Steven Kosowsky

Owner / President – Design Housing Inc.

More than 20 years of Real Estate Development experience encompassing highly successful projecst throughout Eastern Massachusetts. Began Real Estate career with Design Housing as Vice President of Development in 1994, leading to purchase of company in 2011. Prior experiences include engineering design, project management and strategy consulting.

Graduate of the Massachusetts Institute of Technology and the Harvard Business School. Chairman of the Radiation Oncology Visiting Committee at the Massachusetts General Hospital since 2001.

Michael Walton - Seton Highlands at the Pinehills

Michael Walton

Partner – Realty Financial Partners

A founding partner and principal of Realty Financial Partners, Michael Walton is responsible for the acquisition, asset management, and disposition of a variety of structured financing transactions, including senior bridge financing, mezzanine debt investments, joint venture equity, and large portfolio loan acquisitions. He has originated, structured, and closed over $1 billion in real estate transactions, including retail, office, industrial, residential, and hospitality, nationwide. He is also responsible for strategic planning and investment at the firm and is a senior member of the investment committee. Prior to forming Realty Financial Partners, Mr. Walton was a Vice President at Congress Realty Group where he was responsible for the asset management and disposition of a diverse portfolio of real estate assets. He started his thirty-year real estate finance career at the First National Bank of Boston as a construction loan officer. Mr. Walton earned a Bachelor of Science degree with honors in Business Administration and Finance from Boston University.


Sue O’Brien

Customer/Design Coordinator

Sue has over 20 years in the new construction field assisting customers select their finishes and options to complete their vision for their new home.


Mike Jones

Project Manager

Veteran project manager, resides in Hingham and has successfully guided luxury residential projects in Hingham, Sharon, Needham, Wellsley, Canton and Boston.


Diana Sides

Sales Associate

Ron and I moved to Pinehills 12 years ago from a beautiful oceanfront island off the tip of Hull called Spinnaker Island.  Ron has two children, Nikki, 40 and Ron Jr. 43.  Nikki is an Occupational Therapist holding a Master’s Degree, and Ron Jr. owns his own business as well as being a well-known Jazz Musician in both the NY and MA areas.

I have been selling new home construction within The Pinehills for 12 years. Seton Highlands for 8 years (5 years for Abbott Homes the original developer, 3 years for Design Housing). Thorndike Homes for 2 years. Pulte Homes at Great Island 2 years. Prior to that retired from Hingham Public Schools, Hingham MA holding two positions:  Director of the Business Technology Department, and Director of the Continuing Education Program for the Town of Hingham. While at Hingham I was the girls’ varsity tennis coach for 20 years and proudly boast we won two Massachusetts State Tennis Championships.

My hobbies include Tennis, golf, reading, walking, sitting at the ocean.  Also spending time with family and friends, and vacationing in Marco Island, FL.