621 East First
South Boston, Boston · 621 E First St
621 East First in South Boston, Boston has 40 recorded condominium sales dating back to 2017, a median sale price of $1.4M and an average of $728 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
621 East First 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 #110 of 1024 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 621 East First, by year, with that year's median price.
Sales by price point
How 40 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 |
|---|---|---|---|---|---|---|
| A7 | 9/30/2025 | 1 Bed | Resale 1 | $232K | $347 | +29% |
| B5 | 6/6/2025 | 3 Beds | Resale 2 | $1.5M | $775 | +1% |
| C6 | 9/27/2024 | 2 Beds | Resale 1 | $1.5M | $835 | +26% |
| B6 | 6/7/2024 | 2 Beds | Resale 1 | $1.6M | $840 | +14% |
| D6 | 6/5/2024 | 2 Beds | Resale 1 | $1.6M | $889 | +12% |
| C1 | 5/1/2024 | 3 Beds | Resale 2 | $1.9M | $929 | +10% |
| C3 | 1/9/2023 | 2 Beds | Resale 1 | $1.2M | $726 | -9% |
| D5 | 9/27/2022 | 3 Beds | Resale 2 | $1.9M | $1,006 | +11% |
| B5 | 1/31/2022 | 3 Beds | Resale 1 | $1.5M | $767 | +9% |
| A3 | 11/23/2021 | 3 Beds | Resale 1 | $1.9M | $897 | +29% |
The full 621 East First 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 621 East First?
40 recorded sales, going back to 2017, of which 12 are resales. This page shows the 10 most recent; members see all of them.
What has 621 East First done over time?
Resales in the building have changed hands at an average of +12.1% against their prior recorded price, after an average hold of 4.6 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.