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Serving Walnut, CA and surrounding areas. (909) 546-5193
Walnut Masonry handles foundation repair, brick and chimney work, retaining walls, and more - serving homeowners across Walnut and 11 surrounding cities since 2019.
Walnut Masonry is a full-service masonry contractor in Walnut, CA, handling everything from cracked foundations and crumbling chimney mortar to new retaining walls and outdoor kitchens. We offer 16 masonry services and serve 12 cities across the San Gabriel Valley. Every job starts with a free on-site estimate and a written quote - no guesswork, no pressure.
Cracks in your walls or sticking doors? We stabilize shifting foundations before small problems become expensive ones.
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Crumbling mortar or a damaged crown lets water in every time it rains - we fix it before your fireplace pays the price.
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Worn mortar joints are the first thing to fail. We grind out the old material and pack in fresh mortar that lasts 20-plus years.
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Spalling bricks and crumbling joints leave your exterior exposed. We repair and match so the fix blends in from the street.
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An uneven or cracked driveway curb appeal drag. Pavers add lasting beauty and handle California heat without warping.
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Hillside lots need walls that hold. We build retaining walls designed for Walnut's clay soils and wet winters.
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Decades of weather leave their mark. We clean, repair, and reseal aging masonry so it looks and performs like new.
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No fireplace yet? We build custom masonry fireplaces that add warmth, character, and lasting value to your home.
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Stone veneer transforms a plain facade into something that looks like it has always been there - without the full-stone cost.
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Need a durable boundary or privacy wall? Concrete block construction is built to last in Southern California's climate.
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A solid block wall foundation keeps your structure stable and level - we install it right the first time.
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Turn your backyard into a space worth gathering in. We build masonry outdoor kitchens that hold up year after year.
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Cracked or uneven walkways are a hazard. We lay level, attractive pathways that work for both curb appeal and safety.
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A new brick wall adds structure and visual weight to any property - built with the mortar quality that makes it last.
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Natural stone is one of the most durable materials you can build with. We work with it every day and it shows.
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Open joints let water in and weaken the wall behind them. We seal them clean before the damage spreads further.
Learn MoreTell us what you are seeing - sticking doors, crumbling mortar, a cracked wall, or something you cannot quite name. We ask a few quick questions about your home and the problem, then schedule a free on-site visit, usually within a few days. You hear back from us within 1 business day.
We walk your property with you, look at the actual condition of the masonry, and explain what we are seeing in plain terms. You get a written estimate that covers exactly what work we are proposing, why, and what it will cost. No verbal-only quotes. No pressure to sign on the spot.
Once you approve the estimate, we schedule the job and show up when we say we will. We handle any required permits, keep you informed as the work progresses, and clean up completely when we are done. Before we leave, we walk you through everything - what was done, what to watch for, and your warranty.
We hold a valid California contractor's license - verifiable at cslb.ca.gov - and carry full liability coverage on every project. You are protected from the first day of work through the final sign-off.
We come to your property, assess the actual condition, and hand you a written quote before you commit to anything. The estimate visit is free. The written quote is yours to keep and compare.
We have been working in the San Gabriel Valley since 2019. We know the local soils, the permit process through LA County, and what masonry in this climate actually needs to hold up.
We leave you documentation - permit sign-offs, warranty terms, and care instructions - before we consider the job done. That paperwork protects you if you ever refinance or sell.
Ready to get started? Call (909) 546-5193 or send us a message.
"They came out the same week I called, found two cracks in my foundation I had missed, and fixed the whole thing in two days. The repair blended in perfectly with the original concrete. No drama, no surprises on the bill."
Carlos M., Diamond Bar - Foundation Repair
"My chimney mortar had been crumbling for two winters and I kept putting it off. They matched the original mortar color really well and got it done before fire season. I used the fireplace three days later."
Linda P., Walnut - Chimney Repair
"Our retaining wall on the back slope was starting to lean. They assessed it, told us exactly what was happening with the soil, and built us a new wall that looks solid. Three months later it has not moved an inch."
James T., Rowland Heights - Retaining Wall Construction
We respond within 1 business day. There is no obligation to move forward after your estimate. Once you submit the form, someone from our office will call you to schedule a free on-site visit at a time that works for you.
(909) 546-5193Walnut Masonry is based in Walnut, CA and serves 12 cities across the San Gabriel Valley, including Diamond Bar, West Covina, and Pomona. We work throughout the region and can typically schedule a free estimate visit within the same week you call.
