Lyme - Habitat for Humanity of Southeastern Connecticut has completed construction of its first environmentally friendly house in the state and will dedicate the property, at 8 Town St. in Hadlyme, at 3 p.m. on Sunday.

The 1,280-square-foot house on the 1.2-acre property is Habitat's first to receive certification from Leadership in Energy and Environmental Design (LEED), the internationally recognized green-building certification program.

Habitat built the three-bedroom, single-family house in collaboration with Lyme Compact, a private nonprofit group in Lyme dedicated to building more affordable houses in town.

Taftville resident Carlee Welsh, a single mother of three, will purchase the Hadlyme house, which sits on land Welsh will lease from the Lyme Compact for 99 years with an option to renew.