Basement Remodeling Weldon Spring is a family-run basement contractor serving Weldon Spring, St. Charles, Cottleville, Dardenne Prairie and O'Fallon, MO. Built on more than 25 years of construction experience passed down from a carpenter father, our team specializes in basement finishing, full basement remodels, custom basement bars, entertainment rooms, home theater rooms, basement guest suites, wine cellars, basement bathrooms, and home office and fitness room conversions. Weldon Spring's spacious homes deserve finished lower levels to match, and we build them with proper moisture management first, premium finishes second - in that order, every time. We pull all St. Charles County permits, schedule every inspection, and deliver a transparent line-item estimate within 48 hours of your free on-site consultation. Locally owned and operated, we treat every basement like it's in our own home. Call (636) 698-1682 to get started.