Toronto address · Ward 3, Etobicoke-Lakeshore
1 Twenty Third St
The City of Toronto has 8 building permits since 2017 (6 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
Addition or alteration · Interior alterations
Interior alterations to add a vestibule at two exits in the chloride / sulphur dioxide storage room for City Water Treatment Plant.
Applied May 22, 2009 · issued Jun 5, 2009 · Permit 09 140935 BLD
- Closed (dormant)
Heating and ventilation
HVAC - Construction of reinforced concrete foundation to support electrical equipment, and replacement/upgrading of existing electrical and HVAC equipment at the "RL Clark Water Treatment Plant"
Applied Jun 10, 2008 · issued Jul 25, 2008 · completed Jun 8, 2026 · Permit 08 163901 HVA
- Closed (dormant)
Fire and security upgrade · Standpipes
Install a new sprinkler system on the 1st and 2nd floors to an existing R L Clark water filtration plant , office area
Applied Dec 12, 2006 · issued Feb 13, 2007 · completed Jun 8, 2026 · Permit 06 197520 FSU
- Inspections under way
Addition or alteration · Multiple projects
interior alterations in office area of water treatment plant and exterior alterations to facades of building [Note: Previous building permits approved under No. 1 Twenty Third Street]
Applied Mar 21, 2006 · issued Jun 13, 2006 · Permit 06 118751 BLD
- Inspections under way
Heating and ventilation
HVAC - interior alters in office area of water treatment plant and exterior alters to facades of building - Multiple Projects
Applied Mar 21, 2006 · issued Aug 15, 2006 · Permit 06 118751 HVA
- Inspections under way
Plumbing
Plumbing - interior alters in office area of water treatment plant and exterior alters to facades of building - Multiple Projects
Applied Mar 21, 2006 · issued Jun 13, 2006 · Permit 06 118751 PLB
- Inspections under way
Heating and ventilation
HVAC - Construction of "Residue Management facilities" at the R.L Clark Water Filtration Plant. Work includes a 3 section below grade Clarification Facility (Part 1) with 2 above grade access stairs, and a 2 storey "Centifuge Building" (Part 2) - Addition(s)
Applied Aug 31, 2004 · issued Feb 25, 2005 · Permit 04 164996 HVA
- Inspections under way
Plumbing
Plumbing - Construction of "Residue Management facilities" at the R.L Clark Water Filtration Plant. Work includes a 3 section below grade Clarification Facility (Part 1) with 2 above grade access stairs, and a 2 storey "Centifuge Building" (Part 2) - Addition(s)
Applied Aug 31, 2004 · issued Feb 25, 2005 · Permit 04 164996 PLB
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 Ramsgate Rd · Minor variance
To construct a one-storey west side addition.
180 m away · filed Aug 31, 2026 · Hearing scheduled
12 Meaford Ave · Minor variance
To construct a second-storey addition above the existing dwelling.
240 m away · filed Apr 10, 2026 · Approved
15 Ramsgate Rd · Minor variance
To construct a new detached dwelling with an attached garage.
200 m away · filed Mar 30, 2023 · Refused
15 Ramsgate Rd · Consent
To obtain consent to sever the property into two undersized residential lots.
200 m away · filed Mar 30, 2023 · Refused
15 Ramsgate Rd · Minor variance
To construct a new detached dwelling with an attached garage.
200 m away · filed Mar 30, 2023 · Refused
40 Twenty Third St · Minor variance
To construct a new detached dwelling with a new detached garage.
100 m away · filed Oct 12, 2022 · Approved
33 Twenty Fifth St · Minor variance
To construct a second storey addition over existing car port.
220 m away · filed Sep 14, 2022 · Approved
15 Meaford Ave · Minor variance
To construct a new detached dwelling with a parking pad and shed in the rear yard.
220 m away · filed Jun 1, 2021 · 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.