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Serving Ontario, CA and surrounding areas. (909) 738-1803
OT Ontario Masonry handles foundation repair, brick and stone work, chimneys, retaining walls, and more for homeowners across the Inland Empire. We show up, assess the job honestly, and give you a written estimate before any work begins.
OT Ontario Masonry is a licensed Masonry Contractor based in Ontario, CA, serving homeowners and property owners throughout the Inland Empire. We offer 16 masonry services - from foundation repair and chimney work to retaining walls, outdoor kitchens, and decorative stonework. Whether you have an urgent repair or a planned construction project, we handle both with the same attention to detail and the same honest process.
Cracks in your foundation get worse over time. We stop the damage before it spreads and compromises your home.
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Mortar cracks, loose bricks, and failed caps let water in. We restore your chimney so it draws safely and holds up through the next season.
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Crumbling mortar is the first sign a wall is failing. We remove the old material and pack in fresh mortar that bonds properly and holds.
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Cracked or spalling brick makes walls look tired and lets moisture in. We replace and match damaged bricks so the repair is nearly invisible.
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Cracked concrete or asphalt is a curb appeal problem. Pavers give you a durable, attractive driveway that handles Ontario's heat without cracking.
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Sloped yards shift, erode, and flood. A properly built retaining wall locks the soil in place and protects your property year after year.
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Weathered masonry loses both strength and appearance. We clean, repair, and restore brick and stone structures to their original integrity.
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A wood-burning fireplace needs a solid masonry firebox and surround. We build and install them to handle real heat safely.
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Stone veneer transforms a plain exterior into something that looks like it was always there. We install it over concrete, block, or framing.
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Concrete block is the right choice when you need a wall that is strong, low-maintenance, and built to last decades.
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Block wall foundations support your home for its entire life. We build them level, plumb, and to California's structural standards.
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An outdoor kitchen built from masonry handles weather, heat, and heavy use. We design and build around your space and how you cook.
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A well-built walkway handles foot traffic and Inland Empire weather without heaving or cracking. Pavers or poured concrete - we do both.
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Privacy walls, garden borders, and property dividers built from brick last generations when the mortar and coursing are done right.
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Stone structures add character and permanence that no other material matches. We work with natural and manufactured stone for walls, steps, and accents.
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Recessed or missing mortar lets water behind the brick face. Repointing restores the seal and the appearance of your wall in one pass.
Learn MoreReach out by phone or through our contact form. Tell us what you are seeing - cracks, sticking doors, a leaning wall, or a project you want to plan. We respond within 1 business day and schedule a free on-site visit at a time that works for you. No lengthy hold times, no automated phone trees.
A mason walks the job with you, explains what they find in plain language, and identifies both what needs fixing now and what can wait. You get a written estimate before we leave - not a ballpark over the phone. If a permit is required, we handle the application on your behalf and explain what that means for the timeline.
Once you approve the estimate, we schedule the work and show up when we said we would. The crew protects your property, does the job to the agreed scope, and cleans up before leaving. At completion, we walk the finished work with you and give you written documentation of everything done - including any warranty and permit sign-off.
We hold an active California Contractors State License Board (CSLB) license for masonry work and carry full liability insurance. You can verify our license at cslb.ca.gov before you book. Every job is covered - no exceptions.
We come to your property, assess the job in person, and give you a written estimate before we leave. There is no charge for the visit and no pressure to book. Most homeowners receive their estimate the same day as the site visit.
We are a local business, not a national franchise. Our crew knows the Inland Empire's climate, soil conditions, and permit requirements from direct experience. We have served 12 cities across the region since 2020.
Every completed job comes with written warranty terms and, when applicable, a copy of the permit sign-off. You get documentation you can keep - and show a buyer if you ever sell. Unpermitted structural work is one of the most common problems in Ontario home sales.
Questions before you book? Call (909) 738-1803 or send us a message.
"We had cracks appearing in two interior walls after last winter's rains. The crew found the source at the foundation perimeter, explained exactly what was happening, and had it repaired in two days. Everything was cleaned up before they left and we got the permit paperwork the same week."
Marcus T., Rancho Cucamonga - Foundation repair
"The mortar on our chimney was well past due - we had not had it touched since we bought the house in the 90s. They repointed the whole thing, replaced the cap, and waterproofed it. The color match is good and our fireplace smells like a fireplace again, not like the outdoors."
