Questions Nashville Homeowners Ask About Their Crawl Spaces

It earns its cost where the space is damp for much of the year: sweating ducts, a musty smell, wet insulation, mildew on joists. This Old House's 2026 guide puts the job at $1,500–$15,000, about $5,500 on average. If the crawl space is dry and the plastic is intact, a repair to the plastic may be enough for now.

A handy owner who can stand tight spaces can lay and tape plastic. The harder parts are drainage, sealing the liner to walls and piers, and the drying equipment, which needs a drain and an outlet. Mistakes trap water under the plastic, so many owners at least pay for an inspection first.

Usually it means a heavier ground liner with sealed seams, but with the walls left bare or the vents left open. It costs less than a full job and stops much of the vapor from the soil. In a humid summer it does less against outdoor air getting in.

It can change them, up or down, because it changes how air moves between the ground and the house. Metro Public Health says about 40 percent of the 4,152 homes tested in Davidson County showed elevated levels. Test before and after the work.

In Davidson County, the Board for Licensing Contractors requires a Home Improvement license for residential remodeling projects from $3,000 to $24,999, and a contractor's license from $25,000 up. Ask for the number and check it on verify.tn.gov.

Not usually. Homeowner policies tend to cover sudden events, a pipe that bursts, for example, rather than years of damp. If a covered event flooded the crawl space, some of the cleanup might qualify. Talk to the insurer before anyone starts, and photograph everything.

It depends on the company. Many local specialists don't charge for the first visit; ask when they call, before they come out.

One independent crawl space specialist who works around Nashville. This website does no work under houses; it hands your request to that specialist, who rings you and, if it makes sense, sets up a visit.