30×40 Barndominium Shell Cost in Nashville, TN (2026)

Planning a 30×40 barndominium shell in the Nashville area

A 30×40 barndominium shell (1,200 square feet) suits a compact home on land in the growing outer counties. Cannon, Smith, Macon and Trousdale are smaller and more rural than Davidson or Williamson. Some owners finish part of the shell as living space and keep a bay for a shop. Price the shell, interior finish and site work as three separate jobs.

• The shell price covers the structure, roof, walls and doors. Interior framing, plumbing, electrical and HVAC come later and need their own bids.
• With around 54 hot days and 66 freezing nights a year at the airport, ask what insulation the shell is ready for (for example spray foam or a thermal break) before the walls are closed.

Nashville versus the Tennessee statewide estimate

For a 30×40 barndominium shell, the Nashville estimate runs about 3% above the Tennessee statewide figure (both are estimates; bids set the real price). Nashville construction and extraction wages averaged about 91% of the U.S. mean in May 2025 (BLS OEWS), and Nashville goods prices sat near 96% of the U.S. level in 2024 (BEA RPP). That Nashville area factor applies fully to crew labor and partly to materials; the Tennessee statewide page uses an internal planning allowance instead.

What the Nashville numbers say about building here

The Nashville metro area takes in 14 Middle Tennessee counties. Davidson County is the urban core, while Rutherford, Williamson, Sumner and Wilson have grown fast around it. Wilson County gained about 15 percent between 2020 and 2024 and Rutherford about 10 percent. Murfreesboro, at about 168,400 residents, is the second-largest city in the metro.

Building activity follows that growth. In 2025 Davidson County authorized about 2,740 new single-unit homes and Rutherford about 2,530. Wilson, Sumner, Maury and Williamson each authorized more than 1,250.

Middle Tennessee is also livestock and hay country. The 2022 Census of Agriculture counted more than 1,000 farms in each of Rutherford, Williamson, Sumner, Wilson, Maury, Robertson and Dickson counties. Robertson ranked fifth in Tennessee for cattle and calves, Williamson fourth for horse and pony sales, and Wilson seventh.

Lebanon grew fastest among the larger cities, about 34 percent from April 2020 to July 2024, followed by Gallatin at about 18 percent and Columbia and Spring Hill at about 17 percent each. Nashville-Davidson grew about 2 percent and Brentwood was nearly flat.

Farm tracts in the outer counties run larger: Hickman County farms averaged about 216 acres in 2022 and Robertson about 179, and Robertson reported about 141,800 acres of cropland. Maury and Wilson each had about 1,440 farms. Nashville International Airport averages about 66 nights a year at or below 32°F and about 4.7 inches of snow, and rain is spread evenly, with every month averaging between about 3.4 and 5.0 inches.

Local building offices

Contact the office for your address to confirm what applies to your project.

• Metro Nashville Codes and Building Safety (Nashville-Davidson County)
• Rutherford County Building Codes (unincorporated Rutherford County)

Statewide reference: Tennessee State Fire Marshal's Office: residential permit jurisdictions

Site references to look up for your Nashville address

The Nashville-Davidson--Murfreesboro--Franklin, TN metro area (Census CBSA 34980) covers a lot of ground, so look up the exact parcel rather than the city.

• ASCE Hazard Tool: wind, snow and other site loads for the Nashville-area parcel
• USDA NRCS Web Soil Survey: the soil map units under your Nashville site, including shrink-swell ratings
• FEMA Flood Map Service Center: the flood zone for your Nashville address
• NOAA Storm Prediction Center: severe-weather background for Middle Tennessee

General planning reference from ASCE, USDA NRCS, FEMA and NOAA, retrieved October 25, 2026. Not a design value. Your engineer, builder and local authority set actual requirements.

Nashville climate at a glance

Nashville International Airport (NOAA station USW00013897) averages 60.8°F over the year, with about 50.51 inches of precipitation, about 4.7 inches of snow, about 54 days at 90°F or hotter and about 66 nights at 32°F or colder.

General planning reference from NOAA NCEI U.S. Climate Normals 1991–2020, retrieved October 25, 2026. Not a design value. Your engineer, builder and local authority set actual requirements. NOAA NCEI U.S. Climate Normals (1991–2020)

Nashville month by month

Nashville wettest: May (5 in). Nashville driest: Oct (3.4 in). Jun, Jul and Aug: 10+ days at 90°F each. Jan, Feb, Mar, Nov and Dec: 5+ freezing nights each. Jun–Sep deliver 16.1 of Nashville's 50.5 inches (32%). Nashville lows bottom out near 30.1°F in Jan; highs peak near 90.9°F in Jul. Roughly 14 Nashville days a year bring 1 inch or more. For snow load, check your parcel in the ASCE Hazard Tool.

NOAA normals, USW00013897, Nashville International Airport.

Counties, cities and towns in the Nashville metro area

The Nashville-Davidson--Murfreesboro--Franklin, TN metro area had about 2,150,553 residents in July 2024, across 14 counties. The price on this page is one figure for the whole metro area, so use the calculator if your site is far from the core.

Nashville places (55 incorporated, July 2024 residents within these counties): Nashville-Davidson 704,963 (+2.2%); Murfreesboro 168,387 (+10.2%); Franklin 89,142 (+6.7%); Hendersonville 63,947 (+3.5%); Smyrna 60,302 (+13.6%); Spring Hill 59,398 (+17.2%); Gallatin 52,489 (+18.1%); Lebanon 51,501 (+33.8%); Columbia 48,812 (+17.3%); Brentwood 45,525 (+0.3%); Mount Juliet 44,066 (+12.1%); La Vergne 41,430 (+7%); 43 more.

Nashville counties authorized 13,267 single-unit homes in 2025, led by Davidson County (2,739) and Rutherford County (2,533). Wilson County grew fastest from April 2020 to July 2024 (+15%); the lowest was Davidson County (+1.9%). Among Nashville towns of 1,000+ people, Lebanon grew fastest (38,486 to 51,501, +33.8%). The 2022 farm census counted 12,589 farms in Nashville's 14 counties; 5,979 of them (47%) had under 50 acres, and Wilson County had the most (1,443, averaging 125 acres). By use, Nashville farmland broke down as 741,378 acres of cropland, 483,254 of pasture and 401,259 of woodland, so cropland led.

Census city and town estimates; Census Building Permits Survey; USDA NASS county profiles; Census county estimates. Retrieved October 26, 2026.

Material suppliers near Nashville

Listed for reference, not an endorsement.

• Metal Formers: metal roofing and building panels (Mt. Juliet, per its website)
• Metal Roofing Systems – Nashville branch: metal roofing and building panels
• Nashville Ready Mix: ready-mix concrete

Office and supplier links checked October 25, 2026.