Do You Need a Permit for a Bathroom Remodel in Gaithersburg, MD?

July 30, 2026
Remodeled bathroom with marble tile shower, freestanding tub, gold fixtures, and navy double vanity

Permits for a bathroom remodel in Gaithersburg, MD, matter more than most homeowners realize. Understanding Montgomery County's rules before work begins can save you time, money, and serious legal headaches.

When Does a Bathroom Remodel Require a Permit in Montgomery County?

Most renovations that go beyond cosmetic updates require at least one permit. Painting, wallpapering, replacing a faucet, installing countertops, or swapping flooring are generally exempt, provided no structural changes are made. Once your project moves past those basics, permitting requirements kick in quickly.

Plumbing Changes

Any work touching your plumbing lines will likely trigger a permit. New showers, relocated toilets, and new vanity plumbing require a plumbing permit coordinated with WSSC, the Washington Suburban Sanitary Commission. WSSC must complete its own review before the county issues your permit.

Electrical Work

Adding a new exhaust fan, upgrading lighting circuits, or making GFCI updates requires an electrical permit. All electrical work in Montgomery County must be performed by a licensed electrical contractor.

Structural Changes

Moving or removing walls requires a building permit, which covers framing, walls, ceilings, insulation, and any changes to the building's footprint or envelope.

How Do You Apply for a Permit in Montgomery County?

Permits are handled through Montgomery County's Department of Permitting Services. DPS uses an online portal for all submissions. Applications require detailed drawings, specifications, and supporting documentation, along with the appropriate fees. A licensed design-build contractor can manage the entire process on your behalf.

How Long Does Approval Take?

Eligible applications can move through the Fast Track program with a permit issued in three to five days. More complex projects are reviewed within 17 days for adequately prepared applications. For plumbing work, contact WSSC first, as Montgomery County will not conduct its inspection until WSSC's plumbing inspection is complete.

What Happens if You Skip the Permit?

Unpermitted work can result in fines, mandatory demolition, insurance claim denials, and complications when selling your home. Montgomery County's DPS can issue stop-work orders and fines reaching $1,000 or more per violation per day. A buyer's home inspector will also flag unpermitted work, which can derail a sale.

Frequently Asked Questions

  • Do I Need a Permit to Replace My Toilet or Vanity in Gaithersburg?

    Simple fixture replacements in the same location typically do not require a permit. Moving plumbing lines or adding new connections will likely require one.

  • Can My Contractor Pull the Permit for Me?

    Yes. A licensed architect or design-build remodeling company can handle the entire permit process for a fee, often the most efficient path.

  • Does Permit Work Apply to Historic Homes in the Gaithersburg Area?

    It can. Historic Area Work Permits must be obtained before a building permit. Confirm requirements with DPS early if you're near a historic district.

Plan Your Gaithersburg Bathroom Remodel the Right Way

Washingtonian Companies serves Gaithersburg, MD, and the surrounding area with full-service bathroom remodeling, managing every step from design to final inspection. Our team is fully licensed and insured, keeping your project on the right side of county code from day one.

Ready to get started? Contact Washingtonian Companies to discuss your project, or call (301) 215-0275 for your free consultation. You can also find us on Google.