Loading...
Serving Concord, CA and surrounding areas. (925) 536-0971
CDM Concord Masonry is a licensed masonry contractor serving Antioch, CA homeowners with retaining wall construction, foundation repair, and driveway pavers - responding to every inquiry within 1 business day and handling all City of Antioch permits for structural work.
Antioch has a significant number of hillside lots - especially in the east end near Lone Tree Way and Deer Valley Road - where winter rains combine with clay soil expansion to push slopes into slow, persistent movement. Our retaining wall construction service builds walls with drainage systems designed specifically for the wet-dry pressure cycle that Antioch's climate delivers every single year - walls that hold after the first big rain, and after the tenth.
Many Antioch homes built in the 1970s through 1990s are now showing the cumulative effect of clay soil swelling and shrinking beneath their foundations for decades. Sticking doors, diagonal cracks above window frames, and floors with a visible slope are the signs that the slab beneath the house has moved - and in Antioch, that movement will continue every year unless the foundation is addressed.
Antioch's combination of clay soil and summer heat above 100 degrees is particularly hard on concrete driveways. The clay pushes up from below as it swells in winter, and the summer heat bakes the surface from above - cracking, heaving, and surface scaling are almost inevitable on older poured concrete. Paver driveways give the surface natural flexibility to move with the ground instead of fracturing against it.
Property line walls and garden walls in Antioch frequently need replacement after 30 or 40 years because the original footings were not deep enough to stay stable through the seasonal clay soil movement. New block walls built with properly sized footings and steel reinforcement as required by Antioch building code stay plumb and level through conditions that toppled the originals.
Raised, cracked, or uneven walkways are one of the most common masonry issues we encounter across Antioch's older neighborhoods. The clay soil lifts and shifts the concrete through the wet season, creating trip hazards that standard resurfacing does not fix because the cause is underground. We address the subbase before laying new material so the same problem does not return the following winter.
Chimneys and brick walls in Antioch face a punishing combination: sustained heat above 100 degrees in summer and concentrated rain in winter. Mortar that has been through 30 or 40 years of that cycle often crumbles at the joints, allowing water to enter during the rainy season and accelerating the damage from inside. Tuckpointing before the wet season is the repair that stops that cycle before it reaches the brick itself.
Antioch is one of the largest cities in Contra Costa County with around 115,000 residents, and the housing stock covers a wide span - from 1970s tract homes near downtown to newer two-story subdivisions built in the 1990s and 2000s in the east part of the city. Most of the older housing has never had its original concrete flatwork or masonry chimneys seriously addressed, and many of those structures are now well past the age where maintenance becomes unavoidable. Antioch sits inland from the Bay, which means summer temperatures regularly push above 95 degrees and frequently exceed 100 degrees in July and August. That sustained heat dries and cracks mortar joints, blisters concrete surfaces, and causes the clay soil beneath foundations and driveways to shrink and pull away from whatever is sitting on top of it.
When November arrives and the rains start, that same clay soil swells back up rapidly, and the pressure it creates against foundations, retaining walls, and concrete slabs is the main driver of structural masonry damage in Antioch. Homes built on the eastern hillsides face additional slope drainage challenges on top of the standard seasonal soil movement - retaining walls without proper drainage behind them fail in this environment, often within a few years of construction. A masonry contractor who works Antioch regularly understands that most visible surface cracking here is a symptom of what the ground is doing, not just weathering. The City of Antioch has its own building permit process for structural masonry work, and handling permits through the correct channels is a standard part of every job we do here.
We pull permits for structural masonry work through the City of Antioch as a routine part of our process - we know which project types require permits here and handle that paperwork on behalf of our clients so they do not have to navigate the building department on their own.
We work on homes throughout Antioch - from older neighborhoods near downtown and Highway 4, to the newer subdivisions near Lone Tree Way and the hillsides around Contra Loma Regional Park. The city is large enough that the soil conditions and property types vary meaningfully by neighborhood - flat older lots near the waterfront behave differently than sloped east Antioch lots - and that difference matters for how we approach the work. The Antioch BART station area and the communities near the waterfront are parts of the city we know well.
