Plumbing permits · Maryland

Where Maryland repipes and re-plumbs, permit by permit.

Water heaters, repipes, and fixture work are permitted job by job, each naming the firm that filed it. Tradewinds observes them in county permit records, tied to the property behind each filing.

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What the plumbing permit record shows.
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Water heater replacement

The most common filing in the trade, and the moment a heat pump water heater is a live option rather than a pitch.

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Whole-house repipes

A repipe is a large committed spend on an older house, and it opens walls that other trades are then in.

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Fixture and bath work

Bath fixture permits travel with interior remodel filings on the same parcel, often within weeks.

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Who files the volume

Filings name the plumbing firm, so a county's active shops and their relative volume are countable.

152423
plumbing permits observed in Maryland, since January 2019

By county

Baltimore 48548
Baltimore City 35801
Howard 30401
Frederick 23731
Carroll 8808
Anne Arundel 5093
Prince George's 41

By year

2019 3680
2020 3515
2021 11403
2022 26568
2023 26369
2024 27719
2025 28187
2026 24982
Contractors on record, by county

Every firm below filed permits we observed in that county. Counts are what we hold, so they reflect our coverage as much as the work happening there.

All Maryland plumbing contractors

Other trades in Maryland

Plumbing in other states

See last week's activity, free

Every Monday we publish last week's plumbing permits for every county we cover. Browse this week's activity.

Working in Maryland?

Tell us your territory and we will bring the data to the first call. See the counties and trades we cover on the coverage page, or the firms doing this work in the contractor registry.

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Built from county permit filings. Not every filing names a trade cleanly, and counties differ in what they publish, so these counts reflect our coverage as much as the work happening on the ground.