Toronto address · Ward 6, York Centre

4925 Dufferin St

The City of Toronto has 33 building permits since 2017 (12 still open) on record for this address.

Building permits

Every permit the City lists for this address since 2017, and any still open from before, newest first.

Fire and security upgrade · Sprinklers
Proposed sprinklers: 1.3 Prepare engineered sprinkler drawings and hydraulic calculations for class 3 commodity stored up to 30' in single and double row racks as per Chapter 16 of NFPA 13 2013 Edition. Future provision for 2 levels of in-rack sprinkler heads is to be incorporated into sprinkler system engineering documents.1.4 Extend existing 8" sprinkler header and install new 6" isolation valve and 6" alarm valve for new building addition.1.5 Supply and install 6" feed piping to new building addition from existing sprinkler room.1.6 Supply and install gridded sprinkler system in building a…
Applied Sep 4, 2026 · Permit 26 232489 FSU
Application acceptable
Fire and security upgrade
FS - Sprinkler Shop Drawing - proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Feb 24, 2025 · Permit 25 103930 FSU
Application on hold
Drains and site services
Drain - proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Jan 14, 2025 · issued Feb 24, 2025 · Permit 25 103930 DRN
Permit issued
Drains and site services · Site service
Site Service - proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Jan 13, 2025 · issued Feb 24, 2025 · Permit 25 103930 STS
Inspections under way
Plumbing
Plumbing - proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Jan 13, 2025 · issued Feb 24, 2025 · Permit 25 103930 PLB
Permit issued
Heating and ventilation
VAC - proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Jan 13, 2025 · issued Feb 24, 2025 · Permit 25 103930 HVA
Inspections under way
Addition or alteration · Addition(s)
proposal for a one storey addition to an existing one storey building. Building used for storing and archiving University of Toronto Library materials.
Applied Jan 13, 2025 · issued Mar 7, 2025 · Permit 25 103930 BLD
Inspections under way
Drains and site services
Drain - Proposal for a single storey addition to an existing building.
Applied Dec 23, 2024 · completed Dec 31, 2024 · Permit 24 253050 DRN
Cancelled
Drains and site services · Inside and outside drains
Drain - Proposal for a single storey addition to an existing building.
Applied Dec 23, 2024 · completed Dec 31, 2024 · Permit 24 253050 STS
Cancelled
Addition or alteration · Addition(s)
Proposal for a single storey addition to an existing building.
Applied Dec 23, 2024 · completed Dec 31, 2024 · Permit 24 253050 BLD
Cancelled
Plumbing
Plumbing - Proposal for a single storey addition to an existing building.
Applied Dec 23, 2024 · completed Dec 31, 2024 · Permit 24 253050 PLB
Cancelled
Heating and ventilation
HVAC - Proposal for a single storey addition to an existing building.
Applied Dec 23, 2024 · completed Dec 31, 2024 · Permit 24 253050 HVA
Cancelled

