Williamson County Unincorporated Area, TN
Prototype: 2,000 sq ft single-family detached, 3 bed / 2 bath, 3/4-inch water meter, 400 sq ft garage.
Impact fees verified. Not a full total. Verified from the Williamson County Schedule of Permit Fees (undated posted schedule): residential privilege tax $2.00 per SF (2,000 sq ft heated assumed; county-wide including cities), building permit by valuation on computed valuation $380,268, and plan-checking fee (half the permit). NOT included: the Williamson County education impact fee (assessed per housing unit by size; the 2023 schedule was not found, 2020 figures are outdated), plumbing/mechanical/electrical permits, stormwater review $150 per platted lot, water/sewer (cities and utility districts). Page never shows a total. 2026-11-09.
Water/sewer provider:
| Line | Printed rate | Prototype | Receipt |
|---|---|---|---|
| Privilege tax, residential impact · computed | $2.00 per SF (including cities) per square foot | $4,000 | $2.00 x 2,000 sq ft heated (assumed) = 4,000.00 Effective undated Source · Williamson County Schedule of Permit Fees, Privilege Tax fetched 2026-11-09, sha256 bf146828da88 |
| Building permit (valuation-based) permit · computed | $460.00 for the first $100,000 plus $3.00 for each additional thousand or fraction thereof percent of valuation | $1,303 | Valuation $380,268 (ICC BVD R-3 V-B 175.92 x 2,000 sq ft + U V-B 71.07 x 400 sq ft); $460 + 281 x $3 = 1,303.00 Effective undated Source · Williamson County Schedule of Permit Fees, B101 Permit fetched 2026-11-09, sha256 bf146828da88 |
| Plan-checking fee permit · computed | one-half of the building permit fee percent of permit fee | $651.50 | 50% x 1,303.00 = 651.50 Effective undated Source · Williamson County Schedule of Permit Fees, B105 Plan-Checking fetched 2026-11-09, sha256 bf146828da88 |
Fee-change calendar
- None recorded
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