William R. Kowalczuk
Real Estate Professional
Licensed Assoc. Real Estate Broker
Bill Kowalczuk is a top residential broker with over 20 years of industry experience. He is ranked among the top performing real estate associates at Warburg and nationwide due to his exceptional market expertise, high standard of customer service, and the impressive results that he consistently delivers to all of his clients.

Bill’s knowledge and efficiency working through complex transactions is continuously acclaimed by the buyers, sellers, renters, and investors that have worked with him. Each of Bill’s clients can attest to his dedication to service and results-driven work ethic, which is a testament to his strong referral and repeat business. From marketing luxury lofts and townhouses to managing new development sales throughout Manhattan, Bill is in tune with the dynamic local marketplace and is ready to connect his clients with the perfect property for them. Bill also provides valuable expertise to multi-unit investment buyers, covering all aspects from pricing and amenities, to layouts and design features.

A native New Yorker and born in Queens, Bill has lived and worked in many different neighborhoods around NYC. Bill has an innate understanding of what makes each neighborhood of Manhattan truly unique. Before entering the real estate field, Bill lived in Puerto Rico in the late 1980’s, where he operated a travel business as well as working in the luxury hotel field. In his free time Bill enjoys wine, fine dining, and expeditions that involve skydiving, kayaking and mountain biking.

