Extremely rare and efficient earth shelter home on nearly 6 lightly wooded acres. Home features a new driveway (2019), recent roof, a two-car detached garage, gazebo, and deck for entertaining. A rare opportunity to own an ultra-efficient earth berm home. Enjoy lasting warmth from your massive Russian heater in the center of the home. Energy savings are maximized with the new (June 2023) 22 SEER2 heat pump, providing AC and heat. The homes 2x8 construction and foam wrapped foundation provide comfortable temps year-round. Updated kitchen and bath, resilient quarry tile floor and soaring vaulted ceilings throughout this one level home. Homeowners preemptively tested foundation for pyrrhotite due to age and proximity to Willington quarry. Report dated 8-17-23 shows the presence of pyrrhotite. Although asymptomatic the sellers are offering this information up front. No further testing performed, and longevity of the foundation cannot be projected. There are currently NO ACTIVE ISSUES with the foundation. This home is move in ready just waiting for a new family to enjoy all it has to offer. Mansfield is a wonderful community with great schools and parks. Near both UCONN & Eastern Connecticut state universities. The price has been reduced due to finding of the chemical make up of foundation.