21 Clark St Ext, Derby — property record card
Residential built in 2007, 3 bed, 2.5 bath, 2,256 ft² in Derby, appraised at $547,100 (assessed $382,970); last sold for $545,000 on January 29, 2026.
Rebuilt from the public Connecticut CAMA and Parcel Layer — not the official card. For the official card, with owner, photo and sketch, ask the Derby assessor’s office.
Parcel
| Location | 21 Clark St Ext, Derby CT 06418 |
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| Parcel ID | 6-11 41A |
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| CAMA account | 19550-1982 |
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| Use | Residential (state use code 100) |
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| Zone | R-3 |
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| Planning region | Naugatuck Valley |
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Valuation — revaluation 2025
| Appraised (market value) | $547,100
land $83,500 · building $463,600 |
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| Assessed (70%) | $382,970
land $58,450 |
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Building
| Year built | 2007 (effective 2020) |
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| Living area | 2,256 ft² |
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| Rooms | 6 |
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| Bedrooms | 3 |
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| Bathrooms | 2 full, 1 half |
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| Condition | 6 |
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Sales
| Last sale | $545,000 — January 29, 2026 |
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What this means
- Connecticut taxes property at 70% of its appraised market value: the assessment $382,970 times the town mill rate gives the yearly tax.
- Derby last revalued in 2025. Towns revalue every five years; between two revaluations the appraisal stays the same even if the market moves.
- Assessed 80% above the median for this use in Derby ($213,150, 3,886 parcels).
- The last sale price is 0% below the appraisal.
Point at the centre of the parcel — not a survey.
Data: Connecticut CAMA and Parcel Layer (2026 collection, CC0), retrieved October 31, 2026. Sources and freshness. No owner names are published.
The report for 21 Clark St Ext
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)
Order the report