421 Classon Avenue at a glance
421 Classon Avenue, Brooklyn has 23 open city records on file, 1 of them Class C (immediately hazardous), and $300.00 recorded as due on OATH/ECB summonses. No marshal evictions are on record for this building. The most recent record is dated May 4, 2026.
Open Class C
1
Immediately hazardous — click to see them
Open Class B
10
Hazardous — click to see them
Open Class A
12
Non-hazardous — click to see them
Fines due
$300.00
Balance on OATH/ECB summonses
Open per unit
5.33
6 residential units · NYC average 0.38
Evictions
0
No marshal evictions on record
Permits on file
5
Construction permits filed with DOB
Last activity
May 4, 2026
HPD record
Health score for 421 Classon Avenue
A composite of the public indicators below. How it is scored.
Record timeline for 421 Classon Avenue
77 records on file, every agency interleaved. Class A, B and C are HPD’s hazard tiers: C is immediately hazardous, A and B explained here.
OATH / ECB summonses & fines at 421 Classon Avenue
$300.00 is recorded as due across the 11 summonses below, out of $1,330.00 in penalties imposed. Balances are as the city publishes them; a settlement or write-off that never reached the dataset will not show here. New to these? How an OATH summons becomes a penalty, explained.