528 Round Hill Road, Back CountryGreenwich, CT 06830MLS Number 24150732

  • Price: $18,999,000
  • Est. Mortgage of $/month
  • 33 Days on Market
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Federal 30-year interest rate: 6.0% last updated on Mar 5, 2026
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528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830528 Round Hill Road Greenwich CT 06830
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  • 6Bedrooms
  • 4Acreage
  • 13Bathrooms
  • 2026Year Built

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Stunning New Construction. A Grand Estate of Architectural Distinction. This Incredible new build was Conceived and Constructed without Compromise. A build of enduring significance beautifully set on 4 acres. Spanning 17,197 square feet, this residence achieves extraordinary vertical volume with 11-foot ceilings on the main level and a breathtaking two-and-a-half-story family room framed by floor-to-ceiling glass. The main level features a Chef's kitchen with an oversized 14-foot island, a glass-enclosed wine room, a stately library and a first floor guest suite. Upstairs, the private primary wing offers a dramatic atrium, vaulted ceilings, and "boutique" level his-and-hers closets. The walk-out lower level with 11 foot ceilings serves as a private resort-level retreat, featuring a glass-enclosed fitness center, a serene octagonal meditation room, and a state-of-the-art golf simulator. Outside, a 3,200-square-foot multi-level masonry terrace leads to a resort-style pool and a fully appointed pool house with a wood-burning fireplace. This estate features a black slate roof, Marvin high-performance windows, and intelligent luxury systems including a Lutron smart lighting system, a 38KW standby generator, and electric vehicle charging. This purpose built masterpiece is designed to stand apart in one of Greenwich's most prestigious settings. Completion expected spring of 2027.
Listed by Kathryn Bates of Compass Connecticut,LLC ((203) 554-1143)

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Basic Information

  • MLS Number24150732
  • StatusACT
  • List Price$18,999,000
  • Square Feet20,697
  • Property TypeSingle Family For Sale

Building

  • Full Bath12
  • Half Baths1
  • BasementFull, Fully Finished
  • Attic descriptionFinished, Walk-up
  • AtticYes
  • Garage Spaces4
  • Bedrooms6
  • Bathroom13
  • Year Built2026
  • Property StyleColonial
  • Fireplaces4
  • FoundationConcrete
  • Garage Parking InfoAttached Garage
  • New construction typeNo/Resale

Other

  • Appliances Included
    • Dishwasher
    • Dryer
    • Gas Cooktop
    • Gas Dryer
    • Gas Range
    • Microwave
    • Refrigerator
    • Washer
    • Wine Chiller
  • Original listprice$18,999,000
  • Date Listed02/06/2026
  • View Count1

Tax Information

  • Assessed value$1,408,750
  • Milrate total12
  • Tax YearJuly 2025-June 2026
  • Taxes$16,961

Location

  • StateCT
  • Zip06830
  • CountyFairfield
  • NeighborhoodBack Country

Interior

  • Rooms16
  • Interior featuresAudio System, Auto Garage Door Opener, Cable - Available, Open Floor Plan, Security System
  • RoofSlate
  • Home automationBuilt In Audio, Security System

Utilities

  • Waters ourcePrivate Well
  • Cooling SystemCentral Air
  • Hot water descriptionPropane, Tankless Hotwater
  • Heating FuelPropane
  • Fuel tank locationIn Ground
  • Heat SystemHot Air
  • Sewage systemSeptic

School Information

  • Elementary SchoolParkway
  • High SchoolGreenwich

Rooms

  • Laundry room locationSecond Floor
  • Laundry room infoUpper Level

Property

  • Acreage4
  • Lot DescriptionProfessionally Landscaped
  • Parking Spaces
  • SwimmingpoolYes
  • Pool descriptionHeated, Pool House, In Ground Pool

Exterior

  • ColorWhite
  • Exterior sidingShingle, Cedar

Amenities

  • Other AmenitiesBasement, Fireplace, Pool, Golf, Waterfront

Water Body

  • Waterfront DescriptionNot Applicable

Legal

  • ZoningRA-4
  • Home warranty offeredYes
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