Coburn House
Back Bay, Boston · 402 Marlborough ST
Coburn House in Back Bay, Boston has 18 recorded condominium sales dating back to 2000, a median sale price of $908K and an average of $953 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
Coburn House is one of 428 condo buildings CURVE covers in Back Bay, where the median recorded price is $769 per square foot. By that measure it ranks #160 of 425 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in Coburn House, 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 |
|---|---|---|---|---|---|---|
| 3 | 7/30/2026 | 1 Bed | Resale 3 | $2.0M | $1,742 | +11% |
| 2 | 5/6/2026 | 2 Beds | Resale 5 | $1.4M | $1,336 | +4% |
| 1 | 10/6/2025 | 1 Bed | Resale 5 | $1.4M | $1,172 | +17% |
| 3 | 9/22/2022 | 1 Bed | Resale 2 | $1.8M | $1,572 | +24% |
| 1 | 5/12/2022 | 1 Bed | Resale 4 | $1.1M | $998 | +25% |
| 4 | 11/3/2020 | 1 Bed | Resale 1 | $1.3M | $1,153 | +97% |
| 3 | 10/30/2019 | 1 Bed | Resale 1 | $1.5M | $1,267 | +75% |
| 2 | 11/10/2017 | 2 Beds | Resale 4 | $1.3M | $1,285 | +46% |
| 1 | 9/7/2017 | 1 Bed | Resale 3 | $920K | $799 | +31% |
| 2 | 6/21/2013 | 2 Beds | Resale 3 | $895K | $879 | +15% |
The full Coburn House 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 Coburn House?
18 recorded sales, going back to 2000, of which 14 are resales. This page shows the 10 most recent; members see all of them.
What has Coburn House done over time?
Resales in the building have changed hands at an average of +28.9% against their prior recorded price, after an average hold of 6.1 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.