3-11 Blackstone St #11/9, Cambridge — property record card
Residential Condominium built in 1999 in Cambridge, assessed at $18,326,500 for fiscal year 2026; last sold for $940,000 on April 1, 2025.
Parcel
| Location | 3-11 Blackstone St #11/9 |
|---|---|
| Map and parcel ID | 129-9 129-9-11/9 |
| Use | Residential Condominium |
| County | Middlesex |
Valuation — fiscal year 2026
| Building | $18,326,500 |
|---|---|
| Land | $0 |
| Total assessed | $18,326,500 |
Building
| Year built | 1999 |
|---|---|
| Style | TOWNHOUSE |
| Living area | 2,486 ft² |
| Rooms | 6 |
| Stories | 3 |
| Units | 15 |
Last recorded sale
| Price | $940,000 |
|---|---|
| Date | April 1, 2025 |
| Deed | Registry of Deeds book 00174, page 0109 |
15 assessor accounts on this parcel
| Address | Account | Use | Assessed | Last sale |
|---|---|---|---|---|
| 3-11 Blackstone St | 129-9 | CONDO-BLDG | $0 | |
| 3-11 Blackstone St #3/1 | 129-9-3/1 | Residential Condominium | $772,600 | $938,000 |
| 3-11 Blackstone St #3/2 | 129-9-3/2 | Residential Condominium | $791,500 | $940,000 |
| 3-11 Blackstone St #3/3 | 129-9-3/3 | Residential Condominium | $1,096,800 | $777,000 |
| 3-11 Blackstone St #3/4 | 129-9-3/4 | Residential Condominium | $1,212,600 | $878,000 |
| 3-11 Blackstone St #11/1 | 129-9-11/1 | Residential Condominium | $955,700 | nominal ($1) |
| 3-11 Blackstone St #11/2 | 129-9-11/2 | Residential Condominium | $652,100 | nominal ($10) |
| 3-11 Blackstone St #11/3 | 129-9-11/3 | Residential Condominium | $1,290,600 | $940,000 |
| 3-11 Blackstone St #11/4 | 129-9-11/4 | Residential Condominium | $1,058,400 | $261,000 |
| 3-11 Blackstone St #11/5 | 129-9-11/5 | Residential Condominium | $1,413,300 | nominal ($0) |
| 3-11 Blackstone St #11/6 | 129-9-11/6 | Residential Condominium | $1,490,000 | nominal ($1) |
| 3-11 Blackstone St #11/7 | 129-9-11/7 | Residential Condominium | $1,363,900 | $579,000 |
| 3-11 Blackstone St #11/8 | 129-9-11/8 | Residential Condominium | $1,443,500 | nominal ($1) |
| 3-11 Blackstone St #11/9 | 129-9-11/9 | Residential Condominium | $2,394,500 | $2,350,000 |
| 3-11 Blackstone St #11/10 | 129-9-11/10 | Residential Condominium | $2,391,000 | $1,340,000 |
What MassDEP has recorded
No tier-classified 21E site and no Activity and Use Limitation is mapped on this parcel.
Within about 500 m (a third of a mile): 7 active tier-classified 21E sites and 4 sites with an Activity and Use Limitation. All MassDEP sites in Cambridge.
What this means
- Assessed 527% above the median residential condominium in Cambridge ($2,924,050, 2,506 parcels).
- The last sale price is 95% below the current assessment. Massachusetts assessments aim at full market value as of January 1 of the year before the fiscal year.
The report for 3-11 Blackstone St #11/9
This page shows the assessor record and the MassDEP sites on the parcel. The report adds what lies around it: FEMA flood zone, wetlands, Zone II and other water supply protection areas, priority habitat, sewer or septic service, protected open space, and every 21E site within half a mile.
$19card · PDF within 24 h · you pay after receiving itSee the sample (PDF)