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Serving Castro Valley, CA and surrounding areas. (510) 973-2948
DAL Castro Valley Concrete serves San Lorenzo, CA with concrete contractor services - sidewalks, driveways, slab foundations, and patios - and our crew has worked on the Bohannon-era homes and clay soil conditions that define this neighborhood since 2018.
San Lorenzo sidewalks have been pushed by tree roots and shifted by clay soil for decades on many of the original Village streets. We remove the old sections, address any root conflict, and install properly jointed replacement panels that hold up to future ground movement. Learn more about concrete sidewalk building.
Most San Lorenzo driveways were poured in the late 1940s and 1950s alongside the homes - which means many are now 70-plus years old, sitting on clay soil that has been shifting beneath them ever since. We replace them with properly based, reinforced slabs that are built to hold up through future wet seasons.
San Lorenzo homes were predominantly built on concrete slab foundations, and many of those original slabs have been affected by decades of clay soil movement. When a slab is cracked, uneven, or no longer adequate for a structure addition or ADU, we pour a new slab built to current Alameda County standards.
San Lorenzo lots are modest in size, and a concrete patio makes real use of the backyard space. We grade the slab area for positive drainage away from the house before any concrete goes down - on clay soil, drainage grading is not optional.
Some San Lorenzo properties near the creek corridor or on slight elevation changes need low retaining walls to manage soil and drainage. We build these with proper drainage provisions behind the wall to prevent hydrostatic pressure from pushing the wall forward over time.
Original garage floors in Bohannon-era homes are typically thin and have often settled unevenly after decades on clay soil. Replacing a garage floor is a straightforward job that dramatically improves usability - and we can add a surface finish if you want a cleaner look.
San Lorenzo is one of the most uniformly postwar communities in the East Bay. Developer David Bohannon built thousands of small tract homes here in the late 1940s in a short window of time, which means a striking proportion of the neighborhood was built to the same standards, at the same time, on the same soil. The upside is that the neighborhood has a coherent, stable character. The challenge for homeowners is that the concrete that came with those homes - driveways, sidewalks, garage floors, and slab foundations - is now 70 to 80 years old. That concrete was not built with the base depth, reinforcement, or expansion joints that current standards require, and the clay soil beneath it has been working on it since the day it was poured.
San Lorenzo Creek, which runs through the community before emptying into San Francisco Bay, adds a drainage dimension to the picture. The Alameda County Flood Control District has managed the creek channel for decades, but properties near the creek corridor still deal with elevated soil moisture and drainage variability that puts additional stress on concrete slabs and foundations. Wet winters and dry summers - the East Bay's standard seasonal swing - mean that clay soil is alternately swelling against slabs and pulling away from foundations all year. That constant movement is the main reason concrete in San Lorenzo cracks and shifts, and it is what a contractor working here needs to understand from the start.
Our crew works throughout San Lorenzo regularly, and we understand the local conditions that affect concrete contractor work here. Because San Lorenzo is unincorporated Alameda County, permits are handled through the Alameda County Planning and Building Department rather than a city hall - a distinction that matters for timeline and process, and one we navigate on every project in this community.
The San Lorenzo Village streets - the original Bohannon development - are the heart of the neighborhood, and that is where the majority of our work here happens. Hesperian Boulevard runs through the community and is the main artery connecting San Lorenzo to Hayward to the south and San Leandro to the north. Most of the residential streets off Hesperian and Grant Avenue have the same postwar bones: one-story homes, modest lots, driveways and sidewalks from the late 1940s, and clay soil that has been in motion since long before anyone currently living here moved in.
We also serve Ashland, which borders San Lorenzo to the east and has a similar unincorporated Alameda County building context. Properties near the boundary between these two communities can expect the same crew and the same local knowledge on both sides.
Call or submit the form and we will respond within one business day. A few details about the project - what needs replacing, where it is on the property, any drainage concerns - help us come to the site visit prepared.
We visit the property, evaluate the existing concrete, the soil conditions, and any drainage factors, and determine whether an Alameda County permit is required. You receive a written, itemized estimate before any decisions need to be made.
If the project requires a permit, we handle the Alameda County application and track it to approval before confirming your start date. Most residential flatwork permits for San Lorenzo are issued within one to two weeks.
We handle all phases from demolition through finishing. The site is cleaned at the end of each work day. On the final day, we walk through the finished work with you and provide written curing instructions so the concrete reaches full strength without issue.
We serve San Lorenzo and surrounding Alameda County communities. One business day response, written estimate, no obligation.
(510) 973-2948San Lorenzo is an unincorporated community of roughly 26,000 to 28,000 residents in western Alameda County, sitting between San Leandro to the north and Hayward to the south. The community is almost entirely residential - dense streets of postwar single-family homes built by developer David Bohannon starting in 1944. San Lorenzo Village, the name of the original planned development, is how many long-time residents refer to the neighborhood, and its street grid and housing character remain much as Bohannon laid them out. The homes are modest in size, one story in most cases, with attached or detached garages and small lots that back up to one another along tight residential blocks.
The community sits close to Hayward to the south, which shares a nearly identical postwar housing profile and the same Alameda County clay soil conditions. To the north, San Leandro borders the community along the same corridor. Interstate 880 runs along the western edge of San Lorenzo, providing access to Oakland, Fremont, and the broader Bay Area. The creek that gives the community its name - San Lorenzo Creek - runs west through the neighborhood toward the bay and is a familiar reference point for residents who live near it.
Get a durable, professionally poured concrete driveway that boosts curb appeal.
Learn MoreExpand your outdoor living with a smooth, long-lasting concrete patio.
Learn MoreAdd decorative texture and style with expertly stamped concrete surfaces.
Learn MoreEnjoy safe, code-compliant concrete sidewalks built to last for decades.
Learn MoreTransform your garage with a clean, sealed concrete floor you can rely on.
Learn MoreElevate any surface with custom decorative concrete finishes and colors.
Learn MoreProtect your landscape with solid concrete retaining walls built to hold.
Learn MoreProfessionally installed concrete floors that are level, strong, and smooth.
Learn MoreCreate a safe, slip-resistant pool deck that enhances your backyard retreat.
Learn MoreSafe, sturdy concrete steps crafted for both function and lasting first impressions.
Learn MoreStart your build right with a precisely formed and poured concrete slab foundation.
Learn MoreReliable foundation installation that supports your structure for the long term.
Learn MoreDurable concrete parking lots designed to handle heavy traffic and daily wear.
Learn MoreProperly engineered concrete footings that provide a stable base for any structure.
Learn MoreRestore and raise settled foundations back to level with precision concrete work.
Learn MoreAccurate concrete cutting for repairs, expansions, and utility access needs.
Learn MoreCall us or submit the form - we respond within one business day and come to you for a free, no-obligation estimate.