Crawl Space Repair in Alton, Illinois

Find trusted local contractors for crawl space encapsulation, waterproofing, mold removal, and more in Alton. 15 local companies found.

Local Price Estimates — Alton

Encapsulation$3,000$7,950
Repair$1,500$5,650
Waterproofing$1,450$5,000
Mold Removal$500$3,850
Inspection$150$400

* Estimates based on local market rates. Get free quotes for exact pricing.

Crawl Space Contractors in Alton

Crackstoppers Foundation Repair & Waterproofing

62 Spring Trail Ct, St Charles, MO 63303, USA

5.0

27 reviews

WaterproofingFoundation Repair

Missouri Basement

100 Hawning Rd Unit C, St Charles, MO 63301, USA

5.0

320 reviews

Drainage

Air Sense Environmental- Radon Mitigation & Testing

5237 Old Alton Edwardsville Rd, Edwardsville, IL 62025, USA

5.0

132 reviews

Crawl Space Repair

Mid States Spray Foam

4555 N Alby Rd, Godfrey, IL 62035, USA

5.0

11 reviews

Crawl Space Repair

Acculevel

200 Yachtview Dr, West Alton, MO 63386, USA

5.0

7 reviews

Crawl Space Repair

RCC Restoration

2900 Maryville Rd, Maryville, IL 62062, USA

5.0

81 reviews

Crawl Space Repair

Acculevel

101 W Vandalia St Suite 116, Edwardsville, IL 62025, USA

5.0

8 reviews

Crawl Space Repair

Leading Edge

13077 Pittsburg Rd, Marion, IL 62959, USA

4.9

85 reviews

Crawl Space Repair

Helitech Waterproofing & Foundation Repair

8251 Bunkum Rd, Caseyville, IL 62232, USA

4.9

2312 reviews

WaterproofingFoundation Repair

Foundation Recovery Systems

1625 Larkin Williams Rd, Fenton, MO 63026, USA

4.9

1672 reviews

Foundation Repair

Crawlspace Medic of St. Louis

8204 Exchange Way, St. Louis, MO 63144, USA

4.8

128 reviews

Crawl Space Repair

Woods Basement Systems, Inc.

524 Vandalia St, Collinsville, IL 62234, USA

4.7

2502 reviews

Drainage

PuroClean Emergency Restoration Services

1934 N 81st St, Caseyville, IL 62232, USA

4.6

149 reviews

Crawl Space Repair

Midwest Basement Tech

104 Ransom St, Brighton, IL 62012, USA

4.4

25 reviews

Drainage

Woodson

418 Vine St, Bethalto, IL 62010, USA

3.7

6 reviews

Crawl Space Repair

FAQs — Crawl Space Services in Alton

How much does crawl space repair cost in Alton?

Crawl space repair in Alton, Illinois typically costs between $1,500 and $5,650, depending on the extent of damage and services required.

How much does crawl space encapsulation cost in Alton?

Crawl space encapsulation in Alton typically costs between $3,000 and $7,950. The price depends on the size of your crawl space and the materials used.

What crawl space services are available in Alton?

Local contractors in Alton offer encapsulation, repair, waterproofing, mold removal, insulation, cleaning, and inspection services. Use our directory to find and compare local professionals.

Crawl Space Concerns in Illinois

The Midwest combines multiple crawl space risks: radon gas seeping through soil, clay soils that move seasonally, and extreme weather events. A properly encapsulated crawl space with radon mitigation addresses the most serious health and structural risks in this region.

!Radon levels in Midwest crawl spaces are among the highest nationally — testing is essential
!Heavy clay soils expand when wet and contract when dry, stressing foundations
!Flash flooding and storm water overwhelm drainage systems regularly
!Temperature swings from -10°F to 100°F stress crawl space materials year-round
!Tornado and severe storm damage to foundations is more common in this region

Local Tip — Illinois

Radon is the #2 cause of lung cancer in the US, and Midwest homes are in a high-radon zone. If you are encapsulating your crawl space, add a radon mitigation system at the same time — bundling saves $500–$1,000 vs. separate installations.

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Pro Tip

Prices vary by location, crawl space size, and severity. Always get 2–3 quotes before hiring.