Diane R., Upland - Chimney repair
"We had a retaining wall along the back of our yard that had been leaning for a couple of years. They rebuilt it properly, added drainage behind it, and it went in faster than I expected. The backyard finally drains the way it should when it rains."
Kevin A., Fontana - Retaining wall construction
We respond within 1 business day - no waiting, no automated runaround. This estimate is completely free and comes with no obligation to move forward. After you submit, someone from our office will call you to schedule a free on-site visit where a mason walks the job with you and gives you a written quote before leaving.
(909) 738-1803OT Ontario Masonry is based in Ontario, CA and serves 12 communities throughout the Inland Empire, including Rancho Cucamonga, Fontana, Upland, and Pomona. We aim to schedule all estimate visits within the same week of your initial contact.
Mortar is more porous than brick, so water enters through mortar joints first. In Ontario, where winter rains follow an extremely dry summer, water finds gaps that the heat cracked open - and the damage accelerates quickly once it starts.
Yes. Temperatures above 100°F cause mortar to expand and contract repeatedly, speeding up the breakdown that would take twice as long in a cooler climate. South- and west-facing walls wear fastest because they absorb the most direct afternoon sun.
After any noticeable shaking, check chimneys, retaining walls, and foundation perimeters before assuming everything is fine. The California Geological Survey notes that cumulative minor seismic events can open cracks in masonry that were already weakened by heat cycles.
For most residential walls and retaining applications, concrete block is faster to install, easier to repair section by section, and performs just as well structurally when built correctly. Poured concrete is better suited to foundations under heavy structural loads.
Well-done tuckpointing with the right mortar mix lasts 25 to 30 years under normal conditions. In Ontario's climate, choosing a mortar that is too hard for older bricks is one of the most common mistakes that shortens this lifespan significantly.
The City of Ontario Building and Safety Division requires permits for structural foundation work, retaining walls above a certain height, and chimney structural repairs. A licensed contractor pulls the permit on your behalf - and skipping it can create serious problems if you sell your home.
OT Ontario Masonry is a licensed and insured Masonry Contractor company based in Ontario, CA, serving 12 communities across the Inland Empire since 2020. Our license is issued through the California Contractors State License Board, the state authority for all contractor licensing in California. Over the years we have completed masonry repair, restoration, and construction projects across our 16 service categories - for homeowners, landlords, and property managers throughout the region. Learn more about us.
Late summer through early fall is ideal in the Inland Empire. Mortar cures best in dry conditions, and completing repairs before the rainy season protects your walls during the months when water damage is most likely.
The California Contractors State License Board lets you look up any contractor's license number in about 30 seconds. It shows license status, work category, and any filed complaints. A legitimate contractor gives you their number without hesitation.
Unpermitted structural work is one of the most common issues that surfaces during home sales in Ontario. It can stop escrow, require the work to be redone, or reduce your sale price. A licensed contractor handles the permit process - it is part of the job.
Ready to get your masonry work assessed by a licensed local contractor? Call (909) 738-1803 or request a free estimate online.
Ontario is a city of about 185,000 people in San Bernardino County, roughly 35 miles east of downtown Los Angeles. It sits in the heart of the Inland Empire and includes a wide mix of home ages - from historic neighborhoods near Euclid Avenue - a boulevard listed on the National Register of Historic Places - to mid-century ranch homes built in the 1960s and 1970s, to newer subdivisions on the city's southern and eastern edges near Ontario Mills.
The city is also home to Ontario International Airport, one of the busiest cargo airports in the western United States. Much of the surrounding residential base consists of working and middle-income homeowners with a real stake in maintaining their properties. Roughly half of Ontario's housing units are owner-occupied, according to U.S. Census data.
The Inland Empire's clay-heavy soil, intense summer heat, Santa Ana wind seasons, and occasional winter rains create a specific set of challenges for masonry - from mortar that dries out and cracks faster than it would in a cooler coastal city, to foundations that shift with the seasonal soil movement. We have worked on homes across all of Ontario's neighborhoods and know what each area's housing stock tends to need. Whether your home is a 1920s Craftsman near downtown or a 1990s stucco subdivision home near the south side, call us for a free estimate and we will tell you honestly what we find.
By appointment only, no walk-ins.
OT Ontario Masonry
422 S Bon View Ave
Ontario, CA 91761
Monday to Saturday: 8 AM to 7 PM. Sunday: 11 AM to 4 PM.
Call OT Ontario Masonry today or request a free estimate online - we respond within 1 business day and serve all of Ontario and the surrounding Inland Empire.