Press

11.3.22
Brick Underground
Bill Kowalczuk, a broker at Coldwell Banker Warburg, says while he doesn’t see this situation often, a landlord is within their rights to ban you from hanging items on walls. And even if your landlord doesn’t prohibit you… More
8.29.22
MarketWatch
I’m a 68-year-old single, retired nurse. I own a condo that’s worth approximately $450,000 in New York City. I have a nice amount in savings and in investments, worth about $1 million, and a good amount… More
7.15.22
CNBC
After the frenzy of bidding wars, the U.S. housing market is starting to cool, particularly along the West Coast, as mortgage interest rates rise. That’s forcing some sellers to adjust. https://www.cnbc.com/2022/07/15/markets-where-home-sales-are-cooling-fastest.html
7.13.22
CBS
NEW YORK — Inflation in the United States has reached a new 40-year high. Data from the Labor Department shows consumer prices rose 9.1 percent from a year ago, the fastest pace since 1981. https://www.cbsnews.com/newyork/news/new-york-city-inflation-new-high/
6.17.22
CNN
Bill Kowalczuk comments. https://www.dropbox.com/s/g4ggb7s8tds34zw/CNN%206-17-22%20Bill%20Kowalczuk%20-%20mortgage%20rates%206pm.mp4?dl=0  
4.4.22
Fox 5
NEW YORK – New York City renter Gabbie Fried got so fed up that she started posting her frustrations on social media. Fried, an actor, moved into an apartment on the Upper West Side in 2021 after getting a deal… More
3.10.22
Crain's
The availability of apartments for rent in the city has dropped to just 4,541 units—its lowest level for the month of February since 2008. And renters are going toe to toe to secure one of the… More
3.8.22
Brick Underground
There’s a lot of competition for rental apartments in New York City these days, so you might come across a landlord who wants to do a Zoom interview to make sure you’re the responsible type. https://www.brickunderground.com/rent/realty-bites-zoom-online-video-interview-with-landlord-rental-application-process-nyc
2.13.22
New York Times
400 East 56th Street APT. 6A by Andrea Wernick and Bill Kowalczuk featured. https://www.nytimes.com/2022/02/13/realestate/homes-that-sold-for-around-600000.html
11.16.21
StreetEasy
Bill Kowalczuk comments. https://streeteasy.com/blog/how-rent-an-apartment-in-a-townhouse/
10.21.21
Lux Exposé
136 Dean Street, Apartment 4 by Bill Kowalczuk featured and 1 Grace Court, Apartment 5D by Jeanne Byers and George Case featured. https://luxexpose.com/these-brooklyn-homes-check-all-boxes-and-are-under-1-million/
9.21.21
Brick Underground
Becki Danchik and Bill Kowalczuk comment. https://www.brickunderground.com/rent/realty-bites-getting-copy-of-apartment-lease-moving-landlords-brokers-nyc
9.17.21
Mansion Global
9 Murray Street, Apt 7W by Bill Kowalczuk featured. https://www.mansionglobal.com/articles/an-open-loft-with-11-foot-ceilings-and-skyline-views-in-manhattans-tribeca-neighborhood-01631877451
9.15.21
Bloomberg
Bill Kowalczuk and Sarah Minton comment. https://www.bloomberg.com/news/articles/2021-09-15/new-york-city-rents-landlords-jack-up-prices-70-in-lease-renewals-post-covid?sref=5sO1Kzcl
8.26.21
Forbes
Becki Danchik, Ted Karagannis, Parisa Afkhami, Chris Totaro, Bill Kowalczuk, Andrea Wernick, Rowena Dasgupta, Allison Chiaramonte, Wendy Greenbaum, & Jason Haber comment, 40 East 78th Street 6G by Wendy Greenbaum, 174 East 74th Street 14-AG by… More
8.9.21
Brick Underground
Bill Kowalczuk comments. https://www.brickunderground.com/rent/when-should-i-start-looking-for-rental-apartment-nyc
8.5.21
Brick Underground
Bill Kowalczuk comments. https://www.brickunderground.com/rent/realty-bites-neighbor-taking-over-hallway-with-bikes-strollers-clothes-landlords-leases-fire-safety-nyc
7.23.21
The Close
Featured Properties: 196 East 75th Street, 17B; 235 East 87th Street, 11B; and 242 East 19th Street, 2FG by Rachel Lustbader 400 East 56th Street, 26K by Andrea E. Wernick and Bill Kowalczuk https://theclose.com/virtual-staging-software/
