SV Design specializes in beautiful and functional spaces that transform lives through exceptional design. For three decades, we have earned a reputation from Boston’s North Shore to Cape Cod and beyond for elevating communities with residential, multi-family, and institutional spaces of character and integrity.

Thaddeus Thad S Siemasko AIA Founder Principal Architect Commercial Multi-Family Institutional Residential North Shore Cape Cod

Thaddeus S Siemasko, AIA


Thad founded the firm’s architecture practice in 1987 with a driving passion to create exceptional structures for living, learning, and work. The projects he designs are timeless in style, highly functional, thoughtfully placed in the landscape, and carefully woven into the fabric of their communities. Thad's experience spans a wide range of project types and purposes, including academic institutions, commercial facilities, and single- and multi-family residences. He is a Beverly resident who plays an active role in the North Shore business community, serving on local boards and formerly as President of the Rotary Club. Thad's idea of unwinding is tackling house projects at his cottage in Wellfleet.

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