnace and adds AC, and local utility rebates often cover a large share.
Older pipes and sewer lines
43% of homes here are from the 1950s or earlier, when galvanized supply pipes and clay or cast-iron sewer lines were common. A camera inspection of the sewer line is cheap insurance.
Roof and gutters before the rains
Half the homes here were built before 1966. Most roofs last 20-30 years, so many are on their second or third. Clean gutters and a roof check before winter storms prevent most leaks.
When homes in 94403 were built
47% are detached houses. 36% heat with electricity. Median owner-reported value: $1,746,300.
Rebates for 94403 homes
- WestLight Energy rebates (WestLight Energy (San Mateo County electricity provider, formerly Peninsula Clean Energy))
- BayREN home energy programs (Bay Area Regional Energy Network (9 Bay Area counties))
- Switch Is On incentive finder (Statewide (California))
Permits in San Mateo
Which projects need a permit, how long it takes and where to apply.
San Mateo permit checkerPros serving San Mateo
- Plumbers in San Mateo
- Heating & AC Contractors in San Mateo
- Electricians in San Mateo
- Handyman Services in San Mateo
- Roofers in San Mateo
- Pest Control Companies in San Mateo
- Painters in San Mateo
- Landscapers & Tree Services in San Mateo
- General Contractors in San Mateo
- Solar Installers in San Mateo
Need something done in 94403?
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Get a proQuestions about homes in 94403
- How old are the homes in 94403?
- Half of the 17,799 homes in 94403 (San Mateo) were built before 1965, so the typical home is about 61 years old. 70% were built before 1980 and 16% since 2000.
- How do homes in 94403 heat?
- 60% heat with gas and 36% with electricity. Gas-heated homes are the ones heat pump rebates are aimed at.
- Are most homes in 94403 owned or rented?
- 53% are lived in by their owners and 47% are rented. 47% are detached single-family houses.
- What is the median home value in 94403?
- The Census estimate of the median owner-reported home value in 94403 is $1,746,300 (2020-2024 average).
For local pros: trades that fit 94403
Compared with the other 162 ZIPs SVHN serves, homes here are among the best fits for:
- Movers #16
- Real Estate Agents #28
- Property Management #30
- Remodeling #32
- Plumbing #37
Run a home-service business? SVHN's free Market Finder ranks every ZIP for your trade
Other San Mateo ZIPs
Housing figures: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates for ZIP code tabulation area 94403 (estimates, via Census Reporter). "What homes usually need" is general guidance based on home age and heating type, not an inspection of any home.