Show 21 more permits

Temporary structure · Other temporary tents
Proposed installation of temporary tent at UofT for Aerospace - May 8th to May 13th
Applied May 7, 2024 · issued May 8, 2024 · completed Oct 30, 2024 · Permit 24 145418 TPS
Closed
Designated structure · Solar collector
Proposed solar PV rooftop installation in the existing building.
Applied Sep 19, 2023 · issued Oct 30, 2023 · completed Jun 23, 2025 · Permit 23 204187 DST
Closed
Plumbing
Plumbing - Interior alterations to conver the library to a classroom
Applied May 26, 2022 · issued Jun 28, 2022 · Permit 22 151805 PLB
Permit issued
Heating and ventilation
HVAC - Interior alterations to conver the library to a classroom
Applied May 26, 2022 · issued Jun 29, 2022 · completed Oct 31, 2025 · Permit 22 151805 HVA
Closed
Addition or alteration · Interior alterations
Interior alterations to conver the library to a classroom
Applied May 26, 2022 · issued Jun 28, 2022 · Permit 22 151805 BLD
Inspections under way
Plumbing
Plumbing - Proposal for interior alterations to existing University of Toronto Space Flight Lab
Applied Apr 29, 2021 · issued May 26, 2021 · completed May 13, 2022 · Permit 21 147697 PLB
Closed
Addition or alteration · Interior alterations
Proposal for interior alterations to existing University of Toronto Space Flight Lab
Applied Apr 29, 2021 · issued May 13, 2021 · completed Jun 7, 2022 · Permit 21 147697 BLD
Closed
Heating and ventilation
HVAC - Proposal for interior alterations to existing University of Toronto Space Flight Lab
Applied Apr 29, 2021 · issued May 27, 2021 · completed May 13, 2022 · Permit 21 147697 HVA
Closed
Plumbing · Backflow prevention devices (Water only)
Installation of a 2" backflow prevention device
Applied Oct 1, 2020 · issued Nov 2, 2020 · completed Nov 6, 2020 · Permit 20 201511 PSA
Closed
Plumbing · Backflow prevention devices (Water only)
Install backflow prevevter
Applied Jul 29, 2020 · issued Aug 26, 2020 · completed May 12, 2021 · Permit 20 174352 PSA
Closed
Addition or alteration · Interior alterations
Interior Alterations TO LABORATORY AND OFFICE, FIT - OUT TO ACCOMODATE THE RESEARCH NEEDS OF INSTITUTE FOR AEROSPACE STUDIES.
Applied Apr 26, 2017 · issued Jul 13, 2017 · completed Jul 6, 2018 · Permit 17 149503 BLD
Closed
Heating and ventilation
HVAC - Interior Alterations TO lABORATORY AND OFFICE FIT - OUT TO ACCOMODATE THE RESEARCH NEEDS OF INSTITUTE FOR AEROSPACE STUDIES.
Applied Apr 26, 2017 · issued Jul 14, 2017 · completed Jul 5, 2018 · Permit 17 149503 HVA
Closed
Plumbing
Plumbing - Interior Alterations TO lABORATORY AND OFFICE FIT - OUT TO ACCOMODATE THE RESEARCH NEEDS OF INSTITUTE FOR AEROSPACE STUDIES.
Applied Apr 26, 2017 · issued Jul 14, 2017 · completed Apr 3, 2018 · Permit 17 149503 PLB
Closed
Alternative solution
AS to utilized emergency ventilation and flammable vapour detection system
Applied Oct 13, 2016 · completed Feb 28, 2017 · Permit 16 236710 ALT
Approved
Plumbing
Plumbing - Proposal for interior alterations to an existing industrial building to enable installation of the High Pressure Combustion Research Facility (HPCRF). The new HPCRF will be installed in a portion of the building constructed in 1964 - University of Toronto building.
Applied Jan 26, 2016 · issued Feb 28, 2017 · completed May 13, 2022 · Permit 16 108846 PLB
Closed
Heating and ventilation
HVAC - Proposal for interior alterations to an existing industrial building to enable installation of the High Pressure Combustion Research Facility (HPCRF). The new HPCRF will be installed in a portion of the building constructed in 1964 - University of Toronto building.
Applied Jan 26, 2016 · issued Feb 28, 2017 · completed May 13, 2022 · Permit 16 108846 HVA
Closed
Addition or alteration · Interior alterations
Proposal for interior alterations to an existing industrial building to enable installation of the High Pressure Combustion Research Facility (HPCRF). The new HPCRF will be installed in a portion of the building constructed in 1964 - University of Toronto building.
Applied Jan 26, 2016 · issued Feb 28, 2017 · completed Nov 27, 2025 · Permit 16 108846 BLD
Closed
Drains and site services · Inside and outside drains
Drain - Addition to University of Toronto Institute of Aerospace Studies Microsatellite Science and Technology Centre
Applied Nov 1, 2011 · issued Nov 16, 2011 · Permit 10 317837 STS
Permit issued
Addition or alteration · Addition(s)
Addition to University of Toronto Institute of Aerospace Studies Microsatellite Science and Technology Centre
Applied Dec 21, 2010 · issued Oct 13, 2011 · completed Aug 26, 2025 · Permit 10 317837 BLD
Closed
Plumbing
Plumbing - Addition to University of Toronto Institute of Aerospace Studies Microsatellite Science and Technology Centre
Applied Dec 21, 2010 · issued Oct 27, 2011 · Permit 10 317837 PLB
Inspections under way
Drains and site services · Site service
Relocating existing site services for University of Toronto Institute of Aerospace Studies Microsatellite Science and Technology Centre.
Applied Sep 13, 2010 · issued Nov 4, 2010 · completed Jun 8, 2026 · Permit 10 257062 STS
Closed (dormant)

Committee of Adjustment

No applications to the City's Committee of Adjustment for this address since 2017. That's where an owner asks for a minor variance (a small exception to the zoning by-law) or a consent to divide a lot.

What’s planned nearby

Development sites within 500 m

No rezoning, site plan, subdivision or condominium file open within 500 m, and no pre-construction project on the site.

Neighbours’ Committee of Adjustment files within 250 m

None on file since 2017.

Everything planned in York Centre

From the City of Toronto’s open data: building permits (active, and cleared since 2017), Committee of Adjustment applications and address points, this record updated Sep 29, 2026, and the development sites from its Development Applications data. Contains information licensed under the Open Government Licence – Toronto. Construction cost estimates and contractors’ names are left out on purpose, and nothing here names an owner.