← Back
BuildNYC
Three families
491 3RD STREET
BROOKLYN · Park Slope · BIN 3021023
💬 Discuss this project
1899Year Built
3Stories
C0Building Class
R6BZoning
3,960 sfGross Floor Area
3Units
Rent Stabilized18 Active Violations ▸FDNY Report ↗
Three families · Owner of record: 491 Park Slope · 1,980 sf lot · 2 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbingFire ProtectionGeneral
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Permit Issued — active, not yet Signed-off
RoofProposed Interior Reno @Under Construction5p · 2 filings · 20 docs
Floor 3Proposed Interior Reno @Under Construction45p · 2 filings · 20 docs
Floor 2Proposed Interior Reno @Under Construction45p · 2 filings · 20 docs
Floor 1Proposed Interior Reno @Under Construction45p · 2 filings · 20 docs
CellarProposed Interior Reno @Under Construction36p · 2 filings · 20 docs
BasementProposed Interior Reno @Under Construction36p · 2 filings · 20 docs
Sub-BasementRelocate kitchen, HVAC, plumbing, correct violationsUnder Construction9p · 1 filing · 20 docs
Site & exteriorProposed Interior Reno @Under Construction13p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
491 Park Slope2510/17/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
Urban Associates310/06/2026
Ilya Vilnits210/01/2026
Green Solutions Engineering & Energ205/29/2026
Jose L. Pena, P.E412/05/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
Building803/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Artur KalajGeneral Contractor706/28/2026
Aqueduct MechanicalPlumbing110/17/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
Urban Engineering2575310/06/2026
The Vilnits Group1223510/01/2026
Green Solutions Engineering5478105/27/2026
Building Lifecycle
All (147)Filed (11)Permit Issued (6)Violation (22)Objection (78)Special Inspection (30)
10/16/2026
Permit issued — Sprinklers
B01369934-S4-PL
10/06/2026
Filed — Alteration CO
Footings for rear yard deck.
B01369934-P2
10/06/2026
Special inspection requirement — Masonry
Nizar Khoury
10/06/2026
Special inspection requirement — Structural Steel - Welding
Nizar Khoury
10/06/2026
Special inspection requirement — Post-installed Anchors
Nizar Khoury
10/06/2026
Special inspection requirement — Final
Nizar Khoury
10/06/2026
Special inspection requirement — Structural Wood Frame
Nizar Khoury
10/06/2026
Special inspection requirement — Structural Steel - Details
Nizar Khoury
10/06/2026
Special inspection requirement — Structural Cold-Formed Steel
Nizar Khoury
10/01/2026
Filed — Alteration CO
Footings for rear yard deck.
B01369934-P1
09/25/2026
Special inspection requirement — Fire-Resistance Rated Construction
ILYA VILNITS
09/25/2026
Special inspection requirement — Fenestration areas
ILYA VILNITS
09/25/2026
Special inspection requirement — Air barrier - visual inspection
ILYA VILNITS
09/25/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
ILYA VILNITS
09/25/2026
Special inspection requirement — Metering
ILYA VILNITS
09/25/2026
Special inspection requirement — Fenestration air leakage
ILYA VILNITS
09/25/2026
Special inspection requirement — Lighting in dwelling units
ILYA VILNITS
09/25/2026
Special inspection requirement — Exterior lighting power
ILYA VILNITS
09/25/2026
Special inspection requirement — Energy Code Compliance Inspections
ILYA VILNITS
09/25/2026
Special inspection requirement — Lighting controls
ILYA VILNITS
09/25/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
ILYA VILNITS
06/22/2026
Permit issued — General Construction
B01369934-I1-GC
06/22/2026
Permit issued — Structural
B01369934-S1-ST
06/22/2026
Permit issued — Foundation
B01369934-S2-FO
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/17/2026
Objection resolved — Addressed
06/12/2026
Objection raised — Admin
06/12/2026
Objection raised — Fire_Protection
06/12/2026
Objection raised — Structural
06/12/2026
Objection raised — Structural
06/12/2026
Objection raised — Scope
06/12/2026
Objection raised — Inspections
06/12/2026
Objection raised — Admin
06/11/2026
Objection raised — Other
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
06/08/2026
Objection raised — Other
Latest 60 of 147 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWPlumbingPermit IssuedAqueduct Mechanical10/16/2026
