John Lonborg

John Lonborg

Luxury Real Estate Agent, NH, ME & MA

John Lonborg brings exceptional expertise and a proven track record to LandVest Christie's Portsmouth office, where he specializes in luxury properties throughout New Hampshire's Seacoast region, Southern Maine, and Massachusetts. After a transformative decade living in Nosara, Costa Rica, John returned to the United States in 2013 with a global perspective and authentic approach to client relationships that have become his hallmark. Licensed in New Hampshire, Maine, and Massachusetts, [...]

John Lonborg brings exceptional expertise and a proven track record to LandVest Christie's Portsmouth office, where he specializes in luxury properties throughout New Hampshire's Seacoast region, Southern Maine, and Massachusetts. After a transformative decade living in Nosara, Costa Rica, John returned to the United States in 2013 with a global perspective and authentic approach to client relationships that have become his hallmark. Licensed in New Hampshire, Maine, and Massachusetts, John leverages his comprehensive market knowledge while residing in Exeter, NH.

Previously serving as Director of Sales at Four Seasons Private Residences | One Dalton in Boston, John has established himself as a leading luxury real estate professional with transactions approaching half a billion dollars. Since joining The Collaborative Companies in 2015, John played a pivotal role in the successful marketing and sell-out of Boston's most prestigious developments, including Proto Kendall Square, Hub50House, and Telford 180, consistently breaking price-per-square-foot records.

John’s leadership experience includes management positions at Coldwell Banker in the Weston and Wellesley markets, where he refined his strategic vision and mentorship abilities. His integrity and unwavering dedication have earned him the trust of discerning clients, including Boston Properties, Delaware North, The Davis Companies, and Carpenter & Co.

Beyond real estate, John is a devoted family man with diverse passions including landscape design, golf, surfing, music, beekeeping, and culinary arts. His connection to nature and commitment to community values complement his professional expertise, allowing him to provide uniquely personalized service to his clients at LandVest Christie's International Real Estate.

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  • Specialties: LandVest | Christie's International Real Estate
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LandVest's Blog Posts

2025 New England Luxury Real Estate Report04.20.26

2025 New England Luxury Real Estate Report
The New England Luxury Real Estate Report is an annual review of select high-end markets in Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, and the Adirondacks. Commentary and insights are provided by Luxury Real Estate Advisor [...]

The Risk of Waiting to Sell: The Next Five Years in Today's Market02.19.26

The Risk of Waiting to Sell: The Next Five Years in Today's Market
The economy feels unsettled. Unemployment is negatively impacting white collar jobs. Consumer sentiment is down. The Federal Reserve is holding rates flat, with no clear timeline for cuts. Costs remain high, and uncertainty is a constant in conversation.

LandVest | Christie's International Real Estate Surpasses $1 Billion in Annual Sales01.15.26

LandVest | Christie's International Real Estate Surpasses $1 Billion in Annual Sales
LandVest | Christie’s International Real Estate closed more than $1 billion in residential sales in 2025. The result reflects a year of disciplined growth across New England, with an average sale price of $2.5 Million

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