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  • Zillow Home logoZestimate®
    $4,805,800

    20 Oak St, Greenwich, CT 06831

    5beds
    8,603sqft
    Single Family Residence
    Built in 2004
    0.7 Acres Lot
    $4,805,800 Zestimate®
    $559/sqft
    $-- Estimated rent

    Home value

    $4,805,800

    $4.57M - $5.05M

    Not available

    Zestimate® history
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    What's special

    Wood-burning fireplaceMultiple fireplacesTwo-car polyphasic garageExpansive wraparound bay windowsExtensive custom cabinetryLarge center islandWine cellar

    Set on a quiet private lane, this 8,600-square-foot residence spans four finished levels with elevator access throughout. A marble entry gallery with soaring ceilings introduces expansive living and entertaining spaces, including a formal dining room with wet bar, chef's kitchen with Viking, Bosch, and Sub-Zero appliances, and a sunlit family room opening to outdoor dining areas. The home offers five en-suite bedrooms with walk-in closets, including a luxurious primary suite with fireplace and spa bath. The finished walkout lower level features a recreation lounge, wine cellar, fitness studio, media space, and full bath. Additional highlights include hardwood floors, multiple fireplaces, private office space, and mature landscaping throughout the property. 5 minutes from Greenwich Avenue. Set on a private lane of just three homes, this expansive residence offers 8,600 square feet of living space across four finished levels, all accessible by elevator. A marble-floored entry gallery with soaring ceilings creates a dramatic first impression, immediately establishing the scale, light, and craftsmanship found throughout the home. The main level is designed for both grand entertaining and comfortable everyday living. A formal living room is framed by expansive wraparound bay windows, filling the space with natural light. Wide pocket doors open to an elegant formal dining room featuring a wet bar. The chef's kitchen is outfitted with high-end appliances, including a Viking six-burner cooktop with grill, dual wall ovens, dual Miele dishwashers, and Sub-Zero refrigeration. A large center island anchors the space and flows seamlessly into a sunlit breakfast area and spacious family room. French doors open to generous outdoor entertaining and dining areas. A wood-burning fireplace enhances the warmth of the main living area. Additional features include a private office with dual workspace capacity and French doors to the outdoors, multiple wet bars, two powder rooms, and hardwood flooring throughout. The bedroom level offers five spacious bedrooms each with en-suite bath and walk in closet. The fifth bedroom is oversized and flexible, suitable as a bonus room, playroom, or studio. The primary suite is a private retreat featuring a third wood-burning fireplace, heated bathroom floors, a BainUltra air-jet soaking tub, oversized shower, private water closet, and extensive custom cabinetry. The walkout lower level is fully finished and designed as a true lifestyle extension of the home. It features a large recreation lounge with wet bar, a dedicated wine room with tasting area, a media space with fireplace, a mirrored fitness studio with TV, and a full bath--creating an ideal setting for both relaxation and entertainment. The top floor provides full-height ceilings and exceptional flexibility, ideal for use as a studio, office, playroom, or additional guest space, complete with a full bath and storage. A two-car polyphasic garage complete the property, which is surrounded by mature landscaping in a serene residential setting just 5 minutes to Greenwich Avenue.

    This property is not currently displayed as for sale or rent on Zillow. This may be different from what's on other websites or public sources.

    Zillow last checked:

    Source: Halstead / Brown Harris Stevens,MLS#: 125038MLS Logo

    Facts & features

    Interior

    Bedrooms & bathrooms
    • Bedrooms: 5
    • Bathrooms: 8
    • Full bathrooms: 7
    • 1/2 bathrooms: 1
    Features
    • Has basement: No
    • Has fireplace: Yes
    • Fireplace features: Wood Burning
    Interior area
    • Total structure area: 8,603
    • Total interior livable area: 8,603 sqft

