Permit Record

Mechanical Systems

677 Jefferson Avenue, Brooklyn, NY 11221

ClassificationMechanical SystemsMultifamily Alteration
Reliable value$30,000
ContractorGc Leader Construction CO →
Permit record
Parties
Contractor
Gc Leader Construction CO
Applicant
Grzegorz Czyzewski
Owner
Pr
Architect
Not in source
Engineer
Not in source
Contractor license
616553
Building & lot · PLUTO
Building class
B3
Zoning district
R6B
Lot area
2,000 sq ft
Year built
1899
Units (total)
2
Units (residential)
2
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
3016510060
Climate zone (IECC)
4A
Roof area (est.)
1,410 sq ft
HVAC tonnage (est.)
4.5 tons
Building type
R
Building subtype
Not in source
Geocode & dates
Coordinates
40.6855, -73.9311
Geocode confidence
95%
Geocode source
Not in source
Issued
Mar 14, 2024
Applied
Not in source
Work class
Residential
Description
Source description

REPLACEMENT OF (1) EXISTING GAS FURNACE AND INSTALLATION OF (1) NEW HVAC SYSTEM FOR UPPER LEVEL APARTMENT - IN CONJUNECTION WITH THE GENERAL RENOVATION WORKS PROPOSED UNDER FILING B00816610-I1

Status
Current status
finaled
Source status
Signed-off
Finaled
Aug 22, 2023
Expired
Sep 18, 2024
Provenance
First seen by PermitCore
May 2, 2026 · 09:51 UTC
Last seen
May 12, 2026 · 00:05 UTC
Last changed
May 12, 2026 · 00:05 UTC

Open in New York City source →

Data-quality checks0 of 12 flagged

0 of 12 data-quality rules flagged anything on this permit.

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
  • Residential units is placeholder
  • Total units out of bounds
  • Total units is placeholder
  • Valuation out of bounds
  • Valuation is placeholder
Project timeline at this parcel

4 permits at this parcel (parcel 3016510060) · Sep 15, 2023 – Mar 14, 2024

  1. Mar 14, 2024This permitAlteration Residential · Finaled$30,000Gc Leader Construction CO
  2. Oct 17, 2023767580787MEP Plumbing · Finaled$105,000Superb Plumbing & Heating
  3. Sep 15, 2023258530444Alteration Commercial · Finaled$480,000Gc Leader Construction CO
  4. Sep 15, 2023258530444Alteration Commercial · Finaled$480,000Gc Leader Construction CO

Full permit history at this parcel · as of Jul 9, 2026.

Other permits by Gc Leader Construction CO

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Developer details
Permit #
557190985|Mechanical Systems
Canonical ID
1:557190985|Mechanical Systems
Source permit ID
557190985|Mechanical Systems
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