Planning & Checklists
When Carpentry Work Needs a Permit
Updated 2 min read
The short answer
Cabinetry fastened to existing walls does not normally require a permit. Permits become relevant once work involves structure, new or altered electrical, plumbing, gas, or a basement development. Each municipality administers its own — Calgary, Airdrie, Chestermere, Cochrane, Okotoks, High River and Rocky View County all have separate processes and requirements.
Typically permitted vs typically not
General guidance only. Requirements change and vary by municipality — always confirm with your local authority, which is the only body that can answer definitively.
| Work | Usually needs a permit? |
|---|---|
| Installing built-ins on existing walls | No |
| Replacing trim, baseboards, casing | No |
| Replacing interior doors in existing openings | No |
| Replacing kitchen cabinets, same layout, no services moved | No |
| Adding or moving electrical circuits | Yes — and a licensed electrician |
| Adding or moving plumbing | Yes — and a licensed plumber |
| Any gas appliance work | Yes — and a licensed gas fitter |
| Finishing a basement | Yes |
| Creating a secondary suite | Yes — with extensive additional requirements |
| Removing or altering a wall | Yes if structural |
| Cutting a new egress window | Yes |
| Installing a pocket door in a load-bearing wall | Yes |
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Why unpermitted work is a genuine problem
- It surfaces at sale
- Buyers and their lawyers ask. Unpermitted development can delay or derail a sale, or force a price reduction.
- It can affect insurance
- An insurer may decline a claim arising from unpermitted work. This is the risk people most underestimate.
- It may have to be opened up
- Retroactive permitting can require finished work to be exposed for inspection.
- Safety requirements exist for reasons
- Egress, fire separation and electrical standards in basements are about people getting out of a burning building.
- Your contractor may not carry the risk
- A trade who suggests skipping a permit is transferring liability to you, the homeowner.
Answers
Frequently asked questions
- Do I need a permit to install built-in cabinetry?
- Not normally, if it is simply fastened to existing walls with no changes to structure or services. If the design includes new electrical for lighting, or forms part of a basement development, a permit becomes relevant. We tell you clearly when a project crosses that line.
- Who pulls the permit — me or the contractor?
- It varies by project and municipality. For larger work a general contractor typically holds it; for smaller work the homeowner sometimes does. What matters is that it is explicitly agreed in writing before work starts, because "I assumed you were doing it" is a genuinely common and expensive misunderstanding.
- What if my basement was finished without a permit before I bought the house?
- It is worth addressing rather than ignoring, since it will surface when you sell. Your municipality can advise on retroactive permitting, which may require exposing some finished work for inspection. Unpleasant, but far less so than discovering it during a sale.
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