Quality Builds Value

Al Johnson and Bob Farnsworth, the team behind A & B Building, collectively have over 80 years of experience in the building trades. Their long history of residential and commercial construction includes design-build of new homes, fireplaces, stairways, custom carpentry, and full-scale remodeling. They are committed to applying their wealth of knowledge in home building and remodeling to all projects – small or large – and pride themselves on providing high-quality results and personal service.

As home builders, we really enjoy getting excited about building projects of all sizes and love it when others share in that excitement. Our goal is to provide our clients with the highest degree of integrity and the most aesthetically pleasing building product, while also staying on budget and schedule.


Areas We Serve

Arcadia Lakes, Blythewood, Columbia, Dentsville, Elgin, Ridgeway,
Rion, Saint Andrews, Seven Oaks, Woodfield, Lexington


Al Johnson


  • A third-generation carpenter, Alan Johnson started his apprenticeship in his father’s residential construction business in Kalamazoo, MI at the age of 14. Johnson later owned and operated a successful custom waterbed design and installation business, and built a chalet home for himself in Paw Paw, MI. Johnson joined Bob Farnsworth as a cabinetmaker, finish carpenter and foreman in residential construction. He then moved to Cincinnati, OH where he worked in residential remodeling, as a foreman in an artisanal cabinet shop, and as supervisor of a large residential estate.

    Johnson then was self-employed as a high-end custom carpenter, specializing in stair systems and fireplaces and occasionally contracted with Farnsworth on upscale residences. Johnson moved to Columbia, SC in 2006, where he continues to collaborate with Farnsworth in carpentry and remodeling in private residences. Johnson has long experience collaborating with interior design consultants and satisfying homeowners by anticipating their needs and creatively solving problems.

Bob Farnsworth


  • As a Licensed General Contractor for 35 years, Bob Farnsworth has been designing, building and developing in both residential and commercial projects. This journey has spanned from Michigan to South Carolina. Started off in rehabbing homes and evolved into building jumbo homes, condos, commercial building, residential communities and of course back to remodeling.

    Having designed and built for individuals, families and companies Bob has created the experience that is so necessary to understand and communicate with clients.Working with pre-construction planning, budgeting and being able to monitor construction can help settle the rough waters of a construction phase.

    Bob has been involved with community development and the environmental challenges associated with heating, cooling, air quality and the on going need to become more green in our approach to affecting the health and well being of his clients.

    Bob has two grown daughters and two grandchildren. He loves South Carolina with it’s diversity in living experience. Having done projects in Myrtle Beach, the mountains and the midlands the challenge is always changing and provides the opportunity to grow

Shane Poage


  • T. Shane Poage is a 26-year construction professional and has been serving in the Lexington and Columbia, SC, area since 2005. From 1999 to 2003, he was employed as a foreman responsible for the overall operation of residential construction to include high-end homes.

    In 2005, Shane relocated to Lexington, SC, and expanded his career to include commercial construction specializing in framing and finish carpentry. Since 2006, he has been self-employed in all areas of residential construction and remodeling. In 2009, Shane joined Al Johnson working on various constructions and remodeling projects. In 2012, he partnered with Bob Farnsworth where he utilizes his craftsmanship and skills in carpentry and remodeling private residences. Collaborating with various consultants, he strives to provide clients with high quality, professional workmanship.