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Justin Duffy

NYRS, CNE, Licensed Associate Real Estate Broker View My Listings

member of

The Fifth Madison Group

mobile

646-438-1632

office

212-452-6274

[email protected]

address

East Side Office
445 Park Avenue
New York, NY 10022

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Meet Justin

JUSTIN DUFFY is a meticulous modern real estate professional with traditional business values. He is the founder of Fifth Madison Group at Brown Harris Stevens, a small boutique team dedicated to elevating the standard of marketing and brokerage on the Upper East Side. 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 his sense of humor. Prior to founding Fifth Madison Group at Brown Harris Stevens, Justin spent several years at Sotheby's International Realty after leading another large, top-producing team at a smaller boutique real estate firm.

Previous to real estate, Justin worked in the fashion industry as a regional manager, merchandiser, store designer, and window dresser. He was born and raised in Brick, NJ along the Jersey Shore and currently resides on 62nd and Park Avenue with his five-year-old rescue dog, Terra. You can often find him at East 60’s neighborhood staples such as Bel Ami, David Burke Tavern and Equinox, or volunteering at New York Common Pantry.

Justin is an active member of the Real Estate Board of New York, New York Residential Agent Continuum, and the American Real Estate Association. He holds a Master Certified Negotiation Expert® designation from RENI and is a licensed Notary Public. He is deeply involved in the brokerage community and in the Upper East Side neighborhood he calls home.

Fifth Madison Group at Brown Harris Stevens 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.

Born In

Brick, New Jersey (near "The Jersey Shore")

Interests

Music, philosophy, my dog Terra, and Manhattan real estate, of course!

Favorite Quote

"When you change the way you look at things, the things you look at change."

Justin Duffy’s

Highlights

Years in Business

Agent highlights are based on historical MLS inventory data and may not reflect this agent's entire sales history.

BHS Team

Fifth Madison Group

Justin Duffy

NYRS, CNE, Licensed Associate Real Estate Broker

Featured Listings

For Sale (4)

