RealtyLens
for saleRealtyLens property overview
$4,500,000

819 Union St

Brooklyn, NY, 11215
View more Brooklyn, NY property pages
6Beds
4Baths
3,580Sqft
$1257$/sqft

Listing Notes

Welcome to this charming three-family brownstone, ideally situated in the highly sought-after Park Slope neighborhood of Brooklyn, NY 11215. This beautifully renovated 4-story brownstone boasts three spacious apartments, making it a perfect investment opportunity or a lovely residence for an owner-occupant. Property Features: - Units: The property consists of three well-appointed apartments: - Owner's Unit: The first and second floors are combined into one expansive unit; this was the owner's unit. The owner is moving out as I type this information. - The third floor is vacant at this time. This unit has two bedrooms, a full bath with a shower, a living room, and a kitchen. This unit has been updated. - The fourth floor is tenant-Occupied Units: The fourth floor unit is on the fourth floor, occupied by excellent tenants on a year-to-year lease. - Renovations: The entire property has been thoughtfully renovated inside and out, ensuring modern amenities while maintaining the classic charm of a brownstone. - Location: Nestled in the heart of Brooklyn, this home offers unparalleled access to local attractions: - Just a short distance to the Barclays Center. - Surrounded by a variety of shopping and dining options. - Convenient access to public transportation: - minutes to the following stations -R train at Union St station. - B & Q trains at 7th Avenue station. - 2 & 3 trains at Grand Army Plaza station. - Atlantic Ave-Barclays Center station for additional B & Q train access. Viewing Information: Just so you know, the fourth floor is currently occupied, and viewings can only be scheduled by appointment. The home is being sold as-is, with no warranties or representations. You are getting three floors vacant out of four floors. This is a rare opportunity to invest in a prime location in Park Slope, Brooklyn. Don't miss your chance to own a piece of this vibrant neighborhood!

Market Insights

Near nearby median+0.4%

$1257/sqft vs a nearby median of $1252/sqft.

Nearby median$1252/sqft
Nearby properties12
Property size3,580 sqft
  • +0.4% versus the nearby median price per square foot.
  • Price history is limited, so current comps matter more than trend alone.
  • 3,580 sqft creates a usable price-per-square-foot read.

Pricing Read

Yardstick fair value$4.48M$4.08M$4.88M · 50% confidence
vs ask $4.50M+$20k (+0.4%)

Asking price is well-anchored to the comp picture (+0.4%). Negotiate on terms, not headline price.

$1,252/sqft median across 8 tight comps × 3,580 sqft= $4.48M
  • Days-on-market gravity−$134k −3.0%
  • Transit access+$112k +2.5%
  • Pre-war character+$112k +2.5%
  • Visible condition issues−$90k −2.0%
Cumulative NYC adjustments+$0+0.0%

Property Read

FreshnessVerification recommended

The page is useful for research, but the status and price should be verified before acting.

Market Position+0.4% vs nearby

The property is close to nearby price-per-square-foot levels, so the decision will likely come down to condition and layout.

Price MovementInitial price point

Price history is still limited; review again as more market activity becomes available.

Diligence Read3 items to check
AI ReadinessReady to analyze
Assistant read

Generate a buyer-agent read of this listing — pricing, risks, comp check, and negotiation leverage. Takes a few seconds.

Generated from the facts shown on this page and nearby market data. Not a professional appraisal.

Listing Details

Days on market
208 days
Last price change
No change recorded
Listed
Oct 16, 2025
Photos
30 photos
Property type
multi family
Status
for sale

Features & Amenities

Hardwood FloorsTwo Or More StoriesRental PropertyInvestment OpportunityViewsDenShopping

Photos

Building Facts

Year built
1901
Stories
3
Total units
3
Residential units
3
Building area
3,580 sqft
Lot size
1,755 sqft
Land use
Multi-family walk-up buildings
Building class
C0

From NYC public records where available.

Price History

May 4, 2026Initial record
$4,500,000for sale

Public Records

DOB violations1 open

1 total recorded against the building

HPD violations1 open

12 total recorded

ACRIS documents4

Tax-lot deed, mortgage, and transfer records on file

311 calls (12 mo)29,787

Top: illegal parking

Top complaint types in ZIP 11215

  • Illegal Parking6,054
  • HEAT/HOT WATER2,144
  • Street Condition1,124
  • Noise - Residential942
  • Snow or Ice941

Recent DOB

  • May 8, 2001V-DOB VIOLATION - ACTIVE · C-CONSTRUCTION OTHER OPTIONAL

Recent HPD

  • May 6, 2026Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...
  • Jun 11, 2025Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...
  • Apr 12, 2024Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...
  • Mar 27, 2023Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...

Recent Transfers (ACRIS)

  • Feb 19, 2026DEED
  • Aug 16, 2000DEED

Sourced from NYC Open Data (DOB, HPD, ACRIS). Updated as the city republishes — check the original source for live status.

You can also find this listing on StreetEasy.

Listing data sourced from streeteasy.com. RealtyLens enriches and contextualises it for you, but the original listing lives on the source.