431 Marlborough Street
Back Bay, Boston · 431 MARLBOROUGH ST
431 Marlborough Street in Back Bay, Boston has 8 recorded condominium sales dating back to 2014, a median sale price of $3.0M and an average of $1,206 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
431 Marlborough Street is one of 474 condo buildings CURVE covers in Back Bay, where the median recorded price is $776 per square foot. By that measure it ranks #56 of 471 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 431 Marlborough Street, by year, with that year's median price.
Sales by price point
How 8 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
8 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| 3 | 3/18/2025 | 3 Beds | Resale 2 | $4.2M | $1,365 | +29% |
| 2 | 7/14/2023 | 2 Beds | Resale 2 | $1.6M | $1,277 | +2% |
| 1 | 2/18/2020 | 3 Beds | Resale 1 | $3.3M | $1,301 | +18% |
| 3 | 3/27/2018 | 3 Beds | Resale 1 | $3.3M | $1,056 | -12% |
| 2 | 2/15/2018 | 2 Beds | Resale 1 | $1.6M | $1,249 | +13% |
| 3 | 4/12/2017 | 3 Beds | Developer Sale | $3.7M | $1,196 | — |
| 1 | 9/8/2014 | 3 Beds | Developer Sale | $2.8M | $1,100 | — |
| 2 | 6/13/2014 | 2 Beds | Developer Sale | $1.4M | $1,108 | — |
The full 431 Marlborough Street record
You are seeing the summary. Members see the deeds.
No credit card required.
More buildings in Back Bay
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 431 Marlborough Street?
8 recorded sales, going back to 2014, of which 5 are resales. This page shows the 8 most recent; members see all of them.
What has 431 Marlborough Street done over time?
Resales in the building have changed hands at an average of +10.2% against their prior recorded price, after an average hold of 4.5 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.