The Fair Share Report
21 Button Mill Rd
Upper Deerfield, NJ 08302
The town corrects for market drift once a year — but only on average. This report measures whether this house drifted with the herd or away from it.
This home's full record →Check another house →
Step 1 · Market value
Likely range $294,433 – $481,552, from 12 comparable Upper Deerfield sales in the past 18 months (home size estimated from assessor data — range widened).
Step 2 · The Director's Ratio
The state's official measure of how far Upper Deerfield assessments sit below market value — republished every October, applied town-wide. A $386,386 home should be assessed near $267,765.
Step 3 · Assessed value
Set at the last town-wide revaluation and mostly frozen since. That's $21,165 below what the ratio math suggests (7.9%).
Step 4 · The tax rate — same for every Upper Deerfield home
$1.925 Schools · 59% $1.176 County · 36% $0.189 Town · 6%
Step 5 · The bill
This home vs. every recent Upper Deerfield sale · assessed ÷ market
36%89%
Paying about right
This home's ratio lands inside Upper Deerfield's normal band. The drift hasn't singled it out — no case for a tax appeal.
The evidence · comparable sales (SR1A usable-sale records)
| Address | Sold | Price | Sq ft | Ratio |
|---|---|---|---|---|
| 86 SENTRY DR | 2025-01 | $416,500 | 1,969 | 57.0% |
| 1 JOHN'S WAY | 2026-05 | $449,900 | 2,208 | 53.0% |
| 144 SILVER LAKE RD | 2025-09 | $330,000 | 2,016 | 66.9% |
| 230 OLD DEERFIELD PIKE | 2025-02 | $330,000 | 2,438 | 52.2% |
| 1 PATRIOT LN | 2025-02 | $318,000 | 2,292 | 69.4% |
| 14 1/2 SMITH DR | 2026-01 | $250,000 | 1,760 | 82.4% |
| 162 SEELEY RD | 2026-06 | $370,000 | 2,100 | 57.9% |
| 22 QUAIL RIDGE DR | 2025-05 | $390,000 | 2,160 | 55.6% |
| 45 ACORN DR | 2025-12 | $255,000 | 2,860 | 90.3% |
| 3 TUNBRIDGE DR | 2025-11 | $430,000 | 2,448 | 55.2% |
| 30 OAK HILL DR | 2025-02 | $416,000 | 2,403 | 57.6% |
| 10 KRYSTA COURT | 2025-08 | $485,000 | 2,020 | 68.3% |
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