Serving Union City, CA and surrounding areas. (510) 738-1780
Union City Concrete delivers concrete contractor services throughout San Lorenzo, CA, including sidewalk repair, driveway replacement, and slab work - a licensed crew that works regularly on the postwar Bohannon-era homes that define this community and understands the clay soil and drainage conditions that age concrete fast here.
San Lorenzo Village sidewalks poured in the late 1940s and early 1950s have spent decades shifting with the clay soil below them - most are cracked, uneven, and a trip hazard. Our concrete sidewalk building work includes removing the old sections, preparing the base properly for East Bay soil conditions, and placing control joints at the right intervals so the new concrete has room to move without fracturing.
Most San Lorenzo driveways were poured as part of the original Bohannon tract builds in the late 1940s, and 70-plus years of Bay Area clay soil movement has left them cracked, sunken, and difficult to patch properly. A full replacement with the right base compaction gives the property a clean surface that handles the wet-dry cycle much better than a patched original pour.
Backyard slabs and patios on San Lorenzo homes have settled and cracked as the clay soil below them expanded and contracted through decades of wet winters and dry summers. Patching over a bad base just delays the next round of cracking - a properly graded and compacted replacement stays flat and drains water away from the foundation instead of toward it.
Entry steps and front approach concrete on San Lorenzo homes from the postwar era have lifted or sunken with the soil, creating awkward grade changes and potential trip hazards. Replacing them with the right footing depth and joint placement keeps the entry level and minimizes the same movement from happening again.
Slab foundations on Bohannon-era San Lorenzo homes have been sitting on expansive clay for over 70 years, and many show cracking, settling, or signs of water intrusion at the perimeter. Catching these issues before they worsen protects the structure above and avoids the much larger cost of a full foundation repair after water damage has been allowed to continue.
San Lorenzo properties near the creek corridor and low-lying streets see drainage problems when winter rain hits hard. Grading exterior concrete correctly - patios, driveways, and side-yard slabs - so water moves away from the foundation and toward the street or yard is one of the most practical things a homeowner can do to protect an older home in this neighborhood.
San Lorenzo is one of the East Bay's most uniformly aged communities - nearly all of its housing stock was built between 1945 and 1960 as part of developer David Bohannon's large-scale postwar tract. That means the original concrete on most properties - slabs, driveways, sidewalks, and patios - is now 65 to 80 years old. Even well-poured concrete from that era has exhausted its practical life, and the expansive clay soil underneath has been accelerating that process through decades of seasonal swelling and shrinking. Most of what is cracked and sunken in San Lorenzo is not a repair job - it is a replacement job.
The drainage factor here compounds the problem. San Lorenzo Creek runs through the community, and low-lying streets in the flatter parts of the neighborhood can see significant water pooling during heavy rain years. Water that sits against a foundation or under a driveway slab works into every crack and softens the base below. A concrete contractor who does not account for drainage grading when replacing flatwork is leaving the conditions in place that caused the original failure. The right base prep, the right slope away from the structure, and properly placed control joints are what separate a concrete job that lasts from one that fails in five years on the same clay soil.
Our crew works regularly on the postwar tract homes that fill San Lorenzo Village and the surrounding blocks - the small single-story homes on modest lots with attached garages, front approach concrete, and backyard slabs that are all the same age and showing the same wear. Knowing what these properties look like under the surface - the original base material, how the slab sits on the clay, where drainage tends to pool - changes how we approach each estimate.
San Lorenzo is unincorporated Alameda County, so permits for concrete work go through Alameda County Public Works rather than a city building department. That distinction matters for scheduling - county permit timelines and inspection requirements differ from those in neighboring incorporated cities, and we build that lead time into every project so homeowners are not surprised by the wait. Interstate 880 along the western edge of the neighborhood and the surface streets through the Village are the routes our crew uses regularly getting to and from jobs here.
We work across the surrounding East Bay communities as well, including Hayward just to the south, where the same clay soil and aging housing stock conditions apply, and San Leandro to the north.
Reach out by phone or through our contact form and we will respond within one business day. Let us know the project type, approximate size, and whether you are in San Lorenzo Village or closer to the Hayward or San Leandro borders.
We visit the property, assess the existing concrete, look at the base condition and drainage, and provide a written estimate. There is no charge for the estimate, and the scope and price will be clear before you decide anything.
We pull any required Alameda County permits before work begins. Permit processing can take one to three weeks, so we give you an honest timeline upfront. On-site work typically runs one to three days for flatwork projects.
After the pour, we walk through the finished work with you before we leave. Stay off foot traffic for 24 to 48 hours and avoid driving on a new driveway for a full seven days. We clean up the site before we go.
We work on homes across San Lorenzo every week. Free written estimates, Alameda County permits handled, and a crew that knows Bohannon-era properties.
(510) 738-1780San Lorenzo is an unincorporated community in Alameda County sitting between San Leandro and Hayward along the western edge of the East Bay flatlands. It is best known as one of the largest postwar planned suburban developments in California - developer David Bohannon built thousands of small tract homes here starting in 1944, creating what became known as San Lorenzo Village. The community has a population of roughly 27,000 packed into about 3.5 square miles, making it one of the denser residential pockets in Alameda County. Most streets are quiet residential blocks filled with small single-story homes, many of which still carry the original architectural details from the postwar era.
The local housing mix is roughly split between owners and renters, which means contractors here work for both homeowners doing planned upgrades and landlords dealing with deferred maintenance on aging rental properties. San Lorenzo Creek runs along the western edge of the community before emptying into San Francisco Bay, and the blocks closest to the creek corridor deal with more drainage concerns than those farther inland. Neighboring Newark to the south and Milpitas further south share much of the same postwar slab-foundation building stock, making them natural companions for concrete service work in the area.
Durable concrete driveways built to handle daily traffic and enhance curb appeal.
Learn moreCustom concrete patios designed for outdoor living and lasting performance.
Learn moreDecorative stamped patterns that add texture and style to any surface.
Learn moreSafe, smooth sidewalks poured to code for residential and commercial properties.
Learn moreProfessional garage floor concrete that resists stains, cracks, and heavy loads.
Learn moreDecorative finishes and overlays that transform plain concrete into a design feature.
Learn moreStructurally sound retaining walls engineered to control erosion and grade changes.
Learn morePrecision floor installations for residential, commercial, and industrial spaces.
Learn moreSlip-resistant pool deck surfaces built for beauty, safety, and durability.
Learn moreSolid concrete steps and stairs crafted for safety and long-term stability.
Learn moreStrong slab foundations poured and finished to support any structure.
Learn moreComplete foundation installation services from excavation through final pour.
Learn moreCommercial-grade parking lots built for heavy use, drainage, and longevity.
Learn moreProperly sized and poured concrete footings to anchor structures securely.
Learn moreExpert foundation raising to level settled slabs and restore structural integrity.
Learn moreMost San Lorenzo homes are overdue for concrete attention - the older the flatwork, the more it is working against you. Call now and we will come out, assess the work, and give you a clear written price.
