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also known as David Marshall Datz PC, real estate attorney
Ryan practices residential real estate law and effectively represents buyers, sellers, and lenders. His legal experience ranges from a solo-practitioner law firm to the General Counsel's Office of the Boston Public Health Commission (BPHC), the nation’s first Public Health Commission, where Ryan advised and defended the agency’s approximately 1,800 employees and litigated in Suffolk Superior Court. While at BPHC, he wrote substantial portions of a successful and precedent-setting legal brief before Massachusetts Court of Appeals. Ryan is also former small business owner and a licensed Massachusetts Real Estate Broker. He earned a Bachelor of Science degree in Business Administration from Babson College and a Juris Doctor degree from Suffolk University Law School.
Prior to joining Datz Law, Ryan ran a successful real estate law practice with Ligris + Associates for over seven years. Before joining the bar, Ryan worked in Global Marketing and Communications at Reebok International Ltd. World Headquarters where he helped oversee and create international marketing campaigns. He also interned with the Commonwealth of Massachusetts Office of the State Auditor where he assisted in large educational audits of the Commonwealth’s public universities.
Using the unique skill sets he has obtained from these diverse industries, Ryan creates dynamic and efficient problem-solving solutions to more effectively advocate for the interests of his clients.
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Practice Areas
15 years
8 years
Free Consultation
$0 first 30 minutes
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Chat withState: Massachusetts
Acquired: 2012
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530 Tremont Street, Boston, MA, 02116
167 Commercial Street, Provincetown, MA, 02657
179 Cranberry Highway (MA-6A), Orleans, MA, 02653
44 Client Reviews
Showing 1 - 5 of 20 reviews | Recommendation
Posted by Sabatino | December 23, 2025 | Hired Attorney | Real Estate
Attention to detail & timely completion of home closing
Choosing Ryan's services for our home closing was a great decision. We felt we were in good hands every step of the way. Ryan's attention to detail is fantastic, and we ended up being ahead of schedule to close sooner than expected. Thank you!
Thank you so much for the kind words! I truly appreciate you taking the time to share your experience. It was a pleasure representing you, and I’m glad you felt supported and well-informed throughout the process. Congratulations again on your new home, and I wish you all the best as you settle in. If I can ever be a resource down the road, please don’t hesitate to reach out!
Posted by Luke | November 25, 2025 | Hired Attorney | Real Estate
Ryan Cunningham, Five-Star Real Estate Attorney.
I highly recommend Ryan Cunningham. At 55, I never expected to need to buy a condo on short notice, but life had other plans for me. Ryan made the whole process smooth and far less stressful. He moved quickly, explained everything clearly, and was always responsive. His attention to detail and steady...
: Thank you so much for this incredibly thoughtful review. Buying on short notice can be overwhelming, and I’m truly glad I could help make things feel smoother and less stressful for you. It was a pleasure working with you, and I really appreciate your trust throughout the process. If you ever need anything down the road -or if friends or family find themselves in a similar situation - I’m always here to help. Wishing you many happy years in your new home!
Posted by Ariella & Ben | April 21, 2025 | Hired Attorney | Real Estate
We cannot recommend Ryan highly enough!
Ryan and his team went above and beyond for us throughout our home purchase. While bending over backwards to ensure every detail was correct and working with difficult outside parties, he remained professional, positive, and delightful. We will be coming to Ryan with future needs and highly recommend...
Thank you so much for your incredibly kind words! It was truly a pleasure working with you throughout your home purchase. I'm grateful for the trust you placed in me and my team, especially during a process that can sometimes be stressful. We always strive to provide clear, thorough, and responsive support, and it means a lot to hear that you felt well taken care of. I look forward to assisting you again in the future and sincerely appreciate your recommendation! Warm regards, Ryan
Posted by Norma | April 17, 2025 | Hired Attorney | Real Estate
Best Real Estate Attorney
Exceptional service, very responsive, always on top of everything, We had a very smooth closing, no delays. Thank you so much! Look forward to working with you in the near future.
Norma, thank you very much for your thoughtful feedback. It was a pleasure working with you as well, and I’m pleased to hear that my involvement in the transaction helped the closing process flow more seamlessly. I look forward to the opportunity to work together again in the near future!
Posted by Kayla | March 10, 2025 | Hired Attorney | Residential
First Time Home Buyers!
We recently worked with Ryan on buying our first home in Somerville! As first time home buyers, we did not know what to expect from this process. Ryan helped us through each step, and was available whenever we needed questions answered or problems solved. It was great peace of mind to know that we ha...
Thank you, Kayla! I'm so happy to hear you were completely satisfied with our representation of you in your new home purchase. Wishing you all the best in your brand new home!
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2020
Clients' Choice Award, Avvo
2019 - Present
Attorney, David Marshall Datz, PC
2012 - Present
Attorney, Ligris & Associates, PC
2011 - Present
Massachusetts Bar AssociationMember
2011 - Present
Boston Bar AssociationMember
2011 - Present
Massachusetts Lesbian and Gay Bar AssociationMember
Successful Defense against Big Tobacco
2011
JD - Juris Doctor
2006
Business Management
2019
2011
English