Toronto address · Ward 6, York Centre
4905 Dufferin St
The City of Toronto has 13 building permits since 2017 (7 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.
- Permit issued
Heating and ventilation · Alter: Boiler/Furnace/AC replacement
Cooling towers & chiller upgrades
Applied Sep 18, 2018 · issued Oct 29, 2018 · Permit 18 227566 MSA
- Closed
Plumbing
Plumbing - Interior Alterations. Upgrade Fire Separation, Correct other Code Deficiencies. Upgrade Egress to Day Care Centre.
Applied Jun 6, 2018 · issued Jul 12, 2018 · completed Jul 20, 2022 · Permit 18 152446 PLB
- Closed
Heating and ventilation
HVAC - Interior Alterations. Upgrade Fire Separation, Correct other Code Deficiencies. Upgrade Egress to Day Care Centre.
Applied Jun 6, 2018 · issued Jul 12, 2018 · completed Jul 20, 2022 · Permit 18 152446 HVA
- Closed
Addition or alteration · Interior alterations
Interior Alterations. Upgrade Fire Separation, Correct other Code Deficiencies. Upgrade Egress to EXISTING DAY CARE CENTRE.
Applied May 2, 2018 · issued Jul 12, 2018 · completed Jun 12, 2023 · Permit 18 152446 BLD
- Permit issued
Plumbing
Plumbing - Alterations to the laboratory on the second floor - Environment Canada
Applied Jan 13, 2012 · issued Mar 1, 2012 · Permit 12 105850 PLB
- Permit issued
Addition or alteration · Interior alterations
Alterations to the laboratory on the second floor - Environment Canada
Applied Jan 13, 2012 · issued Mar 1, 2012 · Permit 12 105850 BLD
- Permit issued
Heating and ventilation
HVAC - Alterations to the laboratory on the second floor - Environment Canada
Applied Jan 13, 2012 · issued Mar 1, 2012 · Permit 12 105850 HVA
- Closed
Addition or alteration · Interior alterations
Environment Canada - Mechanical room expansion of piping within room. No changes to room
Applied Oct 25, 2011 · issued Jan 24, 2012 · completed Oct 8, 2025 · Permit 11 298726 BLD
- Closed (dormant)
Fire and security upgrade · Fire doors retrofit
Replace the 26 electrical room doors with fire rated doors
Applied Feb 25, 2010 · issued Mar 29, 2010 · completed Jun 8, 2026 · Permit 10 123674 FSU
- Inspections under way
Heating and ventilation · Alter: add on /Ductwork
Ductwork alteration to Environment Canada on the second floor
Applied Dec 18, 2008 · issued Jan 8, 2009 · Permit 08 230991 MSA
- Inspections under way
Addition or alteration · Interior alterations
Alterations to security office on the ground floor
Applied Feb 19, 2008 · issued Mar 4, 2008 · Permit 08 112221 BLD
- Inspections under way
Heating and ventilation · Heat/Ventilation: SFD/Semi/TH
New heating and vent and upgrade genrater.
Applied Mar 19, 2007 · issued Apr 3, 2007 · Permit 07 116655 MSA
Show 1 more permit
- Closed
Addition or alteration · Interior alterations
RETROFIT
Applied May 19, 1995 · issued Jul 24, 1995 · completed Nov 18, 2025 · Permit 95 251057 BLD
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.
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.