Foundation repair, concrete repair and crawl space repair in Rancho Santa Margarita, CA
Rancho Santa Margarita has about 16,798 households and 9,370 detached single family homes, and Foundation, concrete and crawl space repair is what we are called out for here. The crew comes from our Irvine office, about 20 minutes away.
Let's take the first step toward solid ground.
A local specialist will evaluate your foundation, walk you through the findings, and send a clear estimate. No cost, no pressure.
Irvine office
9891 Irvine Center Dr
Irvine, CA 92618
Phone
(877) 360-9227Hours
Monday to Friday, 7:00 AM to 6:30 PM
Getting to you
About 20 minutes from the office, 8 miles.
About Rancho Santa Margarita
How Rancho Santa Margarita is built
Rancho Santa Margarita sits in Orange County, California. Census figures put the town at about 47,702 residents and 16,798 households. 73 percent of occupied homes are owner occupied, and 9,370 of them are detached single family houses.
The crew that covers Rancho Santa Margarita works out of our Irvine office, 8 miles away, about 20 minutes on the road. Countywide, Orange County holds 563,953 detached single family homes and runs 56 percent owner occupied. This town accounts for about 1 percent of the county's housing. Orange County holds about 3,164,063 people and 1,138,473 housing units in total. Building peaked in the 1990s at 9,268 homes, which is why the median year built sits at 1992. The survey reports a median home value of $861,100 and a median household income of $150,146. 12,240 of those homes are lived in by their owners and 4,558 are rented.
Population and housing figures: American Community Survey, by way of the Signature Media market data set.
What we fix
Foundation problems we see in Rancho Santa Margarita
Sticking Doors and Windows
The USDA sample inside Rancho Santa Margarita rates shrink swell potential low. Ground that does not swell much can still move: it settles, and it moves fastest where water is allowed to collect against a footing.
What this looks likeCracked Bricks
Of the housing here, 796 homes predate 1980, with the biggest block of it going up in the 1990s. Original drainage is usually the story on those.
What this looks likeUneven Floors
The typical Rancho Santa Margarita house dates to 1992, so the ground under it has been carrying the house, and taking in irrigation and storm water, ever since.
What this looks likeLocal conditions
Rancho Santa Margarita's soil, weather and housing
- Precipitation a year
- 12.7 in
Based on NOAA 1991 to 2020 climate normals for the Laguna Beach weather station, about 12 miles away.
The soil, and what it does
The survey inside the city limits reads as urban fill rather than a natural series, which is normal for ground this built up, so for the soil series the county survey is the reading: across Orange County the USDA survey is Cieneba at about 11 percent of the survey, with Myford and Calleguas alongside it. Broken down by texture it is 42 percent clay, 7 percent silt and 14 percent sand. For swelling and shrinking, the city sample is the more specific reading. Inside the Rancho Santa Margarita city limits it gives a weighted linear extensibility of 2.62 percent, which USDA reads as low shrink swell potential.
The housing stock
The typical house dates to 1992, and the single biggest block of the stock, 9,268 homes, went up in the 1990s. The 796 homes finished before 1980 are the ones where drainage was rarely engineered and backfill was rarely compacted. 21 percent of the housing here, 3,528 units, sits in buildings of five or more, so a fair share of local work is on shared structures rather than single family homes. Of the owner occupied homes, 84 percent carry a mortgage.
Soil survey: USDA NRCS Soil Data Access (SSURGO), sdmdataaccess.nrcs.usda.gov. Climate: NOAA U.S. Climate Normals 1991 to 2020, LAGUNA BEACH (USC00044647), retrieved October 18, 2026.
Around Rancho Santa Margarita: Landmarks inside the city limits include Altisima Park & Pool, Arroyo Vista Park, Central Park, Rancho Santa Margarita Lake Park and Solana Park. They sit between 6 and 8 miles from our Irvine office.
The city covers ZIP codes 92678, 92679, 92688, 92692.
Services available
Foundation repair near you in Rancho Santa Margarita
Foundation Repair in Rancho Santa Margarita
Helical piers, push piers, crack repair, and the diagnosis that decides between them.
