340 Commonwealth Avenue
Back Bay, Boston · 340 COMMONWEALTH AV
340 Commonwealth Avenue in Back Bay, Boston has 14 recorded condominium sales dating back to 2000, a median sale price of $998K and an average of $922 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
340 Commonwealth Avenue is one of 486 condo buildings CURVE covers in Back Bay, where the median recorded price is $779 per square foot. By that measure it ranks #215 of 483 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 340 Commonwealth Avenue, by year, with that year's median price.
Sales by price point
How 14 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
10 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| 1 | 8/28/2024 | 3 Beds | Resale 3 | $2.9M | $1,506 | +22% |
| 2 | 2/1/2023 | 2 Beds | Resale 2 | $1.6M | $1,276 | +57% |
| 1 | 4/25/2018 | 3 Beds | Resale 2 | $2.4M | $1,233 | +50% |
| 3 | 10/24/2013 | 2 Beds | Resale 3 | $1.2M | $1,007 | +27% |
| 1 | 8/17/2012 | 3 Beds | Resale 1 | $1.6M | $822 | +14% |
| 3 | 7/18/2012 | 2 Beds | Resale 2 | $924K | $792 | +10% |
| 3 | 12/28/2011 | 2 Beds | Resale 1 | $838K | $718 | -6% |
| 2 | 8/23/2007 | 2 Beds | Resale 1 | $985K | $811 | +6% |
| 4 | 5/9/2007 | 3 Beds | Resale 2 | $995K | $853 | +8% |
| 2 | 5/27/2005 | 2 Beds | Developer Sale | $925K | $761 | — |
The full 340 Commonwealth Avenue record
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About this record
Where does this data come from?
Every sale shown is a deed recorded with the Boston registry — the legal record of the transaction, not a listing or an estimate. CURVE assembles, verifies and reconciles each one to the building and the unit.
How many sales are in 340 Commonwealth Avenue?
14 recorded sales, going back to 2000, of which 10 are resales. This page shows the 10 most recent; members see all of them.
What has 340 Commonwealth Avenue done over time?
Resales in the building have changed hands at an average of +18.2% against their prior recorded price, after an average hold of 5.3 years.
What do members see that I don't?
The complete sales table, each unit's full chain of title, buyer and seller names, financing detail, the deed book and page behind every figure, the condo documents, and reports you can send to a client.