Tap fees, development fees, and capacity fees for all water and sewer providers serving Williamson County, TN — verified from official sources, 2025–2026.
Williamson County has no unified water system. Eight separate providers each set their own rates. For new construction, two primary charges apply: a tap fee for physically connecting to the water main, and a development or capacity fee paid to reserve infrastructure capacity.
| Provider | Primary Service Area | Tap / Access Fee (New Construction) | Development / Capacity Fee | Other Fees |
|---|---|---|---|---|
| City of Franklin Water ↗ (615) 794-4572 |
Franklin City of Franklin (4 water districts serve the city) |
All sizes — varies by project Contact Engineering Dept. | SFUE-based — varies by project Contact Engineering Dept. | $50 application fee $25 connection fee (new construction) |
| H.B. & T.S. Utility District ↗ (615) 794-7796 |
Franklin Franklin east & south, portions of Brentwood |
Contact office for new construction | Contact Troy Watkins (615) 794-7796 | $100 connection fee (new customer) $20 connection fee (returning customer) |
| Milcrofton Utility District ↗ (615) 794-5947 |
Eastern Williamson Co. 94.2 sq mi service area |
3/4" $6,500 total 1" $6,860 total Increasing annually through 2027 | 3/4" $4,000 (Oct. 2025) → $5,000 Oct. 2026 · $6,000 Oct. 2027 1" $6,100 (Oct. 2025) → $7,000 Oct. 2026 · $8,000 Oct. 2027 | $100 application fee (all sizes) $2,000 installation fee (3/4") $400 meter fee (3/4") $200 inspection fee (1") $560 meter fee (1") |
| Mallory Valley Utility District ↗ (615) 628-0237 |
Brentwood
Franklin W. Brentwood & Franklin (Cool Springs) |
Not published — call office | Not published — call office | Not published — call office |
| Nolensville / College Grove Utility District ↗ (615) 776-2511 | Nolensville College Grove | Not published — call or visit office | Not published — call or visit office | $75 connection fee |
| City of Brentwood Water Services ↗ (615) 661-7061 |
Brentwood Central Brentwood (E. & W. portions may differ) |
Contact city for new construction | Contact city for new construction | $25 setup fee (residential) $50 setup fee (commercial) |
| Harpeth Valley Utilities District (HVUD) ↗ (615) 352-7076 |
Brentwood
W. Williamson Co. Parts of Davidson, Williamson & Cheatham counties |
5/8" $1,600 1" $4,000 Rates effective Jan. 1, 2025 | Included in tapping privilege fee Capacity + tap combined. Service assembly costs (meter, box, fittings, pavement repair) borne by purchaser. | $35 service initiation fee $300 fee per metered fire connection or private/public fire hydrant 10% admin & inspection fee on fair market construction cost when main extension required |
| City of Spring Hill Water ↗ (931) 486-2252 |
Spring Hill Williamson Co. portion (also serves Maury Co.) |
5/8" $1,300 tap fee + $185.65 meter fee ~30% rate increase July 2025 | 5/8" $1,491 development fee | $185.65 meter fee (5/8") $50 connection fee (new customer) |
| Water Authority of Dickson County (WADC) ↗ (615) 441-9511 |
Fairview City of Fairview; also Dickson, Hickman & Humphreys Co. |
3/4" $950 (existing main) 1" $1,350 (existing main) New main (by others): 3/4" $300 · 1" $450 Rates effective March 1, 2026 | 3/4" $2,500 1" $6,250 | $60 service connection fee (residential) $100 service connection fee (commercial) $1,000 application / capacity study fee $500 plan review fee (non-residential) |
Data sourced from official provider websites and published fee schedules (2024–2026). Fees are subject to change without notice. Always verify current rates directly with each provider before finalizing construction budgets. See an error? Report it here.
Sewer service in Williamson County is more fragmented than water — several providers handle wastewater independently of the water utility serving the same address. Some areas, particularly in Milcrofton's water district and rural parts of the county, rely on private septic systems. Notable is that Metro Water Services (Nashville) provides sewer service deep into Williamson County, including parts of Nolensville and eastern Brentwood.
| Provider | Primary Service Area | Sewer Tap Fee (New Construction) | Sewer Capacity / Development Fee | Other Fees |
|---|---|---|---|---|
| City of Franklin Wastewater ↗ (615) 794-4572 |
Franklin City of Franklin (sewer service area) |
All sizes — varies by project Contact Engineering Dept. | SFUE-based — varies by project Contact Engineering Dept. | $50 application fee $25 connection fee (new construction) |
| City of Brentwood Sewer ↗ (615) 661-7061 |
Brentwood Central & western Brentwood (east of Edmondson Pike / Sunset Road generally excluded) |
Contact city for new construction | Contact city for new construction | $25 setup fee (residential) $50 setup fee (commercial) |
| Metro Water Services (Nashville) ↗ (615) 862-4600 |
Nolensville
E. Brentwood Parts of Williamson County, Nolensville area, eastern Brentwood |
6" $360 Min. connection size is 6" Fees effective Jan. 28, 2025 | All $2,300 per unit (350 GPD) Fees effective Feb. 1, 2024 | $35 service initiation fee (same-day) $25 service initiation fee (standard) |
| Harpeth Valley Utilities District (HVUD) ↗ (615) 352-7076 |
Brentwood
W. Williamson Co. Parts of Davidson, Williamson & Cheatham counties |
3/4" $3,100 1" $7,800 2" $24,800 3" $49,600 4" $77,500 Rates effective Jan. 1, 2025 | Included in tapping privilege fee Capacity + tap combined. Service assembly costs borne by purchaser. | $35 service initiation fee |
| City of Spring Hill Sewer ↗ (931) 486-2252 |
Spring Hill Spring Hill sewer service area (Williamson & Maury Co. portions) |
Contact city — TDEC Consent Order WPC2025-0093 Sewer moratorium in effect (Ord. 25-29, Jan. 2026) | Multi-year plan — contact city ~30% increase effective July 2025 (Ord. 24-10) | $50 connection fee (new customer) |
| Town of Thompson's Station Wastewater ↗ (615) 794-4333 ext. 4 |
Thompson's Station Selected subdivisions only |
$6,833.76 Builder portion | $11,801.24 Developer portion | $75 residential deposit |
| Water Authority of Dickson County (WADC) ↗ (615) 441-9511 |
Fairview City of Fairview and portions of Dickson, Hickman & Humphreys Co. |
All sizes: $500 + materials (existing main, installed by WADC) New main (by others): no tap charge Rates effective March 1, 2026 | 3/4" $3,700 1" $9,250 2" $29,600 4" $111,000 | $60 service connection fee (residential) $100 service connection fee (commercial) $1,000 application / capacity study fee |
| Private Septic Systems ↗ Williamson Co. Health Dept: (615) 790-5723 |
Rural / Unserved Areas Areas without public sewer (much of Milcrofton's water district and rural county) |
N/A — private installation | N/A — private installation | Septic permit required from Williamson Co. Health Dept. |
Sewer provider data sourced from official provider websites and published fee schedules (2024–2026). Sewer coverage boundaries are complex and parcel-specific — always confirm the applicable provider directly before development. See an error? Report it here.
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