Maryland · Window Replacement · Free 2026 licensing & permit checklist
Window Replacement licensing & permits in Maryland
Before you sign that $window replacement contract, here's the licensing authority, permits required, specialty trades, and verification steps for Maryland in 2026.
Licensing authority
Maryland Home Improvement Commission (MHIC)
MHIC license required for ANY home improvement work on an existing residence. Guaranty Fund covers up to $20,000 per claim.
Permits typically required
- Like-for-like replacement often exempt; building permit required if opening size changes
Maryland permit fees typically run 1-3% of project cost. Don't sign a "no-permit" contract — it shifts every future inspection failure onto you.
Specialty trades required
- No specialty trade typically required for standard replacement
DIY risk: Moderate — typical DIY OK with research. Specialty trades are typically state-licensed even in no-statewide-GC states.
Compare window replacement in Maryland across all lenses
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FAQ — Window Replacement contractor licensing in Maryland
Do I need a licensed contractor for a window replacement in Maryland?
Yes — Maryland requires a statewide contractor license through the Maryland Home Improvement Commission (MHIC) for residential work. MHIC license required for ANY home improvement work on an existing residence. Guaranty Fund covers up to $20,000 per claim. Verify any contractor before signing using the official license-lookup link below.
What permits does a Maryland window replacement require?
Typical permits for a window replacement in Maryland: like-for-like replacement often exempt; building permit required if opening size changes. Permit fees in Maryland typically run 1-3% of project cost. Permits also lock in your inspections — without them, you'll fail any future resale inspection and may face retro-permitting fines.
Which specialty trades need their own license for a window replacement?
For a window replacement: No specialty trade typically required for standard replacement. These specialty licenses (electrician, plumber, HVAC tech) are typically issued at the state level — so even in no-statewide-GC states like Texas or New York, the electrician on your job still needs a state license. DIY risk for this project type: Moderate — typical DIY OK with research.
How do I verify a Maryland contractor before I sign?
Visit the official Maryland license-lookup at https://www.dllr.state.md.us/cgi-bin/electronicSearch/license-result.cgi?type=mhic and search by name or license number. Verify: (1) license is active, (2) license class matches your project scope, (3) no disciplinary actions or recent complaints, (4) bond + insurance are current. If any of these fail, walk away.
After you verify the license
Other projects in Maryland
Disclaimer: This page is informational only and is not legal advice. State licensing rules and thresholds change — always verify against the official Maryland board before signing a contract.