Welcome to Leeds Environmental Design Associates (LEDA), a team of designers dedicated to creating great sustainable buildings that respect the environment and are a joy to use. Registered in 1997, we are a multi-disciplinary co-operative of architects and building services engineers. We deliver quality, efficient, integrated design solutions in tandem with specialist advice, feasibility strategies and low carbon consultancy. We help clients address all aspects of sustainability: social; environmental and economic. We have extensive experience of delivering buildings under exacting low energy standards such as PassivHause, AECB and Code for Sustainable Home Level 6, EPC 'A' rating and BREEAM Outstanding. Our engineering design embraces lean design and provides low cost, easy to use and cheap to maintain buildings.