155 William St, West Haven — property record card
THREE FAM built in 1921, 5 bed, 3 bath, 3,077 ft² in West Haven, appraised at $479,900 (assessed $335,930); last sold for $615,000 on May 29, 2025.
Parcel
| Location | 155 William St, West Haven CT 06516 |
|---|---|
| Parcel ID | 027-0383-0-0000 |
| CAMA account | 82870-6945 |
| Use | THREE FAM |
| Zone | R3 |
| Planning region | South Central Connecticut |
Valuation — revaluation 2024
| Appraised (market value) | $479,900 |
|---|---|
| Assessed (70%) | $335,930 |
Building
| Year built | 1921 |
|---|---|
| Living area | 3,077 ft² |
| Rooms | 16 |
| Bedrooms | 5 |
| Bathrooms | 3 full |
| Condition | good |
| Units | 3 |
Sales
| Last sale | $615,000 — May 29, 2025 |
|---|
Within about 500 m (a third of a mile): 2 sites of the state brownfield inventory. Brownfields in West Haven.
What this means
- Connecticut taxes property at 70% of its appraised market value: the assessment $335,930 times the town mill rate gives the yearly tax.
- West Haven last revalued in 2024. Towns revalue every five years; between two revaluations the appraisal stays the same even if the market moves.
- Assessed 14% above the median for this use in West Haven ($293,475, 484 parcels).
- The last sale price is 28% above the appraisal.
- Built before 1978: lead paint may be present; Connecticut law requires disclosure to a buyer or tenant.
The report for 155 William St
This card shows what the assessor records. The report adds what lies around the parcel: FEMA flood zone, wetlands and watercourses, aquifer protection area, Natural Diversity Database areas, brownfields nearby and sewer service.
$19card · PDF within 24 h · you pay after receiving itSee the sample (PDF)