Un-biased Principal Level Attention

Slate Island Realty works selectively on residential and commercial property brokerage assignments in Massachusetts. With offices in Hingham and Dennisport, we focus on the greater Boston area, South Shore and Cape Cod but can handle assignments throughout Massachusetts. As an independent firm, we have the flexibility to offer a full range of brokerage and advisory services, customized to meet your needs, all at reasonable pricing. Slate Island has successfully completed dozens of transactions for our clients in the following Massachusetts communities: Hingham, Cohasset, Hull, Boston, Cambridge, Harwichport, Dennisport, Yarmouth, Oak Bluffs, Westwood, Newton and Easton. 


Representing Buyers is Our Specialty

The founder’s broad real estate background provides our clients with superior insight which can be critical during complex transactions and negotiations. We understand the financing, construction, design, permitting and legal issues that impact the purchase and sale of properties and we know how to work with outside professionals to ensure that these issues are properly addressed for our clients. Our ability to analyze and interpret current market data, prior sale comps and evolving market trends gives our clients the insight needed to purchase the home they want at the right price. 

Selective Sales Assignments

Our work is predominantly referred to us by friends, colleagues and satisfied clients and this is especially true of our sales assignments. We selectively take on assignments where we can leverage our market knowledge, real estate investment experience, development and construction background, and transactional expertise to maximize value for our clients. We have the flexibility to offer our services cost effectively without compromising results.



Mark Carroll



Office: 781-781-1145
Cell: 617-755-5671

Mark has over 25 years of institutional real estate experience working with various property types and in many capacities. In addition, Mark has more than 15 years of residential brokerage experience focused primarily in the greater Boston area – especially in Hingham and the South Shore. Mark has built and renovated several homes in New England, managed multi-million dollar residential and commercial construction projects and negotiated the purchase and sale of residential and commercial properties totaling several hundred million dollars. This broad range of experience provides his clients a perspective that is somewhat unique among the residential brokerage community. Mark has assisted dozens of clients as a buyer’s agent and sold many residential properties in the greater Boston area. 

Education / Licensure

MIT – Bachelor of Science / Civil Engineering
Licensed Real Estate Broker – Commonwealth of Massachusetts

Patricia Brown

Sales Associate, Manager Cape Cod Office Background


Phone: 508-470-2955

Tricia has over 12 years of marketing management experience. Prior to her real estate career, she has been involved in the retail, automotive, technology and publishing industries. She has purchased, renovated and sold multiple homes in Massachusetts.

Education / Licensure

Suffolk University – Bachelor of Science in Business Administration with a concentration in Marketing
Licensed Real Estate Salesperson – Commonwealth of Massachusetts

Bridget Carroll

Sales Associate, Hingham Office Background


Phone: 617-803-4025

Bridget has worked in a variety of roles in her career. Her background in retail sales and marketing and her attention to customer service are strong assets for her clients. She has assisted in the design of several residential renovation projects. Her interest in fashion and interior design compliment her career in real estate. 

Education / Licensure

University of Maine – Bachelor of Arts in Public Administration and Management
Southern Maine College – Associates Degree in Respiratory Therapy
Licensed Real Estate Broker – Commonwealth of Massachusetts


We are often aware of property owners who do not wish to list their homes, land, investment properties or businesses for sale on a multiple listing service or as part of a public process that would bring unwanted attention.  Please contact us if you would like more information.

Hingham / South Shore

Mark Carroll –
88 Kimball Beach Road
Hingham, MA 02043
Phone: 781-875-1145

Cape Cod Office

Tricia Brown –
31 Miramar Avenue
Dennisport, MA 02639
Phone: 508-470-2955

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