Assume a permit is required whenever the work is structural, or touches electrical, plumbing or gas, or changes how the building is used. Those are the categories nearly every jurisdiction regulates, because that is the work that hurts people when it is done wrong. Who pulls it matters as much as whether one is needed. The permit holder carries the responsibility for code compliance, so a contractor asking the homeowner to pull it is quietly moving risk onto the person least able to hold it. Permit rules are set locally, and a ten-minute call to your building department beats every rule of thumb in this article.
It happens at the kitchen table, usually after the price has landed well. The client glances toward the hallway as if someone might be listening, leans in a little, and asks the question in the tone people reserve for asking about it: "Do we actually need the permit? My neighbor did his whole basement without one."
There is a pause built into that moment, and both of you know what lives in it. A faster start. A slightly smaller number. No inspector walking through with a flashlight. The client thinks they are asking a scheduling question. They are actually asking you to quietly take on a risk they do not understand, attached to your license and your insurance rather than theirs.
This article is about how to answer, and about the machinery behind the answer: what generally needs a permit, who is supposed to pull it, and what unpermitted work actually costs, years later, to people who thought they had gotten away with it. One thing before anything else: permit rules are set locally. Provinces and states set the framework; municipalities decide the specifics, the exemptions, and the fees. Everything below is the general pattern across Canada and the US. The only authority for your job is your local building department, and a ten-minute phone call to them beats every rule of thumb in this article.
What generally triggers a permit
The pattern across most jurisdictions is consistent even where the details differ. Permits attach to work that can hurt someone or compromise the building if done wrong, which is why the categories look the way they do.
Structural work. Removing or modifying load-bearing walls, cutting into joists or rafters, additions, dormers, decks above a certain height or size, new window or door openings in exterior walls. If it carries load or changes how load travels, assume a permit until told otherwise.
Electrical. New circuits, panel upgrades, service changes, and substantial rewiring almost always require a permit or its equivalent. In some places (much of Canada, for instance) electrical work runs through a separate electrical authority with its own permit and inspection stream rather than the building department. Like-for-like fixture and device swaps are commonly exempt, but the line sits in different places in different towns.
Plumbing. Moving or adding fixtures, altering drain, waste, and vent piping, water service work. Replacing a faucet is generally fine; moving the sink across the room generally is not.
Gas and mechanical. Gas lines, appliance connections, furnace and boiler replacements, new ductwork, fireplaces. Gas work is the least forgiving category on this list, and most jurisdictions treat it that way: licensed installers, permits, inspections, with little tolerance for shortcuts.
Change of use and secondary suites. Turning a basement into a legal rental unit, a garage into living space, a house into a duplex. These trigger a cluster of requirements (fire separation, egress, ceiling heights, sometimes parking), which is exactly why so many are done without permits, and why they are the single most common category of retroactive-permit misery.
What generally does not need one: painting, flooring, cabinet replacement in the same layout, trim, like-for-like fixture swaps, ordinary roofing repairs in many places (full re-roofs vary), fences and small sheds under local size thresholds. But "generally" is doing work in that sentence. Municipalities publish exemption lists precisely because the boundary is local. When a job sits near the line, call. Building departments answer this question all day and would much rather answer it before the drywall is up.
Who is supposed to pull the permit?
Either the property owner or the contractor can usually apply, with a wrinkle: trade permits for electrical, plumbing, and gas often must be pulled by the licensed trade doing the work. And in many places, an owner pulling their own permit signs a declaration taking responsibility for code compliance themselves.
The professional reality is that the permit holder owns the relationship with the inspector and the responsibility for compliance. When a contractor asks the homeowner to pull the permit "to keep it simple," one of two things is happening. Either it genuinely is simpler for a minor job, or the contractor is not licensed to pull it, which the client deserves to know before hiring them. As the contractor, pulling the permit yourself signals the opposite: you are licensed, you are insured, you expect to pass inspection, and you are not arranging for someone else to hold the liability for your work.
Fold the process into the job like any other line item. Permit fees are real money (commonly a few hundred dollars on small residential work, scaling with construction value), and inspections shape the schedule: typically a rough-in inspection before anything is covered, and a final. The classic scheduling failure is closing walls before rough-in passes; an inspector is fully entitled to have you open them again. Build the inspection points into the timeline you show the client, so a two-day wait for an inspector is part of the plan rather than a surprise.
What does skipping a permit actually cost?
The pitch for skipping a permit is always about the next six weeks. The bill arrives on a different schedule.
At sale. This is where most unpermitted work surfaces. A buyer's inspector notices a basement bathroom that does not appear on any permit record; the buyer's lawyer or agent runs a permit search; and suddenly the seller is negotiating from underneath. The options at that point are all bad: a price cut sized to the buyer's fear rather than the work's value, a retroactive permit process on the municipality's terms, or a collapsed deal. Retroactive permitting is the expensive version of the original permit. Inspectors cannot see inside finished walls, so they are entitled to require opening them, and the work is then judged against current code, not the code of whenever it was done. A wall that would have passed rough-in for the cost of a drywall delay now costs demolition, re-inspection, and re-finishing.
