10 Prospect Avenue, Darien — property record card
Single family built in 1875, 5 bed, 4.5 bath, 5,338 ft² in Darien, appraised at $2,487,000 (assessed $1,740,900); last sold for $3,616,000 on January 7, 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 Darien assessor’s office.
Parcel
| Location | 10 Prospect Avenue, Darien CT 06820 |
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| Parcel ID | 15-003-00 |
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| CAMA account | 18850-04793 |
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| Use | Single family (state use code 101) |
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| Zone | R12 |
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| Planning region | Western Connecticut |
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Valuation — revaluation 2023
| Appraised (market value) | $2,487,000
land $983,900 · building $1,503,100 |
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| Assessed (70%) | $1,740,900
land $688,730 |
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Land
| Lot size | 1.00 acres (43,560 ft²) |
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Building
| Year built | 1875 |
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| Living area | 5,338 ft² |
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| Rooms | 10 |
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| Bedrooms | 5 |
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| Bathrooms | 4 full, 2 half |
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| Condition | very good |
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Sales
| Last sale | $3,616,000 — January 7, 2026 |
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What this means
- Connecticut taxes property at 70% of its appraised market value: the assessment $1,740,900 times the town mill rate gives the yearly tax.
- Darien last revalued in 2023. Towns revalue every five years; between two revaluations the appraisal stays the same even if the market moves.
- Assessed 43% above the median for this use in Darien ($1,216,880, 6,138 parcels).
- The last sale price is 45% above the appraisal.
- Built before 1978: lead paint may be present; Connecticut law requires disclosure to a buyer or tenant.
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 10 Prospect Avenue
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