Williamson County, Texas - County Development Fees
Williamson County | County | Central Texas / I-35 Corridor (north Austin metro) | Austin-Round Rock-Georgetown, TX MSA | County seat: Georgetown | FIPS 48491
Williamson County is a fast-growing Central Texas county along the I-35 corridor north of Austin. Six incorporated cities inside or partly inside the county - Georgetown (county seat), Round Rock, Cedar Park, Leander, Hutto, and Pflugerville - each have their own ZoneFee jurisdiction records. Williamson County administers developer-side fees through its Subdivision Regulations, adopted and effective March 4, 2025, which consolidate plat review, construction plan review, construction inspection, and variance fees in Appendix N - Fee Summary. Plat review and approval authority varies by extraterritorial jurisdiction (ETJ): the county directly reviews plats in unincorporated areas and in the Coupland, Jarrell, Pflugerville, and Williamson County ETJs, while most municipal ETJs are reviewed by the respective city per Appendix E. As a Texas county, Williamson County does not levy municipal-style impact fees and does not operate a water or wastewater utility.
Recent Fee Changes
Williamson County Subdivision Regulations adopted and effective March 4, 2025. The March 4, 2025 regulations supersede the prior 2021A regulations (adopted June 22, 2021). The revision changed Construction Plan Review to $1.25 per foot of road and added a separate Construction Inspection line ($50 per lot plus $1.85 per foot of road), replacing the prior percentage-of-construction-cost inspection method. The current Appendix N Fee Summary applies to all new applications received on or after March 4, 2025. Developers working from older fee tables should confirm against the March 4, 2025 version, not the superseded 2021A regulations.
Fee Summary
| Fee Type | Status | Top-Line Figure | Effective Date |
|---|---|---|---|
| Subdivision Plat Review | Confirmed | Preliminary Plat $550 + $40/lot; Final Plat $550 + $1/ft of road + $25/lot; Minor Plat $550; Replat / Amendment $550 | March 4, 2025 |
| Construction Plan Review and Inspection | Confirmed | Construction Plan Review $35/lot + $1.25/ft of road; Construction Inspection $50/lot + $1.85/ft of road | March 4, 2025 |
| Variances and Vacations | Confirmed | Variances $250 per type; Vacation of R.O.W. or Easement $100; Public Notice $100 + actual cost | March 4, 2025 |
| Impact Fees (water / wastewater / roadway) | Not applicable at county level | Texas counties generally lack impact-fee authority under TLGC Chapter 395; developer-side capital recovery occurs through plat, construction plan review, and construction inspection fees | - |
| Utility Tap Fees (water / wastewater connection) | Not administered by Williamson County | County does not operate a water/sewer utility; service is via in-county cities, MUDs, WCIDs, and regional supplier LCRA, each with separate developer-side schedules | - |
| Proffers | Not applicable | Texas does not use proffer agreements (Virginia statutory framework only) | - |
| Special District Fees (MUD / PID) | Authority-record material | In-county MUDs and PIDs are separate political subdivisions with their own developer-side fee schedules; not captured on the county jurisdiction record | - |
Williamson County Subdivision Regulations - Appendix N Fee Summary
Statutory authority: county subdivision and platting authority under Texas Local Government Code Chapter 232, applied through the Williamson County Subdivision Regulations adopted by Commissioners Court (Resolution and Order dated March 4, 2025). Administered by: Williamson County Development Services / Road and Bridge. The Subdivision Regulations Appendix N - Fee Summary is the county's authoritative consolidated developer fee schedule for platting and construction review. Plat review and approval authority varies by ETJ per Appendix E - the county directly reviews plats in unincorporated areas and in the Coupland, Jarrell, Pflugerville, and Williamson County ETJs, while Austin, Cedar Park, Georgetown, Granger, Hutto, Leander, Liberty Hill, Round Rock, Taylor, and other municipal ETJs are reviewed by the respective city.
Subdivision, Plat, and Construction Fees (Effective March 4, 2025)
| Fee Type | Fee |
|---|---|
| Preliminary Plat Review | $550 + $40 per lot |
| Final Plat Review | $550 + $1 per foot of road + $25 per lot |
| Construction Plan Review | $35 per lot + $1.25 per foot of road |
| Construction Inspection | $50 per lot + $1.85 per foot of road |
| Minor Plat Review | $550 |
| Replat / Amendment of Final Plat | $550 |
| Public Notice | $100 + actual cost |
| Variances | $250 per type |
| Extension of Preliminary Plat | No fee (no modifications); $30 per lot for only the lots being modified |
| Vacation of R.O.W. or Easement | $100 |
| Hard Copy of Regulations | $10 |
Source: Williamson County Subdivision Regulations, adopted and effective March 4, 2025 (102-page official PDF), Appendix N - Fee Summary, published on the Williamson County Development Services and Drainage page (SHA-256 69fbcc8f...). The March 4, 2025 revision supersedes the prior 2021A regulations (adopted June 22, 2021). On-site sewage facility (OSSF, septic) and floodplain development permit fees, where separately administered by the Williamson County and Cities Health District or a designated agent, are not enumerated in Appendix N and are not captured on this page.
