Over 40 Years of Landscaping Excellence

Our residential landscaping services can transform your yard into the outdoor living space of your dreams.  Over 4 decades of experience in landscaping, irrigation, and hardscapes allows us to offer a superior service at an affordable cost.

Denison is one of the Washington, DC , Virginia,  Maryland, and Delaware’s largest landscape contractors. A family owned corporation since 1973- we have the experience, expert personnel, and equipment to handle all of your commercial or residential landscaping needs. In addition to design/build capabilities for landscaping, we also offer design/build irrigation, lighting, hardscapes, drainage, erosion control, maintenance, and snow removal.

John Denison- Owner of Denison Landscaping

John Denison

I’m proud to put the Denison family name on the quality work that we do. Commitment, Quality, and Service are the roots of our business.
Learn More

See What People Are Saying About Denison

  • All I can say is, you and your team are to be commended for planning and putting in some incredible new flower beds!!  They are “AMAZINGLY BEAUTIFUL”!!!!!!

    Carol B.
  • Thank you for the work that you’ve done over the past months.  For the past 8 years I was almost ashamed of my backyard.  It looks great now.  I can’t wait to have guests over for a cookout.

    Claude J.