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Agent Profile

Duncan (Ashley) Lonsdale

Duncan (Ashley) Lonsdale

Licensed Real Estate Salesperson
West Side Office


Tel: (212) 381-2610
Cell: (917) 439-6511

Sapphire Club Member

The many relevant assets Ashley brings to his RE career include backgrounds in marketing, design, architecture, and technology; coupled with methodical planning, negotiation skills, and an acute visual memory. These skills enabled him to hit the ground running—selling homes at the high-end of the market within his first few years at Halstead. His life-long background as a competitive athlete further fortifies his drive and determination.

Born in the UK, Ashley came to New York City via the Midwest, earning a bachelor’s degree in Industrial Design (Space Planning) at The Ohio State University.

As a New York City transplant, he has a tremendous passion for this great city—its history, architecture, and international and social diversity. He’s lived in several neighborhoods—Battery Park City, Union Square, UWS, and now the UES. He was previously a board member for seven years in a luxury co-op building. He and his wife have three children: a son who attended The Collegiate School, and two daughters, one currently attending The Chapin School. He is a huge advocate of a work/life balance and also recognizes the importance of giving back. He is actively involved in chairing school events and volunteering within the community.

Prior to joining Halstead Real Estate, Ashley was a Marketing Manager for AXA Financial, then principal and founder of Artonica, LLC, a firm specializing in creative marketing solutions for businesses. At Halstead, his strategic marketing plans are reinforced by high aesthetic standards. Further, his background in Interior Space Design enables him to redesign “less than perfect” spaces on the fly, helping a buyer understand hidden potential and value.

Ashley is also a world traveler and avid outdoorsman who is equally comfortable enjoying an elegant meal in the south of France as he is eating rice and beans in the Alaskan wilderness. This versatile approach to life allows him to relate well to a wide range of people. Ashley is also an accomplished endurance athlete who enjoys both the mental and physical challenges of competition. He’s been a Top 25-ranked All-American amateur triathlete spanning multiple decades and has participated in over 200 endurance events including two trips to the Ironman World Championship Triathlon in Kona, Hawaii.

Whether buying or selling an apartment, Ashley equates the sales process—from the initial discussion to a successful closing—like running a marathon. Both require proper preparation, sustained focus, and the ability to make intelligent adjustments if and when things don’t go as expected. And, when executed properly, the journey can be as enjoyable as crossing the finish line.

Halstead Manhattan, LLC

Current Listings

Past Closings

The following are selected closed transactions in which Duncan (Ashley) Lonsdale represented the buyer, the seller, or both:


Featured Blog Posts

Pre-war Superstars - The Great Candela
Pre-war Superstars - The Great Candela

Architect Rosario Candela represents the gold standard of New York City pre-war residential architecture. To live in a Candela Building is synonymous with the utmost in luxury both then and now. Though his buildings may not be as iconic and pierce the skyline as spectacularly as Emery Roth (another great),...
Tuesday, June 06, 2017

More on the Little Red Lighthouse Festival
More On The Little Red Lighthouse Festival

If you haven’t visited the Little Red Lighthouse, you’re missing one of New York’s most serene and photogenic treasures, and there is no better time to see it than on Saturday, September 24th – the only day each year that visitors are allowed inside! But that’s not the best part…...
Tuesday, September 20, 2016

10 Red Hot Architects Shaping New York City
10 Red Hot Architects Shaping New York City

World-renowned architects are transforming the New York City skyline and streetscape with an impact not seen in decades. As residents of this melting pot, our opinions often differ wildly on what is beautiful, what is ugly, and on what is “right” for New York. It’s worth noting that in 1929...
Friday, April 22, 2016

Iconic NYC Buildings & Their Architects
Iconic NYc Buildings & Their Architects

Many people have a favorite New York City building, even if they don’t live in this great city. Still, if you ask a New Yorker which firm designed the Empire State Building, they may not be able to recall that is was the firm of, um… (see below). To me,...
Thursday, February 18, 2016

10 December Activities You May Not Know About
10 December Activities You May Not Know About

New York City, hands down, is the best place to spend the Holidays. The Nutcracker, Rockettes and holiday markets are all terrific NYC events and attractions that make this town special, but even these gems can run their course. Here is my list of additional ideas for those looking for...
Monday, December 21, 2015

Duncan Ashley Lonsdale Wins Photo of the Week
Duncan Ashley Lonsdale Wins Photo Of The Week

#EXPLOREYOURHOOD PHOTO OF THE WEEK - WEEK 9  Congratulations to Duncan (Ashley) Lonsdale of our Westside Office! He is the ninth winner in Halstead Property’s #ExploreYourHood Photo of the Week Contest. Ashley took this beautiful springtime photo in Riverside Park on Manhattan’s Upper West Side...
Tuesday, May 19, 2015

Ashley Lonsdale's Best Tennis Spots in NYC
Ashley Lonsdale's Best Tennis Spots In NYc

Today’s beginning of the US Open may signal the end of the “Grand Slam” season for professional tennis, but there are still a few more good months weather-wise for the rest of us to pick up a racquet on the many free (or close to free) outdoor courts in Manhattan...
Tuesday, August 26, 2014

Triathlete Agent's Top NYC Master Swim Spots
Triathlete Agent's Top NYc Master Swim Spots

How to Make Swimming A Year Round New York City Sport  By  Duncan Ashley Lonsdale , Licensed Real Estate Salesperson - Upper West Side Office What many New Yorkers outside of the “swimming community” don’t realize is that swimming is a year around...
Saturday, December 07, 2013

Duncan Ashley Lonsdale's Manhattan Must Do
Duncan Ashley Lonsdale's Manhattan Must Do

NYC MUST DO: Model to Monument (M2M) By  Duncan Ashley Lonsdale ,  Licensed Real Estate Salesperson - Upper West Side Office There are still some beautiful fall days left to experience some of the great outdoor treasures of Manhattan’s Upper West Side. Consider a stroll to...
Wednesday, November 20, 2013

Market Reports