Foundation repair guide
Home Sinking, Leaning or Cracking
Foundation problems are scary, but most are fixable. Here's how to read the warning signs, understand what's serious, and know when to call a specialist.
This guide is for informational purposes only and does not constitute structural or engineering advice. Always consult a licensed structural engineer or foundation specialist for a professional assessment.
Warning Signs You Should Never Ignore
Not every crack means your house is falling down — but some do. Here's how to tell the difference.
Act now — get a professional assessment
Diagonal cracks running from the corners of doors or windows
These indicate differential settlement — one part of your foundation is sinking faster than another. Get a professional assessment.
Horizontal cracks in basement or retaining walls
Horizontal cracks signal lateral soil pressure and are among the most dangerous foundation issues. Do not delay.
Doors or windows that suddenly stick, jam, or won't close properly
When your frame shifts, doors and windows bind. If this appeared suddenly or is getting worse, it's a foundation signal.
Floors that slope, bounce, or feel uneven underfoot
Sloping floors in a slab home often mean the slab is settling. In a pier-and-beam home, it may mean failing piers or rotted beams.
Gaps between walls and the ceiling or floor
Separation at wall-ceiling or wall-floor joints means the structure is moving. This is not cosmetic.
Monitor — watch for changes
Hairline vertical cracks in poured concrete walls
Small vertical cracks from concrete curing are common and usually cosmetic. Monitor them — if they widen or grow, call a pro.
Minor stair-step cracks in brick or block
Small stair-step cracks in mortar joints are often normal settling. Watch for widening, displacement, or water intrusion.
Water seeping through basement walls after rain
Water intrusion alone may be a drainage issue rather than structural, but it can accelerate foundation damage if left untreated.
Foundation Types and Their Common Problems
Concrete Slab
Poured directly on the ground. Common in warm climates.
Cracking from soil movement, tree roots, or poor drainage. Slab leaks from plumbing beneath.
Basement Foundation
Full or partial below-grade living space. Common in northern states.
Horizontal wall cracks from soil pressure, water intrusion, bowing walls, and efflorescence.
Crawl Space
Raised foundation with accessible but unfinished space below.
Wood rot, mold, pest damage, sagging floors, and moisture problems from poor ventilation.
Pier and Beam
Home sits on concrete or wood piers above grade. Common in older homes and flood-prone areas.
Settling or failing piers, rotted beams, and uneven floors.
Common Foundation Repair Methods
Costs vary by region, soil conditions, and severity of damage. These ranges reflect typical US market rates as of 2026 — use them as a benchmark when comparing quotes.
Piering / Underpinning
$1,000–$3,000 per pier
Slab Jacking / Mudjacking
$500–$1,500 per section
Wall Anchors & Carbon Fiber Straps
$400–$1,200 per anchor
Crack Injection (Epoxy / Polyurethane)
$250–$800 per crack
Drainage Correction
$1,000–$8,000
Full Foundation Replacement
$20,000–$100,000+
* Estimates are for budgeting purposes only. Always get written quotes from licensed contractors for your specific project.
Can I Fix This Myself?
For most foundation issues, the honest answer is no. Foundation repair requires specialized equipment, engineering knowledge, and in most states a licensed contractor. Attempting DIY repairs on a structural issue can mask the problem, void your homeowner's insurance, and make the eventual professional repair more expensive. The one exception: minor cosmetic crack filling with hydraulic cement or epoxy injection kits for hairline cracks that have been confirmed non-structural by a professional.
Here are some things you can do
- Clean gutters and extend downspouts away from the foundation
- Improve grading so soil slopes away from the house
- Seal hairline cracks confirmed as cosmetic by a professional
- Install a dehumidifier in a damp crawl space as a temporary measure
Leave this to a licensed pro
- Attempt to jack up or level a slab or pier yourself
- Fill structural cracks with caulk or filler and call it done
- Ignore a crack that is widening or a door that is getting worse
- Skip a structural engineer assessment before any major repair
What Does Foundation Repair Cost?
Costs vary enormously based on foundation type, severity, and repair method. Here are national average ranges.
Typical range
$3,000–$15,000
Always get at least three written quotes from licensed foundation specialists. Prices can vary by 40% or more for the same job.
Frequently Asked Questions
Verify your contractor's license
Check credentials directly with your state licensing authority before any work begins. A valid license, general liability insurance, and workers' compensation coverage are the minimum you should require from any foundation contractor.
Construction Industries Board (CIB)
Licenses plumbers, electricians, HVAC contractors, and general contractors statewide. Always verify the CIB license number and request proof of general liability insurance and a workers' compensation certificate before signing any contract.
Texas Dept. of Licensing & Regulation (TDLR)
Licenses HVAC technicians, plumbers, electricians, and many other trades statewide under Texas Occupations Code. Always verify the TDLR license number and request proof of general liability insurance and a workers' compensation certificate before signing any contract.
Find a Foundation Repair Specialist Near You
Proxihouse connects you with licensed, insured foundation repair contractors in your area — free, with no obligation.