Custom Homes in All Price Ranges to Meet Your Specific Needs.  Tri County Builders has been serving Southern Maryland since 1981. Though our name is "Tri" County, we are not limited to building projects in only 3 counties! We have built over 700 homes in Charles, Calvert, St. Mary's, Prince George's and Anne Arundel counties. You can choose from over 30 different plans in our regular inventory or we are more than happy to build from ANY plan that you may bring to us. Our consultant can help you design your home and make changes on the plans to suit your needs, desires and creativity. Then our CAD (computer aided design) person will help your design come to life! We also have an in-office Design Studio where you are able to view the materials for your new home to help you envision what your home will look like!  We encourage you to visit our Design Studio where we can assist you in selecting all the details for your new home.