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One family attached or semi-detached
10521 AVENUE K
BROOKLYN · BIN 3231515
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1965Year Built
2Stories
A5Building Class
R5Zoning
1,552 sfGross Floor Area
1Units
One family attached or semi-detached · 2,000 sf lot · 0.78 FAR built · Flood zone X500
Locations of Work
Electrical
Permit Issued — active, not yet Signed-off
RoofUnder Construction1 filing · 6 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
07/14/2015$430K—Private party → Private party$277/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
SQUARE ARCH, LLC112/16/2025
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
SUSTAINABLE STRATEGIESGeneral Contractor104/09/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
SQ. ARCH, LLC4802112/16/2025
Building Lifecycle
All (7)Filed (1)Permit Issued (1)Special Inspection (5)
12/16/2025
Filed — Alteration
B01334906-I1
12/16/2025
Permit issued — Solar
B01334906-I1-SL
12/16/2025
Special inspection requirement — Post-installed Anchors
Chun Feng
12/16/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
Chun Feng
12/16/2025
Special inspection requirement — Energy Code Compliance Inspections
Chun Feng
12/16/2025
Special inspection requirement — Final
Chun Feng
12/16/2025
Special inspection requirement — Air barrier - visual inspection
Chun Feng
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWSolarPermit IssuedSUSTAINABLE STRATEGIES12/16/2025
2 projects · most recent 08/26/2026
FiledStatusContractorScope
08/26/2026Permit IssuedSOURCE ELECTRIC INC1 meters
03/23/2026Permit IssuedSOURCE ELECTRIC INC1 meters
▾Special Inspection Requirements (DOB NOW) — 5
DateRequirementInspectorRole
12/16/2025Post-installed AnchorsChun Fengspecial
12/16/2025Fire-Resistant Penetrations and JointsChun Fengspecial
12/16/2025Energy Code Compliance InspectionsChun Fengprogress
12/16/2025FinalChun Fengprogress
12/16/2025Air barrier - visual inspectionChun Fengenergy_progress
▾Documents — 6 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
08/19/2026B01334906-I1Request digital key ↗
▸Seals & Professional Certifications4
▸DOB NOWProgress Inspector Seal & Signature2
09/04/2026B01334906-I1Open ↗
09/04/2026B01334906-I1Open ↗
▸DOB NOWDPL-1: Design Professional Seal & Signature1
08/13/2026B01334906-I1Open ↗
▸DOB NOWSpecial Inspector Seal & Signature1
09/04/2026B01334906-I1Open ↗
▸Environmental & Asbestos1
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
08/13/2026B01334906-I1Open ↗