How much does crawl space repair cost?

Crawl space repair costs $1,500 to $15,000, and the figure depends entirely on what failed. Replacing insulation runs $1,000 to $4,000, sistering damaged floor joists $1,000 to $10,000, installing an interior drain and sump pump $3,000 to $8,000, and replacing a main beam $2,500 to $12,000.

How much does it cost to fix sagging floors from a crawl space?

Fixing sagging floors from below costs $1,000 to $10,000. Adjustable support jacks run $150 to $500 each installed and often solve mild sag. Sagging caused by rotted joists or a failed girder means sistering or beam replacement, which puts the job in the $4,000 to $12,000 range.

How much does it cost to fix a wet crawl space?

Fixing a wet crawl space costs $2,500 to $12,000, with most homeowners paying $5,000 to $8,000. Damp air alone is solved by a vapor barrier and dehumidifier at $1,800 to $6,500. Standing water needs interior drainage with a sump pump at $3,000 to $8,000, and fixing gutters and grading first — $600 to $4,000 — sometimes makes the drain unnecessary.

How much does crawl space foundation repair cost?

Crawl space foundation repair costs $1,500 to $10,000 for most homes. Leveling a pier-and-beam house with new supports runs $1,500 to $10,000, at $300 to $1,200 per support. Sealing a foundation wall crack is $350 to $1,200 per crack. Settlement that needs push or helical piers costs $8,000 to $30,000.

Is crawl space repair covered by homeowners insurance?

Sudden, accidental damage is usually covered — a burst pipe that soaked the crawl space, for example. Damage from long-term humidity, groundwater seepage, poor drainage or deferred maintenance is almost always excluded as wear and tear. Flood damage needs separate flood insurance.

How do I know whether the crawl space or something else is the problem?

Cupped or sloping floors, doors that stop latching, a musty smell on the first floor and visible condensation on ductwork all point downward. A crawl space inspection costs $100 to $500 and identifies which of the four repair categories you are actually in, which is worth paying for before collecting quotes.

Crawl Space Repair Cost (2026)

"Crawl space repair" is not one job. It covers structural work on joists and supports, water management, insulation replacement and mold removal — and the four have completely different prices. Most homeowners end up between $2,000 and $10,000, with $6,000 a fair midpoint for a house with more than one problem.

Typical$6,000typical repair scope

Most homeowners pay$2,000–$10,000national range, materials and labour

Updated October 25, 2026 · National 2026 figures · Independent of any contractor

How much does crawl space repair cost?: Crawl space repair costs $1,500 to $15,000, and the figure depends entirely on what failed. Replacing insulation runs $1,000 to $4,000, sistering damaged floor joists $1,000 to $10,000, installing an interior drain and sump pump $3,000 to $8,000, and replacing a main beam $2,500 to $12,000.
How much does it cost to fix sagging floors from a crawl space?: Fixing sagging floors from below costs $1,000 to $10,000. Adjustable support jacks run $150 to $500 each installed and often solve mild sag. Sagging caused by rotted joists or a failed girder means sistering or beam replacement, which puts the job in the $4,000 to $12,000 range.
How much does it cost to fix a wet crawl space?: Fixing a wet crawl space costs $2,500 to $12,000, with most homeowners paying $5,000 to $8,000. Damp air alone is solved by a vapor barrier and dehumidifier at $1,800 to $6,500. Standing water needs interior drainage with a sump pump at $3,000 to $8,000, and fixing gutters and grading first — $600 to $4,000 — sometimes makes the drain unnecessary.
How much does crawl space foundation repair cost?: Crawl space foundation repair costs $1,500 to $10,000 for most homes. Leveling a pier-and-beam house with new supports runs $1,500 to $10,000, at $300 to $1,200 per support. Sealing a foundation wall crack is $350 to $1,200 per crack. Settlement that needs push or helical piers costs $8,000 to $30,000.
Is crawl space repair covered by homeowners insurance?: Sudden, accidental damage is usually covered — a burst pipe that soaked the crawl space, for example. Damage from long-term humidity, groundwater seepage, poor drainage or deferred maintenance is almost always excluded as wear and tear. Flood damage needs separate flood insurance.
How do I know whether the crawl space or something else is the problem?: Cupped or sloping floors, doors that stop latching, a musty smell on the first floor and visible condensation on ductwork all point downward. A crawl space inspection costs $100 to $500 and identifies which of the four repair categories you are actually in, which is worth paying for before collecting quotes.

Crawl space repair cost by problem
What you're pricing	Low	Typical	High
Replace crawl space insulationRemove fallen batts, install new; 1,500 sq ft	$1,000	$2,200	$4,000
Sistering damaged floor joists$100–$400 per joist plus access labour	$1,000	$4,000	$10,000
Support jacks / adjustable columns$150–$500 each installed, usually several	$800	$2,000	$5,000
Beam replacementMain girder, includes temporary shoring	$2,500	$5,500	$12,000
Interior French drain + sump pumpPerimeter trench, gravel, pump and discharge	$3,000	$4,800	$8,000
Mold remediation in a crawl spaceScope depends on affected square footage	$1,500	$3,500	$6,000
Subfloor replacementPer affected area, from below	$1,200	$3,000	$7,000

Figures are per repair, national averages, materials and labour included unless noted.

