Permit Record

Mechanical Systems

421 Knickerbocker Avenue, Brooklyn, NY 11237

ClassificationMechanical SystemsCommercial HVAC
Reliable value$42,000
ContractorKl Hvac INC →
Permit record
Parties
Contractor
Kl Hvac INC
Applicant
Kenneth Lee
Owner
J&j Pitkin Realty
Architect
Not in source
Engineer
Not in source
Contractor license
624232
Building & lot · PLUTO
Building class
K4
Zoning district
C4-3
Lot area
2,500 sq ft
Year built
1931
Units (total)
1
Units (residential)
0
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
3032790004
Climate zone (IECC)
4A
Roof area (est.)
5,350 sq ft
HVAC tonnage (est.)
13.5 tons
Building type
M
Building subtype
Not in source
Geocode & dates
Coordinates
40.6996, -73.9197
Geocode confidence
95%
Geocode source
Not in source
Issued
Jun 7, 2024
Applied
Not in source
Work class
Not in source
Description
Source description

MECHANICAL WORK(REPLACEMENT OF HVAC ROOF TOP UNIT).**NO CHANGE IN USE, OCCUPANCY, OR EGRESS IS INVOLVED UNDER THIS APPLICATION**

Status
Current status
finaled
Source status
Signed-off
Finaled
Jun 5, 2024
Expired
May 1, 2025
Provenance
First seen by PermitCore
May 2, 2026 · 10:06 UTC
Last seen
May 12, 2026 · 00:12 UTC
Last changed
May 2, 2026 · 10:06 UTC

Open in New York City source →

Data-quality checks1 of 12 flagged

1 of 12 data-quality checks flagged on this permit. Detail below.

Residential units is placeholder
units_residential_is_placeholder

units_residential matched a known placeholder value used by the source when the field wasn't reported.

Checks not flagged

  • Geocode out of bounds
  • Geocode is sentinel
  • Issued date in the future
  • Issued date parse bug
  • Issued date is placeholder
  • Commercial units is placeholder
  • Residential units out of bounds
  • Total units out of bounds
  • Total units is placeholder
  • Valuation out of bounds
  • Valuation is placeholder
Project timeline at this parcel

13 permits at this parcel (parcel 3032790004) · through Jun 7, 2024

  1. Jun 7, 2024This permitMEP Mechanical HVAC · Finaled$42,000Kl Hvac INC
  2. Jan 30, 2002legacy_jobs:939496Alteration Commercial · Finaled$20,000
  3. Jan 30, 2002227715MEP Mechanical HVAC · IssuedTemp East INC
  4. Jul 24, 2000862300Alteration Commercial · IssuedDependable Sprinkler CORP
  5. Jul 24, 2000legacy_jobs:900928Alteration Commercial · Finaled$12,000
  6. Jul 24, 2000legacy_jobs:900937Alteration Commercial · Finaled$12,000
  7. Jul 24, 2000legacy_jobs:867151Alteration Commercial · Finaled$12,000
  8. Jul 12, 2000515855MEP Plumbing · IssuedTheodore Wagner Plbg & Htg CORP
  9. May 31, 200046844Alteration Commercial · IssuedPerferred Housing CORP
  10. Feb 7, 20001288044Construction Equipment · IssuedSpring Scaffolding INC
  11. Feb 7, 2000legacy_jobs:896590Alteration Residential · Finaled
  12. Feb 7, 2000legacy_jobs:862984Alteration Residential · Finaled
  13. Date not usable in source1253894Alteration Commercial · IssuedPerferred Housing CORP

Full permit history at this parcel · as of Jul 19, 2026.

Other permits by Kl Hvac INC

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Developer details
Permit #
856289870|Mechanical Systems
Canonical ID
1:856289870|Mechanical Systems
Source permit ID
856289870|Mechanical Systems
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