Permit Record

Mechanical Systems

8410 20 Avenue, Brooklyn, NY 11214

ClassificationHVAC / Mechanical
Reliable value$10,000
ContractorA7 Construction Service L →
Permit record
Parties
Contractor
A7 Construction Service L
Applicant
Dong Ming Xu
Owner
Pr
Architect
Not in source
Engineer
Not in source
Contractor license
621047
Building & lot · PLUTO
Building class
S2
Zoning district
R5
Lot area
1,900 sq ft
Year built
1925
Units (total)
3
Units (residential)
2
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
3063330040
Climate zone (IECC)
4A
Roof area (est.)
867 sq ft
HVAC tonnage (est.)
6 tons
Building type
R
Building subtype
Not in source
Geocode & dates
Coordinates
40.6056, -73.9972
Geocode confidence
95%
Geocode source
Not in source
Issued
Apr 13, 2023
Applied
Not in source
Work class
Not in source
Description
Source description

MECHANICAL WORK ON 1ST FLOOR. NO CHANGE IN USE GROUP, EGRESS AND OCCUPANCY.

Status
Current status
finaled
Source status
Signed-off
Finaled
Apr 10, 2023
Expired
Jul 21, 2023
Provenance
First seen by PermitCore
May 2, 2026 · 09:33 UTC
Last seen
May 11, 2026 · 23:56 UTC
Last changed
May 2, 2026 · 09:33 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

5 permits at this parcel (parcel 3063330040) · Dec 21, 2022 – Apr 13, 2023

  1. Apr 13, 2023This permitMEP Mechanical HVAC · Finaled$10,000A7 Construction Service L
  2. Mar 27, 2023605039861Alteration Commercial · Finaled$2,000A7 Construction Service L
  3. Dec 21, 2022715832948Alteration Commercial · Finaled$10,000A7 Construction Service L
  4. Date not in sourcelegacy_jobs:2154147Alteration Commercial · Pending$23,640
  5. Date not in source3931198Other · Pending

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

Other permits by A7 Construction Service L

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Developer details
Permit #
216457440|Mechanical Systems
Canonical ID
1:216457440|Mechanical Systems
Source permit ID
216457440|Mechanical Systems
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