Toronto address · Ward 5, York South-Weston
405 Blackthorn Ave
The City of Toronto has 1 building permit since 2017 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.
- Cancelled
Small residential project · Addition(s)
Proposal to construct partial second storey addition over existing first floor
Applied Aug 7, 2012 · completed Nov 29, 2017 · Permit 12 225005 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
14 Haverson Blvd · Minor variance
To construct a second storey addition above the existing dwelling.
220 m away · filed Jul 31, 2026 · Approved
343 Blackthorn Ave · Minor variance
To construct a new fourplex and a new as of right garden suite in the rear.
240 m away · filed May 8, 2026 · Approved
380 Caledonia Rd · Consent
To obtain consent to sever the property into five residential lots.
240 m away · filed Jun 2, 2025 · Postponed
380 Caledonia Rd · Minor variance
To construct a three-storey detached dwelling with an integral garage, a front porch with canopy and stairs, a rear basement walkout, a rear deck with stairs and a front and rear third storey balcony.
240 m away · filed May 6, 2025 · Postponed
380 Caledonia Rd · Minor variance
To construct a three-storey detached dwelling with an integral garage, a front porch with canopy and stairs, a rear basement walkout, a rear deck with stairs and a front and rear third storey balcony.
240 m away · filed May 6, 2025 · Postponed
380 Caledonia Rd · Minor variance
To construct a three-storey detached dwelling with an integral garage, a front porch with canopy and stairs, a rear basement walkout, a rear deck with stairs and a front and rear third storey balcony.
240 m away · filed May 6, 2025 · Postponed
380 Caledonia Rd · Minor variance
To construct a three-storey detached dwelling with an integral garage, a front porch with canopy and stairs, a rear basement walkout, a rear deck with stairs and a front and rear third storey balcony.
240 m away · filed May 6, 2025 · Postponed
380 Caledonia Rd · Minor variance
To construct a three-storey detached dwelling with an integral garage, a front porch with canopy and stairs, a rear basement walkout, a rear deck with stairs and a front and rear third storey balcony.
240 m away · filed May 6, 2025 · Postponed
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.