Watertown Condo Building
10 Williams St Watertown Condos: Sale Prices & History
10 Williams St is a 74-unit condo community in Watertown. 19 units have recorded sales in the last five years, with a median sale price of $417,000 over the last 24 months. The most recent recorded sale closed on June 8, 2026. The unit-level history below is the honest starting point for what any unit here is worth.
Source: Watertown assessor & registry of deeds records, through June 12, 2026. Family transfers and other non-market sales are excluded.
Building snapshot
- Units in building
- 74
- Sales, last 5 years
- 19
- Median price, last 24 mo
- $417,000
- Latest recorded sale
- June 8, 2026
Last 10 recorded sales at 10 Williams St
| Sold | Unit | Beds | Baths | Size | Price |
|---|---|---|---|---|---|
| June 8, 2026 | 23 | 2 | 2 | 1,080 sq ft | $425,000 |
| April 15, 2026 | 46 | 2 | 2 | 1,080 sq ft | $318,500 |
| April 8, 2026 | 26 | 2 | 2 | 1,080 sq ft | $459,000 |
| January 29, 2026 | 39 | 2 | 1 | 950 sq ft | $409,000 |
| December 31, 2025 | 56 | 2 | 2 | 1,080 sq ft | $461,800 |
| August 29, 2025 | 82 | 1 | 1 | 735 sq ft | $250,000 |
| July 3, 2025 | 79 | 2 | 1 | 950 sq ft | $450,000 |
| June 12, 2025 | 77 | 1 | 1 | 670 sq ft | $390,000 |
| September 24, 2024 | 83 | 2 | 2 | 1,080 sq ft | $590,000 |
| September 13, 2024 | 78 | 1 | 1 | 670 sq ft | $395,200 |
Source: Watertown assessor & registry of deeds records, through June 12, 2026. Family transfers and other non-market sales are excluded.
Median sale price by year
| Year | Sales | Median price |
|---|---|---|
| 2026 | 4 | $417,000 |
| 2025 | 4 | $420,000 |
| 2024 | 4 | $461,100 |
| 2023 | 2 | $475,000 |
| 2022 | 3 | $410,000 |
| 2021 | 4 | $405,000 |
| 2020 | 4 | $489,500 |
| 2019 | 6 | $373,750 |
| 2018 | 8 | $425,000 |
| 2017 | 4 | $317,500 |
| 2016 | 2 | $386,500 |
| 2015 | 2 | $308,250 |
| 2014 | 5 | $327,500 |
| 2013 | 3 | $282,500 |
| 2012 | 4 | $238,950 |
Years with recorded sales, most recent 15 shown. Medians in low-volume years reflect only a handful of sales — unit mix matters.
Pricing a unit at 10 Williams St
In a building like this, the comps that matter are the ones upstairs and down the hall — not the town-wide condo median. With 74 units and 19 sales in five years, there's usually a recent in-building comp to anchor from, and the differences from there come down to floor, exposure, parking, and condition.
If you own here, the table above is the raw material. A proper valuation adjusts each of those sales for how your unit compares — which is exactly what I do in a free value report, built from this building's actual closed sales.
Own a unit at 10 Williams St?
I'll build your valuation from this building's actual recorded sales — adjusted for floor, parking, and condition — and send it over free, with no pressure to list.