5 Frost Valley Road, Mount Sinai, NY 11766

• 4 beds |
• 3 baths |
• 3,038 sqft

Property Description

Welcome to this exceptional, fully renovated postmodern Colonial nestled north of 25A in desirable Mount Sinai. Showcasing refined craftsmanship and timeless elegance, this magnificent residence offers gleaming hardwood floors and custom moldings throughout, beginning with a breathtaking two-story entry foyer highlighted by a dramatic sweeping staircase. Entertain in style in the formal living room with vaulted ceilings and the elegant, banquet-sized formal dining room - perfect for hosting memorable gatherings. A beautifully appointed home office provides private and sophisticated space for work or study. The heart of the home is the newly renovated chef's kitchen, featuring custom cabinetry, center island, quartz countertops, designer backsplash, professional grade appliances, and a sunny breakfast area with sliders to deck. The kitchen flows seamlessly into the large den with fireplace and floor-to-ceiling windows overlooking the lush, private backyard - creating the perfect setting for both everyday living and entertaining. Upstairs, retreat to the grand primary suite, complete with a tray ceiling, fireplace, and a spa-inspired, newly renovated en-suite bath featuring a custom marble steam shower, mosaic tile flooring, freestanding soaking tub, and double vanity. Three additional generously sized bedrooms and a beautifully updated full bath with double sinks complete the second level. The fully finished walk-out lower level adds incredible living space, offering a fitness room, game room, and media room - ideal for recreation, relaxation, or extended living. Updates Include New A/C & Heating Units (2016), New Water Heater (2017), New Composite Deck (2020), New Pool Liner (2021), New Architectural Roof (2022), New Rear Door Slider & Basement French Doors (2022), New Front Arch Windows & New Front Siding (2023), New Heat Pump for Pool (2023), New Garage Door Openers (2023), New Sump Pump Systems & Battery Back-ups (2024), Newly Renovated Primary Bathroom (2024), Newly Renovated Kitchen, Cooktop, Rangehood, Oven Appliances (2024), New Pool Pump (2025), New Electrical Panel, Meter Box & New Main Line From Street From PSEG (2025), New Driveway & French Drainage System (2025). Step outside to your maintenance-free deck overlooking a spectacular, private resort-style backyard with a heated saltwater inground pool, waterfall feature, and expansive rolling lawn - your own private oasis for entertaining or unwinding in total tranquility.

Listing Status:

Active

Data Last Updated:

March 15, 2026 at 8:20PM

Listing Office:

Signature Premier Properties : 631-751-2111

MLS ID:

962258

Interior

• General: Built-in FeaturesCathedral Ceiling(s)Ceiling Fan(s)ChandelierChefs KitchenCrown MoldingDouble VanityEat-in KitchenEntrance FoyerFormal DiningHigh CeilingsKitchen IslandOpen FloorplanOpen KitchenPrimary BathroomQuartz/Quartzite CountersRecessed LightingSoaking TubStorageTray Ceiling(s)Walk-In Closet(s)
• Appliances: DishwasherDryerElectric OvenGas CooktopMicrowaveRefrigeratorStainless Steel Appliance(s)Washer
• Laundry: Laundry Room
• Basement: FinishedFullStorage SpaceWalk-Out Access
• Flooring: CarpetHardwood
• A/C: Central Air
• Heating: Forced AirNatural Gas
• Fireplace: Family RoomFireplaceFireplaces: 2

Exterior

• General: LightingMailboxRain Gutters
• Style: Colonial
• Pool: Electric HeatIn GroundPool CoverSalt WaterVinyl
• Parking: AttachedDrivewayGarage

Construction

• Windows: Double Pane Windows
• General: Three Or More

Location

• Originating MLS: onekey2
• School District: Mount Sinai
• County: Suffolk County

Lot

• Zoning: 0200-093-00-06-00-034-000
• Fencing: Back YardFenced

Utilities

• Utilities: Cable ConnectedElectricity ConnectedNatural Gas ConnectedTrash Collection PublicUnderground UtilitiesWater Connected
• Water: Public
• Sewer: Cesspool

Financial

• Source: onekey2