Crawl space costs
Encapsulation, moisture control, structural repair, cleanouts and inspections — priced by the job, as national ranges, by someone who doesn't sell the work.
Cost calculator
$1,500–$15,000your space, your regionArea, scope, condition and region in, a line-by-line price range out.
Crawl Space Encapsulation Cost
$3,000–$8,000typical 1,500 sq ft crawl spaceSealing a crawl space against ground moisture — what the liner, the vents and the dehumidifier each add.
Crawl Space Repair Cost
$2,000–$10,000typical repair scopeFour different jobs sold under one name. Structural, water, insulation and mold, priced apart.
Crawl Space Cleaning Cost
$500–$4,000typical cleanoutDebris, old insulation and contamination — and why cleaning is a stage rather than a solution.
Crawl Space Inspection Cost
$150–$500independent inspectionWhat an independent inspection buys you that a contractor’s free visit doesn’t.
Floor Joist Repair Cost
$1,500–$7,000typical job, 8–12 joistsPriced per joist, which makes it one of the few home repairs you can check line by line.
Crawl Space Vapor Barrier Cost
$600–$3,000typical crawl spaceSheeting on the ground, not a sealed envelope — and the four-fold price difference between them.
Crawl Space Dehumidifier Cost
$800–$3,500unit and installationThe component that decides whether an encapsulation actually holds humidity down.
Crawl Space Moisture Control Cost
$300–$12,000depending on the sourceFour possible sources, four different fixes, from $400 to $12,000. Diagnosis first.
Standing Water in a Crawl Space
$500–$12,000removal plus a permanent fixGetting the water out is the small number. Stopping it returning is the real one.
What the whole project costs
Almost nobody buys one crawl space service. The common sequence is an inspection at $150 to $500, a cleanout at $500 to $4,000, whatever repair the inspection found at $1,500 to $15,000, and encapsulation at $3,000 to $8,000. Bought together as one project, a realistic total for a house with a genuine moisture problem is $8,000 to $15,000.
Bought separately over several years, the same work costs materially more — every visit pays mobilisation and access costs again, and the scope grows while it waits. That is the strongest financial argument for dealing with a wet crawl space in one pass rather than in instalments.
Where the money actually goes
Labour, mostly. Crawl space work is performed lying down in a space under four feet high, and the physical difficulty of the environment is the dominant cost in every line item. This is why headroom and hatch access change quotes by 10 to 20%, and why the same square footage costs more under a 1920s house than under a 1990s one.
Materials are the smaller half. A 20 mil reinforced liner for a 1,500 square foot crawl space is roughly $900 to $1,500 in material. A commercial-grade crawl space dehumidifier is $900 to $2,000 for the unit. The rest of a $5,500 encapsulation quote is people, time and access.
Common questions
- What does crawl space work cost in total?
- A full crawl space project — cleanout, any repair, drainage where needed and encapsulation — typically lands between $4,000 and $15,000. Encapsulation alone averages $5,500. A vapor barrier on its own starts around $600.
- What order should crawl space work happen in?
- Diagnose, dry, repair, then seal. An inspection identifies the water source and the condition of the framing. Water is removed and drainage installed. Damaged joists and supports are repaired. Encapsulation goes in last, over a space that is already dry and sound.
- Do I need to encapsulate, or is a vapor barrier enough?
- A vapor barrier is enough where the crawl space is already dry and the only issue is ground moisture evaporating upward. Encapsulation is the answer where humidity is measurably high, there is condensation on ducts or framing, or the floor above shows cupping — a barrier does not control humid outside air coming through open vents.
- Are crawl space vents supposed to be open or closed?
- Closed, in most of the United States. Venting a crawl space was standard practice for decades, and in humid climates it makes the problem worse: warm outside air enters, meets cooler surfaces, and condenses. Modern building science, and most current codes, favour a sealed and conditioned crawl space.
National 2026 figures, published as ranges. Reckon Home does not sell, broker or perform this work.