401 Sandy Valley Rd, Westwood, MA, 02090
About This Home
Set at the end of a long winding drive, this remarkable 16+ acre estate abuts more than 100 acres of conservation land, creating a rare sense of privacy and natural beauty. Suited for formal entertaining, intimate gatherings, and gracious family living, it includes a welcoming main entrance hall, a wonderful living room with an attached library, a spacious formal dining room with adjoining butler’s pantry, and a stunning chef’s kitchen that overlooks a fireplaced family room and a covered patio. There are 7 bedrooms highlighted by a stunning primary suite, as well as two offices, a playroom, an exercise room, and an attached, heated three-car garage. Outdoor amenities include a heated pool with a well-appointed pool house, a sport court, a stream-fed pond, and a barn-garage with a greenhouse and two horse stalls, along with a charming two-bedroom cottage. This exceptional property offers access to excellent public and private schools, Legacy Place, the train, and Boston via Rte. 95/128
Getting Around
Car-Dependent
Very Limited Transit
Somewhat BikeableSchools
Construction
Condition
- Year built: 1936
Materials
- Foundation: Concrete Perimeter
- Roof: Slate
- Construction materials: Frame,Brick
Type & Style
- Home type: SingleFamily
- Architectural style: Colonial
- Property subType: Single Family Residence
Interior
Appliances
- Appliances included: Water Heater
Basement
- Has basement: Yes
- Basement: Full,Partially Finished,Bulkhead
Bedrooms & Bathrooms
- Bedrooms: 7
- Bathrooms: 8
- Full bathrooms: 5
- 1/2 bathrooms: 3
Features
- High Speed Internet
- Window features: Insulated Windows
- Flooring: Tile,Hardwood,Stone / Slate
- Number of fireplaces: 7
- Fireplace: Yes
- Finished area below ground: 750
- Finished area above ground: 12,012
Heating & Cooling
- Heating features: Central,Propane,Hydro Air,Active Solar
- Cooling features: Central Air,Active Solar
Interior Area
- Total structure area: 12,762
- Total interior livable area: 12,762 sqft
Master Bathroom
- Features: Yes
Property
Details
- Parcel number: M:015 L:014 & L:027,300173
- Zoning: RE
- Horse amenities: Paddocks
Features
- Private pool: Yes
- Pool features: Pool - Inground Heated
- Patio & porch: Porch,Deck,Patio
- Exterior features: Porch,Deck,Patio,Balcony,Pool - Inground Heated,Cabana,Rain Gutters,Barn/Stable,Paddock,Greenhouse,Professional Landscaping,Sprinkler System,Decorative Lighting,Fruit Trees,Garden,Horses Permitted
- Has view: Yes
- View description: Scenic View(s)
- Frontage length: 182.00
- Horses can be raised: Yes
Lot
- Lot size: 16.78 Acres
Parking
- Total spaces: 26
- Parking features: Attached,Detached,Garage Door Opener,Heated Garage,Garage Faces Side,Off Street,Paved
- Has garage: Yes
- Attached garage spaces: 6
- Covered spaces: 6
- Has uncovered spaces: Yes
- Uncovered spaces: 20
Climate Risk is Financial Risk
Every home has a financial story beyond the listing price. Below, you’ll see the climate risks that could affect this property — and in Bills & Affordability, how those risks may influence repairs, insurance, utilities, and long-term value.
Biggest Threats for This Home
- Hurricane
- Inland Flooding
- Ice Storm
- Tsunami
How This Home’s Risks Compare
FEMA Declared Disasters Across Massachusetts Counties
Understanding the Costs
Financial advisors generally recommend spending no more than 30% of your gross household income on housing costs. In practice, many households stretch to 35% or beyond — especially in high-cost markets.
Estimated Costs Today
| Monthly | Annual | |
|---|---|---|
| Mortgage | $44,497 | $533,964 |
| Home Insurance * | $2,068 | $24,816 |
| Property Taxes | $9,486 | $113,832 |
| Electricity | $2,516 | $30,198 |
| Total | $58,567 | $702,804 |
Income You'd Need if You Spent...
Massachusetts FAIR Plan Programs
How Costs Could Change Over Time
Climate risk is quickly impacting all of the major home ownership costs. Adjust the growth rates and percentage of income spent on housing below to see how your housing costs could change over the next 10 years — and what income you'd need to keep up.
Comparing Against the Market
Price Per Sq Ft
vs Other Active Listings
Avg $/sqft
vs Homes Sold Last Month
Median $/sqft
Current Market Trends
Median Price Per Square Foot
The median price per square foot of homes sold in this area each month. Compare this to this listing's price per square foot to gauge whether the home is priced in line with recent sales.
Historicals for This Listing
Zestimate History ($/sqft)
Price History
| Date | Event | Price |
|---|---|---|
| 2026-05-07 | Price change | $8,800,000 |
| 2026-03-13 | Price change | $9,000,000 |
| 2026-02-13 | Price change | $9,300,000 |
| 2025-11-21 | Listed for sale | $9,690,000 |
| 2025-11-18 | Listing removed | $10,900,000 |
| 2025-03-20 | Price change | $10,900,000 |
| 2025-01-29 | Listed for sale | $11,900,000 |
| 2024-11-27 | Listing removed | $12,950,000 |
| 2024-06-10 | Listed for sale | $12,950,000 |
| 2024-06-03 | Listing removed | $13,500,000 |
| 2024-02-09 | Listed for sale | $13,500,000 |
| 2023-11-11 | Listing removed | $13,500,000 |
| 2023-09-09 | Listed for sale | $13,500,000 |
| 2017-12-18 | Sold | $600,000 |
| 2016-07-06 | Sold | $3,925,000 |
| 2008-07-30 | Sold | $2,900,000 |
| 2003-07-16 | Sold | $2,526,624 |
| 2003-03-19 | Sold | $1,500,000 |
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