885 Park Avenue #12B $6,850,000 4 beds, 3.5 baths, 9 rooms View Details

Lenox Hill, NY

Contract Signed

21 East 90th Street #3C $2,295,000 2 beds, 2 baths, 5 rooms View Details

Carnegie Hill, NY

New

303 Park Avenue #2225 $1,715,000 Studio, 1 baths, 635 sqft View Details

Midtown East, NY

Contract Signed

320 East 42nd Street #1001 $575,000 1 beds, 1 baths View Details

Midtown East, NY

Justin Duffy’s

200 East 83rd Street, #27A $11,483,437

5 Bed
5.5 Bath
11 Rooms

West Village, NY 45 Barrow Street $7,400,000

4 Bed
3 Bath
8 Rooms

Listed by Sothebys International Realty

993 Park Avenue, #8E/9D $5,400,000

5 Bed
4 Bath
9 Rooms

SoHo, NY 151 Wooster Street #6A $5,250,000

3 Bed
3.5 Bath
6 Rooms

Listed by Sothebys International Realty

TriBeCa, NY 71 Reade Street #5B $4,860,000

4 Bed
3.5 Bath
6 Rooms

Listed by Sothebys International Realty

1165 Park Avenue, #12A $4,495,000

3 Bed
3 Bath
6 Rooms

Lenox Hill, NY 131 East 66th Street #10/11B $4,100,000

4 Bed
3.5 Bath
9 Rooms

Listed by Sothebys International Realty

880 Fifth Avenue, #4JK $3,600,000

3 Bed
3.5 Bath
7 Rooms

129 East 69th Street, #7B $3,495,000

3 Bed
3 Bath
6 Rooms

1212 Fifth Avenue, #5B $3,300,000

3 Bed
3 Bath
6 Rooms

Sutton, NY 345 East 57th Street #11AB $3,212,500

4 Bed
3.5 Bath
8 Rooms

Listed by Sothebys International Realty

Greenwich Village, NY 39 East 10th Street #1W $2,525,000

2 Bed
2 Bath
6 Rooms

Listed by Sothebys International Realty

Greenwich Village, NY 51 Fifth Avenue #2A $2,375,000

2 Bed
2 Bath
5 Rooms

Listed by Sothebys International Realty

140 East 81 Street, #3A $2,295,000

3 Bed
2 Bath
5 Rooms

Midtown East, NY 303 Park Avenue #2225 $1,935,000

Studio
1 Bath
1 Rooms

Listed by Douglas Elliman Real Estate

Midtown East, NY 303 Park Avenue #2224 $1,895,000

Studio
1 Bath
1 Rooms

Listed by Douglas Elliman Real Estate

Upper East Side, NY 120 East 75th Street #4A $1,850,000 $155K

2 Bed
2 Bath
5 Rooms

Listed by Sothebys International Realty

901 Lexington Avenue, #8S $1,600,000

2 Bed
2 Bath
4 Rooms

217 East 7th Street #4CD $1,500,000

2 Bed
2 Bath

Carnegie Hill, NY 49 East 96th Street #7A $1,425,000

2 Bed
2 Bath
5 Rooms

Listed by Sothebys International Realty

Gramercy, NY 235 East 22nd Street #14A $1,350,000

2 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

Midtown South, NY 425 5th Avenue #33B $1,062,500

1 Bed
1 Bath
3 Rooms

Listed by Sothebys International Realty

Upper East Side, NY 225 East 74th Street #5J $980,000

2 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

225 East 73rd Street, #7B $945,000

1 Bed
1 Bath
2 Rooms

Kips Bay, NY 140 East 28th Street #6D $925,000

1 Bed
1 Bath
4 Rooms

Listed by Sothebys International Realty

345 East 80th Street, #30G $799,000

1 Bed
1 Bath
2 Rooms

200 West 79th Street #3M $625,000

1 Bed
1 Bath

Carnegie Hill, NY 16 East 98th Street #5D $410,000 $5K

Studio
1 Bath
3 Rooms

Listed by Sothebys International Realty

Kips Bay, NY 140 East 28th Street #3E $405,000

Studio
1 Bath
3 Rooms

Listed by Sothebys International Realty

SoHo, NY 151 Wooster Street #4A $28,000

3 Bed
3.5 Bath
6 Rooms

Listed by Sothebys International Realty

SoHo, NY 151 Wooster Street #6B $18,000

3 Bed
3 Bath
6 Rooms

Listed by Sothebys International Realty

Kips Bay, NY 140 East 28th Street #10G $8,950

2 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

Upper East Side, NY 120 East 75th Street #4A $8,500

2 Bed
2 Bath
5 Rooms

Listed by Sothebys International Realty

Kips Bay, NY 140 East 28th Street #10G $7,950

2 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

1235 Park Avenue, #6A $7,950

2 Bed
2 Bath
4 Rooms

250 East 54th Street, #37A $7,800

2 Bed
2 Bath
4 Rooms

2 River Terrace, #30F $7,600

1 Bed

1297 Lexington Avenue #5B $6,500

2 Bed

Lincoln Square, NY 1965 Broadway #20G $6,495

1 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

Flatiron District, NY 14 East 23rd Street #4A $5,500

3 Bed
1 Bath
5 Rooms

Listed by Bond New York Properties LLC

Lincoln Square, NY 62 West 62nd Street #5E $5,495

1 Bed
1.5 Bath
3 Rooms

Listed by Sothebys International Realty

Yorkville, NY 206 East 95th Street #11B $5,250

2 Bed
2 Bath
4 Rooms

Listed by Sothebys International Realty

296 East 95th Street, #11B $5,250

2 Bed
2 Bath
4 Rooms

Yorkville, NY 206 East 95th Street #11A $5,100

2 Bed
2 Bath
5 Rooms

Listed by Sothebys International Realty

75 East 3rd Street, #E1 $4,400

1 Bed

202 East 77th Street, #8E $4,250

1 Bed
1 Bath
2 Rooms

189 Avenue C, #3D $4,000

1 Bed

112 Lexington Avenue, #5 $3,820

1 Bed

112 Lexington Avenue #3 $3,800

1 Bed

East Village, NY 87 Saint Marks Place #3A $3,495

