Engineered, code-compliant foundations for new homes, ADUs, additions and buildings in Castro Valley — poured to your soil report and your build schedule, not a generic template.
Castro Valley building departments review foundation plans against the site conditions your specific parcel actually has — a mix of bay flatland and East Bay hillside conditions, reviewed under Alameda County's building code rather than a city's, since this community isn't its own incorporated city. Most of the projects we take on in Castro Valley sit on a range of lot types across an unincorporated community that permits through Alameda County, and a foundation designed without accounting for that tends to draw corrections or, worse, perform poorly once it's in the ground. We start every Castro Valley project by confirming your soil report, your structural engineer's plans and your site's actual conditions, then build to that — not a template adjusted after the fact.
Full foundation construction for ground-up custom homes in Castro Valley — excavation, forming, rebar and pour, built to your engineer's stamped plans.
Slab-on-grade and raised foundations sized and engineered for detached, attached and garage-conversion ADUs on Castro Valley lots.
New footings and foundation extensions for room and second-story additions in Castro Valley, tied into your existing foundation correctly.
Both foundation types, built to spec for Castro Valley's soil and drainage conditions — a straightforward slab where it fits, a raised foundation where it's needed.
We review your approved plans, structural engineering and soil report against your specific Castro Valley parcel before anything is dug.
Excavation, forming and rebar placement built to the engineered spec — footings, stem walls or slab, sized and reinforced correctly.
Concrete poured, finished and cured on schedule, with documentation your inspector and general contractor both need.
We coordinate the foundation inspection and hand off a foundation that's ready for your framer.
Two decades pouring foundations across the Bay Area, not a generic national template.
Full California contractor's license and insurance coverage — ask to see it.
We draw against Alameda County's zoning and building rules for this community, not a neighboring incorporated city's, and confirm your parcel's actual soil and grading conditions before we design.
We plan pours around your framer's start date, not the other way around.
Based in the Bay Area, working throughout Santa Clara, San Mateo, Alameda and Contra Costa counties.
In almost all cases, yes — foundation design for new construction, additions and ADUs typically requires a licensed structural engineer's stamped plans before a building department will permit it. We build to those stamped plans; if you don't have an engineer yet, we can point you to ones we work with regularly.
It depends on project size and foundation type — a straightforward ADU slab in Castro Valley moves much faster than a full custom home foundation with extensive grading. We'll give you a realistic timeline once we've reviewed your specific plans and site.
Most single-family lots qualify for at least one ADU under state law, subject to local setback, height and lot-coverage rules that vary by city and zoning district. We confirm what your parcel supports as part of the foundation design process, working alongside your ADU plans.
Both. Some clients come to us directly, often before they've hired a general contractor; others are referred by a GC or architect who wants a foundation sub they can hand a stamped plan set to and trust.
No. Castro Valley is an unincorporated community, so it doesn't have its own city hall or building department. Foundation permits for Castro Valley projects are reviewed by Alameda County's planning and building departments under the county's code, not a city's.
New construction is our primary focus, but we do take on foundation repair and seismic retrofit work for existing homes as a secondary service — see our Foundation Repair & Retrofit page for details.
Tell us what you're building — a new home, an ADU, an addition — and we'll get back to you with next steps, usually within one business day.
(925) 592-7162
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