Home projects in Nolensville

Nolensville has grown from a small crossroads village into a busy suburb, so most of its homes are recent subdivision builds, with a scattering of older farmhouses and the historic buildings along Nolensville Pike. Because the housing is new, many projects here are about finishing, extending or protecting a house rather than fixing an old one. The town's building code amendments are unusually specific, and a few of them matter to homeowners.

Nolensville's code: 2024 editions since July 1, 2025

The town's Ordinance 25-07 adopted the 2024 editions of the International codes, including the International Residential Code, Building, Plumbing, Mechanical, Fuel Gas, Energy, Existing Building and Property Maintenance codes. The ordinance took effect on July 1, 2025.

Nolensville's local amendments to the residential code include several that change how projects are built or permitted.

Roof replacement without a permit

The town added "roof covering replacement that does not involve the replacement of structural components" to the list of work exempt from a permit. In practice, a straightforward shingle tear-off and re-roof doesn't need a Nolensville building permit. If rotted decking, rafters or trusses have to be replaced, it's no longer just a covering, so talk to the codes department.

That's the opposite of Metro Nashville, where re-roofs need a permit. A roofer who works both sides of the county line should know the difference. Even without a permit, ask for the manufacturer's installation requirements to be followed so the warranty holds. See roofing.

Bigger footings

Nolensville amended the code's minimum footing size from 12 inches wide and 6 inches deep to 20 inches wide and 8 inches deep, and added a minimum of two pieces of #4 rebar in footings and monolithic slab footings. The amendments also require a Tennessee-licensed engineer to design slabs-above-ground. Deck footings get their own minimum: no smaller than 24 by 24 inches. For an addition, that means the foundation will cost more than a generic IRC estimate. Make sure your bids are based on Nolensville's numbers. See home additions.

Deck footings and energy code

Because of the 24-by-24-inch deck footing minimum, a deck bid in Nolensville may include more concrete than one drawn to the base code tables. The town also deleted the residential code's energy chapter and sets its one- and two-family energy code in Title 12, Chapter 8 of the municipal code, so ask your designer which energy rules apply to an addition. See decks and porches.

A drain in the crawl space

The town added a requirement for a minimum 3-inch positive drain at the lowest point of the foundation wall in under-floor (crawl) spaces. If you're adding onto a crawl-space house, the new crawl space will need one, and it's worth asking whether your existing crawl space drains properly. See basements and crawl spaces.

Local design criteria

The ordinance fills in the residential code's climate table for Nolensville: a 115 mph design wind speed, seismic design category B, "severe" weathering, a 12-inch frost line, "moderate to heavy" termite risk and a 14°F winter design temperature. Ice barrier underlayment isn't required. Flood hazards follow the latest adopted FEMA flood map. Your designer will use these figures for structure, insulation and foundation depth.

Sprinklers

The town deleted the residential code's sprinkler section and points instead to Title 7 of its municipal code for fire sprinkler requirements. Ask the codes department whether sprinklers apply to your project.

Projects that fit Nolensville homes

Finishing bonus rooms and basements. Many newer houses have unfinished space over the garage or a walk-out basement. Finishing it is usually cheaper than adding on. Basements on these lots are worth testing for radon first; the Tennessee Radon Program offers free radon test kits.

Screened porches and decks. HOA approval comes first, then the town permit.

Kitchen and bath upgrades. Builder-grade finishes in recent homes are often replaced within the first decade. See kitchen remodeling and bathroom remodeling.

HVAC. Two-story homes often struggle to keep the upstairs comfortable. Duct balancing, zoning or a second system can help. Middle Tennessee Electric primarily serves Williamson County and the counties around it, and delivers TVA EnergyRight rebates. See HVAC.

Planning a project in a newer house

Most Nolensville homes are young enough that the big systems still work, so the question is usually what to add rather than what to fix. A few habits help:

• Find your plat and HOA documents before you design anything. Easements, buffer areas and drainage swales often cross back yards in newer subdivisions, and you can't build over them.
• Check builder warranties. If the house is only a few years old, some structural or roofing items may still be covered. Altering them can void that coverage.
• Ask for bids on the same scope, written to Nolensville's footing and crawl-space amendments, so you can compare them fairly.
• Think about drainage before adding hardscape. New patios and additions change where water goes, and lots in newer subdivisions are often graded to tight tolerances.

HOAs

Most of Nolensville's newer neighborhoods have HOAs with architectural committees. Fences, outbuildings, exterior colors, roofing and additions usually need written approval.

Licensing

Williamson County isn't among the counties that adopted Tennessee's Home Improvement license law, so state licensing kicks in at $25,000 with a contractor's license. Trades have their own requirements. Verify any license on the state's Verify search.