What drives the price

Which system failed: Insulation is the cheapest thing to fix and the most common to quote. Structural work — joists, beams, supports — is several times the price and the only category where delay makes the number grow.
How many joists: Sistering is priced per joist, $100 to $400 each installed. Two joists is a $700 job. Fifteen is a $5,000 one. Ask for the count on the quote, not just the total.
Whether water is still coming in: Repairing rot without fixing drainage means paying twice. A contractor who quotes structural work and says nothing about where the water came from has quoted half a job.
Access: Everything in a crawl space is done lying down. Low headroom, tight hatches and obstructed runs add labour to every line item, typically 10 to 20%.

Read the quote as four separate jobs

Almost every crawl space repair quote mixes structural work, water management, insulation and remediation into a single number. Ask for it split. The split tells you which parts are urgent — structural and water — and which are comfort and efficiency, which can wait a season if the budget is tight.

It also tells you whether the contractor has diagnosed anything. A quote that lists "crawl space repair — $9,400" is a sales document. A quote that lists eleven sistered joists, four support jacks, 140 linear feet of drain and a 60-pint dehumidifier is an estimate.

What is urgent and what is not

Urgent: standing water, active rot in joists or a girder, a failing support. These get worse and the cost of waiting is compounding — a joist that needs sistering this year may need replacing next year, at three times the price.

Not urgent: fallen insulation, an old thin vapor barrier, general mustiness without measurable damage. These are worth fixing, and worth fixing as one project alongside encapsulation, but a month of delay costs nothing.

Wet crawl space repair cost

A wet crawl space is the most common reason anyone searches for crawl space repair, and the price depends on which kind of wet it is. Humid air and condensation on ducts mean ground moisture and outside air: a sealed vapor barrier at $600 to $3,000 and a dehumidifier at $1,200 to $3,500 solve it. Puddles after rain mean surface water finding its way in, and gutters, downspout extensions and regrading at $600 to $4,000 often fix it outright.

Water that stands for days, or returns with every storm, is groundwater. That needs an interior perimeter drain with a sump pump, $3,000 to $8,000, and then encapsulation over it. Put together, most wet crawl spaces end up between $5,000 and $8,000 once the water is managed and the space is sealed — plus any joist or insulation damage the water has already done.

Fix the water before anything else. Pumping out a flooded crawl space costs $500 to $2,500 each time, and repairing rot in a space that is still wet means paying for the same repair again.

Crawl space foundation repair

In a crawl space home the foundation is a perimeter wall plus interior piers carrying the beams. Most "crawl space foundation repair" is the interior part: piers that have sunk or cracked, shims that have rotted, and beams that need new support. Leveling a pier-and-beam house with new footings and steel jacks runs $1,500 to $10,000, priced at $300 to $1,200 per support.

The perimeter wall is a different price list. Cracks are sealed at $350 to $1,200 each, while a wall that is settling needs push or helical piers at $1,500 to $3,000 per pier — typically $8,000 to $30,000 for the job. That is the point to pay $400 to $1,500 for a structural engineer before accepting any quote.

Repair first, then seal

The correct order is diagnose, dry, repair, then encapsulate. Sealing a crawl space that still has an active water source or rotten framing traps the problem behind a liner where nobody will look at it for ten years.

Contractors who lead with encapsulation on a house with structural symptoms are selling the product they have, not the job the house needs. It costs $100 to $500 to get an independent inspection first, and on a $10,000 decision that is cheap.

Common questions

How much does crawl space repair cost?: Crawl space repair costs $1,500 to $15,000, and the figure depends entirely on what failed. Replacing insulation runs $1,000 to $4,000, sistering damaged floor joists $1,000 to $10,000, installing an interior drain and sump pump $3,000 to $8,000, and replacing a main beam $2,500 to $12,000.
How much does it cost to fix sagging floors from a crawl space?: Fixing sagging floors from below costs $1,000 to $10,000. Adjustable support jacks run $150 to $500 each installed and often solve mild sag. Sagging caused by rotted joists or a failed girder means sistering or beam replacement, which puts the job in the $4,000 to $12,000 range.
How much does it cost to fix a wet crawl space?: Fixing a wet crawl space costs $2,500 to $12,000, with most homeowners paying $5,000 to $8,000. Damp air alone is solved by a vapor barrier and dehumidifier at $1,800 to $6,500. Standing water needs interior drainage with a sump pump at $3,000 to $8,000, and fixing gutters and grading first — $600 to $4,000 — sometimes makes the drain unnecessary.
How much does crawl space foundation repair cost?: Crawl space foundation repair costs $1,500 to $10,000 for most homes. Leveling a pier-and-beam house with new supports runs $1,500 to $10,000, at $300 to $1,200 per support. Sealing a foundation wall crack is $350 to $1,200 per crack. Settlement that needs push or helical piers costs $8,000 to $30,000.
Is crawl space repair covered by homeowners insurance?: Sudden, accidental damage is usually covered — a burst pipe that soaked the crawl space, for example. Damage from long-term humidity, groundwater seepage, poor drainage or deferred maintenance is almost always excluded as wear and tear. Flood damage needs separate flood insurance.
How do I know whether the crawl space or something else is the problem?: Cupped or sloping floors, doors that stop latching, a musty smell on the first floor and visible condensation on ductwork all point downward. A crawl space inspection costs $100 to $500 and identifies which of the four repair categories you are actually in, which is worth paying for before collecting quotes.

How we price this. Figures are national 2026 estimates built from contractor quote ranges, material pricing and regional labour rates, then cross-checked against published industry cost data. Reckon Home does not sell, broker or perform this work. Use these numbers to judge whether a quote is reasonable — not as a quote.