Deck Builders in Maryland: MD Deck Costs, Permits and a Faster Way to Build

Maryland homeowners can hire an MHIC-licensed deck contractor, build from raw lumber themselves, or order an A-DIY engineered deck kit. The kit arrives at your door as a complete system, and you, a friend or a local handyman can assemble it in a few hours with nothing more than a drill.

Contractor pricing in Maryland moves with the deck’s size, the decking material, the height above grade, your county and local labor rates, and quotes in the Washington and Baltimore suburbs tend to run higher than on the Eastern Shore or in Western Maryland. A-DIY deck kits start at $3,699 for pressure-treated wood and $5,700 for composite, typically 30–50% less than hiring a contractor. Use our deck cost calculator to compare prices in your area.

Yes. An engineered deck kit delivers a genuine structural deck without the cost of a contractor’s design time and a full labor crew. The A-DIY kit ships with everything required, footings included, so there is no measuring, cutting or chasing down materials at the lumber yard.

No. A-DIY is not a contractor, holds no MHIC license and does not install decks. We design, engineer and deliver complete deck kits to addresses across Maryland. Build it yourself or hire any local handyman, carpenter or contractor to handle the assembly.

Yes. Many Maryland homeowners bring in a local handyman to assemble their A-DIY kit. The components arrive ready to assemble with step-by-step instructions, so the work takes a fraction of the time of a custom build and the labor bill stays small.

In most cases, yes. Maryland’s counties and municipalities enforce the Maryland Building Performance Standards, currently based on the 2021 International Residential Code, along with their own local amendments. Whether your deck needs a permit depends on its size, height, attachment to the house and the local rules, and if your lot sits within 1,000 feet of tidal water the Chesapeake Bay Critical Area limits on buffers and lot coverage may apply as well. Contact your local building department before you order.

Baltimore City permits are issued by the Department of Housing and Community Development under the city’s 2024 Building, Fire and Related Codes, which adopt the 2021 IRC with city modifications. The city sets its frost line depth at 30 inches, and rooftop decks, common on Baltimore rowhouses, need construction documents signed and sealed by a Maryland-licensed architect or engineer and must meet the city’s rooftop setback rules. Call or visit DHCD’s permit office before you build.

Under the 2021 IRC as adopted in Maryland, footings for a deck supported by the house must extend below the local frost line, which many Maryland jurisdictions set at 30 inches; Baltimore City and Montgomery County both use that figure. Decks not supported by the dwelling are exempt from the frost-line rule under the state code, but counties can amend it, so always confirm with your building department.

Yes. On a sloped or uneven Maryland lot, an A-DIY deck is brought level by adjusting the heights of the supporting posts rather than regrading the yard. Supported configurations can be elevated to approximately 40 inches using the appropriate posts, foundations and bracing.

Tuff Block footings ship with every A-DIY kit. If your site, deck height or local code calls for a different foundation, the deck can be set on sonotubes, helical piles, ground screws, in-ground posts or an approved surface footing system instead.

Both perform well in Maryland. Pressure-treated wood costs less and takes stain or sealer well, but Maryland’s humid summers, roughly 40 inches of rain a year, freeze-thaw winters and salt air along the Chesapeake and Atlantic shores mean it needs regular cleaning and resealing. Composite costs more upfront but never needs sanding, staining or sealing, resists fading and splintering, and its boards carry a 25-year warranty.

Applicable A-DIY deck configurations are engineered to hold up to 15,000 pounds when properly assembled, supported and installed according to the applicable specifications. Every A-DIY deck system also includes a five-year structural warranty.

A-DIY ships to cities and towns across Maryland, typically within 10–14 business days. All components and hardware arrive together in one delivery, so you can start assembling the day it arrives.

Yes. You can choose Build Now, Pay Later financing through Affirm (subject to approval), 0% split payments over up to eight months, or A-DIY Reserve, a $250 deposit that locks in today’s price for a future delivery date.

Yes. For an applicable A-DIY configuration, the diagrams show the dimensions, structural layout, beam, joist and post locations, lumber sizes and major connections, the information Maryland building departments typically want with a deck permit application. Your county or city may still require a site plan, survey or stamped documents, and because the local department has final authority, approval is not guaranteed.