Monroe, LA Foundation Repair Guide: Soils & Leveling

Updated October 24, 2026. This guide is general information, not legal or engineering advice. Rules change, so confirm with the agency listed before you start work.

Quick reference

Topic	What to know	Source
Surface geology	Ouachita River backswamp and natural levee deposits; levees near Monroe are grayish brown silty clay	Louisiana Geological Survey
Local soils	Hebert series type location 4.7 mi SE of Monroe; mapped with Perry, a very-fine smectitic Vertisol	USDA NRCS soil series
Shrink-swell	Vertisols are clay-rich soils that shrink and swell with moisture and crack deeply when dry	University of Idaho soil orders
Climate	About 55.1 in. of precipitation a year; July highs average 93.2°F	NOAA 1991–2020 normals (via Wikipedia)
State registration	Home Improvement Registration for existing-home work of $7,500 or more; residential license above $50,000	LSLBC
Permits	Monroe Building Inspection Dept.; West Monroe Inspections; Police Jury permit office outside city limits	City and parish websites
Before digging	Notify Louisiana 811 at least 48 hours ahead, not counting weekends and holidays	La. R.S. 40:1749.13

What is the ground made of around Monroe?

River sediment. The Louisiana Geological Survey's surface geology map of the Monroe South quadrangle shows Holocene deposits of the Ouachita River: backswamp, described as fine-grained deposits underlying the flood basins between meander belts, and natural levee deposits flanking the river, which near Monroe are grayish brown silty clay. Older Pleistocene terrace deposits on the same map are described as silty to sandy clay and clayey sand. The survey cautions that its maps aren't a substitute for checking a specific site.

USDA soil descriptions fill in the picture. The Hebert series, a silty levee soil, has its type location in Ouachita Parish about 4.7 miles southeast of Monroe on Highway 15, and USDA lists Perry among the soils mapped with it. Perry is classified as very-fine, smectitic Chromic Epiaquerts: a Vertisol formed in clayey backswamp alluvium in Louisiana and Arkansas. The Sterlington series, named for the town north of Monroe, is a coarse-silty levee soil with its type location southeast of Sterlington on US 165.

Why does that clay move houses?

Vertisols are clay-rich soils that shrink and swell as their moisture changes. In dry periods they shrink and open deep, wide cracks that later close again, and that action creates serious engineering problems for anything built on them.

Monroe's weather keeps the cycle going. Under the 1991 to 2020 normals, Monroe Regional Airport averages about 55.1 inches of precipitation a year, and July's average high is 93.2°F. Wet months swell the clay; hot, dry stretches shrink it. Because a house's sides get different sun, roof runoff and tree roots, the ground under it rarely moves evenly.

Settlement, heave or seasonal movement?

Settlement is part of the foundation going down, usually where soil dried out, was poorly compacted, or was washed out. Supports or piers are the usual repair.
Heave is part of the foundation coming up, often the middle of a slab or a spot under a raised house, when soil gets wetter than it was, as from a plumbing leak. Finding the water is the fix, not more piers.
Seasonal movement is the house rising and falling with wet and dry months. Even moisture around the house reduces it.

Elevation readings, ideally repeated in a different season, are how a contractor or engineer tells them apart.

How do raised and slab repairs differ?

Raised or pier-and-beam houses are usually leveled from the crawl space by jacking low areas, re-shimming, adding or replacing interior piers, and repairing sills and beams that have softened from moisture. They can be readjusted later as the soil moves. See house leveling. Slab houses that have settled are usually supported with piers under the perimeter beam, chosen from pressed concrete, steel push or helical systems. See pier types. For both, water control around the house is part of a lasting repair.

Does Louisiana license foundation contractors?

The Louisiana State Licensing Board for Contractors (LSLBC) sets dollar thresholds that include labor and materials. Work on an existing residential structure with a project value of $7,500 or more requires a Home Improvement Registration; residential construction or work over $50,000 requires a residential license. The Governor's office advises looking contractors up with the LSLBC's contractor search and getting a written contract up front. Keep that contract and every invoice.

Who issues permits?

Inside Monroe, the City of Monroe Building Inspection Department issues building and trade permits and inspects residential work. In West Monroe, the city's Inspections office at 2305 N 7th Street issues permits; the city adopted the Louisiana State Uniform Construction Code in 2007. Outside city limits, the Ouachita Parish Police Jury permit office issues building and culvert permits and handles floodplain management. Towns such as Sterlington handle their own.

Piering and drain lines mean digging. Louisiana's Dig Law requires the excavator to notify Louisiana 811 at least 48 hours before starting, excluding weekends and holidays. Your contractor should do this.

How should I compare bids?

A floor elevation map and a plain explanation of what's moving and why
A drawing of every pier or support, with type and spacing
For raised houses, what wood repair is included and what happens if more rot turns up
Whether you'll get a pier log with depth and pressure or torque
What drainage work is included or recommended
Proof of LSLBC registration or license, and who pulls the permit
Warranty terms: length, what's covered, readjustments, and transfer to a buyer

If bids disagree sharply or the job is large, an engineer's independent evaluation can be worth the fee. Verify the engineer with the Louisiana Professional Engineering and Land Surveying Board.

What can I do myself?

Keep gutters clear and carry downspouts well away from the foundation
Make sure the ground falls away from the house on every side
Keep crawl space vents and drains clear on a raised house
Watch for unexplained jumps in your water bill
Keep a dated log of cracks and sticking doors

Common questions

Why do so many Monroe-area houses have foundation problems?

Much of the ground is Ouachita River sediment, including smectitic clays that shrink when dry and swell when wet, and Monroe averages about 55 inches of precipitation a year. That wet-dry cycle moves houses unevenly.

Does a foundation repair company need a license in Louisiana?

Under LSLBC rules, work on an existing home valued at $7,500 or more needs a Home Improvement Registration, and residential work over $50,000 needs a residential license. Look the company up on the LSLBC contractor search.

Do I need a permit for foundation repair in Ouachita Parish?

Ask the permit office for your address: City of Monroe Building Inspection, West Monroe Inspections, your town hall, or the Ouachita Parish Police Jury permit office for unincorporated areas.

Monroe, Louisiana foundation repair guide (2026)