Toronto address · Ward 3, Etobicoke-Lakeshore

45 Twenty Third St

R.L. Clark Water Treatment Plant

The City of Toronto has 19 building permits since 2017 (14 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.

Fire and security upgrade · Fire alarm
Proposal for replacement of fire alarm control panel and remote annuciators
Applied Oct 31, 2025 · issued Nov 25, 2025 · Permit 25 247298 FSU
Permit issued
Addition or alteration · Interior alterations
Proposal to relocate the existing ceiling I-beams to locations entered above the existing chlorine evaporators and existing sulphur dioxide evaporators in accordance with drawings and specifications.
Applied Feb 15, 2022 · issued May 17, 2022 · completed Oct 21, 2024 · Permit 22 114599 BLD
Closed
Addition or alteration · Interior alterations
Upgrades of Toronto Water facilities server/computer room and supporting infrastructure
Applied Dec 3, 2021 · issued Mar 30, 2022 · Permit 21 244729 BLD
Inspections under way
Heating and ventilation
HVAC - Upgrades of Toronto Water facilities server/computer room and supporting infrastructure
Applied Dec 3, 2021 · issued Mar 30, 2022 · Permit 21 244729 HVA
Inspections under way
Plumbing
Plumbing - Upgrades of Toronto Water facilities server/computer room and supporting infrastructure
Applied Dec 3, 2021 · issued Mar 30, 2022 · Permit 21 244729 PLB
Inspections under way
Plumbing
Plumbing - Loading dock renovation of the Dry Chemical BuildingNew Water Heater Tank and Emergency Eye wash and shower stationModify vestibule at Gaseous Chemical BuildingExterior wall demolition and new window installation at Gaseous Chemical BuildingLighting upgrades across entire plant
Applied Aug 24, 2016 · issued Nov 23, 2017 · Permit 16 212189 PLB
Inspections under way
Addition or alteration · Interior alterations
Loading dock renovation of the Dry Chemical BuildingNew Water Heater Tank and Emergency Eye wash and shower stationModify vestibule at Gaseous Chemical BuildingExterior wall demolition and new window installation at Gaseous Chemical BuildingLighting upgrades across entire plantRe-Cladding all above buildings
Applied Aug 24, 2016 · issued Oct 26, 2016 · Permit 16 212189 BLD
Inspections under way
Heating and ventilation
HVAC - Loading dock renovation of the Dry Chemical BuildingNew Water Heater Tank and Emergency Eye wash and shower stationModify vestibule at Gaseous Chemical BuildingExterior wall demolition and new window installation at Gaseous Chemical BuildingLighting upgrades across entire plant
Applied Aug 24, 2016 · issued Nov 23, 2017 · Permit 16 212189 HVA
Inspections under way
Heating and ventilation · Special ventilation system
Installation of dust collector special ventilation system.
Applied Mar 19, 2014 · issued Mar 31, 2014 · Permit 14 130486 MSA
Inspections under way
Addition or alteration · Multiple projects
Construct (4) walls and a roof to accomodate access into below grade water resevoir. Reclad (4) exterior walls and upgrade roof membrane system for existing below grade surge tank building.*R L Clark Water Treatment Plant*
Applied Jul 26, 2013 · issued Aug 29, 2013 · Permit 13 211221 BLD
Inspections under way
Plumbing
Revision 02: Installation of backflow preventers and additional piping.(Plumbing - Structural concrete repairs to existing tanks, walls and slabs, process upgrade to an existing R.L. Clark Water treatment Plant. Install (3) new sump pumps due to structural concrete repairs to existing tanks, wall, slabs, process upgrades to an existing "R L Clark Water Treatment Plant")
Applied May 31, 2013 · issued Jun 20, 2013 · completed Oct 8, 2025 · Permit 11 106068 PLB (revision 02)
Closed
Addition or alteration · Interior alterations
Alteration to roof structure to support installation of ductwork for new humidifiers and fans.
Applied Sep 21, 2012 · issued Oct 24, 2012 · Permit 12 250958 BLD
Permit issued

Show 7 more permits

Heating and ventilation
HVAC -Installation of 4 electric dehumidifiers, 3 circulation fans and associated controls
Applied Sep 21, 2012 · issued Dec 8, 2017 · Permit 12 250958 HVA
Permit issued
Plumbing
Revision 01 re; To replace carbon steel pipe to stainless steel pipe.Plumbing - Structural concrete repairs to existing tanks, walls and slabs, process upgrade to an existing R.L. Clark Water treatment Plant. Install (3) new sump pumps due to structural concrete repairs to existing tanks, wall, slabs, process upgrades to an existing "R L Clark Water Treatment Plant"
Applied Apr 20, 2012 · issued May 11, 2012 · completed Oct 8, 2025 · Permit 11 106068 PLB (revision 01)
Closed
Plumbing
Plumbing - Structural concrete repairs to existing tanks, walls and slabs, process upgrade to an existing R.L. Clark Water treatment Plant. Install (3) new sump pumps due to structural concrete repairs to existing tanks, wall, slabs, process upgrades to an existing "R L Clark Water Treatment Plant"
Applied Jan 17, 2011 · issued Apr 10, 2012 · completed Oct 8, 2025 · Permit 11 106068 PLB
Closed
Plumbing
Plumbing - Interior alterations to lab and replace doors on various floors. (23) fixtures to lab and floor drains
Applied Feb 11, 2010 · issued May 17, 2010 · Permit 10 117458 PLB
Inspections under way
Addition or alteration · Multiple projects
Interior alterations to lab and replace doors on various floors
Applied Feb 11, 2010 · issued May 17, 2010 · Permit 10 117458 BLD
Inspections under way
Heating and ventilation
HVAC - Interior alterations to lab and replace doors on various floors. Exhaust to lab
Applied Feb 11, 2010 · issued May 17, 2010 · Permit 10 117458 HVA
Inspections under way
Plumbing · Backflow prevention devices (Water only)
Back Flow Preventers to Water Filtration Plant
Applied Mar 17, 2003 · issued Mar 17, 2003 · completed Jun 8, 2026 · Permit 03 115354 PSA
Closed (dormant)

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.
190 m away · filed Aug 31, 2026 · Hearing scheduled
12 Meaford Ave · Minor variance
To construct a second-storey addition above the existing dwelling.
190 m away · filed Apr 10, 2026 · Approved
15 Ramsgate Rd · Minor variance
To construct a new detached dwelling with an attached garage.
220 m away · filed Mar 30, 2023 · Refused
15 Ramsgate Rd · Consent
To obtain consent to sever the property into two undersized residential lots.
220 m away · filed Mar 30, 2023 · Refused
15 Ramsgate Rd · Minor variance
To construct a new detached dwelling with an attached garage.
220 m away · filed Mar 30, 2023 · Refused
40 Twenty Third St · Minor variance
To construct a new detached dwelling with a new detached garage.
90 m away · filed Oct 12, 2022 · Approved
33 Twenty Fifth St · Minor variance
To construct a second storey addition over existing car port.
210 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.
180 m away · filed Jun 1, 2021 · Approved

Everything planned in Etobicoke-Lakeshore

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.