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Rosemary O Neill

Rosemary O Neill
Real Estate Agent (Salesperson)
Manhasset NY

Salesperson (NY: 40ON0847850)

30 years experience

REALTOR® 1 Active Listings Serves Nassau County, NY
View on Realtor.com

Contact Information

Brokerage
Daniel Gale Sotheby's International Realty

Office Website
Office Address
364 Plandome Rd
Manhasset, NY  11030
(Nassau County)
Office Phone
516-883-2900
Office Fax
Mobile
516-578-3099
Email
rose**********@**********.com
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Service Areas

Thomaston: NY Manhasset: NY Plandome Heights: NY Flower Hill: NY Plandome Manor: NY Plandome: NY North Hills: NY Munsey Park: NY Port Washington: NY Baxter Estates: NY Port Washington North: NY Manorhaven: NY Sands Point: NY East Hills: NY Roslyn Estates: NY Glenwood Landing: NY Searingtown: NY Roslyn: NY Roslyn Harbor: NY Village of Garden City: NY Garden City: NY Uniondale: NY Garden City South: NY Stewart Manor: NY Westhampton Beach: NY Westhampton: NY East Quogue: NY Fire Island: NY West Hampton Dunes: NY Flanders: NY Quiogue: NY Northampton: NY

About Rosemary O Neill

Rosemary has been a dedicated real estate professional since 1997, earning recognition as a Top Producer for nearly two decades. Her expertise encompasses residential sales, luxury homes, first-time homebuyers, and commercial properties. With an in-depth understanding of Manhasset and Port Washington, her knowledge also spans the broader North Shore of Long Island, including Garden City and Westhampton Beach.

A lifelong resident of Manhasset, Rosemary returned to her hometown after completing her studies at New York University, motivated by a desire for her children to experience the same enriching environment she enjoyed—characterized by its natural beauty, outstanding schools, and convenient access to New York City.

In addition to her real estate endeavors, Rosemary is actively involved in her community. She has held positions on various boards, including the Manhasset Women’s Coalition Against Breast Cancer, the Manhasset High School Booster Club, AHRC, and the IHM Board for Our Lady of Grace Montessori School. She has also contributed as a CCD teacher at St. Mary’s Parish.

Before embarking on her real estate career, Rosemary spent many years teaching at both the high school and college levels. Her background in education has seamlessly translated into her real estate practice, where her commitment, integrity, and professionalism are highly valued by clients and colleagues alike.

Nassau County, NY Real Estate Market Analysis (Single Family Homes)

$1,425,813
Avg. Listing Price
From Rosemary's portfolio
4.1 / 3.0
Avg. Beds/Baths
Typical property size
2,471 sf
Avg. Square Footage
Interior living space
3105
Active Listings
Current inventory

Nassau County's real estate market represents one of New York's most dynamic and valuable suburban landscapes, with properties consistently ranking among the highest-priced in the nation. This Long Island powerhouse attracts buyers seeking premium coastal living, top-tier school districts, and convenient Manhattan access, creating a marketplace where million-dollar homes are commonplace and inventory moves quickly despite premium pricing.

The county's real estate ecosystem supports 11,944 total actively licensed agents, with all 11,944 agents maintaining email contact information, reflecting the market's technological sophistication and professional connectivity. This robust agent network serves diverse communities from Hempstead's affordable starter homes to Old Westbury's sprawling estates, each requiring specialized market knowledge and relationship management.

Major Nassau County, New York Real Estate Markets

The Gold Coast communities of Manhasset, Port Washington, and Roslyn dominate Nassau's luxury segment, where historic estates and waterfront properties command prices exceeding $3 million. Meanwhile, established neighborhoods like Garden City, Rockville Centre, and Westbury offer premium suburban living with strong resale values, while emerging markets in Freeport and Uniondale present opportunities for first-time buyers and investors seeking appreciation potential.

Nassau's geography creates distinct micro-markets along the North Shore's prestigious waterfront communities versus the South Shore's beach-adjacent neighborhoods like Long Beach and Atlantic Beach. Each region maintains unique pricing dynamics, with proximity to transportation hubs like the Long Island Rail Road stations significantly impacting property values and market velocity throughout communities from Great Neck to Hicksville.

Market Dynamics and Geographic Complexity

Nassau County's real estate market operates on compressed inventory cycles, where desirable properties in sought-after school districts like Jericho or Syosset often receive multiple offers within days of listing. This competitive environment demands agents who understand hyperlocal nuances, from flood zone implications in waterfront areas to the impact of property taxes that can exceed $30,000 annually on premium homes.

The market's complexity extends beyond pricing to encompass co-op buildings in communities like Great Neck Plaza, new construction developments in previously industrial areas, and the ongoing conversion of larger estates into luxury subdivisions. These varied property types require agents with specialized expertise in everything from co-op board approval processes to new construction warranties and municipal approval procedures.

Why Businesses Need Nassau County, New York Agent Contact Data

Mortgage lenders, home inspection companies, and luxury service providers targeting Nassau County's affluent market need direct access to the county's extensive agent network to capture high-value transactions. With average home prices significantly exceeding national norms, each successful business relationship with local agents can generate substantial revenue through premium-priced services and repeat referral opportunities.

Technology companies, marketing firms, and financial services businesses benefit from connecting with Nassau's digitally-connected agent community to introduce innovative tools and services. Given the market's competitive nature and sophisticated clientele, agents actively seek resources that provide competitive advantages, creating opportunities for B2B companies offering everything from virtual staging software to client management platforms and investment analysis tools.

Current Property Listings

As of 2/13/2026, Rosemary O Neill has 1 property for sale in Manhasset and surrounding areas.

$1,775,000

Listed 2026-01-13

2 Stonytown Rd
Manhasset, NY  11030

Beds: 5.0
Baths: 2.5
Sq Ft: 3,320
Lot: 17,498 sf
Single Family Map
View Full Details

Current Property Rentals

Rosemary O Neill currently has no rental properties available in Manhasset and surrounding areas. Check back later.