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Mark Hannigan

Mark Hannigan
Real Estate Agent (Corporate Broker)
Hauppauge NY

Corporate Broker (NY: 10311200818)

27 years experience

REALTOR® 2 Active Listings Serves Suffolk County, NY
View on Realtor.com

Contact Information

Brokerage
Realty 123 Inc

Office Website
Office Address
700 Veterans Mem Hway Ste 307
Hauppauge, NY  11788
(Suffolk County)
Office Phone
631-766-5959
Office Fax
631-415-1163
Mobile
631-766-5959
Email
lire*******@*****.com
Show Email for $5

Service Areas

East Norwich: NY Muttontown: NY Oyster Bay: NY Farmingdale: NY Old Bethpage: NY East Farmingdale: NY South Farmingdale: NY Bethpage: NY Wyandanch: NY Plainedge: NY Huntington: NY Huntington Bay: NY West Hills: NY Lloyd Harbor: NY Huntington Station: NY Greenlawn: NY Halesite: NY Elwood: NY Cold Spring Harbor: NY Dix Hills: NY Melville: NY South Huntington: NY Wheatley Heights: NY Islip: NY Central Islip: NY Islip Terrace: NY North Great River: NY Old Westbury: NY Jericho: NY New Hyde Park: NY Elmont: NY North New Hyde Park: NY Queens: NY New York: NY Franklin Square: NY Stewart Manor: NY Floral Park: NY Bellerose: NY Bellerose Terrace: NY South Floral Park: NY Levittown: NY North Lindenhurst: NY West Babylon: NY Lindenhurst: NY Copiague: NY North Valley Stream: NY Alden Manor: NY Meacham: NY North Massapequa: NY Seaford: NY East Massapequa: NY Massapequa: NY Glen Oaks: NY Massapequa Park: NY Garden City South: NY Malverne Park Oaks: NY Manhasset: NY Lake Success: NY University Gardens: NY Mill Neck: NY Russell Gardens: NY Great Neck Plaza: NY Great Neck: NY Great Neck Gardens: NY Saddle Rock: NY Thomaston: NY Saddle Rock Estates: NY Great Neck Estates: NY Kensington: NY Miller Place: NY Mount Sinai: NY Coram: NY Nesconset: NY Lake Ronkonkoma: NY Kings Point: NY Harbor Hills: NY Northport: NY Asharoken: NY Eatons Neck: NY East Northport: NY Fort Salonga: NY Saltaire: NY Ocean Beach: NY Fire Island: NY Cove Neck: NY Upper Brookville: NY Matinecock: NY Laurel Hollow: NY Centre Island: NY Oyster Bay Cove: NY Plandome Heights: NY Flower Hill: NY Plandome Manor: NY Plandome: NY North Hills: NY Munsey Park: NY Manhasset Hills: NY Garden City Park: NY Hillside Manor: NY Herricks: NY Selden: NY Port Jefferson Station: NY Terryville: NY Port Washington: NY Baxter Estates: NY Port Washington North: NY Manorhaven: NY Sands Point: NY Centereach: NY Ronkonkoma: NY Holbrook: NY Holtsville: NY Farmingville: NY St. James: NY Smithtown: NY Head of the Harbor: NY Nissequogue: NY North Wantagh: NY Inwood: NY Commack: NY Hauppauge: NY Village of the Branch: NY Syosset: NY Hicksville: NY Astoria: NY North Bellmore: NY Wantagh: NY Long Island City: NY Manhattan: NY Brooklyn: NY Woodbury: NY Plainview: NY New Cassel: NY Bridgehampton: NY College Point: NY Bayside: NY Little Neck: NY Flushing: NY Ridgewood: NY Jamaica: NY Addisleigh Park: NY Saint Albans: NY Howard Beach: NY South Ozone Park: NY Rosedale: NY Bellerose Manor: NY Queens Village: NY Mineola: NY Garden City: NY Williston