Tennessee's #1 fastest-growing county by percentage from 2020 to 2024 — a Nashville suburb under intense development pressure, with a unique flat-fee Adequate Facilities Tax structure that applies county-wide to every new residential permit.
Wilson County is Tennessee's undisputed growth leader. From 2020 to 2024, it ranked #1 in the state for percentage population growth — absorbing more than 280 new residents per month, a pace that has strained roads, schools, and public services beyond what existing revenue streams can easily cover. As of the 2024 Census estimates, the county's population stands at approximately 170,000, with projections approaching 175,700 by 2025 — a 53% increase from 2010's count of 114,000.
The county's 72,066 housing units lean heavily toward detached single-family homes, and its three incorporated cities — Mt. Juliet (the largest and fastest-growing), Lebanon (the county seat), and Watertown (the smallest and most rural) — each have distinct housing markets and development dynamics. The county is part of the Nashville MSA, with Mt. Juliet situated just 25 minutes from downtown Nashville via I-40, making it one of the region's most in-demand suburban destinations.
For developers and builders, Wilson County's fee environment centers on a single county-wide instrument: the Adequate Facilities Tax (AFT), a flat $5,000 charge per new residential unit that applies regardless of home size or location. Collected at permit issuance by the county Building Codes Division — and also for Lebanon, Mt. Juliet, and Watertown — the AFT funds broad capital needs including schools, roads, jails, and public safety infrastructure. Revenue is shared equally between the county and whichever municipality the permit falls within. In total, the county generates approximately $16.9 million per year in AFT revenue, though elected officials and school leaders have made clear that this amount falls far short of what rapid enrollment growth demands.
Pressure for higher development fees has intensified on multiple fronts. In 2024, Wilson County was included in state-level legislation — House Bill 2426 — that would have authorized five fast-growing counties (including Wilson, Rutherford, Williamson, Maury, and Montgomery) to raise their adequate facilities taxes by up to 50% and adjust rates every four years thereafter. The bill stalled in committee amid opposition from the Tennessee Realtors Association. Separately, commissioners have responded to community demands by tightening minimum lot size requirements, doubling agricultural zone minimums from 40,000 to 80,000 square feet in November 2025 in an effort to slow the pace of residential subdivision in rural areas.
Local reporting and public records covering Wilson County's development fee landscape and growth policy debates.
With the Wilson County Courthouse packed by residents, commissioners voted to increase minimum lot sizes in agriculturally zoned areas to 80,000 square feet — nearly two acres — up from the previous 40,000-square-foot floor. The vote reflected growing community frustration with residential density, traffic congestion, and strain on sewage systems. County Mayor Randall Hutto noted that despite the growth, 69% of the county remains open space. Developers and farming advocates are watching closely as the county's broader land use plan update continues.
Read Full ArticleSuncrest's Barton Village development — 350 acres off South Hartmann Drive and I-40 in Lebanon — broke ground as one of the largest master-planned communities in the county's history. The project includes nearly 2,000 homes alongside dining, shopping, office, and medical uses, modeled after McEwen Northside in Franklin. The development also includes a Del Webb active adult community, with a grand opening targeted for spring 2025. Lebanon was simultaneously named the 12th fastest-growing city in the United States, underscoring Wilson County's remarkable absorption of Nashville's suburban overflow.
Read Full ArticleHouse Bill 2426, introduced in the 2024 legislative session, would have authorized Wilson, Rutherford, Williamson, Maury, and Montgomery counties to increase their adequate facilities taxes by 50% immediately and adjust rates by up to 10% every four years. Wilson County already collects approximately $16.9 million annually in AFT revenue from roughly 20,549 school enrollees — but leaders argue the flat $5,000 per unit is increasingly insufficient to offset the $400M+ in school construction debt the county carries. The bill stalled in committee amid lobbying opposition from the Tennessee Realtors Association and the Home Builders Association.
