Toronto address · Ward 11, University-Rosedale
423 Ossington Ave
The City of Toronto has 7 building permits since 2017 (3 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.
- Inspections under way
Heating and ventilation
HVAC - Basement underpinningAs per review, scope of work also shown as interior alterations throughout dwelling
Applied Sep 26, 2022 · issued Jul 16, 2024 · Permit 22 120158 HVA
- Inspections under way
Small residential project · Underpinning
Basement underpinning
Applied Mar 7, 2022 · issued Jul 16, 2024 · Permit 22 120158 BLD
- Closed
Drains and site services
Drain - Basement underpinning
Applied Mar 7, 2022 · issued Jul 16, 2024 · completed Oct 28, 2025 · Permit 22 120158 DRN
- Inspections under way
Small residential project · Second suite (New)
Construct a second suite on the 2nd floor with a new kitchen.
Applied Nov 13, 2020 · issued Dec 2, 2020 · 1 home added · Permit 20 217975 BLD
- Revocation pending
Plumbing
Plumbing - Construct a second suite on the 2nd floor with a new kitchen.
Applied Nov 13, 2020 · issued Dec 2, 2020 · Permit 20 217975 PLB
- Cancelled
Plumbing
Plumbing - Proposed a second suite on the 2nd floor with a new kitchen.
Applied Sep 3, 2020 · completed Sep 17, 2020 · Permit 20 189577 PLB
- Cancelled
Small residential project · Interior alterations
Proposed a second suite on the 2nd floor with a new kitchen.
Applied Sep 3, 2020 · completed Sep 17, 2020 · 1 home added · Permit 20 189577 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
- Under review
- Under appeal
- Approved
6 storeys · 19 homes · Residential
480 m away · Site plan · Approved · filed Jul 10, 2025
Neighbours’ Committee of Adjustment files within 250 m
350 Ossington Ave · Minor variance
To alter the existing two-and-one-half-storey townhouse dwelling by constructing a new rear one-storey addition (with a second storey rooftop deck above), and a new rear third storey dormer addition. The existing rear third storey dormer, rear one-storey addition, and rear ground floor deck will be demolished.
190 m away · filed Mar 25, 2026 · Approved
409 Ossington Ave · Consent
To obtain consent for the technical severance of the property for the purpose of re-establishing two residential lots which merged on title.
30 m away · filed Feb 5, 2026 · Approved
186 Roxton Rd · Minor variance
To alter the existing two-storey semi-detached dwelling by constructing a side (south) one-storey addition, a rear two-storey addition (above with a portion of the existing one-storey), and a partial third storey addition (dormer) with a rear (west) deck. Also, to alter the existing one-storey ancillary building (detached garage in the rear yard, abutting the lane) by reducing a front (east) portion of the building (storage shed), and to construct a front (east) canopy structure (awning).
70 m away · filed Dec 4, 2025 · Approved
260 Roxton Rd · Minor variance
To alter the existing two-storey townhouse dwelling by constructing rear one and two-storey additions, a rear second floor deck (above the new rear one-storey addition), and a rear ground floor deck. The existing rear one-storey addition, and rear ground floor deck will be demolished.
180 m away · filed May 9, 2025 · Approved
475 Ossington Ave · Minor variance
To alter the existing two-and-one-half-storey detached dwelling by constructing a rear second storey addition with a rear third storey rooftop deck. There will be three residential dwelling units within this dwelling.
180 m away · filed Nov 21, 2023 · Approved
29 Shannon St · Minor variance
To alter the existing two-storey detached dwelling by constructing third storey additions with a rear balcony, and a rear two-storey addition with a ground floor patio.
130 m away · filed Aug 8, 2023 · Approved
178 Roxton Rd · Minor variance
To convert the existing three-storey semi-detached dwelling from one-unit into two-units by installing one secondary suite within the basement. Also, to construct a rear second and third storey addition, a ground floor covered front porch, second storey front balcony, third storey rear balcony, and front and rear basement walkouts. In addition, to construct a new one-storey ancillary building (detached garage) in the rear yard, abutting the laneway.
70 m away · filed Nov 30, 2022 · Approved
15 Churchill Ave · Minor variance
To permit two secondary suites (this dwelling will have a total of one primary unit and two secondary suites) within the existing two-and-one-half-storey detached dwelling.
230 m away · filed Nov 17, 2022 · Approved
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.