Trusted Construction Craftsmanship Across Montgomery County
Headquartered in Gaithersburg, Gabriel Maggio Construction delivers premium decks, additions, ADUs, and commercial build-outs to homeowners and businesses in every corner of Montgomery County. From historic Brookeville farmhouses to downtown lofts in Silver Spring, we pair local code knowledge with meticulous craftsmanship—earning 5-star reviews county-wide.
Our Core Construction Services
- Custom Deck Design & Construction – composite, hardwood, and covered outdoor rooms
- Home Additions & Expansions – kitchens, great rooms, second stories
- Accessory Dwelling Units (ADUs) – detached suites, garage conversions
- Exterior Transformations – porches, façade updates, roofing & siding
- Commercial Tenant Fit-Outs – offices, medical, retail, hospitality
- Whole-Home Renovations – gut remodels, layout re-configurations
Every project is built to IBC or IRC 2021 standards—or stricter, per jurisdictional requirements—and backed by our industry-leading workmanship warranty.
Where We Work
Based in Gaithersburg, MD, Gabriel Maggio Construction works throughout Montgomery County. Our service areas include, but are not limited to:
- Bethesda, MD
- Brookeville, MD
- Chevy Chase, MD
- Clarksburg, MD
- Damascus, MD
- Gaithersburg, MD
- Germantown, MD
- Kensington, MD
- Laytonsville, MD
- Montgomery Village, MD
- North Bethesda, MD
- North Potomac, MD
- Olney, MD
- Poolesville, MD
- Potomac, MD
- Rockville, MD
- Silver Spring, MD
- Wheaton, MD
Not in Montgomery County? Contact us to discuss your project. We frequently work with homeowners throughout the greater DC Metro area and would be happy to bring our craftsmanship to your neighborhood.
Ready to Start?
Call us today to discuss your project, get a same-day quote, and lock in a build date that fits your schedule.
Craftsmanship on Display
Browse examples of our decks, additions, and commercial projects across the county.