Do You Need a Permit for Home Improvements in Montgomery County, MD?
Short answer: In Montgomery County, Maryland, interior alterations, electrical work, additions, decks and garages generally need a permit, and plumbing permits go through WSSC. Cosmetic work, like installing cabinets, laying floor coverings, painting walls, or replacing windows and doors without changing the opening size, most likely does not.
Here is how that plays out for the projects homeowners ask us about most.
Finishing a basement
Turning an unfinished basement into living space counts as an interior alteration, so expect to need a building permit. Any new circuits, outlets or lighting are electrical work, which needs its own permit. Adding a basement bathroom brings in plumbing, which is permitted through WSSC. A permitted, inspected basement also protects you when you sell, because the finished space matches the county's records.
Kitchen and bathroom remodels
Likely no permit: replacing cabinets, new floor coverings, painting and repairing walls, caulking.
Likely needs a permit: moving or removing walls, new electrical circuits or relocated outlets, and moving plumbing fixtures (through WSSC).
Replacing windows and doors
Replacing windows and doors in the same opening, without changing the net clear opening, is on the county's no-permit list. Enlarging an opening or cutting in a new one changes the structure, so it typically needs a permit.
Before you start
Cities with their own rules, such as Rockville and Gaithersburg, and homeowners associations can have extra requirements. Check them as well.
Even work that does not need a permit still has to meet the building code.
Not sure? Call MC 311 at 240-777-0311, or visit the Department of Permitting Services customer service lobby at 2425 Reedie Drive, 7th Floor, in Wheaton, Monday to Friday, 7:30 a.m. to 4 p.m.
Common questions
Do I need a permit to finish my basement in Montgomery County, MD?
Yes, in most cases. Finishing a basement is an interior alteration, and the electrical work involved needs a permit too. Plumbing for a basement bathroom is permitted through WSSC.
Do I need a permit to replace windows in Montgomery County?
Usually not, as long as the new windows fit the existing openings without changing their size or net clear opening.
Do I need a permit to replace kitchen cabinets?
Montgomery County lists installing, repairing or replacing cabinets as work that most likely does not need a permit.
Who pulls the permit, me or the contractor?
You don't have to deal with it. If your job needs a permit, Smart Home Improvement LLC gets it for you as part of the project, based on the work being done.
This article is general information based on Montgomery County's published guidance, not legal advice. Rules can change, so confirm with the county before you start.
Get a free estimate
Planning a basement, kitchen or bathroom project? Smart Home Improvement LLC (MHIC #46217) handles the design and construction across Montgomery County, and if your job needs a permit, we get it for you.
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