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Two stories - detached, small or mid-size
306 23 STREET
BROOKLYN · BIN 3017719
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1901Year Built
2Stories
A1Building Class
R6BZoning
985 sfGross Floor Area
1Units
FDNY Report ↗
Two stories - detached, small or mid-size · 1,669 sf lot · 0.59 FAR built · Flood zone X
Locations of Work
StructuralMechanicalPlumbing
Permit Issued — active, not yet Signed-off
Penthouse1p · 1 filing · 18 docs
Floor 2Under Construction6p · 2 filings · 20 docs
Floor 1Under Construction5p · 1 filing · 20 docs
CellarUnder Construction8p · 2 filings · 20 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
05/06/2021$720K—Private party → Private party$731/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
ARCHITECT-A2 PLLC1012/16/2025
SEVERUD ASSOCIATES103/15/2023
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
LEECO CONSTRUCTION CORPGeneral Contractor506/27/2026
RICHAIR MECHANICAL INCGeneral Contractor104/09/2026
QMB PLUMBING & HEATING INCPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
TROLYDIA TESTING & INSPEC4422212/16/2025
FRANKLIN & OAK, INC.5758110/24/2021
Building Lifecycle
All (117)Filed (11)Permit Issued (6)Inspection (6)Objection (64)Special Inspection (30)
05/06/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
01/06/2026
Permit issued — Mechanical Systems
B01140071-S4-MS
12/22/2025
Inspection — Pass-Final SP - Up to 3 Requested Floors
Pass
View inspection ↗
12/17/2025
Permit issued — Construction Fence
B01140071-S1-FN
12/17/2025
Inspection — Certified Storm Drainage-ST-Piping-Roughing
Certified
View inspection ↗
12/17/2025
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
12/16/2025
Filed — Alteration
WATER AND SANITARY PIPING FOR NEW AND RELOCATED PLUMBING FIXTURES. ALTERATION TO ROOF GUTTER AND LEADER. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
B01140071-S4
12/11/2025
Inspection — Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test
Certified
View inspection ↗
11/11/2025
Special inspection requirement — HVAC-R and service water heating equipment
MATTHEW MUELLER
11/11/2025
Special inspection requirement — HVAC-R and service water heating system controls
MATTHEW MUELLER
11/11/2025
Special inspection requirement — HVAC-R and service water piping design and insulation
MATTHEW MUELLER
11/10/2025
Special inspection requirement — Mechanical Systems
EDWARD TOROSSIAN
11/10/2025
Special inspection requirement — Final
MATTHEW MUELLER
10/29/2025
Permit issued — Plumbing
B01140071-S3-PL
10/20/2025
Filed — Alteration
WATER AND SANITARY PIPING FOR NEW AND RELOCATED PLUMBING FIXTURES. ALTERATION TO ROOF GUTTER AND LEADER. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
B01140071-S3
09/09/2025
Inspection — Fail-Final CND-Occupancy Inspection
Fail
View inspection ↗
05/07/2025
Permit issued — Structural
B01140071-I1-GC-CX
04/09/2025
Filed — Alteration
WATER AND SANITARY PIPING FOR NEW AND RELOCATED PLUMBING FIXTURES. ALTERATION TO ROOF GUTTER AND LEADER. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
B01140071-P1
04/09/2025
Special inspection requirement — Concrete - Cast-In-Place
04/09/2025
Special inspection requirement — Fenestration and door U-factor and product ratings
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Fenestration areas
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Fire-Resistance Rated Construction
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Final
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Energy Code Compliance Inspections
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Structural Stability – Alterations of existing buildings
04/09/2025
Special inspection requirement — Structural Cold-Formed Steel
04/09/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
04/09/2025
Special inspection requirement — Air barrier - visual inspection
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Interior lighting power
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Insulation placement and R values
MATTHEW MUELLER
04/09/2025
Special inspection requirement — Fenestration air leakage
MATTHEW MUELLER
12/16/2024
Permit issued — Construction Fence
B01140071-S1-FN
11/19/2024
Permit issued — Construction Fence
B01140071-S1-FN
11/17/2024
Filed — Alteration
WATER AND SANITARY PIPING FOR NEW AND RELOCATED PLUMBING FIXTURES. ALTERATION TO ROOF GUTTER AND LEADER. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
B01140071-I1
11/17/2024
Filed — Alteration
WATER AND SANITARY PIPING FOR NEW AND RELOCATED PLUMBING FIXTURES. ALTERATION TO ROOF GUTTER AND LEADER. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
B01140071-S1
10/29/2023
Objection resolved — Addressed
10/29/2023
Objection resolved — Addressed
10/29/2023
Objection resolved — Addressed
10/29/2023
Objection resolved — Addressed
10/21/2023
Objection resolved — Addressed
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Objection resolved — Resolved
10/21/2023
Special inspection requirement — Subgrade Inspections
10/15/2023
Special inspection requirement — Maintenance information
MATTHEW MUELLER
09/29/2023
Objection raised — Structural
09/29/2023
Objection raised — Scope
09/29/2023
Objection raised — Scope
09/29/2023
Objection raised — Other
09/29/2023
Objection raised — Inspections
09/29/2023
Objection raised — Structural
09/26/2023
Filed — New Building
MECHANICAL INSTALLATIONS TO INCLUDE HVAC DISTRIBUTION AND ASSOCIATED PIPING FOR NEW RESIDENTIAL BUILDING.