Park: NY East Williston: NY Searingtown: NY Albertson: NY Roslyn Heights: NY East Atlantic Beach: NY Atlantic Beach: NY South Hempstead: NY Baldwin: NY Oceanside: NY Baldwin Harbor: NY North Baldwin: NY Westbury: NY Carle Place: NY Woodmere: NY Cedarhurst: NY East Rockaway: NY Bay Park: NY Freeport: NY Merrick: NY Roosevelt: NY Village of Garden City: NY Uniondale: NY Glen Cove: NY Glen Head: NY Old Brookville: NY Glenwood Landing: NY Brookville: NY Roslyn Harbor: NY East Hills: NY Roslyn: NY Greenvale: NY Hempstead: NY West Hempstead: NY Rockville Centre: NY Lakeview: NY East Meadow: NY Hewlett Bay Park: NY Hewlett Harbor: NY Hewlett: NY Barnum Island: NY Island Park: NY Harbor Isle: NY Woodsburgh: NY Lawrence: NY Lido Beach: NY Long Beach: NY North Lynbrook: NY Lynbrook: NY Malverne: NY Bellmore: NY North Merrick: NY Point Lookout: NY Roslyn Estates: NY Sea Cliff: NY Valley Stream: NY South Valley Stream: NY Hewlett Neck: NY Wave Crest: NY Far Rockaway: NY Edgemere: NY Arverne: NY Broad Channel: NY Breezy Point: NY Rockaway Point: NY North Amityville: NY Gilgo: NY Amityville: NY North Babylon: NY Gilgo Beach: NY Oak Beach: NY Captree Island: NY Oak Beach-Captree: NY Oak Island: NY West Gilgo Beach: NY Babylon: NY Kismet: NY Fair Harbor: NY West Bay Shore: NY North Bay Shore: NY West Islip: NY Brightwaters: NY Point O Woods: NY Bay Shore: NY Baywood: NY Brentwood: NY Bayville: NY Bayport: NY Blue Point: NY Bohemia: NY Sayville: NY Centerport: NY Gordon Heights: NY Deer Park: NY East Islip: NY Great River: NY Setauket: NY Stony Brook: NY East Setauket: NY Poquott: NY Setauket-East Setauket: NY Old Field: NY Stony Brook University: NY Medford: NY Islandia: NY Kings Park: NY Lake Grove: NY Middle Island: NY Yaphank: NY North Bellport: NY Rocky Point: NY Oakdale: NY West Sayville: NY Patchogue: NY Davis Park: NY East Patchogue: NY North Patchogue: NY Belle Terre: NY Port Jefferson: NY Shoreham: NY Cherry Grove: NY East Shoreham: NY Ridge: NY Sound Beach: NY Sunnyside: NY Wading River: NY Calverton: NY Jamesport: NY Northville: NY Riverhead: NY Eastport: NY Riverside: NY Aquebogue: NY Flanders: NY Northampton: NY Amagansett: NY Napeague: NY Manorville: NY Baiting Hollow: NY Center Moriches: NY East Moriches: NY Moriches: NY Mattituck: NY Cutchogue: NY Springs: NY East Hampton: NY East Hampton North: NY Northwest Harbor: NY Wainscott: NY East Marion: NY Remsenburg-Speonk: NY East Quogue: NY Quogue: NY Greenport West: NY Greenport: NY Shinnecock Hills: NY 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About Mark Hannigan

Since 1999, Mark has been dedicated to assisting homeowners and prospective buyers throughout Long Island. He prioritizes delivering precise and timely information, ensuring his clients remain well-informed about the latest market trends. Mark's innovative programs, including the Flex Fee Commission Program and the Flat Fee - For Sale By Owner Program for sellers, as well as the Preferred Buyer Program for buyers, provide unique advantages that are unmatched in the industry.

