Brentwood, TN, is known for its acreage and established neighborhoods, and that reputation draws a steady stream of buyers who want to build rather than buy. Getting from raw land to a final inspection takes time, capital, and a clear-eyed read of what local zoning will and won't allow.

The decision comes down to one comparison: does the total cost of land, site preparation, and construction beat what you'd pay for a finished resale home? With recent shifts in the Williamson County market, that math looks different than it did a year ago.

 

Key Takeaway

Building in Brentwood means buying a lot in an established subdivision and hiring a licensed custom builder. It only pays off when your lot, construction, and fees add up to less than the median resale price per square foot that single-family homes recently sold for. If your quotes come in above that, an existing or spec home is the better buy right now, because sellers are negotiating and prices are slipping.

 

Who This Guide Is For

You're deciding whether to buy land and build a house in Brentwood or buy one that already exists, and you want to know what building costs and requires before you commit.

 

Should You Build or Buy a Home in Brentwood?

Building only beats buying when your lot, construction, and fees together come in under the resale benchmark described below. Single-family homes sold for a median of $358 per square foot in the 90 days ending September 30, 2026. Because that resale figure already includes the land, it's the most accurate benchmark for evaluating an all-in build cost. Prices are down from a year ago, sellers are accepting offers below list after 61 days on market, and the negotiating room on existing homes is something a build contract simply won't give you.

You can use the resale median to set a baseline. A typical resale size of roughly 4,000 square feet, an estimate based on dividing the median price by the median price per square foot, puts that baseline around $1,432,000. To beat it by building, the combined total of your lot, construction, site work, permits, and county new-construction tax has to stay below that number.

Once you have a lot price and a builder bid in hand, divide the total by your planned square footage and compare it to that benchmark. Building can still be the right call when the house you want doesn't exist on the market, but you'll pay a premium for that customization. To see how these figures fit into broader local trends, review the latest Brentwood housing market updates.

 

How to Choose Your Route

The path you take depends on what you already own and how much control you want over the project.

Would a home already for sale give you most of what you want? If so, read the section on when buying beats building first. A custom project has to justify its premium over the resale benchmark before it makes sense.

Do you already own land, or have a lot or older home under contract? Skip straight to the costs of building and the rules to check before buying a lot. If you care more about an established street with mature trees than a newer subdivision, buying an older home to rebuild on the lot is worth considering.

Planning to run the job yourself rather than hire a licensed builder? Read the section on acting as your own general contractor and the financing rules before anything else.

 

Three Ways to Build Your Own Home in Brentwood

The process looks different depending on your starting point. Buyers generally take one of three paths, ranging from a standard custom build to managing the entire project themselves.

Land availability, not construction capacity, is what limits new housing here. Brentwood's zoning restricts most residential areas to roughly one home per acre, which is why buildable lots are scarce and priced accordingly. The City of Brentwood's official planning guidelines set a maximum density of one dwelling unit per acre for most residential development, with some zones requiring two-acre minimums. With raw land scarce, buildable parcels inside existing neighborhoods or properties with older structures are what the data shows available to buyers. Each approach carries its own timeline, budget structure, and set of trade-offs.

Buy a Lot and Hire a Custom Builder

This is the most common route. Finding a buildable lot usually means looking inside established subdivisions rather than stumbling across untouched acreage. Once you secure the land, you'll choose a licensed builder to handle design and construction.

When you're interviewing builders, ask whether the bid is a fixed-price contract or a cost-plus agreement. That distinction determines how you absorb material price increases. Ask what the bid excludes too: site work, driveway paving, landscaping, permits, and finish allowances are common omissions that add up fast.

The downside is that many remaining lots sit inside subdivisions with architectural review boards and recorded covenants. Your design and your timeline depend on an approval you don't control.

Buy an Older Home and Rebuild on the Lot

This route appeals to buyers who want an established street and mature trees rather than a developing subdivision. The price of a teardown is mostly the land itself. Every Williamson County parcel record splits assessed value into land and improvements, so you can get a rough read on how much of an older home's price is the lot before you make an offer. Look up those values on the Williamson County Property Assessor's site.

You'll need a separate demolition permit from the city to clear the site. What you give up is efficiency: you pay for a house you'll then pay to demolish, and the existing setbacks, tree rules, and slope on the lot may cap how large the new footprint can be.

Act as Your Own General Contractor

Tennessee lets homeowners build their own residence without a contractor's license, under conditions set by the state licensing board. Under Tennessee Board for Licensing Contractors rules, a person who owns property and constructs a single residence for individual use doesn't need a contractor's license, regardless of the dollar value. The $25,000 threshold instead defines when a hired contractor must be licensed for specific trades like electrical, plumbing, or roofing.

This path is demanding. You schedule the subcontractors, you pass the inspections, and you carry the risk if something goes wrong. Construction lenders often won't finance an unlicensed owner-builder, so check with lenders before you plan this route.

 

How Much Does It Cost to Build a Home in Brentwood?

Calculating the total cost requires adding up the lot, construction, site work, soft costs, and local taxes. The land is your first major expense, and recent lot sales or county assessor records will give you a sense of current prices. Once you have the land, construction costs per square foot for the Nashville area form the bulk of your budget. Ask the builder what the bid excludes, because you'll need to account for site work separately.

Site work covers the physical preparation of the land: the driveway, grading, and either a sewer tap or septic system installation. Soft costs add another layer, covering architectural design, engineering, and City of Brentwood permit fees. The city uses an official schedule of permit fees for residential building permits, which you pay before breaking ground.

