05/12/2026
A new chapter on the Seacoast.
We’ve expanded into New Hampshire through the acquisition of Madden Group, a boutique brokerage serving the Seacoast and surrounding markets.
This move brings the first Sotheby's International Realty office to Portsmouth and builds on our established presence in nearby Newburyport.
We’re pleased to welcome a group of advisors whose deep local expertise strengthens how we serve our clients, while our platform elevates the presentation of New Hampshire’s finest properties.
We look forward to supporting our clients with even greater reach, insight, and expertise across New England.
Learn more → bit.ly/gsir-madden