Read Full ArticleBuilding a new single-family home in Wilson County triggers the county's Adequate Facilities Tax (AFT) — a flat $5,000 per residential unit, regardless of square footage or location within the county. This fee is collected at the time of building permit application by the Wilson County Building Codes Division, which also collects on behalf of Lebanon, Mt. Juliet, and Watertown. When a permit is issued within city limits, 50% of the collected AFT is remitted to the county and 50% is retained by the municipality. The AFT funds broad public capital needs — schools, roads, jails, bridges, ambulances, and public safety facilities — and is used for debt service and shorter-term capital projects. Unlike neighboring Sumner County's per-square-foot charge, Wilson County's flat-fee structure means the per-permit cost is the same for a 1,200 sq ft starter home as it is for a 3,500 sq ft custom build. No additional city-level impact fees are currently in effect in Mt. Juliet, Lebanon, or Watertown.
* The $5,000 AFT applies per dwelling unit to all new residential construction, including individual homes, condos, and individual apartment units. It is collected by the Wilson County Building Codes Division at 233 E. Gay Street, Lebanon, TN 37087. The building permit fee itself ($0.70 per sq ft of heated space, attached garage, bonus rooms, sunrooms, and finished basements) is a separate charge from the AFT and is not a development impact fee. Revenue sharing: when development occurs within the incorporated limits of Lebanon, Mt. Juliet, or Watertown, 50% of AFT collected flows to the municipality and 50% to the county. Lebanon Tenth Special School District receives an additional share of proceeds collected within its boundaries. Sources: Wilson County Building Codes FAQ · Wilson County Building Codes Division · How Wilson County Schools and Services Are Funded (2022). Always verify current rates with the Wilson County Building Codes Division prior to finalizing project pro formas.
Wilson County's three incorporated municipalities — each with its own development review process and distinct housing market, while sharing the county-wide AFT structure.
The largest and fastest-growing city in Wilson County, Mt. Juliet sits 25 minutes east of downtown Nashville on I-40, making it one of the region's most in-demand suburban addresses. City Commissioner Jennifer Milele noted that developers pay millions toward infrastructure, and the city has no separate city-level impact fee beyond the county AFT. A proposed high-density housing moratorium was rejected in late 2025, with commissioners citing the city's critical role in regional housing supply. New construction listings in Mt. Juliet cluster between $550,000 and $675,000, with Toll Brothers and Del Webb active in the market.
Lebanon is Wilson County's county seat and a major growth hub in its own right — ranked the 12th fastest-growing city in the United States as of 2024. The city is home to Barton Village, a 350-acre, nearly 2,000-home master-planned community under development near I-40. Lebanon does not levy a separate city impact fee; new residential construction is subject to the county-wide AFT of $5,000. The Lebanon Tenth Special School District — a separate school system operating within Lebanon city limits — receives a proportional share of AFT revenue in addition to the county. Median resale prices in Lebanon sit around $390–$447K, offering the most accessible price point among the three cities.
Watertown is Wilson County's smallest and most rural incorporated community, situated in the eastern portion of the county beyond the suburban growth frontier. It has no separate city-level impact fee, and new construction is subject to the standard county AFT of $5,000 per unit, collected through the county Building Codes Division on the town's behalf. Watertown has been largely insulated from the development pressure concentrated in Mt. Juliet and Lebanon, and its housing market reflects that — median values around $420K make it the most affordable incorporated community in the county. It sits at the center of growing community debates about preserving rural character as development pressure edges eastward.
Wilson County's flat-fee AFT structure is straightforward today — but the county's extraordinary growth rate, mounting school construction debt exceeding $430 million, and repeated attempts to raise development fees through state legislation make this a market where fee exposure can change quickly. Add the distinct revenue-sharing split between the county and its three cities, the Lebanon Tenth Special School District's claim on proceeds, an updated land use plan still in progress, and new minimum lot size restrictions in agricultural zones — and the stakes for accurate due diligence have never been higher.