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Piedmont Concrete & Masonry provides masonry contractor services in San Lorenzo, CA, including walkway construction, driveway repair, chimney work, and foundation repair. Our crew understands the postwar Bohannon-era homes that fill this community and the clay soil conditions that drive most of the concrete and masonry issues homeowners here face.
Most San Lorenzo homes were built in the late 1940s with modest concrete walkways that have been cracking and settling ever since. Bay Area clay soils have pushed and pulled on those slabs for 70-plus years, and a lot of them are past the point of repair. Our walkway construction service removes the old concrete and pours a properly prepared replacement that handles the soil movement this community deals with every season.
Driveways on Bohannon-era homes in San Lorenzo are now well past their designed service life, and the heaving, cracking, and surface spalling that comes with that age is visible on nearly every block. We assess whether a driveway can be patched effectively or whether full replacement is the smarter investment, and we give you that comparison in writing before any work starts.
Original brick chimneys on San Lorenzo homes from the late 1940s have absorbed decades of winter rain and summer heat, and the mortar joints and crowns on many of them are failing. A failing chimney crown lets water into the flue during winter storms and can damage the firebox, framing, and interior ceiling below. We repair mortar, replace cracked caps, and restore flashing to stop the water entry before it gets inside.
Most San Lorenzo homes sit on concrete slab foundations, and Bay Area clay soils have been applying pressure to those slabs through every wet and dry season since they were poured. Cracked slabs, uneven floors, and sticking doors are all signs that the foundation may need attention. We inspect slab foundations and give a clear picture of what is cosmetic and what requires repair.
Brick chimneys and garden walls on San Lorenzo homes have mortar from the Bohannon era that was softer than modern formulations and is now eroding at the joints. Open mortar joints let rainwater into the brick and accelerate spalling during the freeze-thaw cycles the Bay Area occasionally sees in winter. Tuckpointing closes those joints with fresh mortar and stops water at the surface before damage spreads inward.
Homes near San Lorenzo Creek and in lower-lying parts of the community face drainage challenges during heavy rain years, and older concrete flatwork often slopes toward the house rather than away from it. We correct drainage around driveways, patios, and foundation perimeters so winter runoff moves away from the structure rather than pooling against it season after season.
San Lorenzo was built almost entirely in the late 1940s by developer David Bohannon, who put up thousands of tract homes in a compressed period of time after World War II. The result is a community where the overwhelming majority of houses are roughly the same age - and where the concrete driveways, walkways, slab foundations, and brick chimneys that came with those homes are all reaching the same stage of wear at the same time. When a San Lorenzo homeowner calls about a cracked driveway or a chimney that leaks in heavy rain, we already know the building type, the material choices of that era, and the soil conditions the structure has been sitting on since it was built. That background shapes how we approach repairs and what solutions hold up over time on properties like these.
The soil under most of San Lorenzo is clay-heavy, and that clay goes through a predictable cycle every year. Winter rains cause it to swell, and the long dry summer from May through October causes it to shrink and pull away from foundations and flatwork edges. After 70-plus years of that cycle, concrete slabs crack, driveways heave, and patios shift noticeably. Properties near San Lorenzo Creek also deal with drainage issues during heavy rain years, when water that has nowhere else to go collects against foundations and saturates the soil beneath driveways. These are not random or unpredictable problems - they are direct results of the local conditions, and a masonry contractor working here regularly understands how to address them at the source, not just the surface.
Our crew works throughout San Lorenzo regularly, and we understand the local conditions that affect masonry contractor work here. The housing stock is remarkably consistent - nearly all single-story or small two-story Bohannon homes on modestly sized lots, with attached or detached garages and small backyard patios. That consistency means the repair patterns repeat from street to street: aging concrete flatwork, original brick chimneys with eroding mortar, and slab foundations that have been shifting with the clay soil beneath them for decades.
San Lorenzo is accessible from Interstate 880, which runs along the western edge of the community, and from Hesperian Boulevard, one of the main surface streets running through the area. The community is bordered by Hayward to the south and San Leandro to the north. We work across all of those areas and know the access patterns and local permit processes that apply in unincorporated Alameda County, where San Lorenzo sits.
Permits for structural work in San Lorenzo are issued by Alameda County Public Works rather than a city building department, since San Lorenzo is unincorporated. We handle permit applications for work that requires them and include the estimated permit fee in the written quote so there are no hidden costs when the job is approved.
Reach us by phone or through the contact form and describe what you are seeing - a cracked walkway, a leaking chimney, or a driveway that has been shifting. We respond within one business day to schedule an on-site visit at a time that works for you.
We come to your San Lorenzo property, look at the damage in person, and explain what we see and why it happened. You receive a written quote with a clear scope and price - no pressure, no inflated numbers - so you can decide how to proceed.
Once you approve the quote, we schedule a start date and confirm it with you before the crew arrives. For concrete pours we schedule around the weather forecast - you will know the date in advance and do not need to be home for most of the work unless you want to be.
When the job is done, we walk you through the finished work, explain any cure times or care instructions for new concrete, and clean up the site before we leave. If anything needs a follow-up, we handle it promptly.
We serve homeowners throughout San Lorenzo and the surrounding unincorporated Alameda County communities. Call or send us a message and we will get back to you within one business day.
(510) 822-3905San Lorenzo is an unincorporated community in Alameda County, tucked between San Leandro to the north and Hayward to the south along the eastern shore of the Bay. It was built almost entirely in the late 1940s as a planned postwar suburb by developer David Bohannon, who put up thousands of modest single-family homes in a short window of time for returning veterans and their families. The result is a neighborhood with a remarkably consistent housing stock: mostly one-story homes on small to medium lots, with attached or detached garages, small yards, and street patterns laid out in an orderly grid. San Lorenzo Village, the heart of the community, still carries the name Bohannon gave it, and longtime residents use it to describe where they live. San Lorenzo has a population of roughly 26,000 to 28,000 and is one of the denser unincorporated communities in the East Bay.
San Lorenzo Creek runs through the community on its way to San Francisco Bay, and its presence shapes both the neighborhood character and the drainage challenges that homeowners near the creek corridor experience in heavy rain years. Interstate 880 provides the main highway access, and Hesperian Boulevard is the central commercial and residential spine running north-south through the community. Neighboring Castro Valley sits to the east in the hills above San Lorenzo, while Oakland is a short drive up Interstate 880 to the north. San Lorenzo homeowners have real equity to protect in a market where median home values have risen well above $600,000, and keeping the original concrete and masonry in good shape is one of the most direct ways to protect that investment.
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Learn MoreWhether your driveway is cracking, your chimney is leaking, or your walkways have been heaving for years, we can help. Call today or submit a request and we will be in touch within one business day.