155 W Ninth St
South Boston, Boston · 155 W Ninth St
155 W Ninth St in South Boston, Boston has 4 recorded condominium sales dating back to 2012, a median sale price of $599K and an average of $482 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
155 W Ninth St 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 #703 of 1024 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 155 W Ninth St, by year, with that year's median price.
Sales by price point
How 4 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
4 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| 1 | 7/7/2026 | 2 Beds | Resale 1 | $900K | $479 | +92% |
| 2 | 6/8/2026 | 1 Bed | Resale 1 | $730K | $789 | +92% |
| 1 | 1/17/2014 | 2 Beds | Developer Sale | $469K | $249 | — |
| 2 | 9/28/2012 | 1 Bed | Developer Sale | $380K | $411 | — |
The full 155 W Ninth St 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 155 W Ninth St?
4 recorded sales, going back to 2012, of which 2 are resales. This page shows the 4 most recent; members see all of them.
What has 155 W Ninth St done over time?
Resales in the building have changed hands at an average of +92.1% against their prior recorded price, after an average hold of 13.1 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.