stamp COUNTY CODE: 47187 • CUSTOM COUNTY CAMA radar REAPPRAISAL CYCLE: 4-YEAR (NEXT: 2027)

WILLIAMSON COUNTY, TN

PROPERTY TAX ROLL AUDIT & PRO SE BOARD OF EQUALIZATION INTELLIGENCE

BOARD OF EQUALIZATION STATUS
AppealWindowStatus { is_open: false, is_urgent: false, badge_label: "2026 CBOE CLOSED • PREPARING 2027", deadline_date_str: "June 20, 2026", days_remaining: None, action_recommendation: "Statutory 2026 window closed. Register roll watch for 2027 notices." }
Deadline: Third Monday in June
TOTAL PARCELS
98600
Mounted & Indexed
MEDIAN HOME VALUE
$795000
Certified Tax Roll
REAPPRAISAL SURGE
+62.1%
2023 Cycle
IAAO COD UNIFORMITY
21.4%
Severe Non-Uniformity
AVG APPEAL SAVINGS
$2150
Year 1 Direct Relief

COUNTY MASS APPRAISAL EVIDENCE CHARTS

radar CERTIFIED ROLL VISUALIZATIONS

1. TRUTH-IN-TAXATION ROLLBACK WATERFALL

Demonstrating how county tax revenue expands beyond certified revenue-neutral rates under T.C.A. § 67-5-1701.

Williamson • TRUTH-IN-TAXATION ROLLBACK AUDIT (T.C.A. § 67-5-1701) 1. PRIOR RATE $1.8800 per $100 assessed Pre-Reappraisal Levy +Roll Surge 2. CERTIFIED RATE $1.4664 per $100 assessed REVENUE NEUTRAL ✅ Vote Hike 3. PROPOSED RATE $1.8800 per $100 assessed ⚠️ +28.2% HIKE HIDDEN TAX EXPANSION: +$0.4136/$100 • UNADVERTISED COUNTY CASH HAUL: $489.8M / YEAR

2. STATISTICAL EQUITY VARIANCE DISPERSION

IAAO equity curve showing how the top quartile of residential parcels are overassessed relative to median $/sqft.

Williamson • IAAO STATISTICAL EQUITY VARIANCE CURVE IAAO TARGET ZONE (±5%) OVERASSESSED ZONE ⚠️ MEDIAN: $361.36/SQFT YOUR PROPERTY $434.36/SQFT (+20.2%) STATISTICAL UNIFORMITY DISPERSION (COD): 21.4% (EXCEEDS IAAO 15% STATUTORY THRESHOLD)

WILLIAMSON COUNTY HIGH-SURGE SUBMARKETS

scales NEIGHBORHOOD APPRAISAL DRIFTS

Williamson County Submarkets

8-YR VALUATION SURGE
Downtown Franklin Historic / Hincheyville (37064) +135.9% ($1850 avg savings)
Brentwood Estates / Concord (37027) +124.1% ($2320 avg savings)
Cool Springs Corridor / McKay's Mill (37067) +136.8% ($1680 avg savings)

Downtown Franklin Historic / Hincheyville

37064
National historic district premiums decoupled from physical square footage and building condition.
+135.9% 8-YR SURGE $1850 SAVINGS →

Brentwood Estates / Concord

37027
1-to-2 acre estate lots reassessed on commercial/subdivision development assumptions without zoning adjustments.
+124.1% 8-YR SURGE $2320 SAVINGS →

Cool Springs Corridor / McKay's Mill

37067
Corporate HQ job center proximity leading to rapid algorithmic appreciation factors applied across older tract developments.
+136.8% 8-YR SURGE $1680 SAVINGS →
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WILLIAMSON COUNTY TAX APPEAL FAQ

Third Monday in June. Appeals must be formally lodged with the Williamson County Board of Equalization before the statutory deadline expires. Filing past this cutoff forfeits your legal right to an assessment reduction for the active tax year.
No. Under Tennessee law (Tenn. Code Ann. § 67-5-1407(b)), taxpayers may execute a Written Appearance Hearing Waiver (Exhibit W). Untax automatically compiles this certified instrument, allowing the Board of Equalization to rule on your appraisal purely based on certified roll evidence without requiring your physical attendance.
We index 98600 parcels directly from the official county assessment roll. Our valuation algorithm identifies 5 to 7 certified comparable properties within your immediate neighborhood code, matching building square footage, year built, exterior wall grade, and land topography to establish mathematical non-uniformity under IAAO standards.