About the Company

For nearly 25 years, RJ Grimes has been improving the value of homes throughout Maryland and Southern Pennsylvania. As a locally-owned and operated home improvement contractor, RJ Grimes has a solid record of providing residential roofing, siding, window and gutter installations and repairs. Robert Grimes founded the company in 1991 and continues to oversee estimating, materials and onsite construction.

From a routine repair or upgrade, to renovating your home after damaging weather conditions, we respond promptly and professionally. We communicate with your insurance company to help you get your home back to perfect condition, without delays or hassles.

RJ Grimes is a fully bonded, insured and MHIC licensed contractor (MHIC #87834). 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.

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

Robert Grimes, Owner and Founder

Robert Grimes, owner and founder of RJ Grimes Inc., knew at an early age that he enjoyed helping around the house – working with his hands. Rob loved starting a project and the sense of accomplishment when it was finished. 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 as his career progressed, he began to manage multiple projects – interacting directly with customers. After more than a decade in home construction while successfully managing more than 250 projects, he founded his own business – RJ Grimes Inc.

Maintaining a heritage of “doing things right, the first time” Rob leads RJ Grimes with a laser focus on delivering quality workmanship and exceptional service for homeowners. With the same care when he installed crown molding in his parents home, he continues today to respect the safety and beauty of homes throughout Maryland and Pennsylvania.


 John Hanna, Partner

John has been in the remodeling industry for 20 years in the capacity of estimating and business development.  He knows the ins and outs of all types roofing, siding, windows and gutters.  You will be working directly with John to design your project and on project pricing. John graduated from the University of Maryland with a degree in Natural Resources Management.  John resides in Ellicott City with his wife and twin boys.