345 Commonwealth Ave
Back Bay, Boston · 345 Commonwealth Ave
345 Commonwealth Ave in Back Bay, Boston has 18 recorded condominium sales dating back to 2002, a median sale price of $880K and an average of $888 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
345 Commonwealth Ave is one of 430 condo buildings CURVE covers in Back Bay, where the median recorded price is $769 per square foot. By that measure it ranks #168 of 427 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 345 Commonwealth Ave, by year, with that year's median price.
Sales by price point
How 18 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 |
|---|---|---|---|---|---|---|
| 7 | 5/26/2026 | 2 Beds | Resale 1 | $1.2M | $1,118 | +56% |
| 3 | 8/7/2025 | 2 Beds | Developer Sale | $1.1M | $1,043 | — |
| 10 | 4/30/2024 | 2 Beds | Resale 3 | $2.0M | $1,778 | +5% |
| 10 | 7/12/2022 | 2 Beds | Resale 2 | $1.9M | $1,689 | +25% |
| 8 | 1/13/2020 | 2 Beds | Resale 3 | $1.0M | $898 | +32% |
| 1 | 3/29/2019 | 2 Beds | Developer Sale | $999K | $906 | — |
| 2 | 5/22/2018 | 2 Beds | Developer Sale | $970K | $862 | — |
| 10 | 12/8/2017 | 2 Beds | Resale 1 | $1.5M | $1,356 | +98% |
| 4 | 6/15/2016 | 2 Beds | Resale 1 | $1.1M | $944 | +60% |
| 1-A | 6/11/2015 | 2 Beds | Resale 1 | $545K | $798 | +118% |
The full 345 Commonwealth Ave 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 345 Commonwealth Ave?
18 recorded sales, going back to 2002, of which 9 are resales. This page shows the 10 most recent; members see all of them.
What has 345 Commonwealth Ave done over time?
Resales in the building have changed hands at an average of +48.6% against their prior recorded price, after an average hold of 7.0 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.