31 Mercer
South Boston, Boston · 31 Mercer St
31 Mercer in South Boston, Boston has 5 recorded condominium sales dating back to 2023, a median sale price of $900K and an average of $778 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
31 Mercer is one of 1,024 condo buildings CURVE covers in South Boston, where the median recorded price is $510 per square foot. By that measure it ranks #74 of 1024 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 31 Mercer, by year, with that year's median price.
Sales by price point
How 5 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
5 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| 2 | 7/2/2026 | 2 Beds | Resale 1 | $825K | $876 | +7% |
| 1 | 8/1/2025 | 3 Beds | Resale 1 | $1.1M | $661 | -6% |
| 1 | 3/1/2024 | 3 Beds | Developer Sale | $1.1M | $701 | — |
| 2 | 10/31/2023 | 2 Beds | Developer Sale | $770K | $817 | — |
| 3 | 10/2/2023 | 2 Beds | Developer Sale | $900K | $836 | — |
The full 31 Mercer 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 31 Mercer?
5 recorded sales, going back to 2023, of which 2 are resales. This page shows the 5 most recent; members see all of them.
What has 31 Mercer done over time?
Resales in the building have changed hands at an average of +0.7% against their prior recorded price, after an average hold of 2.0 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.