Justin Duffy, Licensed Real Estate Agent in New York City

Justin Duffy, Licensed Real Estate Agent in New York City Fifth Madison Group at Brown Harris Stevens provides real estate services for sellers, buyers, investors and developers in Manhattan and worldwide.

FIFTH MADISON GROUP

Fifth Madison Group was founded by Justin Duffy and Mikael Johansson with a clear purpose: to raise the standard of real estate marketing and representation on the Upper East Side. In doing so, we aim to increase property values for sellers and developers in a measurable way over time. The brokerage industry and consumers perceptions and ways of interacting with their real est

ate has changed significantly over the past decade, and the Upper East Side has fallen behind when compared their Downtown and Brooklyn counterparts. This is due in no small part due to lack of innovation, care and marketing of properties in this neighborhood — and our mission is to change that. �

Our strategy to achieve this is threefold:�

1. Education – We help current residents, potential residents and co-op Boards understand how thoughtful preparation, marketing and pricing can benefit themselves and their neighbors long-term.

2. Advisory – We provide serious, data-driven, hands-on and highly personalized brokerage to every seller and developer that we work with.

3. Narrative – Through thoughtful storytelling, visuals, and smart PR, we aim to reintroduce the Upper East Side to a new generation of buyers.�

We keep our client list small by design, so that we can be hands-on with every detail of every transaction from start to finish; no handoffs to junior agents or assistants. We treat each listing like a Private Client project, not a transaction, and our Clients are always #1. While marketing is partly a creative endeavor, we believe pricing and negotiation are not guessing games — and shouldn’t be treated as such. We bring rigor, systems, and strategy to every step of the transaction. JUSTIN DUFFY is a meticulous modern real estate professional with traditional business values. He is the business operations and systems proprietor for Fifth Madison Group. Over the past decade as a broker, Justin has become known for his honesty and candor, his ability to translate customers' goals into strategy, his ability to usher the transaction forward, and a genuine care for his clients' wellbeing. His clients often commend his professionalism, his ability to remain calm in difficult negotiations, and for his sense of humor. Prior to joining Brown Harris Stevens, Justin founded a large, top producing and high-volume team of agents at a boutique real estate firm. Originally from Sweden, MIKAEL JOHANSSON is a sales tour de force and the creative engine behind Fifth Madison Group. His polished and personable persona allows him to navigate the complex relationships that being an effective real estate broker requires. Mikael's aesthetic eye is invaluable for staging and preparing properties for sale, and guiding purchasers toward the right fit in a new home. He also puts a lot of care into his relationships, and is known for his thoughtfulness. Both Justin and Mikael are proud members of the Real Estate Board of New York, New York Residential Agent Continuum, and the American Real Estate Association. Justin holds a Master Certified Negotiation Expert® designation and is a licensed Notary Public. They are both deeply involved in the brokerage community at large and in the Upper East Side neighborhood they both love and call home. Fifth Madison Group is not just a brokerage team — it’s a movement to thoughtfully and strategically reposition one of New York’s most iconic neighborhoods for the next generation. We look forward to working for you.

I’m very pleased to announce that I have joined the oldest privately held real estate brokerage in Manhattan, Brown Harr...
08/27/2025

I’m very pleased to announce that I have joined the oldest privately held real estate brokerage in Manhattan, Brown Harris Stevens with to start a small but mighty team called Fifth Madison Group. Big things coming; follow us!

Price Adjustment! Constructed in 1899, 239 East 48th Street is an elegant 20-foot-wide historic townhouse located in Man...
06/09/2025

Price Adjustment! Constructed in 1899, 239 East 48th Street is an elegant 20-foot-wide historic townhouse located in Manhattan’s coveted Turtle Bay neighborhood. There are six bedrooms, five full bathrooms, two half bathrooms, a large chef’s kitchen and a fully finished basement. Many meticulously preserved details like original crown moldings, four original fireplace mantles, arched doorways and original wrought-iron balconies add to the preserved charm of this historic home. Both balconies overlook a majestic backyard that connects to the exclusive, historic and beautifully landscaped Turtle Bay Gardens, of which only 20 houses have private access to.

Listed with the esteemed Ana Centola and Mikael Johansson .

