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.
For sale
$5,400,000
20 Oak St, Greenwich, CT 06831
5beds
8,603sqft
Residential, Single Family Residence
Built in 2004
0.7 Acres Lot
$5,342,300 Zestimate®
$628/sqft
$-- HOA
What's special
Wood-burning fireplaceMultiple fireplacesTwo-car polyphasic garageExtensive custom cabinetryElevator access throughoutLarge center islandDual wall ovens
- 48 days |
- 1,080 |
- 39 |
Zillow last checked:
Listing updated:
Listed by:
Matthew Tallett 908-763-5836,
Brown Harris Stevens CT, LLC
Source: Greenwich MLS, Inc.,MLS#: 125038
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 9
- Full bathrooms: 7
- 1/2 bathrooms: 2
Heating
- Natural Gas, See Remarks, Forced Air
Cooling
- Central Air
Appliances
- Laundry: Laundry Room
Features
- Sep Shower, Elevator
- Basement: Finished
- Number of fireplaces: 3
Interior area
- Total structure area: 8,603
- Total interior livable area: 8,603 sqft
Property
Parking
- Total spaces: 2
- Parking features: Garage Door Opener
- Garage spaces: 2
Features
- Patio & porch: Terrace, Deck
- Exterior features: Balcony, Rock Garden
Lot
- Size: 0.7 Acres
- Features: Backlot, Level
Details
- Parcel number: 031879/S
- Zoning: R-12
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Colonial
- Property subtype: Residential, Single Family Residence
Materials
- Clapboard, Stone
- Roof: Shingle
Condition
- Year built: 2004
- Major remodel year: 2023
Utilities & green energy
- Water: Public
Community & HOA
Community
- Security: Security System
Location
- Region: Greenwich
Financial & listing details
- Price per square foot: $628/sqft
- Tax assessed value: $2,543,310
- Annual tax amount: $26,664
- Date on market: 5/19/2026
- Inclusions: Washer/Dryer, All Kitchen Applncs
Estimated market value
$5,342,300
$5.08M - $5.61M
$7,210/mo
Price history
| Date | Event | Price |
|---|---|---|
| 5/19/2026 | Listed for sale | $5,400,000+113%$628/sqft |
Source: | ||
| 1/12/2023 | Sold | $2,535,000-12.6%$295/sqft |
Source: | ||
| 12/5/2022 | Pending sale | $2,900,000$337/sqft |
Source: | ||
| 12/5/2022 | Contingent | $2,900,000$337/sqft |
Source: | ||
| 10/19/2022 | Price change | $2,900,000-8.8%$337/sqft |
Source: | ||
| 9/28/2022 | Listed for sale | $3,180,000-2.9%$370/sqft |
Source: | ||
| 9/19/2022 | Listing removed | -- |
Source: | ||
| 8/9/2022 | Price change | $3,275,000-90%$381/sqft |
Source: | ||
| 8/5/2022 | Price change | $32,750,000+893.3%$3,807/sqft |
Source: | ||
| 7/1/2022 | Price change | $3,297,000-5.8%$383/sqft |
Source: | ||
| 8/30/2021 | Listed for sale | $3,500,000+18.6%$407/sqft |
Source: Greenwich MLS, Inc. #114202 Report a problem | ||
| 4/7/2006 | Sold | $2,950,000$343/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax 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 | $411,600 |
Find assessor info on the county website
Monthly payment
Est. payment$--/mo
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Climate risks
Neighborhood: 06831
Nearby schools
GreatSchools rating
- 9/10Glenville SchoolGrades: K-5Distance: 1.7 mi
- 8/10Western Middle SchoolGrades: 6-8Distance: 0.9 mi
- 10/10Greenwich High SchoolGrades: 9-12Distance: 1.9 mi
Schools provided by the listing agent
- Elementary: Glenville
- Middle: Western
Source: Greenwich MLS, Inc.. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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