Northwest Crawl Space Services Crawl Space Repair Google Rating and Reviews (4.9, 38)

Crawl Space Services

• Crawl space encapsulation & vapor barrier installation
• Crawl space & attic insulation repair and installation
• Crawl space and attic cleaning, mold remediation, and moisture control
• Rodent prevention and exclusion; air duct repair, sealing & replacement

Northwest Crawl Space Services Description

Northwest Crawl Space Services is a family-owned contractor based in Kent, Washington, specializing in residential crawl space, attic, and rodent-prevention services across the Pacific Northwest.

The company focuses on improving home health, energy efficiency, and structural durability by addressing moisture, insulation, air leakage, and pest entry points.

Core crawl space offerings include cleaning, encapsulation with vapor barriers, insulation repair and installation, drainage solutions including sump pumps, and air duct repair, sealing, and replacement.

Northwest Crawl Space also provides attic services—attic cleaning, blown and batt insulation installation and repair, ventilation improvements, and mold remediation—to enhance thermal performance and indoor air quality.

For homes threatened by rodent intrusion, the firm offers comprehensive rodent prevention programs, including slab installations, exclusion work, and ongoing protection plans designed to keep pests out of living spaces.

The company emphasizes certified, professional workmanship and participates in utility rebate programs (PSE-recommended energy professional) and offers customer financing options to make upgrades more accessible.

Northwest Crawl Space highlights recent project case studies demonstrating crawl space restorations, encapsulation installations with dehumidifiers and sump systems, duct repairs, and attic insulation replacements.

With a contractor license (#NORTHCS812R0) and multiple local partnerships, the firm serves communities including Bellingham, Seattle, Bellevue, Tacoma, and Olympia.

Customer-facing services include free inspections, project estimates, and a focus on long-term solutions that reduce energy bills, prevent mold and structural decay, and improve overall home comfort and safety.

Contact and service scheduling information is available via their website.

Crawl Space Repair Service Locations

• Bellevue WA
• Medina WA
• Kirkland WA
• Seattle WA
• Redmond WA
• Kingston WA
• Vashon WA
• Arlington WA
• Port Ludlow WA
• Pacific WA

Review 1
Received a quote for services that wasn’t comparable to another contractor. Asked for them to provide a comparative quote after providing them documentation of the line items costed out by the other contractor. We ended up using the other subcontractor for some of the work and revisited the remaining line items with Northwest Crawl Space Services to requote. They raised the prices of the remaining line items from their previous quote to match their minimum job cost of $4,000. Keep that in mind, that their minimum cost likely for any job is $4,000 for them to show up and they are likely unwilling to negotiate on pricing below that number.

Edit: Spoke to the owner after the initial review was posted. Very professional response and we were able to work out a compromise that retained the work with them. Issue was primarily a miscommunication but was resolved after conversations with the owner. Work was great though. Very fast and exactly what they quoted!

Review 2
We live over a natural spring that constantly
Floods our crawlspace. I had about 10 bids and NW Crawl was the most comprehensive quote showing detail in the work they would perform. Matan made it easy to understand and was helpful in adding or removing recommended items to the job. He showed me that my floor ducts were leaking and should be insulated, we agreed and since they fixed those our heat usage went way down and we are getting quality heat. The video attached is the finished crawl space with brand new sump pump system and vapor barrier. That clear water glass pictured was from the inside of the sump basin showing how filtered the water was in our previously dirty and gross crawlspace.

These guys were great when they installed the system. The job took 8 hours and they were polite and left the house clean. Highly recommend working with these guys.

Typical Costs
Crawl Space Cleaning: $500 ~ $4,000
This is for basic services like removing debris, old insulation, or minor mold.

Foundation and Structural Repairs: $2,500 ~ $8,000
This includes fixing things like a damaged support beam or re-leveling the foundation.

Waterproofing and Moisture Control: $1,500 ~ $5,000
This might involve installing a drainage system or a sump pump.

Crawl Space Encapsulation: $5,000 ~ $15,000+
This is a comprehensive solution that includes a vapor barrier, insulation, and often a dehumidifier. The cost can be on the higher end due to the materials and labor involved.