Modern Residential Architecture and House Extension Design in Derby | Sigma Architects Sigma Architects provides professional architectural design services in Derby, Derbyshire, and the East Midlands. Specialising in residential architecture, modern house extensions, home renovations, and commercial building design, Sigma Architects combines creativity with practical planning to develop functional and visually appealing spaces. Explore innovative architectural solutions tailored to your property requirements. Read more at: https://www.sigma-architects.co.uk/