Mast Construction LLC

Permits are pulled before work begins and then inspected by the county. A contractor who files them is working inside a system with an inspector in it, which is what unpermitted work avoids.

What the permits show

Of the permits we observed, 43% are deck & patio work.

Deck & Patio 10

Plumbing 6

Interior 3

Structural 3

Accessory Structure 1

Each county's permit system holds only their own records, so the combined view above exists nowhere else.

Recent work

• Structural addition
  September 2026 · Frederick County

  Add a 2-story 26' x 22' addition.

• Roof replacement
  August 2026 · Frederick County

  Breezeway: install roof over rear stairs with windows on the side opposite the garage, to create an enclosed breezeway.

• Deck repair
  April 2026 · Frederick County

  Deck Repairs

• Interior work
  December 2025 · Howard County

  Move washer and dryer to another room parrallel to the existing laundry room.

• New deck
  October 2025 · Howard County

  SFD/ DEMO GARAGE DOOR AND ROOF FRAMING INCLUDING ELECTRICAL LINES. INSTALL NEW BEAMS, POSTS, AND RAFTERS WITH NEW ROOF,…

• New garage
  September 2025 · Howard County

  SFD/ CONSTRUCT 24' 30' DETACHED GARAGE, 1 STORY, Slab on Grade, 0R, 0FB, 0HB, 0FP, OTHER STRUCTURE = Detached Garage, 0…

• Interior addition
  July 2025 · Frederick County

  16'x26' addition to include a new bedroom and bathroom.*7/28/25 - Applicant provided updated plot plan showing centerli…

• Bathroom renovation
  March 2025 · Howard County

  SFD/ EXISTING IN-LAW SUITE ON 1ST FLOOR RENOVATIONS TO INCLUDE: TUB TO SHOWER, REMOVAL OF CLOSET TO INPUT WASHER/DRYER,…

• Kitchen renovation
  December 2024 · Howard County

  Sfd/first floor kitchen renovation to include removing non-load bearing half wall behind the sink and relocating the is…

• Permit filed
  September 2024 · Frederick County

  Adding new windows to match with windows in the morning room and master bedroom, with same size according to room. Bump…

Licensing

• Maryland Home Improvement Commission Issued by Maryland Department of Labor. Verify

Towns we observed them working in

We hold permit records for Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC. Work anywhere else is not missing from this contractor's record, it is outside what we cover.

Permits by year

Our records for this contractor's counties begin August 2021. Years before that are not shown because we hold nothing for them, not because nothing happened.

What this page is, and is not

• Frederick County: 16 permits observed, from records beginning August 2021.
• Howard County: 10 permits observed, from records beginning August 2021.

This page shows permits we observed in county records. Our observation is not complete: work done before those dates, in counties we do not cover, or on filings that name no contractor does not appear here. A contractor's real work is almost always greater than what we observed, and absence of a permit on this page does not mean the work was not done or not permitted. We currently hold records for Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC; see permit coverage for what that includes.

Common questions

Does a permit record mean this contractor is licensed?

County permit records list Mast Construction LLC under Maryland Home Improvement Commission. Check current standing with the issuing body before hiring.

Why do some contractors show more permits than others?

Counties began publishing at different times and describe contractors differently, so the number reflects what we observed as much as what the contractor did. It is not a ranking.

What should I still ask for?

Proof of insurance, a written contract, and the license number for the trade being performed. A permit record is a starting point, not a substitute for either.

Other Deck & Patio contractors in Frederick County