Do you need a plumbing permit in Maryland?
By Mario Bailey Last checked
- Always required
- 3
- of 4 jurisdictions
- Conditional
- 1
- depends on size or scope
- Not required
- 0
- exempt outright
Plumbing Permit rules nationwide, beyond Maryland.
Requirements and size thresholds for plumbing permits vary by locality. The table below compares what each Maryland county or city requires. Always confirm with the local office before starting.
Comparing states? See plumbing permit rules across every locality we cover.
The application steps and inspection sequence for plumbing permits come from the model code rather than from Maryland law, so they read the same wherever you build. We keep that walkthrough in one place: how a plumbing permit application and its inspections work, start to finish. What changes between Maryland jurisdictions is below: who requires a permit, what they charge, and which office you file with.
Swipe sideways to see thresholds and confidence.
| Locality | Permit required? | Typical threshold | Confidence |
|---|---|---|---|
| Baltimore County | Yes | Not specified | Confirmed on official page |
| Howard County | Yes | Not specified | Confirmed on official page |
| Montgomery County | Yes | Not specified | From an official source |
| Prince George's County | Conditional | Not specified | Confirmed on official page |
| No localities match your filter. | |||
Common questions about plumbing permits in Maryland
- Do I need a plumbing permit in Maryland?
- In most of Maryland, yes. Permits are issued locally, so the answer comes from your Maryland city or county rather than a single statewide rule. Of the 4 Maryland jurisdictions we have verified for plumbing work, 3 require a permit outright, 1 depends on the size or scope of the job, and 0 require none.
- Is there a plumbing permit exemption in Maryland?
- 1 of the 4 Maryland jurisdictions we cover sets a threshold rather than a flat rule, so the same job can be exempt in one Maryland county and permitted in the next. The table above lists each Maryland jurisdiction's published threshold in its own words, with the source and the date we verified it.
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