Expansive clay soil swells when wet and shrinks when dry - a cycle that physically pushes and pulls on concrete and masonry every year. The California Geological Survey tracks this as one of the leading causes of property damage in Southern California. Catching the damage early keeps repairs manageable. California Geological Survey - Expansive Soils.
Yes - even minor tremors can open hairline cracks in chimney mortar or shift the brick stack slightly. The San Gabriel Valley experiences frequent minor seismic events, and cumulative movement is often what causes the most damage over time. A quick visual check after any shaking you feel is a smart habit.
Fall and early spring are the most reliable seasons. Fresh mortar cures best between 40 and 90 degrees Fahrenheit - Walnut's hot summers (regularly above 95) and occasional freezing nights at elevation both push outside that window. Late summer through October hits the sweet spot before fire season and winter rains.
Quality tuckpointing done correctly lasts 20 to 30 years. The key word is correctly - old mortar must be ground out to a consistent depth before new material is packed in. Surface-only patches fail within a few years. For homes built in Walnut's 1970s and 1980s building boom, the mortar is often overdue for full replacement.
Retaining walls above a certain height - typically four feet - require a permit and engineered drawings through Los Angeles County. Walnut has a significant number of hillside lots where slopes and clay soils combine to put extra pressure on walls over time. A wall that was built without proper drainage behind it will eventually move.
Routine mortar and brick repairs typically do not require a permit. Structural work - foundation repair, chimney rebuilds, retaining walls over four feet - generally does, since Walnut falls under Los Angeles County jurisdiction. The Chimney Safety Institute of America recommends annual chimney inspections regardless of permit requirements, especially for homes with fireplaces that see regular use. Chimney Safety Institute of America.
Walnut Masonry is a licensed and insured masonry contractor based in Walnut, CA, serving 12 cities across the San Gabriel Valley since 2019. We hold a California contractor's license issued through the California Contractors State License Board - verifiable at cslb.ca.gov - and carry full liability insurance on every job. Since opening, we have completed masonry projects ranging from single-brick chimney repairs to full foundation stabilization and new outdoor kitchen builds. Learn more about us.
Hairline cracks along mortar joints are common and usually just need repointing. A crack that runs diagonally through both mortar and brick, or one that is getting wider over time, deserves a professional evaluation - especially on hillside lots where soil movement is a factor.
Water enters through open joints and works into the wall structure. Over time this leads to spalling bricks, interior moisture damage, and eventually bricks that need full replacement rather than simple repointing. Catching it at the mortar stage is almost always the cheaper option.
Look for leaning, horizontal cracking near the base, soil pushing through gaps, or drainage water that is not going where it should. A wall that has moved even slightly deserves an assessment - walls under pressure do not tend to stabilize on their own.
If you have noticed any of these signs on your property, the right next step is a free on-site look. Call (909) 546-5193 or send us a message to schedule your estimate.
Walnut is a mostly residential city in the eastern San Gabriel Valley, home to about 29,000 residents. The city grew rapidly between the 1970s and 1990s, and the bulk of its housing stock dates from that era - making most homes here between 30 and 50 years old. You can learn more about the city at the City of Walnut's official website. The U.S. Census QuickFacts page for Walnut shows that over 80% of housing units are owner-occupied - one of the higher rates in the region, which tells you something about how residents invest in their properties.
The city has several well-known landmarks and community anchors. Mount San Antonio College - better known as Mt. SAC - sits right on the Walnut border and is one of the largest community colleges in California. Suzanne Park is a gathering spot near the center of town, and many families are drawn to Walnut for its schools, served by the Walnut Valley Unified School District, one of the consistently top-ranked districts in California. Many families come to Walnut to stay, which means they invest in their homes for the long term.
Walnut sits in hilly terrain, and many homes are built on graded hillside lots that wind up and around ridges. Those slopes put extra demand on retaining walls and drainage systems over time. The clay soils under much of the San Gabriel Valley expand when wet and shrink during the long dry summers - a cycle that gradually cracks driveways, shifts block walls, and stresses foundations. That is exactly the kind of work we do every day, and it is why homeowners across Walnut call us before problems get bigger.
By appointment only, no walk-ins.
Walnut Masonry
322 Centinary Dr
Walnut, CA 91789
Always open, 24/7.
We serve Walnut and 11 surrounding cities - get a free, no-obligation estimate from a licensed California masonry contractor.