81 Waltham Street Condominium
South End, Boston · 81 Waltham ST
81 Waltham Street Condominium in South End, Boston has 15 recorded condominium sales dating back to 2000, a median sale price of $650K and an average of $892 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
81 Waltham Street Condominium is one of 389 condo buildings CURVE covers in South End, where the median recorded price is $711 per square foot. By that measure it ranks #78 of 388 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 81 Waltham Street Condominium, by year, with that year's median price.
Sales by price point
How 15 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 |
|---|---|---|---|---|---|---|
| 6 | 11/18/2025 | 2 Beds | Resale 3 | $1.3M | $1,513 | +28% |
| 4 | 11/23/2021 | 1 Bed | Resale 2 | $823K | $1,200 | +12% |
| 2 | 8/10/2021 | 1 Bed | Developer Sale | $650K | $970 | — |
| 3 | 6/24/2021 | 2 Beds | Resale 3 | $930K | $1,374 | +13% |
| 6 | 3/2/2021 | 2 Beds | Resale 2 | $980K | $1,186 | +27% |
| 4 | 2/7/2019 | 1 Bed | Resale 1 | $735K | $1,071 | +90% |
| 3 | 10/30/2017 | 2 Beds | Resale 2 | $820K | $1,211 | +113% |
| 1 | 3/31/2016 | 1 Bed | Resale 1 | $548K | $747 | +69% |
| 6 | 5/8/2015 | 2 Beds | Resale 1 | $773K | $936 | +39% |
| 6 | 9/1/2011 | 2 Beds | Developer Sale | $556K | $673 | — |
The full 81 Waltham Street Condominium 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 81 Waltham Street Condominium?
15 recorded sales, going back to 2000, of which 9 are resales. This page shows the 10 most recent; members see all of them.
What has 81 Waltham Street Condominium done over time?
Resales in the building have changed hands at an average of +46.8% against their prior recorded price, after an average hold of 6.6 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.