DOB NOWGeneral ConstructionPermit IssuedArtur Kalaj06/22/2026
DOB NOWStructuralPermit IssuedArtur Kalaj06/22/2026
DOB NOWFoundationPermit IssuedArtur Kalaj06/22/2026
DOB NOWGeneral ConstructionPermit IssuedArtur Kalaj02/04/2026
DOB NOWMechanical SystemsPermit IssuedArtur Kalaj02/04/2026
2 projects · most recent 10/06/2026
Heating and Air Conditioning Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
10/06/2026Permit IssuedArtur KalajHeating and Air Conditioning Systems
Heat / Cool
Mitsubishi Electric MXZ-SM36NAMHZ-U1 3 tons · Condensing Unit ×2
MXZ-SM48NAMHZ-U1 4 tons · Condensing Unit ×1
12/05/2025Permit IssuedArtur KalajHeating and Air Conditioning Systems, Ventilation Systems
Heat / Cool
Mitsubishi Electric MODEL #SUZ-AK36NLHZ (SAME FOR ALL 4 UNITS) SERIAL #'s: 49U002107H1LB2, 49U001457H1LB2, 49U002256H1LB2, 49U001767H1LB2 36,000 BTU · Split System ×4
MODEL: PEAD-AA36NL SERIAL # 53R0095130P31B 36,000 BTU · Fan Coil Indoor ×4
Ventilation
Panasonic FV-0510VSCL1 100 CFM · Exhaust Fan ×9
1 project · most recent 10/06/2026
Sprinkler System
FiledStatusContractorScope
10/06/2026——Sprinkler System
2 projects · most recent 10/06/2026
Gas Water/Sanitary
FiledStatusContractorScope
10/06/2026Permit IssuedPegasus P&HGas, Water/Sanitary
12/05/2025——Gas, Water/Sanitary
1 project · most recent 12/20/2025
General Wiring
FiledStatusContractorScope
12/20/2025Permit IssuedBlue Seagull ElectricalGeneral Wiring
2 projects · most recent 10/06/2026
Steel Masonry Wood
FiledStatusContractorScope
10/06/2026Permit IssuedPegasus P&HSteel, Masonry, Wood
12/05/2025Permit IssuedArtur KalajSteel
▾Special Inspection Requirements (DOB NOW) — 69
DateRequirementInspectorRole
10/06/2026FinalNizar Khouryprogress
10/06/2026MasonryNizar Khouryspecial
10/06/2026Post-installed AnchorsNizar Khouryspecial
10/06/2026Structural Cold-Formed SteelNizar Khouryspecial
10/06/2026Structural Steel - DetailsNizar Khouryspecial
10/06/2026Structural Steel - WeldingNizar Khouryspecial
10/06/2026Structural Wood FrameNizar Khouryprogress
09/25/2026Fire-Resistant Penetrations and JointsILYA VILNITSspecial
09/25/2026Fenestration air leakageILYA VILNITSenergy_progress
09/25/2026Air barrier - visual inspectionILYA VILNITSenergy_progress
09/25/2026MeteringILYA VILNITSenergy_progress
09/25/2026Fire-Resistance Rated ConstructionILYA VILNITSprogress
09/25/2026Energy Code Compliance InspectionsILYA VILNITSprogress
09/25/2026Exterior lighting powerILYA VILNITSenergy_progress
09/25/2026Fenestration areasILYA VILNITSenergy_progress
09/25/2026Lighting controlsILYA VILNITSenergy_progress
09/25/2026Fenestration and door U-factor and product ratingsILYA VILNITSenergy_progress
09/25/2026Lighting in dwelling unitsILYA VILNITSenergy_progress
05/29/2026Maintenance information—energy_progress
05/29/2026Shutoff dampers—energy_progress
05/29/2026Permanent certificate—energy_progress
05/29/2026Fire-Resistant Penetrations and Joints—special
05/29/2026Energy Code Compliance Inspections—progress
05/26/2026Structural Wood FrameNizar Khouryprogress
05/26/2026HVAC-R and service water heating equipment—energy_progress
Latest 25 of 69.
▾Documents — 60 on file (BIS + DOB NOW)
▸Plans & Drawings9
▸DOB NOWPlans/Sketch9
08/20/2026B01285995-S1Request digital key ↗
08/20/2026B01285995-S3Request digital key ↗
08/20/2026B01285995-S2Request digital key ↗
Showing 3 of 9 on file for this type
▸Seals & Professional Certifications40
▸DOB NOWSpecial Inspector Seal & Signature16
10/08/2026B01369934-P2Open ↗
10/08/2026B01369934-P2Open ↗
10/08/2026B01369934-P2Open ↗
Showing 3 of 16 on file for this type
▸DOB NOWProgress Inspector Seal & Signature14
10/08/2026B01369934-P2Open ↗
10/08/2026B01369934-P2Open ↗
10/05/2026B01369934-P1Open ↗
Showing 3 of 14 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature10
10/08/2026B01369934-P2Open ↗
08/20/2026B01285995-S3Open ↗
08/20/2026B01285995-S2Open ↗
Showing 3 of 10 on file for this type
▸Safety & Tenant Protection1
▸DOB NOWStreet Tree Checklist1
08/13/2026B01369934-I1Open ↗
▸Environmental & Asbestos9
▸DOB NOWDEP ACP-5: Asbestos Assessment Report9
10/08/2026B01369934-P2Open ↗
08/20/2026B01285995-S2Open ↗
08/20/2026B01285995-S1Open ↗
Showing 3 of 9 on file for this type
▸Other Documents1
▸DOB NOWProperty Ownership Certification1
08/16/2026B01369934-I1Open ↗