21 Blackthorn Ave

Building permits

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

• Addition or alteration · Interior alterations

  To construct additional structural support for east side foundation wall of existing church.

  Applied Jun 11, 2009 · issued Jun 16, 2009 · Permit 09 148695 BLD

  Inspections under way

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

• 1613 St Clair Avenue West

  21 storeys · 330 homes · Mixed use

  250 m away · Rezoning · Under review · filed Dec 18, 2025

  Under review

• 1613 St Clair Avenue West

  17 storeys · 258 homes · Mixed use

  250 m away · Site plan · Under review · filed Jun 24, 2022

  Under review

• 20-36 Caledonia Road and 1500-1536 St Clair Avenue West

  17 storeys · Mixed use

  260 m away · Condominium · Under review · filed Oct 25, 2021

  Under review

• 1492 St Clair Avenue West

  18 storeys · 211 homes · Mixed use

  320 m away · Rezoning · Under review · filed Jun 20, 2025

  Under review

Neighbours’ Committee of Adjustment files within 250 m

• 7 Howick Ave · Minor variance

  To legalize and to maintain the rear second storey addition (including a staircase leading to this addition), to the existing two-storey semi-detached dwelling, that was constructed without an authorized building permit.

  170 m away · filed Apr 24, 2026 · Approved

• 20 Howick Ave · Minor variance

  To construct a new three-storey detached dwelling with a covered front porch with stairs, a side (east) second storey patio, a rear ground floor deck, and a rear third storey deck. Also, to construct a rear one-storey detached ancillary building (shed). The existing front yard parking pad and driveway will be removed.

  230 m away · filed Apr 9, 2026 · Approved

• 66 Silverthorn Ave · Minor variance

  To alter the existing two-storey semi-detached dwelling by replacing the front yard parking space with an exterior staircase (which will lead to all levels and the rooftop).

  200 m away · filed Jun 24, 2025 · Approved

• 67 Hounslow Heath Rd · Minor variance

  To construct a one-storey detached ancillary building (one-car garage) in the rear yard of the property, abutting the laneway.

  240 m away · filed Jun 16, 2025 · Approved

• 37 Blackthorn Ave · Minor variance

  To alter the existing two-storey detached dwelling by constructing a partial rear third storey addition, and a front third storey rooftop deck (above the second storey portion of the dwelling).

  60 m away · filed Jun 13, 2025 · Approved

• 49 Hounslow Heath Rd · Minor variance

  To construct a new one-storey ancillary building (for office use space, and a washroom) in the rear yard, abutting the laneway. This current application is necessitated to seek further approval for the removal of the lawfully existing parking space on-site (as cited below) from the previously approved Minor Variance Decision (under File Number A0927/24TEY).

  240 m away · filed Jun 9, 2025 · Approved

• 49 Hounslow Heath Rd · Minor variance

  To alter the existing two-storey semi-detached dwelling by constructing a front basement walkout, a rear ground floor addition, a rear ground floor deck with stairs, and a rear second floor balcony. Also, to construct a one-storey ancillary building (for office space with a washroom) in the rear yard. The existing garage will be demolished. The main dwelling will have a total of three residential dwelling units (triplex) on this lot.

  240 m away · filed Oct 23, 2024 · Approved

• 37 Blackthorn Ave · Minor variance

  To alter the existing two-storey detached dwelling by constructing a third storey addition with a deck (above a portion of the second storey of this dwelling).

  60 m away · filed Aug 22, 2024 · Approved

Everything planned in Davenport