Steven Winter Associates, Inc. Improving the Built Environment Since 1972 SWA provides research, consulting, and advisory services to improve commercial, residential, and multifamily built environments for private and public sector clients. We specialize in energy, sustainability and accessibility consulting as well as certification, research & development and compliance services. Our engineers and architects have led the way since 1972 in the development of best practices to achieve high performance buildings. As a matter of course, we collaborate with our clients to produce the most cost-effective and innovative solutions. Visit our blog, Party Walls: www.swinter.com/party-walls