Realmo Analytics

Get reports on 50M+ commercial properties in the US. Find and target property leads based on your business goal.

Financial
Distress signals
Property profile

439 21st St Brooklyn, NY 11226

OFF-MARKET
Residential income homes
Property ID
US63-0690664
3,600 SF 0.04 ac lot Built 1965
Last sale Jun 2026 · $923,522
Entity Owned Owner of record is a legal entity (LLC / corporation). ~ Est. High Equity Modeled equity is high. Estimate, not a fact.
Saved · see the list in your Dashboard
Market Trends Soon

Property summary

AI-generated overview

The property is an occupied three-unit building with two residential apartments positioned above a ground-floor medical office. Each residential unit is configured with a living room and dining room combination, three bedrooms, a kitchen, and a full bathroom. The building sits on a lot of approximately 0.044 acres and has an estimated total building area of about 3,600 square feet. It is located approximately five blocks from the Cortelyou Road train station, which provides Q train service, and…

Ownership intelligence

Who controls the opportunity?

Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. In the full report.

Owner contacts

Can we reach the decision maker?

Skip-traced phones and e-mails of the owner. Included with the full report.

Debts

What is owed, to whom, and when it comes due

Recorded lenders, amounts and estimated maturities of the owner's loan book — in the full report.

Property tax · 2024

What does the county charge?
$5k
Tax billed · 2024
Assessed value$311k
Assessed land$138k
Assessed improvement$173k
Effective rate1.75%

Value estimate

· Oct 2026
$340k
$306k – $374k
Submarket $/SF estimate$889k

Realmo valuation models over county records and 12 qualifying comparable sales.

Recently sold

What actually traded nearby?
$166/SF
ZIP average, outlier-cleaned · 94 recorded sales of this use type
Observed band · Q1–Q3$110 – $247
Qualifying comparables12

Cap rate analysis

How does the asset earn?

No income signal is modeled for this parcel yet — the Cap Rates tab runs the workflow.

Zoning insight

What can be built here?
R6A
This district focuses on medium density housing in areas with higher accessibility to transportation and community services, allowing for...
General categoryRESIDENTIAL
JurisdictionKINGS(BROOKLYN)

Location intelligence

Which uses thrive at this corner?
Best fit: Law Firm
Demand heat for this use is drawn on the map · LocInt grid
Demand index
Law Firm185.1
Realty agency158.3
Parking Facility54.5

Location

439 21st St Brooklyn, NY 11226-6003
County assessor Recorded deeds · 13 transfers 12 qualifying comp sales Zoning catalog

Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.

Comparables

3 recorded sales · 17 properties nearby
Recent sales nearby
3 recorded sales in this ZIP, last 8 years
Address Sale price Sold Size
2518 Tilden, Brooklyn, NY 11226-9621 $45,900,000 Oct 2022 86,360 SF
177 Woodruff, Brooklyn, NY 11226-1805 $745,875 Dec 2021 11,200 SF
1024-1026 Flatbush, Brooklyn, NY 11226 $11,175,000 Sep 2020 37,744 SF
Sale prices and dates as our records hold them, one row per building. A deed can cover more of a building than the size shown, so read the price against the size rather than dividing one by the other.
Comparable nearby
6 properties of the same type nearby
Try Rey
Ask anything about this address in plain English.
“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
You own 439 21st St?
List it free. Reach 20,000 daily buyers.
We’ve already pulled the facts. Confirm photos + price and you’re live in 2 minutes.
More about this property
Thanks! Your message was sent.
Error! Your message wasn't sent.
Please enter your name
Please enter email
Please enter the email in the correct format
Please enter phone
Please enter the number in the correct format
Please enter message
Why this one?
Saved
Reason not saved — we won't ask again