The strategies top buyers use to access properties before they hit the MLS, including the ISO broker network and staggered new development releases
One of the Williamsburg condos I closed, a 3BR/2BA at 30 Bushwick Avenue, reached my buyer through the broker network before the seller committed to a public listing. In my 25+ years brokering deals across NYC, some transactions I closed for clients never had a public listing.
Before you start, get your financing pre-approved and review the due diligence checklist, so you can move the day an opportunity appears and avoid a bidding war.
Off-market means a property that is not publicly listed on Zillow, Realtor.com, StreetEasy or the RLS. Reasons include:
The REBNY Listing Service (RLS) rules limit what brokers can say and do here. A broker cannot encourage an owner to withhold a listing from the RLS, and a listing cannot be described as "Off-Market" in its description. Coming Soon is the sanctioned pre-launch step: up to 14 days, advertised with the showing start date, with no showings or negotiations until it ends.
Off-market deals surface through broker relationships, not search algorithms. ISO stands for "In Search Of": when a broker has a serious buyer whose criteria public inventory cannot fill, they send a short note to a wide network of brokers with neighborhood, bedrooms, price range and must-haves like outdoor space. Responses fall into three buckets:
| Response | What it means for the buyer |
|---|---|
| A listing about to launch | The listing agent can tell you it is coming. Because Coming Soon allows no showings, your edge is being pre-approved and ready to tour on day one. |
| A seller who has not signed a listing agreement | The broker is talking with an owner who may agree to a private conversation before committing to a public listing. |
| A new-development release wave | A broker working an active sponsor knows which units are in the next release before they are widely marketed. |
When I tour a unit with a buyer, I also learn from the listing broker, the doorman and building staff what else is available, what is about to come on the market and what is in renovation. Two patterns come up: units not yet marketed because the owner has decided to sell but not signed a listing agreement, and units in renovation, where some sellers trade a discount for a buyer willing to wait and others sell as-is below the post-renovation comparable.
My client wanted a 3-bedroom Williamsburg condo in a price range where public listings were not delivering. The unit they ended up buying, a 3BR/2BA condo at 30 Bushwick Avenue, never appeared on StreetEasy or Zillow as an active public listing under my representation.
It surfaced through the broker network at a stage where the seller had not committed to a public listing strategy. My buyer reached the unit, walked it, negotiated, and closed through a channel a public-search-only buyer would never have seen.
| Channel | How it works | Watch item |
|---|---|---|
| Neighbors and community groups | Tell people you are looking. Owners often know someone who may sell but has not listed. | Keep it personal and respectful of owners' privacy. |
| Direct mail | A short, personal letter to owners in the buildings or blocks you want, with a follow-up a few weeks later. | Send to specific addresses, not a broad blast. |
| Investors | Local investor groups and clubs sometimes know of properties before they list. | Verify every claim yourself; investors have their own interests. |
| Online alerts | Set alerts on public sites for new and price-change listings. | This finds early listings, not unlisted ones. |
Listed properties while you work your off-market network
122-15 115th Avenue
South Ozone Park
68-12 BURNS Street #A3
Forest Hills
Listing information provided courtesy of the Real Estate Board of New York's Residential Listing Service (RLS). Information is deemed reliable but not guaranteed. Sale listings verified. ©2026 REBNY. RLS data displayed by Keller Williams NYC.
Off-market deals in NYC come through broker relationships, within the RLS rules. Get pre-approved and be ready to move when something surfaces.
Milton Coste is a Licensed Real Estate Associate Broker with Keller Williams NYC, with more than 25 years of experience and 1,100+ NYC property transactions marketed, leased and sold. He works in English and Spanish.
Listings sourced live from REBNY RLS. All listings verified active at time of viewing. Updated daily.
View Active Listings Get Custom SearchThis information is not verified for authenticity or accuracy and is not guaranteed. ©2026 The Real Estate Board of New York, Inc. All rights reserved. Listing data sourced from REBNY RLS. Listing Courtesy of Keller Williams NYC.
Licensed Real Estate Associate Broker · Keller Williams NYC
License No. 10301213304 · 360 Madison Avenue, 9th Floor, NY 10017
Equal Housing Opportunity. We are pledged to the letter and spirit of U.S. policy for the achievement of equal housing opportunity throughout the Nation. Milton Coste and Keller Williams NYC are committed to full compliance with the Federal Fair Housing Act (42 U.S.C. §§ 3601-3619), the New York State Human Rights Law (Executive Law, Article 15), and the New York City Human Rights Law (Title 8, NYC Administrative Code).
MLS & Listing Data Disclaimer: This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc. All rights reserved. Listing information is provided solely for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Listing data sourced from REBNY RLS. Listing Courtesy of Keller Williams NYC.
Financial & Market Data Disclaimer: All financial figures, market statistics, price estimates, and rental rates are sourced from StreetEasy Market Reports and provided for informational purposes only. Market conditions change frequently. This content does not constitute financial, tax, investment, or legal advice. Consult a licensed financial advisor, CPA, or attorney before making financial decisions. Published in accordance with 19 NYCRR Part 175 (NY DOS Real Estate Broker Advertising Regulations). Milton Coste operates as a Licensed Real Estate Associate Broker under the supervision of Keller Williams NYC.
Content published: February 2026 · Milton Coste · Keller Williams NYC · License No. 10301213304
Listed properties while you work your off-market network
579 W 215TH Street #5A
Inwood
799 Carroll Street
Park Slope
Listing information provided courtesy of the Real Estate Board of New York's Residential Listing Service (RLS). Information is deemed reliable but not guaranteed. Sale listings verified. ©2026 REBNY. RLS data displayed by Keller Williams NYC.
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Disclaimer: All information provided in this article is for educational purposes only and does not constitute legal, financial, or real estate advice.
Listing data sourced from the REBNY Residential Listing Service (RLS). Information is deemed reliable but not guaranteed.
Milton Coste is a Licensed Real Estate Associate Broker affiliated with Keller Williams NYC,
360 Madison Avenue, 9th Floor, New York, NY 10017. License No. 10301213304.
Equal Housing Opportunity. This advertisement complies with New York State Department of State regulations
governing real estate advertising. © 2026 Milton Coste. All rights reserved.
Image Disclosure: Header images on this blog are AI-generated editorial illustrations and do not depict specific properties for sale or rent.
Milton Coste
Licensed Real Estate Associate Broker · Keller Williams NYC
License No. 10301213304 · 360 Madison Avenue, 9th Floor, New York, NY 10017
