Learn more about GCG

Here is an overview of GCG. Learn more about us and what we can do for you.

Our History

GCG grew out of  a custom home building company that expanded with its clientele to include not only custom ground-up construction, but home additions, renovations, repairs and remodeling. We continue to educate ourselves on all of the current building codes and industry trends. At GCG, we have built our livelihood on building and remodeling homes. From the simple to the lavish, we have built it all, and we can help you every step of the way. No job is too small or too big for our knowledgeable crews. 

Building Code Certifications

  • IRC Residential Building Code 
  • IRC Code Certified Building Contractor C
  • IRC Code Certified Combination Inspector
  • IRC Code Certified Building Inspector
  • IRC Code Certified Electrical Inspector
  • IRC Code Certified Plumbing Inspector
  • IRC Code Certified Mechanical Inspector
  • IRC No. 8010231

Our Promise

Whether it is remodeling your home or repairing damage to your home, we are here to help you every step of the way. We take great care to ensure you are not disrupted during the construction process. we realize that our workspace is your home. everyday before leaving your home the area we are working in is cleaned and organized. 

Professional Designations

  • Certified Professional Home Builder
  • NAHB Graduate Master Builder
  • NAHB Certified Green Building Professional
  • Earth Craft Certified Home Builder

Contact a GCG representative today.   CONTACT GCG >

Our Knowledge

Ron Lester
Ron Lester

Ron Lester grew up in construction in Richmond, VA with his grandfather and father in commercial and residential contracting. He started building homes in Richmond, VA and Baltimore, MD in the early 90’s. After moving to Marietta, GA in 1997, he continued building homes for Wilmont Williams. Learning a great deal from the Williamscraft family, Ron started his own custom home building company in 2006. He  believes his construction background combines the best possible ingredients of practical knowledge passed down from two generations of building experience. In order to be on the forefront of trends and code changes in the home building and remodeling business, Ron takes several industry building code classes and tests each year and believes that GCG is the code certified building and remodeling professionals.

State Licenses

  • RLQA 003511 Light Commercial Qualifying Agent
  • RLCO 003492 Light Commercial Company
  • DET Verifier SF-DET-08-12-11-0016
  • GSWCC Level 1A Certified No.0000015939


  • National Association of Home Builders
  • Greater Atlanta Home Builders Association
  • NARI Member
  • Certified Professional Home Builder
  • EarthCraft / SouthFace
  • Atlanta Remodelers Council
  • International Residential Building Code
  • North West Georgia Inspectors Association

Mark Fulmer
Mark Fulmer

Mark Fulmer has been a home builder and remodeling contractor since the late 1990’s. He was first employed by Homes By Williamscraft where he built subdivisions in Metro Atlanta. He then took the opportunity to start his own business by land acquisition, subdivision development, custom home construction, and custom home remodeling. As a Georgia State Licensed Contractor, Mark has built and remodeled properties in the Atlanta area for more than a decade. Ranging from the simple repairs to high-end custom home and remodeling project, he takes great pride and care on all projects, works with clients from concept to completion, and treats each client and construction project as if it were his own home or own project.



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