About Us

We are a local, full service real estate brokerage and advisory firm.

About Castlearch

CastleArch Property Advisors is a real estate brokerage and investment services firm based in Watertown, MA. The company was founded in order to provide large institutional quality real estate advisory and brokerage services to small and mid-sized business operators and investors. We have the depth of knowledge, experience and tools to offer best in class services, with the flexibility to quickly adapt and respond to the ever changing market landscape.

What We Do

CastleArch Property Advisors focuses on the leasing and sale of residential and commercial investment properties. We provide a full range of services to assist investors and end users, as well as business and property owners in finding the right solutions to achieve their real estate needs and objectives.

Our core competencies include Tenant and Landlord Advisory and Representation within Office, Retail, and Industrial space, and Commercial and Multifamily Investment Property Sales. With our institutional background and experience, intimate knowledge of the local market, and a high level of financial acumen, we are able to deliver excellence in every detail to ensure our clients have all the necessary tools to make the absolute best real estate decisions.


Right from the first call, I was very impressed with Roberto. He is professional, timely, knowledgeable, and really helped me throughout the whole buying process. He truly takes an interest in his clients and is a pleasure to work with. Roberto will undoubtedly be my first call next time we require a broker!
Clay Nicolau


In addition to providing assistance in subleasing surplus office space in the past, BES has benefited from Roberto’s expertise in our most recent search and transition to a much larger space where our program will continue to grow. Roberto listened to the unique needs of our organization and connected us only to the properties that fulfilled those needs. From planning, to property search, to lease execution, there was never a doubt that we were a priority. The level of communication was great and we are very pleased with our organization’s new home.
Philip Schneider

Director of Operations

I’ve worked with a number of real estate brokers over the years and I found Roberto to be the best in Boston. He was professional, responsive, and prepared. I especially appreciated his consistent follow-ups about available listings or updates about the property that MWI secured in the end. He was also willing to research and answer some questions a few months after we signed, which speaks volumes about his commitment to the well-being of the client relationship. I highly recommend Roberto and look forward to working with him again in the future.
Chuck Doran

Executive Director

I have had the pleasure of working with Roberto since 2005. He is professional, diligent, and always open and honest. He always makes me feel like he is looking out for my interests. I would never do another real estate deal, whether purchasing or leasing without going to Roberto. Quite frankly, I don’t think anyone else could compare.

Shaun P. McMahon

President and Founder