Toronto address · Ward 5, York South-Weston

405 Silverthorn Ave

The City of Toronto has 4 building permits since 2017 (4 still open) and 1 Committee of Adjustment file 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.

Drains and site services
Drain - Proposal to construct a new two-storey garden suite in the rear yard with an attached garage. The existing detached garage and shed will be demolished.See also 25 222578 ZAP and 25 241231 MV.
Applied Feb 2, 2026 · issued May 21, 2026 · Permit 26 111716 DRN
Permit issued
Plumbing
Plumbing - Proposal to construct a new two-storey garden suite in the rear yard with an attached garage. The existing detached garage and shed will be demolished.See also 25 222578 ZAP and 25 241231 MV.
Applied Feb 2, 2026 · issued May 21, 2026 · Permit 26 111716 PLB
Permit issued
Heating and ventilation
HVAC - Proposal to construct a new two-storey garden suite in the rear yard with an attached garage. The existing detached garage and shed will be demolished.See also 25 222578 ZAP and 25 241231 MV.
Applied Feb 2, 2026 · issued May 21, 2026 · Permit 26 111716 HVA
Permit issued
Small residential project · New laneway / rear yard suite
Proposal to construct a new two-storey garden suite in the rear yard with an attached garage. The existing detached garage and shed will be demolished.See also 25 222578 ZAP and 25 241231 MV.
Applied Feb 2, 2026 · issued May 21, 2026 · 1 home added · Permit 26 111716 BLD
Permit issued

Committee of Adjustment

This address's applications to the City's Committee of Adjustment since 2017, and any still open. A minor variance asks for a small exception to the zoning by-law, such as a little more height or a smaller setback; a consent divides a lot or grants an easement.

Minor variance · New R building
To construct a new two-storey garden suite in the rear yard that will include an attached garage. The existing detached garage and shed will be demolished.
Decision: Approved (hearing Dec 4, 2025)
Filed Oct 17, 2025 · File A0403/25EYK
Closed

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.
230 m away · filed Jul 31, 2026 · Approved
59 Donald Ave · Minor variance
To legalize and to maintain an existing second storey rear addtion with a platform and canopy above, and a rear yard deck.
220 m away · filed Mar 11, 2026 · Approved
81 Aileen Ave · Minor variance
To construct a new fourplex.
50 m away · filed Jan 29, 2026 · Approved
402 Blackthorn Ave · Minor variance
To enclose the existing rear porch.
200 m away · filed Mar 18, 2025 · Approved
20 Kenora Cres · Minor variance
To construct a two-storey rear addition and a new front porch.
160 m away · filed Oct 5, 2022 · Approved
357 Silverthorn Ave · Minor variance
To construct a new dwelling with an integral garage.
220 m away · filed Aug 11, 2022 · Approved
48 Kersdale Ave · Minor variance
To construct a one-storey west side addition, a second and third floor addition above the existing dwelling and a rear yard deck.
160 m away · filed Apr 5, 2022 · Approved
370 Silverthorn Ave · Minor variance
To construct a new front porch.
60 m away · filed Mar 15, 2022 · Approved

Everything planned in York South-Weston

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.