Justin Duffy
Sotheby’s International Realty
1(646)438-1632
[email protected]
www.JustinDuffy.com

New! Residence 4A at 151 Wooster Street is a beautifully furnished three bedroom, three and a half bathroom, 3,009 squar...
05/08/2025

New! Residence 4A at 151 Wooster Street is a beautifully furnished three bedroom, three and a half bathroom, 3,009 square foot quintessential SoHo loft. Features include 10.5’ barrel-vaulted ceilings, eastern views over cobblestoned Wooster Street, modern chef’s kitchen, a large primary suite, three-zone central air conditioning, Sonos sound system, a dedicated laundry room and more. Elegant 1898 loft building with a 24-hour doorman, full-time superintendent and only seven residences.

Justin Duffy
Sotheby’s International Realty
1(646)438.1632
[email protected]
www.JustinDuffy.com

New! Residence 10G is a meticulously renovated designer prewar two bedroom, two bathroom in Kip’s Bay. Currently configu...
03/24/2025

New! Residence 10G is a meticulously renovated designer prewar two bedroom, two bathroom in Kip’s Bay. Currently configured as a gracious one bedroom with 20-foot living area, highlights include: three sunny exposures through 12 windows, high ceilings, original hardwood floors, a Lincoln Calcutta marble wood-burning fireplace, three walk-in closets, built-in surround sound speaker system and designer finishes throughout. Located in a quiet doorman co-op in Kip’s Bay with a beautiful landscaped roofdeck. Would make a wonderful pied-a-terre. Showings begin Sunday 3/30.

Justin Duffy
C: 1(646)438-1632
[email protected]
www.JustinDuffy.com

In Contract! We received 33 appointments and six all cash, above asking price offers in the first two days of showing fo...
03/24/2025

In Contract! We received 33 appointments and six all cash, above asking price offers in the first two days of showing for this listing at 120 East 75th Street . We are currently in contract for 10% above asking price which, if approved by the co-op Board, will be the second highest sale price of this line in the building history. The same apartment was listed for sale in 2022 and was on the market for four months and didn’t sell. Is the market finally back for sellers?

Justin Duffy
C: 1(646)438-1632
[email protected]
www.JustinDuffy.com

New! Residence 4A at 120 East 75th Street is a sunny, thoughtfully renovated prewar five room apartment with two bedroom...
03/03/2025

New! Residence 4A at 120 East 75th Street is a sunny, thoughtfully renovated prewar five room apartment with two bedrooms, two full bathrooms and a home office. Highlights include central air conditioning, in-unit washer/dryer, high ceilings, original hardwood floors, crown moldings, a wood burning fireplace and extensive custom millwork.

120 East 75th Street is a charming prewar cooperative located on a quiet tree-lined block between Park and Lexington Avenues. The building features a full-time doorman, attentive on-site resident manager, bicycle room, private storage and laundry facilities.

Justin Duffy
C: 1(646)438-1632
[email protected]
www.JustinDuffy.com

Sold! Stunning designer residence previously owned by Suzanne Rheinstein. Filled with sunlight and renovated to perfecti...
10/10/2023

Sold! Stunning designer residence previously owned by Suzanne Rheinstein. Filled with sunlight and renovated to perfection, this apartment is currently configured as a gracious one bedroom, two bathroom, with formal dining room and large corner living room. We represented the very special buyers for this very special home. Sellers represented by our esteemed Sotheby’s International Realty colleagues Sheila Ellis and Pat Wheatley. Last asking $1,600,000, closed at $1,500,000.

Justin Duffy
C: 1(646)438-1632
[email protected]
www.JustinDuffy.com

01/22/2023

First-time buyers were responsible for 31% of sales in December; Individual investors purchased 16% of homes; All-cash sales accounted for 28% of transactions; Distressed sales represented 1% of sales; Properties typically remained on the market for 26 days.

Sold! Beautiful pre-war Arch Digest renovated Classic 6 on quiet tree-lined block in full service building. We represent...
01/21/2023

Sold! Beautiful pre-war Arch Digest renovated Classic 6 on quiet tree-lined block in full service building. We represented the buyers, and couldn’t be happier for them. Last asking $2,295,000, closed at $2,200,000.

Justin Duffy & The AMM Team
C: 1(646)438-1632
[email protected]
www.JustinDuffy.com

01/13/2023

Address

445 Park Avenue, 11th Floor
New York, NY
10022

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