1 Bed
1 Bath
3 Rooms

Listed by Sothebys International Realty

73 East 3rd Street, #A1 $3,305

1 Bed

75 East 3rd Street, #D4 $3,295

1 Bed

East Village, NY 73 East 3rd Street #D2 $3,100 $205

1 Bed
1 Bath
4 Rooms

Listed by Sothebys International Realty

1694 Park Avenue, #1S $1,950

1 Bed
1 Bath
2 Rooms

44 East 63rd Street, #1D $1,895

East Village, NY 75 East 3rd Street #A3 $1,795

1 Bed
1 Bath
3 Rooms

Listed by Sothebys International Realty

73 East 3rd Street, #D4

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Testimonials

"Justin Duffy recently helped sell our co-op on East 75th and Park Avenue on the Upper East Side. We had attempted a sale a few years prior with another broker which was unsuccessful. Justin helped us rent the apartment for two years, and then spoke with us throughout that entire time period in order to strategize the eventual re-list for sale. His ... (read more)
"Justin Duffy recently helped sell our co-op on East 75th and Park Avenue on the Upper East Side. We had attempted a sale a few years prior with another broker which was unsuccessful. Justin helped us rent the apartment for two years, and then spoke with us throughout that entire time period in order to strategize the eventual re-list for sale. His guidance was strategic and spot-on every step of the way. He sold our apartment for 10% above asking price in two weeks, which is the highest sale price in our building's history for our line of apartment. We would highly recommend him to anyone considering selling their apartment on Upper East Side."

E. G.

"Justin managed the sale of our mother's apartment on the Upper East Side. He was a steady hand throughout the very difficult emotional and financial process of preparing and parting with our family's home of many years. He achieved a great outcome for us quickly and we felt empowered throughout the transaction. Thank you Justin."
"Justin managed the sale of our mother's apartment on the Upper East Side. He was a steady hand throughout the very difficult emotional and financial process of preparing and parting with our family's home of many years. He achieved a great outcome for us quickly and we felt empowered throughout the transaction. Thank you Justin."

Aaron W.

"My wife and I worked with Justin to buy a cooperative apartment on the Upper East Side. Justin is incredible, and we can't recommend him highly enough! As first-time homebuyers, the process was daunting, but Justin's thoughtfulness, transparency, and deep knowledge made the experience as seamless as possible. Justin has a unique blend of IQ+EQ ... (read more)
"My wife and I worked with Justin to buy a cooperative apartment on the Upper East Side. Justin is incredible, and we can't recommend him highly enough! As first-time homebuyers, the process was daunting, but Justin's thoughtfulness, transparency, and deep knowledge made the experience as seamless as possible. Justin has a unique blend of IQ+EQ that allowed him to form an understanding of our individual/collective personalities and priorities in finding a home. When it came time to navigate the co-op process, Justin's thoroughness and attention-to-detail were critical in getting our board application across the finish line. Justin is a joy to work with, and we consider ourselves lucky to have had his expertise and kind nature guiding us along the way! We whole-heartedly recommend Justin to anyone looking for their next home in NYC."

Turner & Laura

"I can't say enough positive things about working with Justin Duffy. He is very professional, knowledgeable, friendly, warm and extremely dependable. He immediately responded to my many calls and texts regardless of the time of day. Although I know he was busy with other clients, he always made me feel like my little apartment was his number one ... (read more)
"I can't say enough positive things about working with Justin Duffy. He is very professional, knowledgeable, friendly, warm and extremely dependable. He immediately responded to my many calls and texts regardless of the time of day. Although I know he was busy with other clients, he always made me feel like my little apartment was his number one priority. Additionally, he possesses excellent verbal and written communication skills. A smart, personable and funny young man, Justin is a credit to his chosen profession and a genuine pleasure to work with. I will happily sing his praises to all my friends, colleagues and neighbors. If you are looking to sell or buy a place in Manhattan or if you are looking to rent out your apartment, you won't regret choosing Justin Duffy."

Pam T.