Lassen Realty, LLC

Lassen Realty, LLC is a real estate agency in Westborough, Massachusetts, serving home buyers, sellers, and investors throughout the MetroWest region and beyond. The firm is led by Mark Kosa and Liz Lassen, both licensed Realtors with extensive local experience. Mark brings over 20 years of real estate expertise, enhanced by his background as a home inspector and master electrician, while Liz combines two decades of biotech patent law experience with her real estate brokerage license. The agency specializes in residential transactions across diverse property types, including Cape Cod, Ranch, and Colonial homes, condominiums, townhomes, and new construction, with services extending throughout Massachusetts. Known for transparency and client-focused service, Lassen Realty maintains a 5.00 rating based on verified reviews.

Mark and Liz operate as a dedicated team, emphasizing personal attention and strategic planning for every client. Their approach centers on fully understanding individual real estate goals, evaluating market data, and developing tailored plans. Mark, raised in Newton and a longtime resident of Hopkinton, now lives in Westborough and remains active in community life. Liz, a licensed attorney, transitioned from patent law to real estate to apply her analytical and negotiation skills to helping clients solve real-world challenges. Their combined professional backgrounds allow them to offer unique insights during buying, selling, and investment processes.

The agency is located on Wheeler Road in Westborough, approximately a half-mile from the Despres Family Conservation Area and within a short walk of Annie E. Fales Elementary School. It lies near the intersection of West Main Street and Nourse Street, situated between the peaks of Fay Mountain and Vinal Hill, placing it in a scenic, well-connected part of the town.

With a perfect 5.00 rating and a reputation for integrity, Lassen Realty is recognized locally for reliability, deep market knowledge, and personalized service. Their ability to blend legal precision, technical expertise, and long-term community roots makes them a trusted choice in Westborough’s real estate market.