9 Union St
Boston, MA 02135
5 bd 3 ba 2,431 sqft Built 1885 Lot 6,120 sqft multi_family
Most recent sale
$1,000,000
Mar 18, 2022
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Mar 18, 2022 | Sold | $1,000,000 | MLS #72925143 |
| Jan 5, 2022 | Relisted | $998,000 | MLS #72925143 |
| Dec 24, 2021 | Listing removed | $1,100,000 | MLSPIN |
| Dec 10, 2021 | Price changed | $1,100,000 | MLS #72925143 |
| Dec 3, 2021 | Listed | $1,175,000 | MLS #72925143 |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $656,100 | $355,200 | $1,011,300 | $11,711 |
| 2024 | $661,700 | $326,600 | $988,300 | $10,772 |
| 2023 | $634,500 | $326,600 | $961,100 | $10,322 |
| 2022 | $634,500 | $326,600 | $961,100 | $10,457 |
| 2021 | $616,000 | $317,100 | $933,100 | $9,956 |
| 2020 | $615,000 | $303,500 | $918,500 | $9,699 |
| 2019 | $631,100 | $227,500 | $858,600 | $9,050 |
| 2018 | $582,200 | $227,500 | $809,700 | $8,486 |
| 2017 | $543,600 | $227,500 | $771,100 | $8,166 |
| 2016 | $461,000 | $227,500 | $688,500 | $7,574 |
| 2015 | $351,800 | $230,800 | $582,600 | $7,055 |
| 2014 | $264,200 | $230,800 | $495,000 | $6,227 |
| 2006 | $349,500 | $145,900 | $495,400 | $5,509 |
| 2005 | $342,000 | $145,900 | $487,900 | $5,235 |
| 2004 | $301,700 | $145,900 | $447,600 | $4,543 |
Property facts
Year built
1885
Property type
multi_family
Stories
3
Beds
5
Baths
3
Living area
2,431 sqft
Lot size
6,120 sqft
ZIP code
02135
City
Boston
Street
Union St
Coordinates
42.34522, -71.14773
Comparable properties nearby
Investment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$7,050
Gross rental yield
8.46%
Implied cap rate
5.50%
Trend-extrapolated value
—
Frequently asked questions
When did 9 Union St last sell?
9 Union St most recently sold on Mar 18, 2022 for $1,000,000.
What is the current tax assessment for 9 Union St?
The most recent total assessment for 9 Union St (year 2025) is $1,011,300 with $11,711 in property tax.
How does 9 Union St's assessment compare to its last sale price?
The current assessment is 1.1% above the last sale price of $1,000,000.
When was 9 Union St built?
9 Union St was built in 1885.
How does 9 Union St compare to others on Union St?
We track 6 other properties on Union St. Browse the list under "Other properties on Union St" to compare beds, baths, and sale history.
What are the property facts for 9 Union St?
9 Union St is a 5 bed, 3 bath, 2,431 sqft, 6,120 sqft lot multi_family.
Is 9 Union St a flip candidate?
No — 9 Union St does not appear in our flips dataset.
Is 9 Union St a tax-appeal candidate?
No — 9 Union St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.0%
Implied 1-yr
+3.9%
2026 Q3
$768.9K
2026 Q4
$775.9K
ZIP 02135 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St