D4 Construction is skilled in transforming commercial properties into usable commercial or retail space to accommodate your unique vision and business needs. Upfit Construction is ingrained in D4 Construction’s DNA. We have the expertise and knowledge to keep projects on schedule and within budget, regardless of size and scope. Clients that involve D4 Construction early in the design phase realize the value of an interior specialist. From preliminary budgeting through project completion, every client will receive a positive construction experience.