Costello Construction is truly in a league of its own. From the quality of their work to the integrity of their leadership, this company sets the standard for excellence in the construction industry. Every interaction I’ve had with their team has been marked by professionalism, transparency, and a genuine commitment to doing things the right way. I want to especially recognize David Costello, whose leadership is the heartbeat of this organization. His reputation for integrity, hard work, and ha

Costello Construction has been a strong and reliable partner across the projects we’ve completed and been awarded together — including the Chesapeake Analytic Collaborative Building, the North Laurel Swimming Pool Addition, The Heights Building Phase II Parking Garage, the Patrick Henry Library, and the Dewey Beach Police Department. Their team is smart, professional, and genuinely easy to work with. They take the time to dive into the small details, ensuring every scope item is accurate and we

Costello is an amazing company to work with as a subcontractor and they do quality work! Looking forward to many more partnership opportunities with Costello

We’ve worked with Costello Construction on several jobs and it’s always been a good experience. Their team is easy to work with, they stay on top of schedules, and the quality of their work speaks for itself. We’d have no problem recommending them to anyone looking for a reliable GC. --The Nexus Company

Great general contractor—professional, dependable, and easy to work with. Projects run smoothly, communication is clear, and the work always gets done the right way. Definitely a reliable team.

We couldn’t be happier with our new office on the Columbia Lakefront, thanks to Costello Construction! Their team went above and beyond to deliver a space that is modern, upscale, and perfectly tailored to our needs. The finished product has already made a huge impression on our staff and visitors. We are truly grateful for their partnership and proud to have them as members of the Howard County Chamber of Commerce.

Costello has been a trade partner for 10 plus years now We have a great relationship We hope to work more with them in the future

Local Guide · 117 reviews · 186 photos