Concrete Repair in Rancho Santa Margarita
Lifting, leveling and crack repair for driveways, patios, walkways and pool decks.
Crawl Space Repair in Rancho Santa Margarita
Structural repair under a raised foundation: posts, pads, beams and sagging floors.
One visit covers all of it: floor elevation measurements, clear findings, a written estimate.
Google reviews
What California customers say
Brian was friendly and professional. He measured every part of my house, exterior and interior - and concluded there was no problem with my foundation. Thanks Brian
I had Dalinghaus Construction out for a free consultation to check out some cracks in my ceiling, which I feared were based on foundation issues. Tom came from California and was so thorough in examining everything, testing the level of the floor throughout the house, walking the perimeter, and checking for other symptoms. Luckily, it wasn’t a foundation issue. Even though it was a free consultation, I felt like I should pay because he was so thorough. It made me realize how much integrity this company has. I highly recommend this company as trusted professionals that have the competence and integrity to get the job done correctly. I hope I never have foundation issues, but I certainly know who to call if I do!
I was onsite today to haul away broken concrete and debris, and I was genuinely impressed by Dillon and his crew. The jobsite was extremely clean, organized, and run with a high level of professionalism. Dillon took the time to walk me through the foundation repair work they were doing and explained everything clearly. What stood out most was the teamwork. The guys even helped load the concrete and trash into my truck. Top-notch crew, great attitudes, and quality work. I’d confidently recommend Dillon and his team to anyone needing foundation repair.
The crew
Some of the crew members who work on jobs like yours






The same company schedules the evaluation, runs the install, and answers a warranty call later.
Irvine office
Where the crew comes from
Our nearest office is in Irvine, 8 miles out and about 20 minutes on the road. You will find it at 9891 Irvine Center Dr, Irvine, CA 92618.
- 9891 Irvine Center Dr, Irvine, CA 92618
- (877) 360-9227
- Monday to Friday, 7:00 AM to 6:30 PM
What Rancho Santa Margarita homeowners ask
Don't see your question here? Our team is happy to help. Reach out anytime.
Rancho Santa Margarita is worked out of our Irvine, CA office. It is 8 miles from the middle of town, about 20 minutes on the road. The office is at 9891 Irvine Center Dr, Irvine, CA 92618.
The nearest towns to Rancho Santa Margarita we also cover
Get a free evaluation. We will come and look.
A Dalinghaus specialist evaluates your foundation in Rancho Santa Margarita, takes floor elevation measurements, walks you through what they found, and sends a clear itemized repair estimate. No pressure.
Care and expertise from a team that's been doing this since 2011.
Dalinghaus Foundation Repair is locally owned and operated, with crews dedicated exclusively to foundation, concrete, and crawl space work across California, Arizona, and Nevada.
Foundation repair, concrete leveling, and crawl space repair are our entire focus. Not a sideline.
More than 2,000 projects on the clay and desert soils of California, Arizona, and Nevada since 2011.
CSLB License #983851 in California, ROC #330307 in Arizona, and License #0089738 in Nevada. Look us up with the state before we ever set foot on your property.
Warranty terms come in writing with every proposal, and the terms that apply to your job are stated in that job's paperwork. Ask your project specialist during the free evaluation.
Take the first step toward a healthy home.
A straightforward path from free evaluation to completed repairs.
Schedule your free evaluation.
A local specialist visits your home, evaluates the foundation, and answers your questions on site. No cost, no obligation.
Receive an estimate based on your needs.
We provide a clear, written estimate with a scope of work tailored to your home's specific issues.
Get your repairs.
Our crews complete the work on schedule, with the findings and scope in writing from the first visit.
More than 1,000 Google reviews across our offices, averaging 4.9 stars.
A 4.9-star average across Google, with verified reviews from the homeowners we work for.
Start with a free evaluation.
Share a few details and a local specialist will follow up as soon as possible to set your evaluation.
- A local foundation specialist on site
- A complete walk-through of the findings
- A clear written estimate at no cost
- No obligation, no pressure