Do I need a permit for that? A homeowner's guide to when work is inspected

Almost every homeowner considering a project asks some version of this, usually hoping the answer is no. Permits add time, they add a modest fee, and they introduce an inspector into a project that felt like a private matter between you and your contractor. It is entirely understandable to want to skip them, and it is nearly always a bad trade.

The rough dividing line

Cosmetic work generally does not need a permit. Painting, flooring, replacing cabinets and counters in place, swapping a tap or a light fixture for a like-for-like unit, and most landscaping sit comfortably on the no-permit side. You cross into permit territory when you alter structure, add or relocate plumbing or electrical, change the building envelope, or change how a space is used. That last one catches the most people out — finishing a basement or converting a garage into living space is a change of use even when nothing structural moves, and it is inspected accordingly.

The specific triggers worth knowing

Removing or altering a wall, because whether it is load-bearing determines everything that follows. Adding a circuit or changing the electrical panel. Moving a drain or adding a fixture. Replacing a water heater, which surprises people but involves gas or high-amperage electrical, venting and pressure relief. Re-roofing, in most jurisdictions. Adding a deck above a certain height. Windows, where the opening is enlarged or an egress requirement applies. The list varies by jurisdiction and changes over time, which is the actual answer to the question in the title: check with your local building department for your specific address. It takes one phone call and it is free.

Who should pull it

Your contractor, under their own licence. This matters more than it sounds. When a contractor pulls the permit, they carry responsibility for the work meeting code, and the inspection record attaches to their licence. When a contractor asks you to pull it as an owner-builder, they are moving that liability to you. You become the responsible party for code compliance, your recourse narrows considerably if the work is defective, and in many places you take on obligations you may not realise. It is occasionally legitimate on genuinely small jobs. On anything substantial, a contractor pushing you to pull the permit is telling you something.

What unpermitted work actually costs you

Not usually a fine, though that can happen. The real costs arrive later and in three places. At resale, an inspector or an appraiser notices work that does not appear in permit records, and the buyer's lender may require it be permitted retroactively — which can mean opening finished walls so an inspector can see what is behind them. That is expensive and it happens at the worst possible moment. At claim time, an insurer investigating a fire or water damage looks at whether the relevant work was permitted. Unpermitted electrical work near the origin of a fire is exactly the detail that complicates a claim. And in the work itself. Inspections catch real problems — a missing ground, an undersized beam, a vent terminating in a wall cavity. A contractor who knows an inspector is coming builds differently from one who knows nobody will look.

What the process is actually like

Less adversarial than people expect. For routine residential work the permit is often issued over the counter or online, the fee is a small fraction of project cost, and inspections happen at defined stages — footings, rough-in, final. The genuine cost is schedule rather than money. Inspection availability sets the pace of the middle of a project, and a contractor who has not built inspection windows into the timeline will be late. That is worth asking about before work starts.

Retroactive permits when work is already done

If you have discovered unpermitted work — often when buying a house — it can usually be permitted after the fact, though the process is less pleasant. It may require exposing concealed work for inspection, engineering assessment of anything structural, and bringing the work up to current code rather than the code in force when it was built. It is worth doing anyway. The alternative is carrying the problem to your own resale, where the same conversation happens with less negotiating room.

The short version

If the project touches structure, plumbing, electrical, the building envelope, or how a room is used, assume a permit is needed and confirm with your local building department. Have your contractor pull it. Treat a contractor who wants to avoid the process as a contractor telling you how they intend to build.