Building Energy

About us

Building Energy is a Vermont-based home performance and clean energy company specialising in deep energy retrofits that transform existing houses into high-performance, energy-efficient homes. Operating from offices in Williston and White River Junction, Vermont, the company delivers a comprehensive, whole-building approach targeting a home's thermal envelope — insulation, air sealing, windows, and mechanical systems — rather than isolated, surface-level upgrades.

Building Energy's retrofit process begins with a detailed energy audit using blower-door testing and infrared imaging to identify air leaks, insulation gaps, and mechanical inefficiencies, followed by a customised retrofit plan combining high-performance insulation, air sealing, window replacement, cold-climate heat pump systems, and solar integration. The company emphasises non-toxic insulation materials — cellulose made with up to 85% recycled content, and spray foam produced from recycled plastic and soy — and provides post-retrofit testing to verify measurable gains in efficiency, comfort, and indoor air quality. Building Energy has particular experience retrofitting historic Vermont buildings, including documented projects on 1840s-era farmhouses, balancing preservation of period character with modern energy performance.

Beyond deep retrofits, the company offers residential solar installation, weatherization, cold-climate heat pumps, solar battery storage, and energy audits as an integrated suite of services, positioning whole-home decarbonisation as achievable through a single local contractor rather than multiple specialist subcontractors. Building Energy is based at 1570 South Brownell Road, Williston, VT 05495, and 2458 Christian Street, Suite 201, White River Junction, VT 05001, United States, and can be reached at (802) 859-3384.