What the listing does not show
41 Alton Place
Brooklyn, NY 11210One-family houseLimited records
Listed at $799,999. The listing does not mention what city records show: little on file for this address. That is common for condominiums, and it does not make the building clear. Zoning and the recorded sale dates are on this page.
- Asking
- $799,999
- Beds
- 3 beds
- Baths
- 1.5 baths
- Size
- 1,870 ft²
- Building
- One-family house
- Built
- 1945
- Housing file
- None
- Unused residential floor area
- 1,120 ft²
01 / Findings
What to ask about
City records a buyer can raise and a seller should be ready to explain. A reading of open filings, not a forecast.
- 01The Housing department has no file for this address. That is common for condominiums and small buildings, and it does not mean the building is clear.
- 02No Buildings Department file matched this address.
- 03About 1,120 ft² of unused residential floor area the listing does not mention.
02 / Building
The building
Department of Finance class A9: One-family house.
- Type
- One-family house
- Year built
- 1945
- Floors
- 2
- Units
- 11 residential
- Building area
- 1,870 ft²
- Residential / commercial
- 1,360 / 0 ft²
- Lot
- 2,000 ft²20 × 100 ft
- Assessed value
- $44,400Tax assessment, not market value
- Assessed land
- $10,080
- Tax exemption
- $1,400
03 / Zoning
What the lot allows
Zoned R5. Floor area ratio is how much building the lot can legally hold. Listings rarely spell this out.
Unused residential floor area
1,120ft²
Built at 63% of allowed
Zoning would still allow this much more housing on the lot.
- Commercial FAR allowed
- 0.00
- Community facility FAR
- 2.00
- Affordable housing bonus FAR
- 2.00
- Zoning district
- R5
04 / Checked
What was checked
A zero means the file exists and is clear. A dash means the city has no file for this address, which is not the same thing.
Housing (HPD)
—
no file
Housing records are kept for registered apartment buildings. Condominiums and small buildings are often not in them.
Buildings (DOB)
—
no file
No Buildings Department file matched this address.
Penalties (ECB)
—
no file
Penalties are listed with the Buildings file, which is missing here.
05 / Full report
Not on the listing
How many documents and sales the city has on file for this building.
2 recorded documents · 0 sales of $10,000 or more · Last sale none · Last mortgage none
06 / FAQ
Questions
How many open violations does 41 Alton Place have?
As of Oct 6, 2026, the city has no housing or buildings file matched to 41 Alton Place. That is common for condominiums and small buildings, and it does not mean the building is clear.
What is the zoning of 41 Alton Place?
The lot is zoned R5. The building is built at a floor area ratio of 0.94 against 1.50 allowed for residential use, leaving about 1,120 ft² of unused residential floor area.
Is this property in a flood zone?
No. The lot is not inside a FEMA 100-year flood zone on the 2007 or 2015 maps.
Does a missing city file mean the building is clear?
No. A missing file means the city has no record matched to this address, not that the building has no problems. Condominiums and small buildings often sit outside the housing registry. Ask the seller or the managing agent directly.
Where does this data come from?
Records are combined from NYC DCP PLUTO (tax lot, zoning, FAR); NYC HPD (housing violations and registrations); NYC DOB and ECB (building violations and penalties); NYC ACRIS (recorded deeds, mortgages and satisfactions); Active for-sale listings. PLUTO version 26v2.
Sources
NYC DCP PLUTO (tax lot, zoning, FAR) · NYC HPD (housing violations and registrations) · NYC DOB and ECB (building violations and penalties) · NYC ACRIS (recorded deeds, mortgages and satisfactions) · Active for-sale listings
PLUTO 26v2, refreshed Oct 6, 2026. Written for people buying or selling this property. Not legal, tax, or appraisal advice. Confirm the details with the city before you offer or list.