COW HOLLOW · 94123 · AROUND OUR BASE

Concrete contractor in Cow Hollow

Cow Hollow is named for the dairy farms that grazed around a lagoon here in the 1800s. The lagoon was filled in long ago, and that history still shows up in the soil. The flat lower blocks toward Lombard Street sit near the edge of the Marina’s liquefaction zone, while the upper blocks climb hard toward Pacific Heights. One neighborhood, two different sets of concrete problems.

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SCOPE OF WORK · COW HOLLOW

Concrete work in Cow Hollow

What we pour depends on which end of the hollow you are on.

UPPER BLOCKS

Steep driveways & stairs

Blocks climbing toward Broadway need driveway transitions that clear bumpers and stairs with consistent risers. Pump placement and pour sequence are planned before the forms go in.

Concrete Driveway service → LOWER BLOCKS

Foundations on softer ground

Near Lombard, foundation work starts with the soil report. We build to the engineer’s design and flag groundwater risk before any excavation is priced.

Foundation service → UNION STREET

Storefront sidewalks

Victorian storefronts with steady foot traffic. Repair notices handled from permit to sign-off, phased so shops stay open.

Concrete Sidewalk service →

LOCAL KNOWLEDGE · COW HOLLOW

One neighborhood, two kinds of ground

Cow Hollow runs from the base of Pacific Heights down to Lombard Street. The change in soil along the way matters as much as the change in grade.

≈ Filled lagoon, softer soil

The lagoon and marshland at the bottom of the hollow were filled in as the city grew. Parts of lower Cow Hollow sit near the edge of the state-mapped liquefaction zone that covers the Marina.

Your parcel’s hazard status appears on SF Planning’s Property Information Map. If it is in the zone, foundation work typically involves a geotechnical report, and we build to its recommendations.

△ The climb to Broadway

South of Union Street the grade steepens quickly toward Pacific Heights. Houses on these blocks often have garages at the sidewalk, steep aprons, and long runs of entry stairs.

Concrete for those jobs is pumped from the flattest nearby point, and driveway transitions are checked against your actual car before forms are set.

⌂ Dig-downs and groundwater

Lowering a garage slab for an ADU on the lower blocks can bring excavation close to groundwater. That is solvable with sub-slab drainage, waterproofing, and sometimes a sump, but only if it is designed in.

We raise groundwater as a question at the estimate, not after the hole is open.

COMMON QUESTIONS

Cow Hollow concrete questions

Is my Cow Hollow lot in a liquefaction zone?

Check your parcel on SF Planning’s Property Information Map, which shows state seismic hazard zones. The lower blocks near the Marina are the ones most likely to be mapped. If yours is, foundation and dig-down work will typically need a geotechnical report.

What finish works best on a steep Cow Hollow driveway?

A broom finish or exposed aggregate for traction, without a glossy sealer. Fog on a steep grade makes smooth, sealed concrete slick.

Can I lower my garage floor for an ADU on the lower blocks?

Often, but groundwater becomes part of the design. Expect a geotechnical review, sub-slab drainage, and waterproofing in the plan. At the site visit we tell you whether your lot looks like a straightforward dig-down or a wet one.

Nearby areas we serve

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