Coverage Notes - What This Page Does Not Cover
Per ZoneFee's Partial-Verified Publication Standard, the items below were not closed via confirmed fee amounts on this page. They are disclosed here rather than estimated or omitted silently.
Impact Fees (Water, Wastewater, Roadway)
Texas counties generally lack impact-fee authority under Texas Local Government Code Chapter 395, which conditions the imposition of statutory water, wastewater, and roadway impact fees on political subdivisions meeting specific municipal-style criteria. The authoritative Williamson County Subdivision Regulations (March 4, 2025) Appendix N Fee Summary contains zero impact-fee line items. The county's developer-side road and drainage capital recovery occurs through the per-lot and per-foot-of-road subdivision plat, construction plan review, and construction inspection fees captured above. Closed-search outcome: this fee family does not apply to this jurisdiction.
Utility Tap Fees (Water and Wastewater Connection)
Williamson County does not operate a water or wastewater utility. Service in the county is provided by cities (Georgetown, Round Rock, Cedar Park, Leander, Hutto, Pflugerville, Taylor, and others), Municipal Utility Districts (MUDs), Water Control and Improvement Districts (WCIDs), and regional supplier LCRA. Tap and meter installation fees are administered by those city utilities and special-district authorities, not by Williamson County government. The authoritative county Subdivision Regulations Appendix N Fee Summary contains no water or sewer tap or connection fee line items. Closed-search outcome: not administered by this jurisdiction.
Proffers
Cash proffers are a Virginia statutory framework only (Va. Code 15.2-2303). Texas jurisdictions do not use cash proffers. Williamson County's developer-side capital contribution occurs through the subdivision plat, construction plan, and construction inspection fees captured above, together with standard right-of-way, drainage, and utility easement dedication under the Subdivision Regulations. Closed-search outcome: this fee family does not apply to this jurisdiction.
Special District Fees (MUD / PID)
Williamson County contains numerous Municipal Utility Districts and Public Improvement Districts, each a separate political subdivision with its own developer-side fee schedule. These belong on dedicated authority records under ZoneFee's Texas authority directory rather than the Williamson County jurisdiction record. The authoritative county Subdivision Regulations Appendix N Fee Summary does not enumerate sub-district MUD or PID rate schedules. Closed-search outcome: authority-record material; not administered by Williamson County.
OSSF (Septic) and Floodplain Permit Fees
On-site sewage facility (OSSF, septic) and floodplain development permit fees, where separately administered by the Williamson County and Cities Health District or a designated agent, are not enumerated in Subdivision Regulations Appendix N. A future ZoneFee source review will target the Health District schedule directly to expand the county's development-fee coverage.
Fee Authorities
| Authority | Fee Types | Official Website |
|---|---|---|
| Williamson County Development Services / Road and Bridge | Subdivision and plat review, construction plan review, construction inspection, variances, and vacations (Subdivision Regulations Appendix N - Fee Summary) | wilcotx.gov/639/Development-Services-Drainage |
| In-County City Records (separate ZoneFee pages) | Georgetown (county seat), Round Rock, Cedar Park, Leander, Hutto, and Pflugerville administer their own municipal developer-side fees - see in-county city links below | See Georgetown, TX, Round Rock, TX, Cedar Park, TX, Leander, TX, Hutto, TX, Pflugerville, TX |
Sources
| Document | Agency | Accessed |
|---|---|---|
| Williamson County Subdivision Regulations, adopted and effective March 4, 2025 (Appendix N - Fee Summary) - 102-page official PDF | Williamson County Commissioners Court (Development Services / Road and Bridge) | 2026-06-08 |
| Williamson County Development Services and Drainage landing page | Williamson County Development Services and Drainage | 2026-06-08 |
Last verified by ZoneFee: 2026-06-08. Fee schedules are subject to change. Verify current rates directly with Williamson County Development Services before relying on this data for any financial decision.
This page reflects fee data sourced from the Williamson County Subdivision Regulations, adopted and effective March 4, 2025 (Appendix N - Fee Summary), published on the Williamson County Development Services and Drainage page. ZoneFee does not guarantee that fee amounts are current at the time you read this page. Fee schedules change. The March 4, 2025 regulations supersede the prior 2021A version; developers working from older tables should confirm against the current March 2025 schedule. On-site sewage facility (OSSF, septic) and floodplain development permit fees administered by the Williamson County and Cities Health District are not yet enumerated on this page; a future ZoneFee source review will target them directly. Williamson County is not a water or sewer utility provider; tap, meter, and capital recovery fees for water and wastewater connections are administered by the cities, Municipal Utility Districts, Water Control and Improvement Districts, and regional supplier LCRA that serve individual tracts, each as a separate political subdivision with its own developer-side schedule. Texas counties do not generally impose statutory impact fees under Texas Local Government Code Chapter 395, and Texas jurisdictions do not use Virginia-style cash proffers. Six city records inside or partly inside Williamson County publish their own ZoneFee pages: Georgetown (the county seat), Round Rock, Cedar Park, Leander, Hutto, and Pflugerville. Verify all current rates directly with Williamson County Development Services before relying on this data for land acquisition, project budgeting, or any financial decision. This page is for research and due-diligence reference only - it is not legal or financial advice.