At claim time. Insurance policies are contracts, and insurers read them carefully after a loss. A fire traced to an unpermitted, uninspected electrical alteration, or water damage from unpermitted plumbing, gives the insurer an argument to deny or reduce the claim. It does not always succeed. But "sometimes the six-figure claim gets denied" is not a risk any client would knowingly buy for the price of a permit. They just never priced it, because nobody told them that was the trade.
During the work. Municipalities notice. Neighbors notice louder: a renovation next door with no permit in the window is one grievance away from a phone call. A stop-work order freezes the site while the paperwork catches up, on the municipality's timeline, with fines in many places and every subsequent inspection conducted by someone whose first impression of you is the contractor who tried to slide one past them. Inspectors talk to each other, and you will be working in their town next year too.
For you specifically. The client who asked you to skip the permit will not be at the hearing if a licensing body asks why licensed work happened without one. Your license, your liability coverage, your lien rights if the job goes sideways: in some jurisdictions, courts have been unsympathetic to contractors trying to collect on work performed illegally. You are betting your business to save your client a permit fee. Written out like that, nobody would take the bet.
The client who asks you to skip it
Back to the kitchen table. The wrong answer is a lecture, and the second-worst answer is a mumbled maybe. The client is not a criminal; they are repeating something a neighbor told them and probing whether the permit is a real requirement or contractor padding. Answer as if they asked a reasonable question, close the door completely, and hand them a benefit in the same breath:
"I hear you, but I can't build it without the permit. It's my license on the line, not just the schedule, and unpermitted work will bite you at sale time or on an insurance claim, which is a much bigger bill than the permit. Here's what I can do: I handle the whole thing. The application, the drawings, booking every inspection. And I build the timeline around it so it costs you nothing but a line item. You never think about it again, and when you sell this house, the basement is an asset instead of a disclosure problem."
Notice what that does. It makes refusal about facts rather than virtue, it converts the permit from an obstacle into a service you provide, and it quietly reframes the sale-day consequence as the client's own money at stake, which it is. Most clients drop the request on the spot, a little relieved someone finally explained it.
The rare client who keeps pushing after that has told you something important about every future disagreement on this job, including the ones about paying you. Walking away from that job is not lost revenue. It is avoided cost.
Make the permit part of the product
The contractors who never have awkward permit conversations are the ones who never present it as optional. The permit appears in the Quote as its own line, the inspection points appear in the schedule, and the client's first exposure to the topic is you handling it. A few habits that make this cheap:
- Quote it explicitly. A "permits and inspections" line item, priced honestly, reads as competence. Burying it invites the exact conversation you are trying to avoid.
- Photograph everything before it closes. Rough-in photos of framing, wiring, and plumbing, timestamped and filed per job, are gold at inspection time, at callback time, and years later when someone asks what is inside that wall.
- Keep the paper together. Permit numbers, inspection results, and approved drawings belong with the job record, and a copy of the final sign-off belongs with the client's closing package. It is the document their future selves will need at sale time, and handing it over unprompted is the kind of finish people remember.
Zeus helps with the record-keeping half of this. Rough-in photos taken from inside the job's Photos tab file themselves against that job, and anything shot to the camera roll gets matched back by GPS and date for you to confirm, so those shots are findable under the job two years later instead of lost between kid pictures. Inspections with checklists you build and save yourself let you run a pre-inspection walk before the real one. And the job's day log keeps a dated entry, with the crew on it, for what happened each day, which on any job an inspector visits is exactly the trail you want. Zeus does not file your permit application; the building department is still a phone call. It just means that when anyone asks what was done and when, you answer from a record instead of a memory.
Frequently asked questions
Can the homeowner pull the permit instead of me?
Often yes for building permits, though many jurisdictions require electrical, plumbing, and gas permits to be pulled by the licensed trade performing the work. Be aware of what an owner permit means: the owner typically signs on as the party responsible for code compliance. If you are doing the work, that arrangement mostly shifts your liability onto someone less equipped to hold it, and it can signal to a careful client that a contractor is avoiding the counter for a reason. When you are licensed to pull it, pull it.
A client wants me to finish work someone else started without a permit. Now what?
Get it legalized before you touch it. Have the client contact the building department about a retroactive permit, expect some opening of finished surfaces so rough-in can be inspected, and quote your work from that inspected baseline. Continuing on top of undocumented work makes you the last licensed name attached to all of it, including the parts you cannot see and did not build.
Will pulling permits raise my client's property taxes?
It can, and it is the honest answer to give: permits for additions and major improvements feed assessment data in many places, and value-adding work may raise the assessed value. The framing that is also true: the alternative is not avoiding the tax but hiding the improvement, which resurfaces at sale time as unpermitted work, a worse problem than the incremental tax. Say it plainly and let the client weigh it.
How long does a permit take?
Anywhere from same-day over the counter for simple trade permits to several weeks for anything needing plan review (additions, structural changes, suites) and longer in busy seasons or busy municipalities. This is why the permit conversation belongs at Quote time, not the week before mobilization. Apply early and the review clock runs while you finish other jobs, so the permit is waiting when you are.
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