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Serving Walnut Creek, CA and surrounding areas. (925) 532-0850
Walnut Creek Masonry & Concrete is a Masonry Contractor serving Martinez, CA with foundation repair, retaining wall construction, and brick repair on the Victorian, craftsman, and ranch homes that make up most of this city. We have been working throughout Contra Costa County since 2020 and understand exactly what the clay soils and wet winters here do to masonry over time.
Martinez sits on clay-heavy soils that swell and shrink with every wet and dry season, and the older homes in this city - many built before 1970 - have been absorbing that ground movement for decades. Our foundation repair work addresses cracks, settling, and stem wall damage before they travel through walls and floors.
The hillside lots in the northern and eastern parts of Martinez - above Alhambra Avenue and up toward the ridgeline - put constant pressure on retaining walls when winter rain saturates the clay soil. We build walls with drainage designed into the structure from the start, so they hold even when the ground is at its most saturated.
Craftsman and Victorian homes near downtown Martinez have brick chimneys, facades, and planters that are well over 50 years old in many cases, and the mortar in those older structures has often carbonated and crumbled past the point of patching. We replace damaged brick units and repoint joints so the repair holds through the next round of wet winters.
Martinez chimneys take a beating from the combination of hot, dry summers and cold, wet winters - the mortar joints open with heat and then absorb water when the rains come. On the older craftsman and ranch homes throughout the city, a chimney that has not been inspected in ten years or more almost always has crown damage or open mortar joints that let water into the firebox.
The blocks closest to downtown Martinez include homes that are more than a century old, and the masonry on those properties needs careful cleaning, repointing, and stabilization rather than wholesale replacement. Restoration preserves the character of older Martinez homes while stopping the deterioration that accelerates once water gets through the mortar line.
Concrete walkways on postwar ranch homes in Martinez have been through 50 to 70 winters, and clay soil movement combined with tree root pressure has heaved and cracked most of the original flatwork. We remove and replace damaged sections with properly compacted base and control joints that account for how this soil behaves through seasonal wet and dry cycles.
Martinez was incorporated in 1876, making it one of the oldest cities in Contra Costa County. A significant share of the housing stock was built before 1970 - Victorian-era homes near downtown, craftsman bungalows from the 1910s and 1920s, and postwar ranch homes from the 1950s and 1960s. Masonry on homes that age is at or past its original design life. Mortar carbonates and crumbles, bricks spall, and concrete flatwork has absorbed decades of clay soil movement. These are not cosmetic problems - they are structural issues that get more expensive the longer they go without attention.
The soils underneath most Martinez properties are expansive clay, which is the dominant soil type throughout Contra Costa County. Clay swells when it gets wet and shrinks when it dries, putting masonry through a low-grade stress cycle every single year. On hillside lots in the northern and eastern parts of the city, slope drainage compounds the problem: winter rain runs downhill, saturates the soil against foundations and retaining walls, and creates hydrostatic pressure that pushes on masonry from behind. A masonry contractor who does not understand how Martinez clay behaves through the seasons is going to build a repair that fails prematurely - and the homeowner pays twice.
Our crew works throughout Martinez regularly, and we understand the local conditions that affect masonry work here. We are familiar with the City of Martinez permit process for structural masonry, including the plan check requirements that apply to retaining walls and foundation repairs. Getting a permit in Martinez is manageable when you submit the right documents the first time, and we put together complete packages so the review does not stall mid-project.
We work on homes throughout the city - from the craftsman and Victorian blocks just off Alhambra Avenue near downtown, to the hillside neighborhoods above the John Muir National Historic Site, to the postwar ranch streets closer to the marina. Each part of Martinez has its own mix of property ages and lot conditions, and the masonry work reflects that difference. We also know that the hillside streets above downtown drain differently than the flat lots near the Carquinez Strait, and we account for that in how we approach retaining wall and drainage work.
We also serve the cities right next to Martinez. If your home is in Concord to the south, or in Pleasant Hill, we cover that work too.
Reach us by phone or through the contact form. We respond within one business day and will ask a few questions about your project so we arrive at your Martinez property prepared - not guessing.
We come to your property, walk the work area, and give you a written estimate at no charge. We will tell you exactly what we found, what we recommend, and whether the project requires a permit from the City of Martinez - along with what that adds to the timeline. No surprise costs after the fact.
Our crew shows up on the scheduled day, protects surrounding areas, and works through the scope we agreed on. You do not need to be home for most jobs, but we will walk you through what we did when we finish so you can see the work firsthand.
We clean up the work area before we leave and give you any care instructions for new mortar or concrete that needs curing time. If anything comes up in the weeks after we finish, call us - we stand behind our work.
We serve Martinez homeowners from the hillside streets above downtown to the neighborhoods near the marina. Reach out and we will schedule a site visit within one business day.
(925) 532-0850Martinez is the county seat of Contra Costa County with a population of about 38,000. The city sits at the edge of the Carquinez Strait in the northern part of the county and has a distinctly different character from the newer inland suburbs. Downtown Martinez has a walkable historic core along Alhambra Avenue, with local restaurants, shops, and the county courthouse within a few blocks of each other. The neighborhoods closest to downtown include some of the oldest housing in the county - Victorian-era houses on streets like Berrellesa and Green, craftsman bungalows from the early 1900s, and a mix of mid-century homes as you move away from the core. The overall homeownership rate sits around 60 percent, meaning most people living here have a long-term stake in keeping their property in good shape.
Beyond downtown, Martinez spreads into hillside neighborhoods to the north and east where lots are sloped, driveways are longer, and retaining walls are a practical necessity on many properties. The Martinez Marina on the Carquinez Strait is one of the most recognized spots in the city, and the neighborhoods closest to the water have a mix of older and mid-century homes on relatively flat lots. The city also borders Concord to the south, and many residents commute along Highway 4 and Interstate 680 to jobs throughout the Bay Area.
Restore structural integrity with expert foundation crack and settlement repairs.
Learn MoreBuild strong retaining walls that control erosion and shape your landscape.
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Learn MoreTransform any surface with beautiful, professionally applied stone veneer.
Learn MoreBuild durable concrete block walls for property division and structural support.
Learn MoreInstall solid block foundation walls designed for long-term structural performance.
Learn MoreCreate a stunning outdoor kitchen built with quality masonry craftsmanship.
Learn MoreDesign and build attractive, long-lasting walkways for your home or business.
Learn MoreConstruct classic brick walls that add timeless style and lasting durability.
Learn MoreRefresh and reseal brick mortar joints to prevent water intrusion and damage.
Learn MoreCall us or submit a contact form and we will get back to you within one business day to schedule your free on-site estimate.