Deck builders in Brentwood, TN

The median home in Brentwood was built around 1996. A deck built with a house of that age is now about 30 years old — the stage where first-generation pressure-treated decks commonly need major repair or replacement.

Decks built before 2004 were very likely made with CCA-treated lumber, which was phased out of most residential uses at the end of 2003. That doesn't make an existing deck unsafe, but old boards shouldn't be burned, and demolition debris should be disposed of according to local rules.

That makes Brentwood's housing 6 years older than Williamson County as a whole, where the median home was built in 2002. Statewide, the median Tennessee home was built in 1987. Among the 20 covered Tennessee communities with Census data, Brentwood ranks #9 for oldest housing. In this ZIP code, 2% of homes were built before 1960, 17% between 1960 and 1979, 39% between 1980 and 1999, and 42% since 2000 — the single largest group dates to the 2000s.

The nearest NOAA climate station with 1991–2020 normals is Brentwood. It records an average of 98 days a year with a low at or below 32°F — a moderate number of freezing nights. On roughly 91 of those days the temperature climbs back above freezing, so water in wood, soil and gaps between boards repeatedly freezes and thaws.

Frost is less severe in Brentwood than in northern states, but footings still have to meet the local frost-depth requirement, and freeze-thaw cycles are enough to work loose nails and open checks in unsealed wood.

Snowfall is light — about 1.7 inches in an average year at Franklin Sewage Plt — so occasional ice is a bigger concern than snow load. Textured boards and good drainage on stairs help on icy mornings.

Brentwood sees about 53.7 inches of precipitation a year, with measurable rain or snow (0.1 inch or more) on about 86 days. Good drainage between boards, clean gaps and a ledger that is properly flashed keep that water from rotting the frame.

Summers are hot: average summer highs are near 88°F, with about 51 days a year reaching 90°F or more. Surface temperature is a real consideration — lighter board colors, shade from the house or a pergola, and heat-mitigating composite lines are worth comparing.

Because so many Brentwood homes were built after 2000, matching the deck to vinyl or fiber-cement siding and existing trim colors is often part of the material decision.

Brentwood has about 23,601 housing units across its covered ZIP code. 78% are single-family detached homes, 6% are attached homes such as townhouses and rowhouses, and about 16% are in buildings with two or more units. Roughly 82% of occupied homes are owner-occupied.

Detached single-family homes dominate in Brentwood, so most decks are backyard decks attached to the rear of the house. That gives more freedom on size, layout and stairs, and makes a well-planned deck one of the most-used rooms of the home.

• Replacement and major repair: about 12,237 homes (52%) were built between 1970 and 1999, the age group whose original or early add-on decks are most likely to have worn-out framing, connectors and boards.
• Upgrades and expansions: about 4,470 homes (19%) were built since 2010. Their decks are usually sound but small or builder-grade, so enlarging the deck, adding stairs and switching to composite or upgraded railings are common.
• Retrofit decks on older homes: about 1,532 homes (6%) predate 1970. Here the priority is confirming that add-on decks are properly attached — or rebuilding them freestanding — before any cosmetic work.

Brentwood has a defined building season. Spring and early fall offer the most comfortable working weather; winter is a good time to settle the design and apply for permits. Stains and sealers generally need dry weather and moderate temperatures, so plan wood finishing for late spring or early fall.

For Brentwood, TN, ask the permit office whether your deck needs a permit based on its size, height and attachment to the house, which drawings and inspections are required. Statewide code background for Tennessee is on our state page; local rules change, so the building department remains the authority.

The closest covered area is Nolensville, about 8.4 miles from the center of Brentwood's covered ZIPs. Its median home was built in 2012, 16 years later than in Brentwood. Brentwood has 12 percentage points fewer detached single-family homes (78% vs. 90%), which changes how many projects are backyard decks versus compact townhouse decks. Owner-occupancy is 82% in Brentwood compared with 93% in Nolensville. Brentwood's covered ZIP code span about 57 square miles of land with roughly 23,601 homes — about 414 per square mile, a low density that usually allows larger decks and freestanding designs.