Factor in Williamson County's tax on new residential construction as well. It's a privilege tax assessed on the gross square footage of the new home. Add the lot, the construction bid, the site work, the soft costs, and the county tax together, then divide by your planned square footage. Compare that final number to the resale benchmark to see whether building makes financial sense.

 

Rules to Check Before You Buy a Lot in Brentwood

A lot's physical characteristics and legal restrictions dictate what you can build on it, and surprises here are expensive. Ask City of Brentwood Planning and Codes for the parcel's zoning, setbacks, and any hillside or tree protection rules that apply. Brentwood's zoning ordinance applies specific hillside protection standards to lots at an elevation of 850 feet or more, which can require larger minimum lot sizes, tree surveys, and a tree protection plan approved by the Planning Commission.

Neighborhood rules often add another layer. Before you buy, get the recorded covenants and architectural review guidelines from the HOA, including any minimum square footage, materials requirements, or approval timeline.

Utility access is another thing to verify before you're under contract. Confirm with the water and sewer provider whether the specific parcel can connect to sewer and what the tap fee is, or whether it needs a septic permit. The city doesn't provide sewer service to most areas east of Edmondson Pike and Sunset Road.

Finally, confirm the school assignments for the property. Check the exact lot address in the Williamson County Schools zone locator. Don't rely on a subdivision name or listing description. You can verify the specific address using the district's official lookup tool to see the zoned school and bus stop information.

 

How to Pay for a Custom Build

Financing a custom build works differently than a standard mortgage. Buyers typically use a construction-to-permanent loan, which covers the building process and then converts into a traditional mortgage once the home is finished. The bank releases money in draws as different stages of the project pass inspection, rather than handing over a lump sum at closing.

If you already own the lot, the lender will often count the land equity toward your down payment. Ask construction lenders about their required down payment, the draw schedule, the interest-only period during construction, and whether they lend to owner-builders. Buying an existing home uses a standard mortgage and closes on a known date. A construction loan requires flexibility, because timelines shift.

 

When Buying Beats Building in Brentwood

An existing single-family home is the straightforward choice if you want the most house for your money right now. In the 90 days ending September 30, 2026, single-family homes sold at a median 96.9% of list price, with 4.8 months of supply and 307 homes in inventory. Prices declined year over year, as detailed in the at-a-glance figures below.

Sellers are accepting offers below asking, and there's enough inventory to compare options without rushing. Falling prices mean an existing home bought now isn't racing a rising market while you wait out a 12-month build. If you want a new home without managing a build, start with new-construction spec homes on the market. They're already priced and can be compared directly to the resale benchmark.

We can help you compare a lot-and-build quote against current listings to see which makes the most sense for your budget. If you decide to go the existing home route, review our advice on choosing a buyer's agent and explore the lifestyle trade-offs of living in Brentwood.

 

At a Glance

  • Single-family median sale price: $1,424,432 (90 days ending 2026-09-30), down 3.3% year over year
  • Single-family median price per square foot: $358 (90 days ending 2026-09-30)
  • Single-family homes sold: 194 (90 days ending 2026-09-30)
  • Single-family median days on market: 61 (90 days ending 2026-09-30)
  • Single-family sale-to-list ratio: 96.9%, with 8.4% sold above list price (90 days ending 2026-09-30)
  • Single-family months of supply: 4.8, with 307 homes in inventory (90 days ending 2026-09-30)
  • All homes median sale price: $1,349,357, down 3.6% year over year, median $349 per square foot, 208 sold (90 days ending 2026-09-30)
  • Townhouse median sale price: $382,455, down 9.8% year over year, 112 median days on market, 99.5% sale-to-list (90 days ending 2026-09-30). Based on only 10 townhouse sales, so treat it as a rough signal.

 

Building a Home in Brentwood FAQs

Is Brentwood, TN in Williamson County or Davidson County?

The City of Brentwood is in Williamson County, which issues building permits within city limits. However, the 37027 ZIP code also includes pockets of southern Davidson County. Properties in that Davidson County portion fall under the Metropolitan Government of Nashville and Davidson County, meaning permits go through Metro Nashville Codes instead.

How Much Are Houses in Brentwood, TN Right Now?

The median sale price for a single-family home in Brentwood is roughly $1,424,432, based on the 90 days ending September 30, 2026. Review our Brentwood housing market updates to see how pricing and inventory are trending this season.

Can I Sell a House I Built as an Owner-Builder in Tennessee Right Away?

No. Per the Tennessee Department of Commerce and Insurance, an owner may construct a single residence once every two years for their own use without a contractor's license, provided the home is not for resale, lease, or rent. You must hold the property for that duration if you build under the owner-builder exemption.

Does Williamson County Charge a Tax on New Home Construction?

Yes. Under the Williamson County Adequate Facilities Tax and the Adequate School Facilities Tax, the county imposes a combined residential privilege tax of $2.00 per gross square foot of new residential development. This tax is payable when a building permit or certificate of occupancy is issued.

Can You Build a Smaller House, Like 2,000 Sq Ft, in Brentwood?

It depends on the specific neighborhood rules. Subdivision covenants often set minimum square footage requirements, so get the recorded restrictions for the specific lot. Ask the city about any zoning constraints that apply to your parcel.

How Long Does It Take to Get a Building Permit in Brentwood, TN?

The timeline varies based on the scope of the project and current city workloads. HOA architectural approval may need to come first, so ask the HOA for its review timeline too. Check with the City of Brentwood Planning and Codes department for current plan review times on new single-family residences.

 

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