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

$2,171,890
Avg. Listing Price
From Mark's portfolio
4.0 / 3.1
Avg. Beds/Baths
Typical property size
5,446 sf
Avg. Square Footage
Interior living space
4472
Active Listings
Current inventory

Suffolk County's real estate market represents one of New York's most dynamic and diverse property landscapes, stretching across Long Island's eastern expanse from bustling suburban communities to exclusive waterfront estates. With 9,107 total actively licensed agents serving the region, this market demonstrates remarkable depth and professional expertise, reflecting the county's complex mix of residential neighborhoods, commercial districts, and luxury coastal properties that attract buyers from across the metropolitan area.

The sheer scale of professional representation in Suffolk County reveals a market that operates at institutional levels, where every one of the 9,107 agents maintains email connectivity, enabling rapid communication and deal coordination across multiple price points and property types. This extensive network of licensed professionals supports everything from first-time homebuyer transactions in communities like Brentwood and Central Islip to multi-million dollar estate sales in the Hamptons, creating a sophisticated ecosystem that responds quickly to market shifts and seasonal demand patterns.

Major Suffolk County, New York Real Estate Markets

The county's real estate activity concentrates heavily around several key metropolitan areas, with Huntington, Babylon, and Islip serving as major commercial and residential hubs that drive significant transaction volume. These central markets feature diverse housing stock ranging from post-war suburban developments to newly constructed luxury communities, while coastal areas like Southampton, East Hampton, and Montauk command premium pricing due to their proximity to beaches and seasonal rental potential that attracts both permanent residents and investment buyers.

Emerging markets in communities such as Patchogue, Riverhead, and Greenport have experienced surprising growth as buyers seek more affordable alternatives to traditional high-end areas, creating opportunities for agents specializing in value-oriented transactions and redevelopment projects. The contrast between these developing markets and established luxury zones like Sag Harbor creates multiple distinct real estate ecosystems within the county, each requiring specialized knowledge and different marketing approaches.

Market Dynamics and Geographic Complexity

Suffolk County's real estate market operates with distinct seasonal patterns that significantly impact pricing and inventory levels, particularly in eastern coastal communities where summer demand can drive rental rates up by 300% compared to winter months. This seasonality creates unique challenges for agents who must navigate fluctuating buyer preferences, vacation home purchases, and the complex interplay between permanent resident sales and investment property transactions that define much of the county's higher-end market activity.

Geographic complexity adds another layer of market sophistication, as properties just miles apart can vary dramatically in value due to school district boundaries, flood zone designations, and proximity to transportation corridors like the Long Island Rail Road. Agents must possess hyperlocal expertise about everything from septic regulations in rural areas to co-op board requirements in more developed communities, making market knowledge extremely specialized and location-dependent.

Why Businesses Need Suffolk County, New York Agent Contact Data

Companies serving the real estate industry can leverage Suffolk County's comprehensive agent database to reach professionals handling transactions across dramatically different price points and property types, from affordable housing initiatives to luxury estate sales exceeding $10 million. This diversity creates opportunities for businesses offering everything from basic transaction management tools to sophisticated wealth management services, as agents require different solutions depending on their specific market segments and client demographics.

The complete email accessibility across all 9,107 licensed agents enables businesses to execute targeted marketing campaigns that can be customized by geographic area, specialization, or transaction volume, allowing for precise audience segmentation that maximizes response rates and conversion potential in this competitive and professional market environment.

Current Property Listings

As of 2/7/2026, Mark Hannigan has 2 properties for sale in Hauppauge and surrounding areas.

$949,000

Listed 2025-09-09

58-57 41st Dr
Woodside, NY  11377

Beds: 3.0
Baths: 2.0
Sq Ft: 1,200
Single Family Map
View Full Details

$939,000

Listed 2025-06-29

58-55 41st Dr
Woodside, NY  11377

Beds: 3.0
Baths: 1.0
Sq Ft: 1,190
Single Family Map
View Full Details

Current Property Rentals

Mark Hannigan currently has no rental properties available in Hauppauge and surrounding areas. Check back later.