East band · Frisco, Texas
Foundation Repair in Frisco, TX
Black clay or a thin layer over chalk, with very little in between: what Frisco's ground means for a young house.
Frisco has 77,787 homes, the Census says, more than any other town we studied around Denton, and most went up after 2000. If yours is one of them and a crack has just appeared, you're probably wondering how a house that new can already be moving. When it comes to foundation repair in Frisco, the ground has a lot to do with it.
- Free inspection
- No obligation
- Town-by-town soil data
- Referral service, disclosed
- Call (940) 535-7201
What have you seen?
Every one of our 25 Frisco sample points landed on the rock of the east band, the only town in our study where that happened. The soil on top is either very high clay or a thin layer over chalk. Below, the public records, one by one, with what each tells you about your house.
The Ground Under Frisco
On the state geologic map, 56% of our Frisco points landed on the Eagle Ford Formation, a black shale, and the other 44% on the Austin Chalk. Texas Parks and Wildlife says the Blackland Prairie's chalks, marls and shales gave rise to "black, calcareous, alkaline, heavy clay soils."
The USDA soil survey shows how true that is in Frisco. Of our 25 points, 21 fell on soil rated very high for shrink and swell. That's 84%, and no point landed on soil in the high band just below it. These are the soils we found:
- Houston Black clay, 12 points. At 11 of them, it reads 12 on the USDA scale from the surface down to 80 inches, with no rock. It's 54% clay. At the twelfth, an eroded version in Collin County's survey reads 17.
- Heiden clay, 6 points. It reads about 12 down to about 58 inches, where the survey finds dense material.
- Branyon clay, 3 points. It reads 9.9 in its top foot, then 13 down to 80 inches.
- Stephen silty clay, 3 points. It formed on chalk. It reads 4.5 in its top 9 inches, then 1.2, with soft bedrock about 15 inches down.
- Eddy gravelly clay loam, 1 point. Also formed on chalk, it reads 1.5 and reaches soft bedrock about 6 inches down.
A reading of 9 or more counts as very high, and the USDA says that once a soil rates moderate or higher, "shrinking and swelling can damage buildings."
So Frisco's ground comes in two kinds. Most of our points sit on deep clay that swells when it's wet and shrinks when it dries. A few sit on a few inches of soil over chalk, which reads far lower. A crack means something different on each, and a repair plan for one may not suit the other. To find out which kind is under yours, try the lookup in our soil and rock guide.
Frisco also crosses a county line. On the Census county map, 15 of our 25 points fell in Collin County and the rest in Denton County.
Frisco Homes by Decade
The median Frisco home was built in 2009, the Census says. The 2010s brought 40.3% of the town's homes and the 2000s another 34.8%. The 1990s added 14.7%, and 4.6% have gone up since 2020. Only 0.7% are older than 1960.
A build year doesn't say what's under the floor. Still, a Texas house this young is more likely to sit on a slab than on piers. The Post-Tensioning Institute says its design method for slabs on expansive soil has been used on millions of homes since 1980, and many of these slabs have steel cables pulled tight inside. If yours does, nobody should cut or drill into it until the cables are found. A stamp in the garage floor is a common place for a notice.
Age matters when you read a crack too. HUD's rehab inspection guide says a half-inch crack in a new building can mean fast settling, but very slow movement in one that's 50 years old. In a house from the 2000s or 2010s, a crack that keeps growing deserves a prompt look.
- 2009Median year Frisco homes were built
- 0.7%Built before 1960
- 94.4%Built in 1990 or later
Source: US Census Bureau, American Community Survey 5-year estimates, 2023.
Permits and Rules in Frisco
Frisco spells out what a foundation repair permit takes. The application goes in online as a residential building permit, under "Other Home Improvements," with:
- A stamped engineer letter.
- Stamped pier drawings.
- An engineer's inspection report when the work is done.
The city's fee schedule, effective October 1, 2026, lists $75 for a foundation repair permit. The city adds that some subdivisions require HOA approval, so check with yours before work is booked.
That works in your favor. An engineer designs the pier layout and checks the work at the end. Texas doesn't license foundation repair companies, so the engineer's stamp is the main check built into the job.
Watering Rules in Frisco
Frisco ties lawn watering to your trash day:
- Spring and fall: lawns once a week on your regular trash collection day.
- Summer, June 1 to August 31: once a week on trash day, with a second day allowed only to split your weekly watering time.
- Winter, November 1 to March 31: hand watering with a hose and shut-off nozzle, drip irrigation and bubblers, up to 2 hours a day when the weather calls for it.
Watering isn't allowed during rain, below 40°F or when water runs into the street. Frisco's schedule page doesn't mention soaker hoses or foundations, so ask the city before you set one up.
Why bother? The Texas engineers' guidelines favor soil moisture that stays near even on all sides of a house, and they caution against overwatering. On clay that reads 12, even moisture is part of looking after the foundation.
Frisco's own NOAA station averages 42.08 inches of rain a year, the most of the six stations we checked. Its wettest months are May, at 5.31 inches, and October, at 4.97. Our watering guide covers how to go about it.
Lake and Flood Notes for Frisco
None of our 25 Frisco points fell inside FEMA's 1%-annual-chance floodplain. That doesn't mean Frisco has no floodplain. Our points are more than a mile apart and can easily miss a creek. To check your own address, look it up on FEMA's Flood Map Service Center.
Foundation Repair Services in Frisco
- Foundation inspection to measure a young slab and keep the readings as a baseline
- Slab foundation repair for slabs on Houston Black, Heiden and Branyon clay
- Foundation crack repair to read a crack in a house built since 2000
- House leveling when floors slope across a room
- Pier and beam repair for raised floors over a crawl space
Frisco Foundation Repair Questions
My Frisco house is only 15 years old. Can it already be moving?
It can. On clay that reads 12 from the surface down, a slab can rise and fall with the seasons. The Texas guidelines also point out that new foundations aren't built dead level, so a low spot isn't always movement. Two sets of floor readings, taken months apart, tell you which it is.
Does a foundation repair in Frisco need an engineer?
Yes. The city asks for a stamped engineer letter and stamped pier drawings with the permit, and an engineer's inspection report at the end.
Do I need my HOA's OK?
Maybe. Frisco says some subdivisions require HOA approval for foundation work, so ask your HOA before work is booked.
Is my house on the chalk or the clay?
Most of our Frisco points were on deep clay, and 4 of 25 were on thin soil over chalk. Type your address into the USDA's Web Soil Survey and it lists the soil names; our soil guide says which is which.
Nearby Towns in the Same Band
Close by on the east band: Little Elm (85.7% of land points high or very high), about 6 miles away, and The Colony (94.7%), about 6 and a half. Prosper, just north, came in at 84%. Lewisville sits mostly on river deposits, but its soil reads high too. See all service areas.
Get a Free Foundation Inspection in Frisco
A young house on very active clay is worth measuring early. Tell us what you've noticed. A foundation repair company that works in Frisco can check the floors and talk you through the numbers, at no cost and with nothing to sign.
What have you seen?