7.22.21
Brick Underground
Bill Kowalczuk and Steve Gottlieb comment. https://www.brickunderground.com/rent/realty-bites-401-k-proof-of-income-rental-applications-renters-landlords-brokers-nyc
7.9.21
Money.com
Bill Kowalczuk comments. https://money.com/homebuyer-burnout-houisng-competition/
7.7.21
Lux Exposé
9 Murray Street, Apartment 7W by Bill Kowalczuk featured. https://luxexpose.com/enjoy-views-of-the-freedom-tower-from-this-4-15m-tribeca-loft/
6.11.21
Lux Exposé
444 East 57th Street, Apartment 3D by Andrea Wernick and Bill Kowalczuk featured. https://luxexpose.com/this-spacious-sutton-place-apartment-is-on-the-market-for-1-645m/
6.1.21
BrickUnderground
Bill Kowalczuk and Steven Goldschmidt comment. https://www.brickunderground.com/rent/realty-bites-broker-landlord-relists-apartment-different-unit-number-red-flag-scam-nyc
4.15.21
StreetEasy
Becki Danchik, Bill Kowalczuk, and Jeremy Kamm comment. https://streeteasy.com/blog/how-to-rent-an-apartment-without-a-job/  
3.26.21
Wall Street Journal
3.23.21
Brick Underground
Bill Kowalczuk, Rowena Dasgupta, Elizabeth O’Neill, and Christopher Totaro comments. https://www.brickunderground.com/sell/governor-cuomo-covid-vaccine-eligibility-means-for-buyers-sellers-renters-renovating-nyc
3.16.21
Curbed
Mihal Gartenberg and Bill Kowalczuk comment. https://www.curbed.com/2021/03/manhattan-rental-deals-window-closing.html
3.4.21
StreetEasy
Rowena Dasgupta and Bill Kowalczuk comment. https://streeteasy.com/blog/selling-and-buying-a-home-at-the-same-time/
3.2.21
Bloomberg
Bill Kowalczuk comments. https://www.bloomberg.com/news/articles/2021-03-02/new-york-real-estate-rent-drops-and-covid-deals-draw-bargain-hunters-to-nyc?sref=5sO1Kzcl
2.28.21
Real Homes
Mihal Gartenberg, Bill Kowalczuk, Karen A. Kostiw, and Parisa M. Afkhami comments. https://www.realhomes.com/us/news/the-one-reason-you-should-always-walk-away-from-a-home-sale-according-to-realtors
2.25.21
Forbes
Bill Kowalczuk comments. https://www.forbes.com/sites/lisachamoff/2021/02/25/thinking-of-listing-your-home-on-airbnb-real-estate-experts-share-their-top-tips/?sh=6005a6d5403b
2.16.21
Brick Underground
Bill Kowalczuk comments. https://www.brickunderground.com/rent/where-to-find-generous-rental-concessions-in-nyc-now-queens-brooklyn-manhattan-luxury
1.18.21
Hunker
Becki Danchik and Bill Kowalczuk comments. https://www.hunker.com/13730973/these-9-kitchen-dirt-traps-may-cost-renters-money-upon-moving-out
11.30.20
OfftheMrkt
73-12 35 Avenue, Apartment C4 by Bill Kowalczuk and Jordan Ku featured. https://www.offthemrkt.com/blogs/our-favorite-listings-for-the-week-11-30-2020
11.27.20
Lux Exposé
73-12 35 Avenue, Apartment C4 by Bill Kowalczuk and Jordan Ku featured. https://luxexpose.com/live-like-royalty-in-queens-in-this-apartment-right-on-the-c-line/
11.26.20
Forbes
1020 Park Avenue, Apt. 6A by June Gottlieb, Steven Gottlieb and Emily Becker //20 Pine Street, Ph. 250 by Christopher Totaro and Kemdi Anosike// 315 Seventh Avenue, Apt. 8A by Samantha Rose Frith, Joel E. Moss,… More
11.16.20
Inman
Bill Kowalczuk comments. https://www.inman.com/2020/11/16/what-a-vaccine-could-mean-for-the-us-housing-market-and-real-estate/
11.13.20
StreetEasy
Bill Kowalczuk comments. https://streeteasy.com/blog/how-to-find-a-roommate-in-nyc/  
10.23.20
1010 WINS
Bill Kowalczuk comments. https://www.radio.com/1010wins/news/local/median-rent-in-manhattan-falls-below-usd3-000-report
10.23.20
The New York Times
Bill Kowalczuk comments. https://www.nytimes.com/2020/10/23/realestate/new-york-real-estate.html
10.8.20
6sqft
84 Grove Street #12B by Bill Kowalczuk and 200 Chambers Street 6J by Mary Hall Mayer featured. https://www.6sqft.com/6-nyc-apartments-with-outdoor-space-you-can-rent-for-less-than-5000month/
9.27.20
USA Today
