Thunder Bay building permits: 70 filed in the last 30 days
Thunder Bay filed 70 building permits in the 30 days to 2026-05-13, up 55.6% on the 45 filed in the preceding 30 days. The busiest category was Plumbing System Only - Single Detached Dwelling with 25 permits, followed by Demolition - Detached Garage with 11. Median declared project value was $6,000. Across the trailing 12 months Thunder Bay filed 958 permits, and June 2025 was the busiest month at 124. The Thunder Bay feed does not name a contractor on its permit records, so no contractor ranking is published here.
Top permit types, last 12 months
| Plumbing System Only - Single Detached Dwelling | 366 |
| Addition/Alteration - Single Detached Dwelling | 91 |
| New - Detached Garage | 56 |
| New - Single Detached Dwelling | 33 |
| Demolition - Detached Garage | 31 |
Most active contractors, last 12 months
| The Thunder Bay feed does not name contractors on its permit records. |
Monthly filings, trailing 12 months
How to look up a building permit in Thunder Bay
Thunder Bay publishes its permit records itself, on a ArcGIS FeatureServer open-data endpoint at services5.arcgis.com, in the dataset "Building Permits". That feed is the source this page reads, so a record here can be checked against the city's own copy. Search by civic address first, then confirm the permit number and the issue date. Records the city has not yet published will not appear in either place.
Van Permit Audit holds 14,723 Thunder Bay permit records, current to 2026-05-13. See the full Thunder Bay lookup guide for the step by step.
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$97 CAD per monthRelated municipalities
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- Ottawa, ON 1,034 permits in its latest 30 day window
- Mississauga, ON 98 permits in its latest 30 day window
How to look up a building permit in Thunder Bay | All permit data
Data: 14,723 Thunder Bay permits, part of 3,176,874 records from 32 municipal open-data feeds, refreshed 2026-09-30. Window measured to 2026-05-13, the latest filed date Thunder Bay has published. Citation: "Source: Van Permit Audit (vanpermitaudit.ca)."