B00806399-S3
09/26/2023
Special inspection requirement — Post-installed Anchors
09/26/2023
Special inspection requirement — Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation
09/26/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
09/24/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
Latest 60 of 117 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsPermit IssuedRICHAIR MECHANICAL INC01/06/2026
DOB NOWConstruction FenceSigned-offLEECO CONSTRUCTION CORP12/17/2025
DOB NOWPlumbingPermit IssuedQMB PLUMBING & HEATING INC10/29/2025
DOB NOWStructuralPermit IssuedLEECO CONSTRUCTION CORP05/07/2025
DOB NOWConstruction FenceSigned-offLEECO CONSTRUCTION CORP12/16/2024
DOB NOWConstruction FenceSigned-offLEECO CONSTRUCTION CORP11/19/2024
1 project · most recent 09/26/2023
Heating and Air Conditioning Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
09/26/2023——Heating and Air Conditioning Systems, Ventilation Systems
Heat / Cool
Mitsubishi Electric TUMYH0361AK40NA 36,000 BTU · Condensing Unit ×2
MXZ-2C20NA4 20,000 BTU · Condensing Unit ×1
Ventilation
Zehnder ZEHNDER COMFOAIR 160 92 CFM · Erv ×2
1 project · most recent 09/26/2023
Plumbing-Sprinkler Storm Water/Sanitary
FiledStatusContractorScope
09/26/2023——Plumbing-Sprinkler, Storm, Water/Sanitary
1 project · most recent 05/21/2025
FiledStatusContractorScope
05/21/2025Permit Issued5 J'S ELECTL CONTS CORP1 meters, 1 new_meters
2 projects · most recent 09/26/2023
Concrete Steel Masonry
FiledStatusContractorScope
09/26/2023——Steel, Concrete, Masonry
10/24/2021——Concrete
1 project · most recent 06/03/2023
Fence
FiledStatusContractorScope
06/03/2023——Fence
▾Field Inspections (DOB CAP) — 6
DateTypeResultReport
05/06/2026Pass-Final CND-Occupancy InspectionPassView ↗
12/22/2025Pass-Final SP - Up to 3 Requested FloorsPassView ↗
12/17/2025Certified Storm Drainage-ST-Piping-RoughingCertifiedView ↗
12/17/2025Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
12/11/2025Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic TestCertifiedView ↗
09/09/2025Fail-Final CND-Occupancy InspectionFailView ↗
▾Special Inspection Requirements (DOB NOW) — 46
DateRequirementInspectorRole
11/11/2025HVAC-R and service water heating equipmentMATTHEW MUELLERenergy_progress
11/11/2025HVAC-R and service water heating system controlsMATTHEW MUELLERenergy_progress
11/11/2025HVAC-R and service water piping design and insulationMATTHEW MUELLERenergy_progress
11/10/2025Mechanical SystemsEDWARD TOROSSIANspecial
11/10/2025FinalMATTHEW MUELLERprogress
04/09/2025Concrete - Cast-In-Place—special
04/09/2025Fenestration and door U-factor and product ratingsMATTHEW MUELLERenergy_progress
04/09/2025Fenestration areasMATTHEW MUELLERenergy_progress
04/09/2025Fire-Resistance Rated ConstructionMATTHEW MUELLERprogress
04/09/2025FinalMATTHEW MUELLERprogress
04/09/2025Energy Code Compliance InspectionsMATTHEW MUELLERprogress
04/09/2025Structural Stability – Alterations of existing buildings—special
04/09/2025Structural Cold-Formed Steel—special
04/09/2025Fire-Resistant Penetrations and Joints—special
04/09/2025Air barrier - visual inspectionMATTHEW MUELLERenergy_progress
04/09/2025Interior lighting powerMATTHEW MUELLERenergy_progress
04/09/2025Insulation placement and R valuesMATTHEW MUELLERenergy_progress
04/09/2025Fenestration air leakageMATTHEW MUELLERenergy_progress
10/21/2023Subgrade Inspections—special
10/15/2023Maintenance informationMATTHEW MUELLERenergy_progress
09/26/2023Post-installed Anchors—special
09/26/2023Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation—special
09/26/2023Fire-Resistant Penetrations and Joints—special
09/24/2023Fire-Resistant Penetrations and Joints—special
09/24/2023Post-installed Anchors—special
Latest 25 of 46.