Bill Kowalczuk comments. https://www.usatoday.com/story/money/2020/09/28/rent-where-rents-rising-and-falling-most-big-cities/3519979001/
9.25.20
StreetEasy
Bill Kowalczuk & Rowena DasGupta comment. https://streeteasy.com/blog/selling-and-buying-a-home-at-the-same-time/
8.28.20
The Close
Featured listings: 196 East 75th Street, 17B and 400 East 56th Street, Apt 26K by Andrea Wernick and Bill Kowalczuk. 235 East 87th Street, 11B and 242 East 19th Street, 2FG by Rachel Lustbader. https://theclose.com/virtual-staging-software/
8.28.20
My Affordable Luxury
73-12 35 Avenue, C64 by Bill Kowalczuk and Jordan Ku featured. Property of the Week – Beautiful One Bedroom Apartment in Jackson Heights, NY
8.21.20
City Realty
73-12 35th Avenue, #C64 by Bill Kowalczuk and Jordan Ku mentioned. https://www.cityrealty.com/nyc/market-insight/features/great-listings/steals-deals-new-nyc-listings-399k/45661
8.19.20
City Realty
73-12 35th Ave, #64 by Bill Kowalczuk and Kheel Tower image by Samantha Rose Frith and Joel E. Moss featured. https://www.cityrealty.com/nyc/market-insight/features/great-listings/steals-deals-new-nyc-listings-299k/45661
8.14.20
Realtor.com
Bill Kowalczuk comments. https://www.realtor.com/advice/rent/situations-when-breaking-your-lease-makes-sense/
8.13.20
Lux Expose
73-12 35 Avenue, C64 by Bill Kowalczuk and Jordan Ku featured. https://luxexpose.com/jackson-heights-co-op-ensures-youll-never-fight-over-closets-again/
8.13.20
City Realty
73-12 35 Avenue, C64 by Bill Kowalczuk and Jordan Ku featured. https://www.cityrealty.com/nyc/market-insight/features/great-listings/steals-deals-impressive-new-york-apartments-299k/45661
8.11.20
TV Tokyo Japan
Bill Kowalczuk on air. https://txbiz.tv-tokyo.co.jp/wbs/vod/post_207843/
8.5.20
Bloomberg
Bill Kowalczuk comments. https://www.bloomberg.com/news/articles/2020-08-05/manhattan-s-ultra-luxury-rental-market-has-cratered?sref=5sO1Kzcl
8.4.20
StreetEasy
Becki Danchik, Christopher Totaro, and Bill Kowalczuk comments. https://streeteasy.com/blog/rent-concession-guide-for-renters/
7.30.20
Brick Underground
Bill Kowalczuk and Joel Moss comment. https://www.brickunderground.com/buy/buying-apartment-in-building-you-already-live-in-do-still-submit-full-board-package-references-finances-nyc
7.17.20
OfftheMrkt
311 Greenwich Street, Apt 10 AE by Bill Kowalczuk and Jordan Ku featured. https://www.offthemrkt.com/blogs/homes-you-need-to-make-appointments-for-this-weekend-7-17-2020  
7.16.20
OfftheMrkt
35 Vestry St, Apt 5 by Bill Kowalczuk and Jordan Ku featured. https://www.offthemrkt.com/blogs/the-historic-tribeca-loft-youve-been-looking-for
6.30.20
Wall Street Journal
Bill Kowalczuk comments. https://www.wsj.com/articles/new-york-apartment-sales-plunged-in-2q-but-summer-brings-hope-11593540048?mod=searchresults&page=1&pos=1
6.27.20
ABC News
Jason Haber and Bill Kowalczuk comments. https://abcnews.go.com/Business/york-real-estate-market-sees-steep-rise-listings/story?id=71410374
6.22.20
CityRealty
45 Crosby Street, Apt 5S by Catherine Silver Smith and Kathryn Landow featured. 317 East 8th Street and 658 Park Place, Apt 8 by Jamie Fedorko and Jessica Swersey featured. 35 Vestry St, Apt 5 by… More
6.22.20
Lux Expose
35 Vestry St, Apt 5 by Bill Kowalczuk and Jordan Ku featured. https://luxexpose.com/beautiful-brick-arches-and-crisp-white-finishes-in-a-historic-tribeca-loft/  
6.18.20
The New York Times
Bill Kowalczuk comments. https://www.nytimes.com/2020/06/18/realestate/why-rents-havent-dropped-in-new-york-city.html
6.4.20
Wall Street Journal
Bill Kowalczuk comments and his rental listing at 206 East 20th Street featured. https://www.wsj.com/articles/coronavirus-is-sending-luxury-rental-markets-on-a-rollercoaster-ride-11591287680
5.27.20
Hello Giggles
Bill Kowalczuk comments. https://hellogiggles.com/lifestyle/moving-during-coronavirus/
5.14.20
The Close
George Case, Gill Chowdhury, Gerard Splendore, and Bill Kowalczuk comment. How to Talk to Your Clients During the Pandemic: Top Brokers Weigh In
