DDA Construction takes on general home remodeling in Montgomery County, Washington DC and Northern Virginia, including interior renovations, removing or opening walls, adding or enlarging door and window openings, framing, drywall, trim and finish carpentry, and painting. Because the company specializes in doors and windows, it is often hired for remodels that change how a room connects to the outside.
| Service | General home remodeling |
|---|---|
| Scope | Interior renovations, wall openings, framing, drywall, trim, finish carpentry, painting |
| Strength | Projects that add or change doors and windows |
| Area | Montgomery County MD, Washington DC, Northern Virginia |
What we take on
- Interior renovations: layout changes, new walls and closets, drywall and plaster repair.
- Opening walls: removing or widening walls, with a new beam where the wall carries load.
- New and larger openings: windows turned into doors, new windows, wider entries. See window-to-door conversions.
- Finish carpentry: interior doors, casing, baseboard, window stools and millwork.
- Exterior repairs around openings: rotted trim, sills and siding patches after a door or window change.
- Painting: interior and exterior. See painting services.
When a remodel touches electrical, plumbing or HVAC, those trades are separately licensed in Maryland and Virginia and need their own permits.
How a remodel runs
Every project follows the same order, even if some steps are short. Knowing the order helps you plan around the work and makes it clear what happens when. Throughout the project we clean up at the end of every workday, and at the end we recommend a professional post-construction clean.
Permits in Montgomery County
Montgomery County's Department of Permitting Services lists painting, wall repair, floor coverings and cabinets among work that generally doesn't need a permit, and lists interior alterations among work that does. Replacing windows and doors without changing the opening size doesn't need a building permit; making an opening bigger or cutting a new one does. Rockville and Gaithersburg issue their own permits, and historic districts and HOAs can add review. We check the rules for your address before work starts.
| Work | Montgomery County permit? |
|---|---|
| Painting, wall repair | Generally no |
| Floor coverings, cabinets | Generally no |
| Same-size window or door replacement | Generally no |
| Interior alterations | Yes |
| Enlarging an opening or adding a new one | Yes |
Licensing to ask about
In Maryland, home improvement contractors working for homeowners must hold a license from the Maryland Home Improvement Commission (MHIC). In Virginia, contractors need a license from DPOR for jobs over $1,000. In homes built before 1978, any firm paid to disturb paint must be certified under the EPA's Renovation, Repair and Painting (RRP) rule. Ask any contractor for these numbers and look them up.
Questions
Do I need a permit to remove a wall?
In Montgomery County interior alterations need a permit, and removing a load-bearing wall also needs a properly sized beam, often designed by an engineer. Check with your permit office, which is the county DPS or the city in Rockville or Gaithersburg.
Can you turn a window into a door as part of a remodel?
Yes. It's one of the most common projects we do. It needs a permit because the opening size changes.
Do you handle kitchen and bathroom remodels?
We handle the carpentry, openings, drywall, trim and paint in those rooms. Plumbing and electrical work is done by separately licensed trades with their own permits.
Is my house old enough for lead-safe rules?
If it was built before 1978, the EPA RRP rule applies to work that disturbs painted surfaces, and window replacement is always covered.
Who cleans up after the remodel?
We clean up at the end of every workday. When the project is finished we recommend a professional post-construction clean with HEPA equipment by an insured company. See our post-construction cleanup page.
Sources
- Montgomery County DPS: Home improvements, permit or no permit
- Maryland Home Improvement Commission (MHIC)
- Virginia DPOR Board for Contractors
- US EPA: Renovation, Repair and Painting (RRP) Program for contractors
Written and reviewed by DDA Construction · Updated September 2026