About the Company

RJ Grimes has been improving the value of homes throughout Maryland and Southern Pennsylvania for a quarter of a century. As a locally-owned and operated home improvement contractor, RJ Grimes is a fully bonded, insured and MHIC licensed contractor (MHIC #87834). We take pride in our solid record of providing residential roofing, siding, window and gutter installations and repairs.

We believe that your home deserves a commitment by our entire staff to deliver the highest quality workmanship and the finest materials. We are proud of our consistent A+ rating with the Better Business Bureau (BBB) and Angie’s List.

We are certified with GAF, North America’s largest manufacturer of commercial and residential roofing,  DuPont Tyvek Building Envelope systems and a WOLF PVC Decking certified deck builder.


Robert Grimes, Partner

Robert Grimes knew at an early age that he enjoyed helping around the house – working with his hands. At age 17, Robert’s mother wanted him to install crown molding in the living room. He jumped at the opportunity, and once he finished, he knew then what he wanted to do with his life.

After graduating from Catonsville Community College, with a degree in Construction Management and Design, Rob accepted a position with a Ryan Homes. He began designing and building homes and later began to manage multiple projects – interacting directly with customers. After a decade in home construction, managing more than 250 projects, he founded RJ Grimes Inc.



 John Hanna, Partner

John has been in the remodeling industry for 20 years in the capacity of estimating and business development. He understands the ins and outs of all types roofing, siding, windows and gutters.  You will be working directly with John to design and estimate your project.

John is a graduate of the University of Maryland, with a degree in Natural Resources Management.  John resides in Ellicott City with his wife and twin boys.