
401 Sandy Valley Rd Westwood — Photo 1 of 26
Recent Drop: $890,000
$8,800,000
Westwood, MA 02090
Beds
7
Baths
6.5
SqFt
12,762
Style
Single Family
Built
1936
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
* Analysis is based on 18 actively listed and recently sold comparable properties strictly within Westwood, MA.
Water Heater
Aug 15, 2026
MLS® 73564111
Was $9,000,000
May 7, 2026
MLS® 73457104
Was $9,300,000
Mar 13, 2026
MLS® 73457104
Was $9,690,000
Feb 13, 2026
MLS® 73457104
Nov 21, 2025
MLS® 73457104
Nov 18, 2025
MLS® 73330261
Mar 19, 2025
MLS® 73250023
Jan 29, 2025
MLS® 73330261
Jun 10, 2024
MLS® 73250023
16,318
U.S. Census Bureau, ACS 2024 5-Year Estimates (B01003)
$223K
U.S. Census Bureau, ACS 2024 5-Year Estimates (B19013)
12.7%
U.S. Census Bureau, ACS 2024 5-Year Estimates (B25003)
1,189 housing units permitted in the last 12 months (+21% vs the prior 12 months) — 706 in 5+ unit buildings
U.S. Census Bureau, Building Permits Survey (through Jun '26)
Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 12,762 sq ft principal dwelling). Lot size: 730,936 sq ft.
Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.
Listing Agent: John Boyle
Listing Office: LandVest, Inc.
MLS® Number: 73457104
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