Erin McMahon REALTOR®

Portrait photo of Erin McMahon

Portsmouth, NH

77 Hanover St Unit 22
Portsmouth, NH 03801

Office Phone: 603-431-8977


Erin McMahon is a second generation Realtor, sharing with her mother a genuine passion for helping clients achieve their real estate ambitions.  Born and raised near the beautiful seacoast of South Carolina, Erin has always had a love for coastal living.  From the beautiful landscape of her southern roots, Erin found herself wanting to explore new places and has lived in the northeast for past 10 years.  After living in Saratoga Springs, New York for several years, she and her husband settled down on the charming Seacoast of New England. 

Living in the coastal town of Portsmouth, New Hampshire with their two dogs Ellie and Lexi, the McMahon's love everything the Seacoast of New Hampshire has to offer.  From beach side restaurants to concerts in the park (or beach side) to skiing the trails of the White Mountains, there is so much to love about southern New Hampshire.  Erin enjoys golfing, traveling, dining at local restaurants and spending time with family and friends.

In her professional life Erin revels most in providing excellent customer service while meeting new and interesting people day after day.  If you are looking for a Realtor® with southern hospitality and an inherent love for helping others, Erin is the agent for you. 



Service Areas

Rye, NH, Portsmouth, NH, Hampton, NH, Northampton, NH, Exeter, NH, Stratham, NH, New Castle, NH, Newington, NH, Newfields, NH, Newmarket, NH, Greenland, NH, Dover, NH, Durham, NH, Brentwood, NH, Kingston, NH

Ask Erin McMahon


Erin was wonderful to work with and understood what I was looking for and allowed me to take the time I needed to find my home. She was always thinking of what was best for me and knew when to step in and when to let me take my time because of some issues I was going through. She was so friendly and delightful to work with and I am very happy we were able to work together to find me my home!!! I will miss her very much!!! :) Thank you Erin!!! :)

- Shawn Richmond

Erin was extremely professional and communicated with us throughout the entire process. Would not hesitate to use her again.

- Sean Evans

Great attention to detail and follow up.

- Jonathan Bobbett

I was a Massachusetts homeowner and a former agent working for a Massachusetts Berkshire Hathaway Brokerage. We decided for several reasons to relocate to the New Hampshire seacoast region. We did not know a New Hampshire agent, but I knew I wanted a BHHS agent. I chose Erin McMahon from the long list of agents on the New Hampshire Berkshire Hathaway website. Contacting Erin was the best decision I could have made. Anyone looking to purchase a home during this market knows how difficult it is to acquire the perfect house. There seemed to be more buyers than sellers. Because of Erin’s experienced and tenacious efforts we were able to have our forever home offer accepted and we are so happy now. It’s not unusual for there to be “bumps in the road” within the home buying process. We had ours, but thanks to Erin’s Real Estate knowledge, she was able to navigate us through it all. Not only did we move into our dream home, but Erin taught me a few things I never knew about Real Estate before.

- Claire Preece

Erin is so attentive to the client needs!

- Beverly Chapinski

Property Specialties

55+ Communities, Commercial, Equestrian, Fine Homes, Golf Communities, Historical Homes, Investment Properties, Multi-Family, New Construction, Relocation, Senior Housing, Waterfront Homes