Low Water Pressure in San Mateo, CA

Outside tap mounted on a house wall, the fixture closest to the incoming supply

PressureTrace is a referral service, not a plumbing contractor. We connect homeowners with independent contractors. Contractors are required to hold whatever credential their state or municipality demands. Every state page sets out who licenses plumbers there and where to check, so you can confirm before work begins. We do not perform plumbing work, we do not set prices, and we never charge homeowners anything — the contractors in our network pay us when we route them a call.

San Mateo has 53,985 occupied homes across 4 ZIP codes, and the typical one was built in 1964. That year is the most useful single fact for working out why the water pressure is weak, because it predicts what the supply pipe is made of.

San Mateo sits 7 years older than the CA median of 1971. Of the 257 CA towns we route calls in, its housing is older than 74% of them, and by number of homes it ranks 22nd.

What 1964 tells you about the pipe in San Mateo

Housing of this vintage generally means the changeover years. Copper is common by now but galvanized is still in the ground and in the walls, so what matters is not the build year but which sections were ever replaced. A pressure test at the outside tap tells you more than the age does. More on 1960s supply pipe.

52% of occupied homes in San Mateo are owner-occupied, 11 points below the CA figure of 63%. It matters here because the run between the meter and the house belongs to the property owner, not the utility.

Median household income across San Mateo ZIP codes is $179,754, 72% above the CA median of $104,737.

Before calling anyone in San Mateo, check whether every tap is weak or just one. Normal supply is 45–80 psi and under 40 psi is low — how to test it in a minute. Whole house is a supply problem worth a call; one tap is usually a five-minute job you can do yourself.

Build year and occupied homes by ZIP code in San Mateo

ZIP	Typical build year	Occupied homes
94401	1964	13,086
94402	1958	9,944
94403	1965	16,372
94404	1977	14,583

Nearby towns we cover

Daly City typical build 1965 · same era
Millbrae typical build 1960 · 4 years older
Pacifica typical build 1966 · same era
San Bruno typical build 1961 · 3 years older
South San Francisco typical build 1963 · same era
San Francisco typical build 1943 · 21 years older

Worth reading for a 1964-era home

ZIP codes we route in San Mateo

94401
94402
94403
94404

Low water pressure help near me in San Mateo

Give us your San Mateo ZIP code and what is happening. We check it against partner coverage and connect you with an independent contractor covering that area. We do not do the work and you are never charged.

Call (866) 838-2750