Dell Developments - Quality Builders in Southampton Dell Developments are respected Southampton house-builders specialising in bringing quality new properties to the market as well as providing complete construction services to developer partners and private homeowners. View our extensive portfolio of building work and read the testimonials of our many satisfied customers, Through expertly managed land purchase schemes, a relentless focus on superior workmanship and a commitment to adopting responsible building methods, Dell Developments has acquired a highly regarded reputation and a growing portfolio of new homes in key locations on the South Coast. See our Industry accreditations.