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Two family converted from one family
173 PROSPECT PLACE
BROOKLYN · BIN 3028461
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1870Year Built
3Stories
B3Building Class
R6BZoning
3,760 sfGross Floor Area
2Units
Two family converted from one family · Owner of record: CORN FUND LLC · 2,620 sf lot · 1.44 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbingFire Protection
Roof4p · 1 filing · 18 docs
Floor 23p · 1 filing · 18 docs
Floor 12p · 1 filing · 18 docs
Cellar5p · 1 filing · 18 docs
Basement1p · 1 filing · 18 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
07/14/2022$5.0M—— → —$1,330/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
AI-ALT STRUCTURAL ENGINEERING PLLC301/15/2024
BOWERBIRD ARCHITECT, PLLC112/05/2023
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
BMB BUILDING CONSULTING803/21/2026
Building Lifecycle
All (40)Filed (4)Objection (25)Special Inspection (11)
12/09/2025
Objection resolved — Resolved
09/04/2025
Objection resolved — Resolved
09/02/2025
Objection resolved — Resolved
09/02/2025
Objection resolved — Resolved
07/16/2024
Objection resolved — Resolved
07/05/2024
Objection resolved — Resolved
07/05/2024
Objection resolved — Resolved
07/05/2024
Objection resolved — Resolved
07/05/2024
Objection resolved — Resolved
01/23/2024
Objection raised — Scope
01/23/2024
Objection raised — Inspections
01/23/2024
Objection raised — Scope
01/23/2024
Objection raised — Scope
01/23/2024
Objection raised — Energy
01/22/2024
Objection raised — Scope
01/22/2024
Objection raised — Energy
01/15/2024
Filed — Alteration CO
PROPOSE CONVERSION OF EXISTING 2-FAMILY TO 1-FAMILY HOUSE INCLUDES GENERAL CONSTRUCTION WORKS AS PER PLAN. OBTAIN NEW C OF O.
B00945367-S2
01/15/2024
Filed — Alteration CO
PROPOSE CONVERSION OF EXISTING 2-FAMILY TO 1-FAMILY HOUSE INCLUDES GENERAL CONSTRUCTION WORKS AS PER PLAN. OBTAIN NEW C OF O.
B00945367-S1
01/15/2024
Filed — Alteration CO
PROPOSE CONVERSION OF EXISTING 2-FAMILY TO 1-FAMILY HOUSE INCLUDES GENERAL CONSTRUCTION WORKS AS PER PLAN. OBTAIN NEW C OF O.
B00945367-S3
01/12/2024
Objection resolved — Addressed
12/22/2023
Objection resolved — Addressed
12/22/2023
Objection resolved — Addressed
12/12/2023
Objection raised — Scope
12/12/2023
Objection raised — Other
12/12/2023
Objection raised — Structural
12/12/2023
Objection raised — Other
12/12/2023
Objection raised — Fire_Protection
12/11/2023
Objection raised — Energy
12/05/2023
Filed — Alteration CO
PROPOSE CONVERSION OF EXISTING 2-FAMILY TO 1-FAMILY HOUSE INCLUDES GENERAL CONSTRUCTION WORKS AS PER PLAN. OBTAIN NEW C OF O.
B00945367-I1
10/09/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
10/09/2023
Special inspection requirement — Energy Code Compliance Inspections
10/09/2023
Special inspection requirement — Fire-Resistance Rated Construction
10/09/2023
Special inspection requirement — Exterior lighting power
10/09/2023
Special inspection requirement — Insulation placement and R values
10/09/2023
Special inspection requirement — Lighting in dwelling units
10/09/2023
Special inspection requirement — Fenestration air leakage
10/09/2023
Special inspection requirement — Fenestration and door U-factor and product ratings
10/09/2023
Special inspection requirement — Fenestration areas
10/09/2023
Special inspection requirement — Metering
10/09/2023
Special inspection requirement — Lighting controls
Nothing on file for this building.
1 project · most recent 01/15/2024
Heating and Air Conditioning Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
01/15/2024——Heating and Air Conditioning Systems, Ventilation Systems
Heat / Cool
Daikin RXTQ48TAVJUA 52,000 BTU · Vrf Outdoor ×2
RXTQ36TAVJ9A 40,000 BTU · Vrf Outdoor ×1
Ventilation
Pelonis FD140G 280 CFM · Exhaust Fan ×1
FD180H 612 CFM · Kitchen Exhaust ×1
Daikin VAM300GVJU 300 CFM · Erv ×1
1 project · most recent 01/15/2024
Sprinkler System
FiledStatusContractorScope
01/15/2024——Sprinkler System
1 project · most recent 01/15/2024
Water/Sanitary
FiledStatusContractorScope
01/15/2024——Water/Sanitary
1 project · most recent 01/15/2024
Steel Concrete
FiledStatusContractorScope
01/15/2024——Steel, Concrete
▾Special Inspection Requirements (DOB NOW) — 11
DateRequirementInspectorRole
10/09/2023Structural Stability – Alterations of existing buildings—special
10/09/2023Energy Code Compliance Inspections—progress
10/09/2023Fire-Resistance Rated Construction—progress
10/09/2023Exterior lighting power—energy_progress
10/09/2023Insulation placement and R values—energy_progress
10/09/2023Lighting in dwelling units—energy_progress
10/09/2023Fenestration air leakage—energy_progress
10/09/2023Fenestration and door U-factor and product ratings—energy_progress
10/09/2023Fenestration areas—energy_progress
10/09/2023Metering—energy_progress
10/09/2023Lighting controls—energy_progress
▾Documents — 18 on file (BIS + DOB NOW)
▸Plans & Drawings4
▸DOB NOWPlans/Sketch4
08/26/2026B00945367-S3Request digital key ↗
08/26/2026B00945367-S2Request digital key ↗
08/26/2026B00945367-S1Request digital key ↗
Showing 3 of 4 on file for this type
▸Applications & Permits3
▸DOB NOWLPC Approval/Permit3
08/13/2026B00945367-I1Open ↗
08/13/2026B00945367-S3Open ↗
08/13/2026B00945367-S2Open ↗
▸Zoning, Tax Lot & Property Records2
▸DOB NOWZD1: DOB Zoning Diagram1
08/13/2026B00945367-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)1
08/13/2026B00945367-I1Open ↗
▸Seals & Professional Certifications4
▸DOB NOWDPL-1: Design Professional Seal & Signature4
08/26/2026B00945367-S2Open ↗
08/26/2026B00945367-S3Open ↗
08/26/2026B00945367-S1Open ↗
Showing 3 of 4 on file for this type
▸Safety & Tenant Protection1
▸DOB NOWStreet Tree Checklist1
08/13/2026B00945367-I1Open ↗
▸Other Documents4
▸DOB NOWProperty Ownership Certification1
08/26/2026B00945367-I1Open ↗
▸DOB NOWSite Survey: Initial1
08/13/2026B00945367-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone1
08/13/2026B00945367-I1Open ↗
▸DOB NOWPlot Diagram1
08/13/2026B00945367-I1Open ↗