Foundation Repair Nashville: $2,225 to $8,133 + Permits

We found no Nashville price from a publisher we use. Every row is a national figure and is labeled that way; each publisher's range is shown on its own and none are merged. The company that answers quotes its own inspection fee before anything is booked.

Do this now, before you call a Nashville foundation company

1. Measure and photograph the crack with a date. HomeGuide treats cracks under 1/8 inch as often cosmetic and flags cracks wider than 1/8 inch; put a pencil mark at each end so you can see whether it grows. The ASCE Texas Section guideline says the majority of cracks do not compromise structural integrity, so the record matters more than the first look.
2. Walk the outside after a rain. The ASCE Texas Section guideline calls for grading that falls at least 5 percent for the first 5 feet from the wall and downspouts that discharge well away from it. Pooling water, a short downspout or a flat bed against the house explains a lot of movement.
3. Note doors, floors and the crack pattern. Doors that stick, gaps over cabinets and a floor you can feel slope are the signs HomeGuide lists; the guideline says a floor slope over 1 percent is usually noticeable. Diagonal cracks at corners that are wider at one end are the settlement pattern engineers look for (Forcon).
4. Check the price band before you check the license. In Davidson County a foundation job priced $3,000 to $24,999 requires a Tennessee home improvement license and a job of $25,000 and up requires a contractor's license. Ask for the number and look it up on the state's verify-a-license site before the first visit; the band tells you which license to expect.
5. Decide who inspects first. A foundation repair company's visit is often free; a structural engineer's report costs $300 to $1,000 (Angi) and comes with no repair to sell. HomeGuide warns that companies offering free inspections "may be more likely to recommend repairs to get your business." Foundation inspection cost explains the difference.
6. If there is standing water, keep clear of outlets and equipment. Do not touch electrical equipment if it is wet or you are standing in water (Red Cross). A gas smell with any of this: leave, then call 911 or the gas utility from outside.

Is it urgent? Foundation signs in Nashville that should not wait

Most foundation movement in Nashville is measured in months, and the ASCE Texas Section guideline says the majority of cracks do not compromise structural integrity. Three things are worth a prompt call rather than a wait-and-see, and none of them is a verdict on your house: a wall that is visibly leaning or has shifted since you last looked; a new horizontal crack at mid-height with the wall bowing inward, which Forcon's engineering guide calls "a cause for immediate concern" because it comes from soil pressure; and plumbing that has stopped draining under a slab, which can mean a broken line washing out the soil beneath it. One addition for the Nashville Basin: a new depression in the yard, a drain that suddenly runs to nowhere, or a crack that opened in days rather than months over ground the USDA describes as "deeply pitted by limestone sinks" is worth a call this week, with photos of the ground as well as the wall.

Everything else, a hairline crack, a door that started sticking this summer, a slope you noticed with a marble, is a measured problem. Photograph it, mark it and book an inspection within a few weeks. HomeGuide prices a single crack injection at $250 to $800 nationally; settling that calls for piers runs $4,500 to $20,000, and the first visit is usually an inspection with a written plan, not a repair.

Limestone, sinkholes and 1987 houses

Nashville is the center of the USDA's Nashville Basin land resource area (MLRA 123), and the NRCS description of it is blunt: "In many areas the land surface is deeply pitted by limestone sinks, and outcrops of limestone are almost everywhere," and "sinkholes are common in the limestone." Surface soils are silt loam, silty clay and silty clay loam over that rock, and average annual precipitation runs 48 to 57 inches, well above the Blackland Prairie's 40. That combination produces a different foundation problem from Texas clay. Rock close to the surface means footings can sit on uneven bearing, with one end on limestone and the other on soil that compresses; water moving through the rock can carry fines away from under a footing; and a wet crawl space over silty clay rots sills and joists.

A foundation contractor or engineer would check which of those is in play: measure floor elevations to find the low corner, probe the crawl space for standing water and soft wood, look at the yard for depressions and at the downspouts for where 50 inches of rain goes, and ask about any grading or sinkhole repair on the lot. HomeGuide prices crawl space foundation repair at $2,500 to $8,000 nationally and sistering a floor joist at $150 to $325 each. The Census median Nashville-Davidson home was built in 1987, so a large share of the stock is 1970s and 1980s crawl space construction with original sills. Crawl space encapsulation in Nashville covers the moisture side.

Metro Nashville permits: piers and structural elements

Metro Codes publishes a list of projects that may or may not require a permit (issued 1989, revised April 2011). On it, "PIERS" require a permit for one- and two-family dwellings and for all other buildings, and so does "carpentry replacing any structural element, joist, rafter, stud, etc." New foundations of 400 square feet or smaller are exempt for one- and two-family houses, larger ones are not. A property owner who occupies or intends to occupy the single-family house may pull the permit, or a licensed contractor may; the Codes brochure warns that an owner who pulls the permit "becomes totally responsible for code compliance," including subcontractor work. Permit Division 615-862-6517, Building and Construction Division 615-862-6550. Angi's national permit figure is $75 to $150.

Tennessee licensing: $3,000 and $25,000

Tennessee licenses by price band, and Davidson County is one of nine counties that adopted the state's Home Improvement law, with Shelby, Knox, Hamilton, Rutherford, Robertson, Bradley, Haywood and Marion. A home improvement license applies "when the cost is $3,000 to $24,999," and "$25,000 and up require a 'Contractor's' license" from the Tennessee Board for Licensing Contractors. A pier job that crosses $25,000 is a contractor's-license job; most crack injections and single-corner repairs fall in the home improvement band. Verify either one at the state's license search. A structural engineer's report is $300 to $1,000 nationally (Angi), and on limestone ground that report is what distinguishes a settled footing from a crawl space moisture problem.

Local soil, permit and licensing facts for Nashville, from official city, state, USDA and Census pages unless marked.

More Nashville repair guides

Water under the house: a Nashville plumber, drain cleaning in Nashville and water damage restoration in Nashville. Roof runoff and gutters: roof repair in Nashville. Damp crawl space air: HVAC repair in Nashville. All trades: home repair in Nashville. Compare foundation repair in Atlanta and foundation repair in Charlotte. All foundation guides: foundation repair, foundation repair cost, basement crack repair, foundation underpinning, French drain cost. Calls go to an independent foundation repair company that serves your area and takes this kind of job; hours vary (how calls work).