{"name":"BuildRules permit index: Hamilton","canonical_url":"https://buildrules.ca/permit-index/hamilton","generated_at":"2026-10-07T08:26:10.237Z","latest_verified":"2026-10-01","coverage":{"cities":1,"project_types":12,"city_project_answers":12,"official_source_urls":6},"methodology_url":"https://buildrules.ca/methodology","source_directory_url":"https://buildrules.ca/sources","records":[{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Additional dwelling unit","project_slug":"secondary-suite-permit","question":"What permits and checks apply to an ADU or basement apartment in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Hamilton has a dedicated ADU team for building permits in existing single-family dwellings, including up to two internal units and one detached unit.","last_verified":"2026-10-01","official_source_count":2,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/additional-dwelling-units"],"buildrules_url":"https://buildrules.ca/hamilton/secondary-suite-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Basement entrance / walkout","project_slug":"basement-entrance-permit","question":"Do you need a permit for a basement walkout in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Yes. Hamilton explicitly lists a walkout basement among interior projects that require a building permit.","last_verified":"2026-10-01","official_source_count":2,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit-review"],"buildrules_url":"https://buildrules.ca/hamilton/basement-entrance-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Basement renovation","project_slug":"basement-renovation-permit","question":"Do you need a permit to renovate a basement in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Hamilton lists finishing or partially finishing a basement, creating new rooms and many structural or opening changes among permit-required interior work.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/basement-renovation-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Basement underpinning","project_slug":"underpinning-permit","question":"Do you need a permit for underpinning in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Yes. Hamilton lists raising or lowering a house through underpinning to provide a full basement as permit-required work.","last_verified":"2026-10-01","official_source_count":3,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit-review","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit-fees"],"buildrules_url":"https://buildrules.ca/hamilton/underpinning-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Deck","project_slug":"deck-permit","question":"Do you need a permit for a deck in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Hamilton requires permits for attached decks and several detached-deck situations based on area, height, roof coverage and access.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/porches-and-decks"],"buildrules_url":"https://buildrules.ca/hamilton/deck-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Garage / carport","project_slug":"garage-permit","question":"Do you need a permit for a garage or carport in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"A qualifying detached garage or carport accessory to a house can be permit-exempt when it is no more than 15 m², one storey and has no plumbing.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/garage-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Home addition","project_slug":"home-addition-permit","question":"Do you need a permit for a home addition in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Yes. Hamilton lists additions, including enclosing an existing porch, among projects that require a building permit.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/home-addition-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Plumbing","project_slug":"plumbing-permit","question":"When do you need a plumbing permit in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Hamilton requires a building permit for plumbing work inside buildings, and plumbing/drainage systems are reviewed under the Building Code.","last_verified":"2026-10-01","official_source_count":3,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit-review","https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit-fees"],"buildrules_url":"https://buildrules.ca/hamilton/plumbing-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Roof replacement","project_slug":"roof-replacement-permit","question":"Do you need a permit to replace a roof in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Re-shingling with the same roofing material is permit-exempt; replacing roofing with a different material is listed as permit-required.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/roof-replacement-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Shed / accessory structure","project_slug":"shed-permit","question":"Do you need a permit for a shed in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"For an accessory structure to a detached, semi-detached or row house, Hamilton lists a permit exemption when the detached structure is no more than 15 m², one storey and has no plumbing.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/residential-accessory"],"buildrules_url":"https://buildrules.ca/hamilton/shed-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Solar panels","project_slug":"solar-panel-permit","question":"Do you need a building permit for solar panels in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Yes. Hamilton lists solar panels among exterior projects that require a building permit.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/solar-panel-permit"},{"city":"Hamilton","city_slug":"hamilton","province":"Ontario","project":"Windows / doors","project_slug":"window-door-permit","question":"Do you need a permit for window or door changes in Hamilton?","guidance_status":"Depends on project conditions","direct_answer":"Hamilton lists creating new window or door openings, increasing opening size and relocating openings as permit-required work.","last_verified":"2026-10-01","official_source_count":1,"official_source_urls":["https://www.hamilton.ca/build-invest-grow/construction-renovation/residential-building-renovation/building-permit"],"buildrules_url":"https://buildrules.ca/hamilton/window-door-permit"}]}