Street · 1139 of 8,567 by permit count
Building permits on William St
The City of Toronto has 166 building permits on record for William St, going back to 2001. Those permits created 20 homes and removed 2, a net change of +18. Declared construction value totals $4.7M. The most recent permit was issued Aug 18, 2026 at 156 William St.
- Permits on record
- 1662001–2026
- Declared construction value
- $4.7Mas filed, not adjusted
- Homes created
- 20dwelling units
- Homes removed
- 2net +18
Permits issued per year
20012026 (part year)
Most common work
Structures worked on
Most recent permits
| Issued | Work | What was filed | Value | Status |
|---|---|---|---|---|
| Aug 18, 2026 | Back Water Valve (Sewer only) | Back water valve installation outside | — | Open |
| Aug 12, 2026 | Interior Alterations | Propose to construct an accessory dwelling unit at basement | $60K | Open |
| Aug 12, 2026 | Building Permit Related(PS) | Plumbing - Propose to construct an accessory dwelling unit at basement | — | Open |
| Jul 8, 2026 | Building Permit Related(PS) | Plumbing - Propose to legalize one storey rear addition - two unit dwelling | — | Open |
| Jul 3, 2026 | Addition(s) | Propose to legalize one storey rear addition - two unit dwelling | $60K | Open |
| Jun 10, 2026 | Multiple Projects | REVISION - Rear conc deck, over rear walkoutTo construct a second storey addition, interior alterations, rear deck for two unit dwelling. Convert single family detached house into a Duplex | — | Open |
| May 29, 2026 | Addition(s) | Proposal to legalize an existing rear 1 storey addition | $1K | Closed |
| May 24, 2026 | Deck | Replace old deck with a new deck same design and dimensions. | $15K | Closed |
| Jan 22, 2026 | Building Permit Related(PS) | Plumbing - Convert the existing dwelling into a fourplex, 2nd and 3rd floor addition, interior alterations and rear deck | — | Open |
| Dec 3, 2025 | Building Permit Related(MS) | HVAC - Convert the existing dwelling into a fourplex, 2nd and 3rd floor addition, interior alterations and rear deck | — | Open |
| Dec 2, 2025 | Multiple Projects | Convert the existing dwelling into a fourplex, 2nd and 3rd floor addition, interior alterations and rear deck | $800K | Open |
| Oct 14, 2025 | Multiple Projects | Revision: Change to basement layout | — | Open |
| Oct 10, 2025 | Building Permit Related(MS) | HVAC - Proposal to demolish existing 1 storey SFD, construct new 3 storey Duplex | — | Open |
| Sep 19, 2025 | Demolition | Proposal to demolish existing 1 storey SFD, construct new 3 storey Duplex | — | Demolition |
| Sep 19, 2025 | Building Permit Related(PS) | Plumbing - Proposal to demolish existing 1 storey SFD, construct new 3 storey Duplex | — | Open |
| Sep 19, 2025 | Building Permit Related (DR) | Drain - Proposal to demolish existing 1 storey SFD, construct new 3 storey Duplex | — | Open |
| Sep 19, 2025 | New Building | Proposal to demolish existing 1 storey SFD, construct new 3 storey Duplex | $900K | New build |
| May 12, 2025 | Accessory Building(s) | Repair work related to the impact damages to the accessory building. | $10K | Open |
| Mar 24, 2025 | Back Water Valve (Sewer only) | back water valve | — | Closed |
| Feb 7, 2025 | Building Permit Related(MS) | HVAC - Proposal for basement interior alterations and second suite. | — | Open |
| Jan 3, 2025 | Building Permit Related (DR) | Drain - Proposal for basement interior alterations and second suite. | — | Open |
| Dec 30, 2024 | Building Permit Related(PS) | Plumbing - Proposal for basement interior alterations and second suite. | — | Open |
| Dec 17, 2024 | Back Water Valve (Sewer only) | Install BWV | — | Open |
| Nov 25, 2024 | Building Permit Related(MS) | Rev 01 - Furnace duct design for all three units.HVAC - Proposal for interior alterations to the basement and ground floors and add a 3rd unit on the 2nd floor with an egress balcony. | — | Open |
| Oct 24, 2024 | Demolition | To demolish existing dwelling and construct a new two storey dwelling | — | Demolition |
| Oct 24, 2024 | Building Permit Related (DR) | Drain - To demolish existing dwelling and construct a new two storey dwelling | — | Open |
| Oct 24, 2024 | Building Permit Related(PS) | Plumbing - To demolish existing dwelling and construct a new two storey dwelling | — | Open |
| Oct 24, 2024 | New Building | To demolish existing dwelling and construct a new two storey dwelling | $550K | New build |
| Sep 25, 2024 | Other(BA) | REV01: Proposed revision as per drawingsProposal to construct a detached carport | — | Open |
| Aug 28, 2024 | Building Permit Related(PS) | Plumbing - To construct a second storey addition, interior alterations, rear deck for two unit dwelling | — | Open |
| Aug 21, 2024 | Building Permit Related(MS) | Revision 01: revised hvac designHVAC - To construct an rear addition and second storey addition and secondary unit in the basement | — | Closed |
| Jul 25, 2024 | Garage | New superstructure for detached garage following a fire (foundation to remain) | $30K | Open |
| Jul 3, 2024 | Building Permit Related(PS) | Plumbing - Proposal for interior alterations to the basement and ground floors and add a 3rd unit on the 2nd floor with an egress balcony. | — | Open |
| Jul 3, 2024 | Interior Alterations | Proposal for interior alterations to the basement and ground floors and add a 3rd unit on the 2nd floor with an egress balcony. | $80K | Open |
| Jun 27, 2024 | Building Permit Related(PS) | Rev 01 - Update powder room to 3 piece bathroom, adding a shower area on the lower floor, updated stair width & revised structural around stair landing.Plumbing - Proposed garden suite. | — | Open |
| Jun 27, 2024 | Building Permit Related(MS) | Rev 01 - Update powder room to 3 piece bathroom, adding a shower area on the lower floor, updated stair width & revised structural around stair landing.HVAC - Proposed garden suite. | — | Open |
| Jun 25, 2024 | New Laneway / Rear Yard Suite | Rev 01 - Update powder room to 3 piece bathroom, adding a shower area on the lower floor, updated stair width & revised structural around stair landing.Proposed garden suite. | — | Open |
| Jun 4, 2024 | Building Permit Related(PS) | Plumbing - Proposal for garden suite. | — | Open |
| Jun 4, 2024 | New Laneway / Rear Yard Suite | Proposal for garden suite. | $250K | Open |
| Jun 4, 2024 | Building Permit Related(MS) | HVAC - Proposal for garden suite. | — | Open |
The 40 most recent of 166 permits on record. Figures come from the City’s active and cleared permit datasets, refreshed daily — what that covers, and what it misses.