Philadelphia Construction Design Small Commercial Industrial Projects Philly Designers Constructing Contractor in Square Foot Concepts Company. Square Foot Concepts (SQFT) remodeling & renovations for top-quality in design, building and renovations services. SQFT has experience with all types of projects. We do both interior and exterior work of residential and commercial facilities - striving for quality craftsmanship and a healthy relationship between our clients and their environments. Uniting the expertise of craftsmen our design team has delivered comprehensive design and construction services to clients. Located in Philadelphia, Pennsylvania.