Rancho Santa Margarita, CA Orange County

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.

4.9
1,000+ Google reviews
2,000+
Projects since 2011
47,702
People in Rancho Santa Margarita
(877) 360-9227
Southern California · Arizona · Nevada Since 2011

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.

Licensed Contractor
1,000+ Google Reviews
CA Lic. #983851 · AZ ROC #330307 · NV Lic. #0089738

Irvine office

9891 Irvine Center Dr

Irvine, CA 92618

Hours

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.

Local conditions

Why foundations move in Rancho Santa Margarita

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.

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.

Google reviews

What California customers say

Received a estimate for foundation repair Mark was very informative and did a great thorough job! Would definitely hire him when we are ready to do the work.
TheAugust 2026via Google
Dalinghaus was hired to stabilize 4 tilt up panels that were sinking. They did a great job! The poly injection was clean and exactly as described.
MikeFebruary 2026via Google
So incredibly helpful! Tom was prompt, professional and thorough. He took the time to clearly explain measurements and answered my questions in detail. I have peace of mind in my path from here. I’m so grateful for Tom and the team at Dalinghaus!
JessieNovember 2025via Google

The crew

Some of the crew members who work on jobs like yours

Dillon Pich, Project Manager
Dillon Pich
Project Manager
Isaac Garcia, Apprentice
Isaac Garcia
Apprentice
James Rodriguez, Senior Superintendent
James Rodriguez
Senior Superintendent
Joe Delgado, Foreman
Joe Delgado
Foreman
Jose Guerrero, Project Specialist
Jose Guerrero
Project Specialist
Julian Gonzalez Tapia, Foundation Repair Specialist
Julian Gonzalez Tapia
Foundation Repair Specialist

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
Dalinghaus Foundation Repair
Irvine office
9891 Irvine Center Dr, Irvine, CA 92618
Dispatching crews across Orange County
Rancho Santa Margarita questions

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.

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.

(877) 360-9227
Why Choose Dalinghaus

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.

01
Specialized expertise.

Foundation repair, concrete leveling, and crawl space repair are our entire focus. Not a sideline.

02
Locally owned since 2011.

More than 2,000 projects on the clay and desert soils of California, Arizona, and Nevada since 2011.

03
Licensed in California, Arizona and Nevada.

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.

04
Warrantied solutions.

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.

Brian Dalinghaus, co-founder of Dalinghaus Foundation Repair
Brian Dalinghaus CO-FOUNDER · SINCE 2011
Brad Dalinghaus, co-founder of Dalinghaus Foundation Repair
Brad Dalinghaus CO-FOUNDER · SINCE 2011
Our Process

Take the first step toward a healthy home.

A straightforward path from free evaluation to completed repairs.

Step 01

Schedule your free evaluation.

A local specialist visits your home, evaluates the foundation, and answers your questions on site. No cost, no obligation.

Step 02

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.

Step 03

Get your repairs.

Our crews complete the work on schedule, with the findings and scope in writing from the first visit.

Customer Reviews

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.

Free Evaluation

Start with a free evaluation.

Share a few details and a local specialist will follow up as soon as possible to set your evaluation.

What to expect
  • A local foundation specialist on site
  • A complete walk-through of the findings
  • A clear written estimate at no cost
  • No obligation, no pressure
Prefer to call
877-360-9227
Southern California · Arizona · NevadaSince 2011
Dalinghaus Foundation Repair

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.

Licensed Contractor
1,000+ Google Reviews
CA Lic. #983851 · AZ ROC #330307 · NV Lic. #0089738
Southern California · Arizona · Nevada Since 2011

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.

Licensed Contractor
1,000+ Google Reviews
CA Lic. #983851 · AZ ROC #330307 · NV Lic. #0089738