Permit Record

Mechanical Systems

3924 Avenue K, Brooklyn, NY 11210

ClassificationHVAC / Mechanical
Reliable value$1,500
ContractorM&r Improvements CORP →
Permit record
Parties
Contractor
M&r Improvements CORP
Applicant
Ronald J Mayronne
Owner
Pr
Architect
Not in source
Engineer
Not in source
Contractor license
606578
Building & lot · PLUTO
Building class
A1
Zoning district
R5
Lot area
2,635 sq ft
Year built
1930
Units (total)
1
Units (residential)
1
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
3078090023
Climate zone (IECC)
4A
Roof area (est.)
820 sq ft
HVAC tonnage (est.)
2.5 tons
Building type
R
Building subtype
Not in source
Geocode & dates
Coordinates
40.6257, -73.9376
Geocode confidence
95%
Geocode source
Not in source
Issued
Apr 2, 2025
Applied
Not in source
Work class
Not in source
Description
Source description

NEW EXHAUST FAN AT CELLAR LEVEL. GC APPROVED B01075603.

Status
Current status
finaled
Source status
Signed-off
Finaled
Mar 24, 2025
Expired
Sep 18, 2025
Provenance
First seen by PermitCore
May 2, 2026 · 10:11 UTC
Last seen
May 12, 2026 · 00:14 UTC
Last changed
May 2, 2026 · 10:11 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

9 permits at this parcel (parcel 3078090023) · Sep 15, 2009 – Apr 2, 2025

  1. Apr 2, 2025This permitMEP Mechanical HVAC · Finaled$1,500M&r Improvements CORP
  2. Aug 29, 2024335140726Alteration Commercial · Finaled$1,500M&r Improvements CORP
  3. Apr 18, 20173353300MEP Plumbing · IssuedDavid Jablon
  4. Apr 7, 20173348050MEP Mechanical HVAC · IssuedM. Marin Restoration INC
  5. Apr 7, 20173343281Other · IssuedM. Marin Restoration INC
  6. Mar 22, 20102228723MEP Plumbing · IssuedDavid Jablon
  7. Mar 22, 2010legacy_jobs:1751523Alteration Residential · Finaled$32,000
  8. Sep 15, 20092160593Other · IssuedM. Marin Restoration INC
  9. Sep 15, 20092161742MEP Mechanical HVAC · IssuedM. Marin Restoration INC

Full permit history at this parcel · as of Aug 4, 2026.

Other permits by M&r Improvements CORP

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Developer details
Permit #
961471131|Mechanical Systems
Canonical ID
1:961471131|Mechanical Systems
Source permit ID
961471131|Mechanical Systems
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