Crawl Space Cleanup, Vapor Barriers & Repair in King & Snohomish County

Most crawl space projects in King County run between $2,000 and $12,000. The price depends on square footage, type of contamination, whether you need a vapor barrier, and whether insulation replacement is part of the scope. We provide a free on-site estimate with a clear, line-item breakdown before any work begins.

A typical crawl space cleanup takes one to three days. Larger projects that include insulation removal, full sanitation, vapor barrier installation, and drainage work may take up to a week. We give you a timeline during the estimate so you know what to expect.

In the Pacific Northwest, almost every crawl space benefits from a vapor barrier. Ground moisture in this region is high enough that bare dirt or old plastic sheeting usually leads to elevated humidity, mold growth, and wood rot over time. We will tell you honestly whether your current barrier is working or whether it needs replacement.

Crawl space encapsulation means sealing the space with a heavy-duty vapor barrier on the floor and walls, insulating the perimeter walls, and sometimes adding a dehumidifier or sump pump. It is the most thorough approach to moisture control. Not every home needs full encapsulation. We will let you know if a simpler solution will handle the job.

Yes, in most cases. Musty odors in the living space almost always trace back to moisture or mold in the crawl space. Air moves upward through the floor and carries those smells with it. Removing contaminated insulation, treating mold, and installing proper moisture controls usually eliminates the problem.

We do. Rodent contamination is one of the most common reasons homeowners call us for crawl space work. We remove damaged insulation, sanitize affected areas, seal entry points, and install new insulation. If you need a sump pump or vapor barrier at the same time, we handle everything in one project.

Common signs include musty odors in your home, visible condensation on floor joists or ductwork, sagging or soft floors, high indoor humidity readings, and mold growth on wood surfaces. If you see standing water after rain, that is an obvious sign. We offer free inspections so you can get a clear answer without guessing.

Most crawl space cleanup, vapor barrier, and insulation work does not require a permit. Structural repairs, plumbing modifications, or electrical work may require permits depending on the scope. We handle the permitting process when it applies and will let you know upfront if your project needs one.

We do not recommend using crawl spaces for general storage. Even with a vapor barrier and proper moisture control, crawl spaces are not designed as living or storage areas. Storing items down there can block airflow, trap moisture, and make future inspections difficult. If you need storage solutions, a garage or shed is a better option.

We recommend a visual inspection every one to two years, or immediately after heavy storms, plumbing leaks, or pest activity. Catching problems early keeps repair costs low. If your home is older than 30 years or sits in a low-lying area, annual inspections are a good idea.

We can discuss payment options during your estimate. For larger projects, we work with homeowners to find a solution that fits their budget. Contact us to learn about current options.

We serve homeowners throughout King County and Snohomish County, including Kent, Auburn, Renton, Covington, Federal Way, Tukwila, SeaTac, Mountlake Terrace, Edmonds, Lynnwood, Shoreline, Bothell, Kirkland, and Woodinville. If you are in the greater Puget Sound area, there is a good chance we cover your neighborhood.