River bottom · Pecan Grove, Texas
Foundation Repair in Pecan Grove, TX
The strongest clay in our study next to sandy river ground, behind a levee run by a utility district.
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In Pecan Grove, the ground can change from one block to the next. Two of our 25 sample spots landed on Pledger clay, which reads 19 on the USDA's shrink-swell scale, the highest reading in all 22 towns we studied. Two others landed on sandy river ground that reads 1.5. All four sit on river deposits, about a mile apart on our grid.
So before you read too much into a crack, it's worth knowing which of those grounds your house sits on. If you're weighing foundation repair in Pecan Grove, here's what the public records say about the soil, the levee, the homes and the rules.
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The Ground Under Pecan Grove
On the state geologic map, 19 of our 25 Pecan Grove spots fell on river deposits. The other 6 fell on the Beaumont Formation of the coastal prairie, 4 of them along the northern edge of our grid. In the soil survey, the 24 spots that landed on land split like this:
- 11 very high. Brazoria clay covers 7, reading 17 in every layer down to about 80 inches. Pledger clay covers 2 at 19, and Lake Charles clay 2 at 13.6.
- 4 high. Bernard (7.3) covers 2, and Belk clay and a Clemville soil (7.5) one each.
- 9 moderate or low. Norwood covers 4, reading 5.0 or 5.9 in one thin layer and much less above it. Asa (4.5) and sandy alluvial land (1.5) cover 2 each, and one Bernard spot sits in a map unit whose survey reading doesn't match its clay.
That mix is the story. The USDA says Pledger, when dry, opens cracks more than 0.4 inches wide that run 20 to 50 inches down, and that water pours in through them, then barely moves once the clay is wet. A Pledger lot and a sandy lot can behave very differently in the same summer.
On clay that active, a repair's depth matters. The Foundation Performance Association, a Houston-area group of engineers and repair firms, warns that piles not driven deep enough below the soil's active zone can keep settling. It's fair to ask any company how deep it plans to go on your lot, and why. The USDA's Web Soil Survey, a free federal map, shows which soil your lot is on. Our soil guide explains the names.
Flood Zones in Pecan Grove
We checked FEMA's flood map at all 25 spots. Of those, 10 fell inside the 1% annual chance floodplain. Another 4 sit in an area FEMA labels as having reduced flood risk due to a levee, and 3 in its moderate zone, between the 1% and 0.2% floods. The remaining 8 fell in the area of minimal flood hazard.
Pecan Grove's levee is unusual. It belongs to Pecan Grove Municipal Utility District, not a levee improvement district. The district says it was created in 1975, lies wholly in Richmond's extraterritorial jurisdiction, and is "somewhat unique" for including a levee system. It names Pecan Grove Plantation, The Grove, The Greens, Plantation Place, Pecan Lakes and The Terrace at Pecan Grove as its subdivisions.
FEMA's view of any levee is the same: it lowers the risk of flooding but doesn't remove it. The National Weather Service's guidance for the Brazos at Richmond says that at 53 feet, FM 359 becomes impassable between US 90A and the Pecan Grove levee. Our flood zones guide walks through FEMA's map for your own address.
Pecan Grove Homes by Decade
The Census counts 8,779 homes in Pecan Grove, and the median one was built in 1995. The 1980s stand out:
- Before 1960: 0.8%
- 1960s: 0.2%
- 1970s: 2.0%
- 1980s: 37.1%
- 1990s: 18.9%
- 2000s: 14.0%
- 2010s: 19.0%
- 2020 or later: 7.9%
Only Mission Bend, among the 22 towns we studied, has a bigger share of 1980s homes. A Pecan Grove slab from that decade has been through about 40 years of river clay drying out and soaking up again. Building picked up again lately, too: 7.9% of homes date from 2020 or later, one of the higher shares in our study.
The Census records when each house went up, not how it was built. On a house this age, though, the history of a crack matters as much as its size. HUD's rehab inspection guide says a crack that tapers from wide to hairline often points to faster settlement, while seasonal cracks open and close. A foundation inspection puts numbers on it.
- 1995Median year Pecan Grove homes were built
- 0.8%Built before 1960
- 59.8%Built in 1990 or later
Source: US Census Bureau, American Community Survey 5-year estimates, 2023.
Permits and Rules in Pecan Grove
Pecan Grove isn't a city. Being in Richmond's extraterritorial jurisdiction doesn't put a house inside Richmond's city limits, so Fort Bend County's rules apply. The county has adopted no building code for single-family homes. It requires a Development Permit for building modifications and any work within the 100-year floodplain: $100, or $150 in a floodplain, doubled if work starts first.
Whether a slab repair counts as a building modification, the county doesn't say. With 10 of our 25 Pecan Grove spots in the floodplain, it's worth asking County Engineering (281-633-7500, Permits@fbctx.gov) before any work. The permits guide sets the nearby towns' rules side by side.
Watering Rules in Pecan Grove
Fort Bend County doesn't supply water, and several utility districts serve the Pecan Grove area. Check which one sends your bill.
Pecan Grove MUD's own drought plan, from 2013, is stricter than most. It never mentions foundations, and it has no exception for a hand-held hose:
- Stage II: all outdoor water use is limited to two days a week by address, and banned from 6 to 10 a.m. and from 6 p.m. to midnight.
- Stage III: all outdoor water use is banned, hand watering included.
The plan is old, so confirm it with the district. If it still stands, the time to keep the clay around your slab evenly moist is before a drought reaches Stage III. Our watering guide suggests how to judge the amount.
Foundation Repair Services in Pecan Grove
- Slab foundation repair For slabs on Brazoria and Pledger clay
- Pier and beam repair For raised floors over a crawl space
- House leveling When the floors have gone out of level
- Foundation inspection To get readings first
- Foundation crack repair To tell a seasonal crack from a structural one
Pecan Grove Questions
Is Pecan Grove part of Richmond?
No. Pecan Grove MUD says it lies in Richmond's extraterritorial jurisdiction, which is outside the city limits. For building and flood permits, Fort Bend County's rules apply.
Does the levee mean my Pecan Grove house can't flood?
No. FEMA says levees reduce flood risk but don't eliminate it. Your own address on FEMA's map is the one to check.
Can I hand-water my foundation in a Pecan Grove drought?
That depends on your district. Pecan Grove MUD's 2013 plan bans all outdoor water use in Stage III, hand watering included. Other districts' plans differ.
Nearby Towns on the Same Ground
We serve Pecan Grove and the towns around it, including Richmond, Mission Bend, Sugar Land, Rosenberg and Cinco Ranch.
Richmond, just south, shares Pecan Grove's river clay, Pledger included, and is a city with a published $50.00 foundation repair permit. Sugar Land, to the east, is on the same Brazoria clay. See all service areas.
Get a Free Foundation Inspection in Pecan Grove
Tell us what's changed in your Pecan Grove home. A foundation repair company that knows the area will measure the floors and go over the results with you. It's free, and nobody will press you to book a repair.
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