We also work in Oakley, to the east, where the clay soil and residential character are similar to Antioch. Homeowners in Pittsburg to the west will find the same seasonal cracking patterns and postwar housing stock that shape masonry demand throughout this part of Contra Costa County.
When you contact us, we ask a few basic questions - what you are seeing, where the problem is, and your address in Antioch. We reply within 1 business day and schedule a free on-site visit at a time that works for you, including Saturdays.
We look at the structure in person, check for the underlying cause - not just the surface symptom - and explain what we found in plain language. If the project needs a City of Antioch permit, we tell you upfront and include the permit timeline in the estimate. No pressure to decide the same day.
For structural work requiring a permit, we submit the application to the City of Antioch Building Division on your behalf. Permit approval typically adds a few business days before work begins. We confirm your start date and let you know what the work area needs to look like when the crew arrives.
Most Antioch masonry jobs take one to three days on site. Retaining walls on hillside lots and foundation projects run longer, depending on scope. We coordinate any required city inspector visits and walk you through the finished work before leaving. You do not need to be home the entire time.
We serve homeowners throughout Antioch, CA and respond within 1 business day. Free estimates, licensed work, and City of Antioch permits handled when required.
(925) 536-0971Antioch is one of the largest cities in Contra Costa County, with a population of around 115,000 and a housing stock that spans from 1970s tract homes near Highway 4 to newer two-story subdivisions that expanded east toward Lone Tree Way and Deer Valley Road through the 1990s and 2000s. The city sits along the San Joaquin River at the eastern edge of the Bay Area, where the delta meets the start of California's Central Valley. That location makes Antioch hotter in summer and cooler in winter than coastal Bay Area cities - temperatures above 95 degrees are routine from June through September, which is harder on concrete, mortar, and stucco than many homeowners realize until the cracks appear.
The downtown area and the neighborhoods along the waterfront have an older character, with homes and commercial buildings that have been through several cycles of renovation and deferred maintenance. East Antioch has a more suburban feel, with single-family homes on mid-size lots and a newer infrastructure that is only now reaching the age where first-generation repairs are coming due. The Antioch BART station connects the city to Oakland and San Francisco, making it a practical base for commuting families who own their homes and want contractors they can trust to work without being watched over. Nearby communities we also serve include Pittsburg to the west and Oakley to the east, both part of the same East Contra Costa County landscape we work in every week.
We assess and repair foundation cracks, settling, and structural issues to keep your property safe.
Learn moreOur masons restore deteriorated chimney masonry, crowns, and flashing for lasting performance.
Learn moreWe remove damaged mortar and repack joints to strengthen and weatherproof brick and stone surfaces.
Learn moreCracked or spalling bricks are replaced with matching materials to restore appearance and integrity.
Learn moreWe design and install durable paver driveways in natural stone, concrete, or brick finishes.
Learn moreEngineered retaining walls built to manage soil, prevent erosion, and define outdoor spaces.
Learn moreAging masonry structures are carefully cleaned, repaired, and restored to their original condition.
Learn moreCustom fireplace surrounds and hearths built in brick or stone to enhance any living space.
Learn moreNatural and manufactured stone veneer applied to walls, columns, and facades for lasting curb appeal.
Learn moreStructural concrete masonry unit walls built for durability, security, and noise reduction.
Learn moreConcrete block foundation walls installed to provide a strong, moisture-resistant base for structures.
Learn moreFully custom outdoor kitchen structures built in stone or brick, designed for California living.
Learn moreFlagstone, brick, and paver walkways installed to create safe, attractive pathways across your property.
Learn moreNew brick walls built for fencing, garden borders, and architectural features with clean, expert coursing.
Learn moreHandcrafted stonework for walls, pillars, and decorative features using natural and cultured stone.
Learn morePrecision mortar joint repointing to stop water infiltration and renew brick surfaces.
Learn moreFrom retaining walls and foundation repair to driveway pavers and tuckpointing, we cover all of Antioch and respond within 1 business day. Call or send a message for your free estimate.