▾Documents — 74 on file (BIS + DOB NOW)
▸Plans & Drawings11
▸DOB NOWPlans/Sketch11
08/31/2026B00592232-I1Request digital key ↗
08/27/2026B00806399-I1Request digital key ↗
08/27/2026B00884759-I1Request digital key ↗
Showing 3 of 11 on file for this type
▸Applications & Permits5
▸BISPLAN / WORK APPROVAL APPLICATION5
08/27/2024322107830Open ↗
09/21/2023340900083Open ↗
03/24/2023322107830Open ↗
Showing 3 of 5 on file for this type
▸Zoning, Tax Lot & Property Records9
▸DOB NOWZD1: DOB Zoning Diagram4
08/31/2026B00592232-I1Open ↗
08/13/2026B01140071-P1Open ↗
08/13/2026B01140071-I1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWZoning Exhibit form (1-5)4
08/31/2026B00592232-I1Open ↗
08/13/2026B01140071-P1Open ↗
08/13/2026B01140071-I1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026B00806399-I1Open ↗
▸Seals & Professional Certifications21
▸DOB NOWDPL-1: Design Professional Seal & Signature11
08/31/2026B00592232-I1Open ↗
08/27/2026B00806399-S3Open ↗
08/27/2026B00806399-S1Open ↗
Showing 3 of 11 on file for this type
▸DOB NOWProgress Inspector Seal & Signature6
08/27/2026B01140071-P1Open ↗
08/27/2026B01140071-P1Open ↗
08/25/2026B01140071-S4Open ↗
Showing 3 of 6 on file for this type
▸BISAPPLICANT OWNER SIGNATURE1
09/21/2023340900083Open ↗
▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY1
09/21/2023340900083Open ↗
▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION1
03/29/2023322107830Open ↗
▸DOB NOWSpecial Inspector Seal & Signature1
08/25/2026B01140071-S4Open ↗
▸Trade Schedules & Equipment1
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)1
08/13/2026B00806399-I1Open ↗
▸Safety & Tenant Protection4
▸BISDEMOLITION SUBMITTAL CERTIFICATION FORM1
03/29/2023322107830Open ↗
▸BISSTREET TREE CHECKLIST1
09/21/2023340900083Open ↗
▸DOB NOWStreet Tree Checklist1
08/27/2026B00806399-I1Open ↗
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/13/2026B00806399-I1Open ↗
▸Environmental & Asbestos5
▸DOB NOWDEP ACP-5: Asbestos Assessment Report3
08/31/2026B00592232-I1Open ↗
08/23/2026B01140071-I1Open ↗
08/23/2026B01140071-P1Open ↗
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form2
08/23/2026B01140071-S3Open ↗
08/23/2026B01140071-S4Open ↗
▸Energy Compliance1
▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS1
03/29/2023322107830Open ↗
▸Inspections & Test Reports1
▸DOB NOWTR4 Test Report and Plot Diagram1
08/13/2026B00806399-I1Open ↗
▸Approvals, Objections & Sign-offs2
▸BISCONSTRUCTION CODE DETERMINATION1
03/29/2023322107830Open ↗
▸BISLETTERS - SUPPORTING DOCUMENTATION1
03/29/2023322107830Open ↗
▸Filing & Intake Forms3
▸BISADDITIONAL INFORMATION1
03/29/2023322107830Open ↗
▸BISEFILING COVER SHEET1
09/20/2022322107830Open ↗
▸BISEFILING JOB APPLICATION COVER SHEET1
09/21/2023340900083Open ↗
▸Other Documents11
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone4
08/31/2026B00592232-I1Open ↗
08/13/2026B01140071-I1Open ↗
08/13/2026B01140071-P1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWSite Survey: Initial3
08/13/2026B01140071-P1Open ↗
08/13/2026B01140071-I1Open ↗
08/13/2026B00806399-I1Open ↗
▸DOB NOWPlot Diagram3
08/31/2026B00592232-I1Open ↗
08/13/2026B01140071-I1Open ↗
08/13/2026B01140071-P1Open ↗
▸DOB NOWProperty Ownership Certification1
08/27/2026B00806399-I1Open ↗