Michigan permit requirements
We have read and dated 40 permit rules across 4 jurisdictions in Michigan. They do not all say the same thing: shed thresholds alone run from 50 to 200 sq ft across 2 of them.
- Jurisdictions
- 4
- Verified rules
- 40
- Permit always required
- 19
- Depends on the project
- 19
Do you need a building permit in Michigan?
Usually it depends on the size of the job, and the size that decides it is not set by Michigan: permits are issued by the city or county, not the state, so the rule that governs your project is the one your own jurisdiction publishes. 19 of those local rules require a permit outright, 19 depend on a size or scope condition the office publishes, and 0 need none. Michigan sets the building code those local rules derive from; your city or county sets the threshold and the fee.
Do Michigan jurisdictions agree?
Every row below is a measurement at least two Michigan jurisdictions publish, compared against each other. This is the question a statewide answer cannot settle, because the number that governs your project is the one your own city or county publishes.
| Project | Published threshold | Jurisdictions | Agreement |
|---|---|---|---|
| Shed | 50 to 200 sq ft | 2 | 2 different numbers |
| Deck | 200 sq ft | 2 | Same number in all 2 |
| Pool | 24 inches | 2 | Same number in all 2 |
2 of 3 comparable measurements are uniform across Michigan; 1 is not. Latest verification 2026-08-15.
Where Michigan jurisdictions split
The verdict for each project across the 4 Michigan jurisdictions we cover. On 8 of 10 projects they do not give the same answer, which is why a statewide answer is not one.
| Project | Permit required | Depends | No permit | Across the state |
|---|---|---|---|---|
| Deck | 2 | 2 | Answer varies | |
| Electrical | 1 | 3 | Answer varies | |
| Fence | 3 | 1 | Answer varies | |
| HVAC | 2 | 2 | Answer varies | |
| Plumbing | 2 | 2 | Answer varies | |
| Pool | 1 | 3 | Answer varies | |
| Roof Replacement | 2 | 2 | Answer varies | |
| Shed | 2 | 2 | Answer varies | |
| Solar | 4 | Same answer everywhere | ||
| Patio | 2 | Same answer everywhere |
Building without a permit in Michigan
Michigan sets the penalty in state law, not by local ordinance alone. Under section 23 of the Stille-DeRossett-Hale Single State Construction Code Act (1972 PA 230), knowingly violating the act, the state construction code, or an enforcement rule is a misdemeanor punishable by a fine of not more than $500, imprisonment for not more than 90 days, or both.
Penalties, the as-built path, and what the statute actually says
What you can build without a permit in Michigan
0 of the 38 answered rules across Michigan need no permit at all and 19 turn on a size or scope condition the jurisdiction publishes, by project and jurisdiction, in each office's own words.
What a permit costs in Michigan
There is no single Michigan permit fee. Each jurisdiction in Michigan sets and publishes its own, and they do not use the same pricing model, so the figure that applies to your project is the one your own city or county publishes. Below is every Michigan project where we have quoted one, verbatim, from the office's own schedule.
| Project in Michigan | Jurisdictions publishing a fee |
|---|---|
| Deck | 4 |
| Electrical | 4 |
| Fence | 4 |
| HVAC | 4 |
| Plumbing | 4 |
| Pool | 4 |
| Roof Replacement | 4 |
| Shed | 4 |
| Solar | 4 |
Each row links to the Michigan table carrying every quoted fee, its source and its verification date. We do not publish a Michigan average: the notes mix flat minimums, valuation percentages and per-fixture charges, so an average would be a number no office charges.
What each Michigan jurisdiction publishes
One line per jurisdiction, written from its own rules rather than from a state summary. This is the section that used to be a list of links, and the states with the fewest jurisdictions to compare are the ones it says the most about.
- Ann Arbor 10 rules
8 of 10 projects always need a permit and 2 turn on the size or scope of the work. The ones that depend on the project are patio and roof replacement.
- Detroit 10 rules
1 of 9 projects always need a permit and 8 turn on the size or scope of the work. Only solar work always needs one. Published thresholds include deck at 200 sq ft and fence at 7 feet. 1 question is unresolved because the jurisdiction publishes no answer.
- Grand Rapids 10 rules
4 of 9 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, electrical, HVAC, plumbing and pool. Published thresholds include deck at 200 sq ft and pool at 24 inches. 1 question is unresolved because the jurisdiction publishes no answer.
- Sterling Heights 10 rules
6 of 10 projects always need a permit and 4 turn on the size or scope of the work. The ones that depend on the project are electrical, patio, pool and shed. Published thresholds include shed at 50 sq ft and pool at 24 inches in side wall height.