Custom Building Systems LLC manufactures its modular homes to your specific custom designs. Custom Building Systems LLC has redefined the way people build homes, whether it’s an affordable starter home or a highly-customized luxury showpiece. Models include ranch, cape cod, two story and multi-family. We're not a high volume mass producer, so we have custom design flexibility that others don't. Our manufacturing facility provides housing to the states of PA, CT, DE, MA, MD, ME, NH, NJ, NY, RI, VA, VT, NC, and WV. View our modular home gallery , multi-family/projects and our plant tour. Contact us to find a modular builder in your area who can provide custom modular home prices, designs and mortgage loan financing options.