306 Union St
Brooklyn, NY 11231
— ba 4,620 sqft Built 1920 Lot 2,200 sqft multi_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $1,057,050 | $342,000 | $1,399,050 | $12,785 |
| 2024 | $1,057,050 | $342,000 | $1,399,050 | $11,957 |
| 2023 | $629,550 | $342,000 | $971,550 | $10,863 |
| 2022 | $467,550 | $342,000 | $809,550 | $10,029 |
| 2021 | $305,550 | $342,000 | $647,550 | $10,050 |
| 2020 | $286,650 | $342,000 | $628,650 | $8,012 |
| 2019 | $181,800 | $342,000 | $523,800 | $8,985 |
| 2018 | $14,748 | $53,375 | $68,123 | $8,295 |
| 2017 | $4,758 | $58,320 | $63,078 | $7,803 |
| 2016 | $981 | $62,097 | $63,078 | $7,827 |
| 2015 | $12,984 | $48,136 | $61,120 | $7,571 |
| 2014 | $20,930 | $35,664 | $56,594 | $6,973 |
| 2013 | $16,329 | $36,074 | $52,403 | $4,939 |
| 2012 | $8,439 | $40,083 | $48,522 | $6,226 |
| 2010 | $12,226 | $36,296 | $48,522 | $5,948 |
| 2009 | $21,123 | $25,893 | $47,016 | $5,528 |
| 2007 | $26,128 | $11,197 | $37,325 | $4,267 |
Property facts
Year built
1920
Property type
multi_family
Stories
3
Beds
—
Baths
—
Living area
4,620 sqft
Lot size
2,200 sqft
ZIP code
11231
City
Brooklyn
Street
Union St
Coordinates
40.68188, -73.99522
Comparable properties nearby
Frequently asked questions
When did 306 Union St last sell?
No public-record sale is on file for 306 Union St.
What is the current tax assessment for 306 Union St?
The most recent total assessment for 306 Union St (year 2025) is $1,399,050 with $12,785 in property tax.
When was 306 Union St built?
306 Union St was built in 1920.
How does 306 Union St compare to others on Union St?
We track 8 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 306 Union St?
306 Union St is a — bath, 4,620 sqft, 2,200 sqft lot multi_family.
Is 306 Union St a flip candidate?
No — 306 Union St does not appear in our flips dataset.
Is 306 Union St a tax-appeal candidate?
No — 306 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
+3.5%
Implied 1-yr
+14.1%
2026 Q2
$3.02M
2026 Q3
$3.11M
ZIP 11231 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St