| Building permit history | Municipality (city, town, county, or regional office) | That a permit was issued for a described scope on a date, and whether inspections were finalised. | That the work matches the permit today, or that unpermitted work does not exist. |
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| Electrical permit or certificate | Provincial safety authority or the municipality, depending on jurisdiction | That electrical work was declared and inspected under that permit. | The condition of circuits not covered by that permit, including anything original. |
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| Gas or heating appliance record | Provincial safety authority, utility, or servicing contractor | Installation and, sometimes, service events for the appliance. | Current safe operation. That requires a licensed technician's present-day assessment. |
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| Contractor licence status | Provincial regulator or licensing body | Whether a contractor holds a current licence, and often its class. | Workmanship quality, or licence status at the time of past work unless the register shows history. |
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| Seller documentation | Seller | Invoices, warranties and reports that can corroborate a claimed upgrade. | Anything the seller did not keep. Absence is a gap, not evidence either way. |
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| Insurer underwriting answer | The specific insurer | Whether that insurer will quote this address, and on what conditions. | How any other insurer will treat the property, or whether the property is safe. |
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