4.22.20
Brick Underground
206 East 20th Street, #3 by Bill Kowalczuk featured. https://www.brickunderground.com/rent/will-apartments-with-office-work-from-home-be-must-have-coronavirus-covid-nyc
4.20.20
Forbes
Bill Kowalczuk and Allison Chiaramonte comment. https://www.forbes.com/sites/amandalauren/2020/04/20/how-stay-at-home-orders-are-affecting-the-real-estate-market/#7cc6dfcb12bd
3.20.20
Apartment Therapy
Bill Kowalczuk, Mihal Gartenberg, and Arlene Reed comment. https://www.apartmenttherapy.com/refinance-low-interest-rates-coronavirus-36736748
3.16.20
CityRealty
400 East 56th Street, #20G by Andrea Wernick and Bill Kowalczuk https://www.cityrealty.com/nyc/market-insight/features/great-listings/from-700k-family-sized-nyc-apartments-priced-sell/42601
3.9.20
Brick Underground
Bill Kowalczuk comments. https://www.brickunderground.com/live/can-you-run-a-business-out-of-your-nyc-apartment
2.27.20
Apartment Therapy
Susan Landau Abrams and Bill Kowalczuk comment. https://www.apartmenttherapy.com/realtors-weirdest-showings-36719936?newsletter_slot=4&utm_source=at_daily&utm_medium=email&utm_campaign=02282020
2.7.20
Inman
Bill Kowalczuk comments. https://www.inman.com/2020/02/07/what-does-a-rental-agent-in-nyc-do-anyway/?utm_source=dailyheadlines&utm_medium=email&utm_campaign=localnewsletter&utm_content=775418_textlink_7_20200210
2.6.20
Gothamist
Bill Kowalczuk comments. https://gothamist.com/news/broker-fees-are-now-illegalheres-how-to-claw-yours-back
1.21.20
Brick Underground
Bill Kowalczuk comments. https://www.brickunderground.com/improve/passive-house-NYC-condo-brownstone-townhouse-green-energy-efficient-indoor-air-quality
11.21.19
Apartment Therapy
Bill Kowalczuk comments. https://www.apartmenttherapy.com/how-to-buy-a-house-with-bad-credit-36669855
11.10.19
Inman
Bill Kowalczuk comments. https://www.inman.com/2019/11/10/dollars-and-sense-3-rules-to-keep-your-financial-health-in-check/
10.19.19
New York Times
Bill Kowalczuk comments.
10.18.19
Apartment Therapy
Robert Rahmanian comments. https://www.apartmenttherapy.com/how-long-does-it-take-to-close-on-a-home-36658609
9.18.19
Realtor.com
Robert Elson and Bill Kowalczuk comment. https://www.realtor.com/advice/buy/what-is-a-buyers-market/
9.13.18
Brownstoner
246 Carlton Avenue by Bill Kowalczuk is featured. https://www.brownstoner.com/real-estate-market/brooklyn-apartments-for-rent-fort-greene-246-carlton-avenue/
9.13.18
Brownstoner
246 Carlton Avenue is featured as a fully furnished apartment in Brooklyn. https://www.brownstoner.com/real-estate-market/brooklyn-apartments-for-rent-fort-greene-246-carlton-avenue/
8.21.18
The Real Deal
Bill Kowalczuk talks about the challenges of selling apartments on the Upper East Side over the summer. https://therealdeal.com/2018/08/21/we-couldnt-give-it-away-why-even-cheap-listings-fell-off-the-market-this-summer/
8.18.18
CNBC
Bill Kowalczuk and Dorothy Schrager are quoted in CNBC about Manhattan neighborhoods that foreign investors are buying. https://www.cnbc.com/2018/08/16/places-where-foreign-investors-are-planting-roots-in-new-york-city.html
6.22.18
Real Estate Weekly
Closing by Annie Cion Gruenberger, Bill Kowalczuk are featured. http://rew-online.com/2018/06/22/done-deals-miller-schulz-go-by-book-park-slope-deal/
10.30.16
Real Estate Weekly
Warburg CEO Frederick Peters, along with Steve Goldschmidt, Camille Duvall-Hero, Susan Fishman, Charles Russell, Brennan Zahler, Jason Haber, Mary Dunne, Maria Daou, and Bill Kowalczuk attend REBNY’s annual Deal of the Year Charity Gala. http://rew-online.com/2016/10/30/in-pictures-rebny-residential-gala-guests/
7.19.16
New York Real Estate Journal
Top Producer Bill Kowalczuk and his partner Brett Compton join Warburg Realty’s growing Flatiron office. https://cre.nyrej.com/kowalczuk-compton-join-warburg-realty-team/

