Serving Claremont, CA and surrounding areas. (909) 788-2977
Claremont Concrete & Masonry is the masonry contractor Ontario homeowners call for foundation repair, block walls, brick work, and retaining walls - serving Ontario and the broader Inland Empire since 2016 with responses within one business day.
Ontario sits on clay-heavy soils that expand and contract with every wet-dry cycle, and that movement cracks slab foundations across all ages of the city's housing stock. Our foundation repair work addresses the actual cause of the cracking - not just the visible surface symptoms - so the repair holds through Ontario's seasonal soil movement.
Block walls are the standard property boundary and backyard fence in Ontario, and the ones built in the 1960s through 1980s are at the end of their lifespan. We rebuild and repair aging CMU walls throughout the city, including the mortar joints and cap block that fail first in Ontario's heat and UV exposure.
The older homes near downtown Ontario and Euclid Avenue were built with original brick that has endured nearly a century of Inland Empire heat cycles. We match existing brick profiles and replace spalled units before the wall face deteriorates further, preserving the character of these historic properties.
Ontario's varied terrain - flat near the airport, sloping in older northern neighborhoods - creates demand for retaining walls across a wide range of lot types. We build walls that account for the clay soil behavior here, with drainage details that prevent hydrostatic pressure from pushing the wall over during the first heavy rain season.
Ontario regularly sees summer highs above 100 degrees, and that kind of sustained heat dries out mortar joints faster than almost anywhere else in the region. Tuckpointing the deteriorated joints on older Ontario homes before they widen is far less expensive than addressing water damage in the wall cavity after the winter rains arrive.
Ranch-style homes in Ontario's mid-century neighborhoods typically have concrete driveways that are cracked and uneven after decades of clay soil movement. Paver replacements hold up better to this ground movement than a plain concrete pour because individual units can flex slightly without cracking, and damaged sections can be replaced without tearing out the entire surface.
Ontario is a large city with homes ranging from 1920s bungalows near downtown to 2000s stucco subdivisions on the south side, and each era of construction carries its own masonry challenges. The homes nearest to Euclid Avenue - Ontario's historic tree-lined boulevard listed on the National Register of Historic Places - were often built with original brick and lime-based mortar that cannot simply be repointed with modern Portland cement. Using a mortar that is harder than the original brick transfers stress into the brick face rather than the joint, which causes spalling that damages the original units and is costly to reverse. A contractor who does not understand this distinction will inadvertently worsen the very problem they are hired to fix.
The climate compounds the maintenance burden. Ontario summers regularly reach 100 degrees or higher - among the hottest conditions in the Inland Empire - and the UV exposure at this inland elevation is intense enough to degrade stucco coatings, exterior caulk, and mortar joints faster than homeowners expect. The clay soils common throughout the city expand when winter rains arrive and shrink through the dry months, which is why driveways crack, block walls tilt, and foundations shift on properties that look otherwise well-maintained. Fall brings Santa Ana wind events that can exceed 60 mph, pulling at loose mortar, knocking over aging block walls, and stripping roofing from homes that have not been inspected recently.
Our crew works throughout Ontario regularly, and we understand the local conditions that affect masonry work here. Structural masonry projects in Ontario require permits from the City of Ontario Building and Safety Division, and we are familiar with the process and requirements before we quote a job.
Ontario is one of the larger Inland Empire cities, and the neighborhood you are in tells us a lot about what to expect before we arrive. The historic streets near Euclid Avenue tend to have original brick and older stucco that requires careful material matching. The ranch-home neighborhoods from the 1960s and 1970s are where most of our block wall and flatwork calls come from. The newer subdivisions on the south side near Ontario Mills are now 20 to 30 years old and showing the first signs of foundation and driveway cracking that comes with clay soil movement.
We also serve the communities surrounding Ontario. Homeowners in Upland to the north call us regularly for retaining wall and driveway work on properties with similar soil conditions. To the east, Montclair homeowners in the postwar neighborhoods along Central Avenue face the same concrete and block wall issues we handle throughout Ontario.
Call or submit a request online and we will follow up within one business day. We gather basic details about the project type and location so we can arrive prepared for the site visit.
We visit your Ontario property to assess the work in person - examining soil conditions, access, and the actual scope of what needs to be done. Written estimates are itemized so you can see exactly what each part of the job costs before you decide anything.
After you approve the estimate, we schedule a start date and pull any permits required by the City of Ontario. We give you a clear timeline and let you know whether you need to be present for any part of the work.
We clean up the work area at the end of each day and walk through the completed job with you before we close out. Any concerns are addressed on the spot - not after the crew has left the city.
We serve all of Ontario, CA. Free estimates, no pressure, responses within one business day.
(909) 788-2977Ontario is a city of approximately 185,000 people in San Bernardino County, sitting roughly 35 miles east of downtown Los Angeles in the heart of the Inland Empire. The city has a recognizable historic core near Euclid Avenue, Ontario's famous historic boulevard lined with a double row of pepper trees that dates back to the late 1800s. Moving outward from that core, the city transitions through mid-century ranch-home neighborhoods from the 1960s and 1970s into newer stucco subdivisions built in the 1990s and 2000s near the south and east edges of the city.
Ontario International Airport and Ontario Mills make the city one of the most recognizable in the Inland Empire, but most of what we see on job sites here is in the older residential streets - homes that have been owner-occupied for decades and carry the maintenance backlog that comes with that age. The city shares its western border with neighboring Montclair, and the housing character and soil conditions are similar across both cities, making it common for us to work in both in the same week.
Restore structural stability and stop foundation damage before it spreads.
Learn MoreFix cracks, spalling, and mortar deterioration for a safe, weathertight chimney.
Learn MoreReplace deteriorated mortar joints to protect and extend the life of your masonry.
Learn MoreRebuild or replace damaged bricks to restore appearance and structural integrity.
Learn MoreInstall durable, attractive pavers that enhance curb appeal and withstand heavy use.
Learn MoreBuild strong retaining walls that control erosion and transform sloped terrain.
Learn MoreCustom-built fireplaces designed for safety, efficiency, and lasting style.
Learn MoreConstruct solid, low-maintenance block walls for privacy, security, and boundaries.
Learn MoreCreate a level, load-bearing block foundation for new and existing structures.
Learn MoreBuild custom outdoor kitchens in stone and brick for year-round entertaining.
Learn MoreDesign and install durable walkways that guide guests and enhance landscaping.
Learn MoreLay custom brick walls that add character, privacy, and lasting value.
Learn MoreRepoint worn mortar joints to prevent water intrusion and preserve your brickwork.
Learn MoreCall us or submit a request online - we respond within one business day and provide free, itemized estimates for all masonry and concrete work in Ontario, CA.