    Property

    Parking
    • Parking features: Garage
    • Has garage: Yes
    Lot
    • Size: 0.7 Acres
    Details
    • Parcel number: GREEM03B1879S

    Construction

    Type & style
    • Home type: SingleFamily
    • Property subtype: Single Family Residence
    Condition
    • Year built: 2004

    Community & HOA

    Community
    • Subdivision: Greenwich
    Location
    • Region: Greenwich

    Financial & listing details

    • Price per square foot: $559/sqft
    • Tax assessed value: $2,543,310
    • Annual tax amount: $31,433
    • Date on market: 5/19/2026
    • Lease term: Contact For Details

    Price history

    DateEventPrice
    10/6/2026Listing removed$4,950,000$575/sqft
    Source: Halstead / Brown Harris Stevens #125038 Report a problem
    7/31/2026Price change$4,950,000-8.3%$575/sqft
    Source: Greenwich MLS, Inc. #125038 Report a problem
    5/19/2026Listed for sale$5,400,000+113%$628/sqft
    Source: Greenwich MLS, Inc. #125038 Report a problem
    1/12/2023Sold$2,535,000-12.6%$295/sqft
    Source: Greenwich MLS, Inc. #116926 Report a problem
    12/5/2022Pending sale$2,900,000$337/sqft
    Source: Douglas Elliman #CT116926 Report a problem
    12/5/2022Contingent$2,900,000$337/sqft
    Source: Greenwich MLS, Inc. #116926 Report a problem
    10/19/2022Price change$2,900,000-8.8%$337/sqft
    Source: Greenwich MLS, Inc. #116926 Report a problem
    9/28/2022Listed for sale$3,180,000-2.9%$370/sqft
    Source: Greenwich MLS, Inc. #116926 Report a problem
    9/19/2022Listing removed--
    Source: Smart MLS #170431014 Report a problem
    8/9/2022Price change$3,275,000-90%$381/sqft
    Source: Smart MLS #170431014 Report a problem
    8/5/2022Price change$32,750,000+893.3%$3,807/sqft
    Source: OneKey® MLS as distributed by MLS GRID #H6138487 Report a problem
    7/1/2022Listed for sale$3,297,000-5.8%$383/sqft
    Source: Greenwich MLS, Inc. #114202 Report a problem
    8/30/2021Listed for sale$3,500,000+18.6%$407/sqft
    Source: Greenwich MLS, Inc. #114202 Report a problem
    4/7/2006Sold$2,950,000$343/sqft
    Source: Public Record Report a problem

    Public tax history

    YearProperty taxesTax assessment
    2025$31,433 +3.5%$2,543,310
    2024$30,357 +2.2%$2,543,310 -0.4%
    2023$29,709 +0.9%$2,553,180
    2022$29,438 -6.9%$2,553,180 -2.8%
    2021$31,635 +0.2%$2,627,520
    2020$31,583 -1%$2,627,520
    2019$31,898 +2.3%$2,627,520
    2018$31,189 -1.2%$2,627,520
    2017$31,580 +14%$2,627,520 +13.1%
    2015$27,712 +2.6%$2,323,860
    2014$27,015 +2.8%$2,323,860
    2013$26,283 +2.8%$2,323,860
    2012$25,562 +3.4%$2,323,860
    2011$24,726 +1.2%$2,323,860 -14%
    2010$24,424 +3.4%$2,701,790
    2009$23,614 +5.2%$2,701,790 +1.6%
    2008$22,439 +3.6%$2,658,600
    2007$21,668 +29.9%$2,658,600 +19.6%
    2006$16,675 +30.6%$2,223,270 +100.5%
    2005$12,765 +178.9%$1,109,010 +169.4%
    2004$4,577 $411,600
    Find assessor info on the county website

    Neighborhood: 06831

    Nearby schools

    GreatSchools rating
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    Get a Zillow Showcase℠ listing at no additional cost and you could sell for .
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    With Zillow Showcase(estimated)
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