Testimonials

3.24.23
Testimonial from Jakki K.

Last summer, I needed to get my mother a place near me in Park Slope, fast! She had a

month-to-month rental in South Slope, twenty blocks from us, which was taxing for her and for me to drop my baby off for child care. I was working with a great agent, but often, I sent him the leads I found on Street Easy.

 

Then came Joy! Apparently her years of experience in sales take nothing away from her ability in the rental market.

 

Within days, she sent me listings that were within my budget and only a block or two from me.  She reached out to the listing agents, including one agent who pulled her listing off the market within a few minutes of posting it because hundreds of people applied. Joy helped me prep my paperwork and to negotiate in a way that put me ahead of the pack. By the end of that week, my mother had a place on the same street as me, two blocks down.

 

I’m reaching out to Joy for my next home in NYC!

2.28.23
Testimonial from RT

Andrea Wernick made the selling of my co-op a smooth and pleasant experience. She knew exactly what to do at every step of the process and gave excellent guidance.  Andrea and her team marketed the apartment well and showed it often leading to an accepted offer and sale.  Andrea was a pleasure to work with and I would recommend her to anyone looking to sell a NYC co-op.

1.26.23
Testimonial from Susan L.

Dear Susan,

The closing, as you know by now, was successfully completed this afternoon. I just wanted to thank you and Michael for all your help and professionalism in making the sale happen. You were straight and clear with me all through the ups and downs – and your guidance was excellent throughout.

I know you understand that for me this has been bittersweet. But “the team of Susans” worked wonderfully and I am really grateful.

 

1.26.23
Testimonial from Susan Oh

Susan and Michael, Thank you again! This could not have gone so smoothly without you. Both of you are awesome at what you do and thank you for pulling us through this one at the end.

 

1.26.23
Testimonial from Allan and Jeff Rothman

Annie Cion Gruenberger was absolutely fantastic to work with. She walked us through the entire process from preparing, decluttering, pricing, working with the building, lawyers all the way through to a terrific sale that we were thrilled with. She was always professional but I now truly feel she is a friend. I will recommend her to all my family and friends in the future.

1.19.23
Testimonial from Jonathan S.

Mihal was a great help in finding an apartment rental. I was relocating from out of state. She walked me through the process and lined up multiple virtual showings, all on short notice. Her videos and knowledge were very helpful in finding me a place I was comfortable with. Even after signing the lease she followed up multiple times to make sure all was well.

1.17.23
Testimonial from Alica E.

Mihal did an outstanding job assisting us with purchasing our co-op. While we were searching she checked in frequently and sent us lots of listings. When we found “the one” she helped us negotiate a competitive offer. She was a tremendous help getting through the co-op approval process. She guided us through every step and was always available when we had questions or concerns. She also connected us with a great mortgage banker and I doubt we could’ve landed such a deal without Mihal’s connection. She is very caring and committed. We really felt we were in good hands with the entire process with Mihal’s knowledge and expertise.

1.6.23
Testimonial from Chiti P. and Bill K.

We used the Gottlieb Team to sell our last apartment and buy our current one. Both experiences were smooth, efficient and thorough from start to finish. Particularly when it came time for the negotiating part, they smartly managed the process — maximizing our expectations — and provided a calming presence when we needed it. Their professionalism, punctuality and persistence set them apart in the real estate market. If we move again, they’ll be our first call.

12.29.22
Testimonial from Kristina L.

Mihal did a fantastic job assisting us with the purchase of our apartment. Her expertise in the neighborhoods of the market was essential in determining the purchase pricing along with the future resale value. Mihal was involved from start to finish. She gave great advice, did lots of virtual tours and was extremely patient when it came to our hectic travel schedules.

12.22.22
Testimonial from J&J Moya

Dear Andrea, 
We wish to thank you for all your efforts in making the sale of our studio apartment at Plaza 400 successful–and pleasant. From start to finish, we appreciated your sincerity, experience, patience, artistic touches and sound advice. Your impeccable attention to details and your gracious style set you apart and above others in your profession. We especially noted that you treated the sale of our small apartment with the same care you handled your larger listings. 

We would also like to compliment your associate Donald M. Toresco. He was always a gentleman ready and willing to help. We wish him a long and successful career in Real Estate.

Coldwell Banker Warburg is fortunate to have you and Donald on their staff. Andrea, we were fortunate to have you as our Broker.

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