Permits by Project
Do You Need a Permit for Interior doors, trim and hardware?
Of the 10 areas we checked, no permit is needed in 9 and we found no official answer in 1.
Washington, DC
Washington, DC
No permit- When it applies
- 'similar finish work' exempt outside historic districts
- Notes
- Interior doors/trim not named but fall under finish work; changing the opening size = alteration (permit).
Source: DOB How to Get a Permit, checked 2026-10-07
Maryland
Anne Arundel County, MD
No permit- When it applies
- finish work; not a listed permit-required type
Source: I&P Do I need a Permit?, checked 2026-10-07
Charles County, MD
Not confirmed- Notes
- No official answer found.
Ask the Department of Planning and Growth Management.
Montgomery County, MD
No permit- When it applies
- 'Windows and doors without changing the opening size...' = no permit (2024 guide, STALE); trim = finish work
Source: DPS Home Improvements guide (2024) [STALE], checked 2026-10-07
Prince George's County, MD
No permit- When it applies
- 'Replace interior or exterior door N N'
- Notes
- Trim/hardware are finish work not separately listed in the guide.
Source: DPIE Homeowner's Guide to Permits, checked 2026-10-07
Northern Virginia
Arlington County, VA
No permit- When it applies
- USBC 108.2(14.1) doors (similar operation/opening, non-fire-rated) + 108.2(14.9) trim
Source: USBC 13VAC5-63-80 Section 108.2, checked 2026-10-07
City of Alexandria, VA
No permit- When it applies
- USBC 108.2(14.1) + (14.9)
Source: USBC 13VAC5-63-80 Section 108.2, checked 2026-10-07
Fairfax County, VA
No permit- When it applies
- USBC 108.2(14.1) + (14.9)
Source: USBC 13VAC5-63-80 Section 108.2, checked 2026-10-07
Loudoun County, VA
No permit- When it applies
- USBC 108.2(14.1) + (14.9)
Source: USBC 13VAC5-63-80 Section 108.2, checked 2026-10-07
Prince William County, VA
No permit- When it applies
- no structural alteration to openings (permit only 'when structural alterations are made or required')
Source: PWC Do I Need a Permit?, checked 2026-10-07
Summarized from each area’s official permit pages and codes, as of October 2026. Some Maryland municipalities issue their own permits, rules change, and many answers depend on the exact scope, so confirm with the permit office before work starts. This is general information, not legal advice.
Planning a Turnover?
Set the budget from the rent with the planner, then book a walkthrough.