Casa Blanca Farm - An Iconic Cape Cod Estate. Beyond the stately columned entrance and winding cobblestone drive, this extraordinary estate unfolds across nearly five breathtaking acres. Masterfully renovated and meticulously redesigned, the residence blends timeless architecture with exceptional craftsmanship and sophisticated design. Sun-filled interiors showcase custom millwork, designer lighting, exquisite finishes and beautifully proportioned spaces, anchored by a spectacular chef's kitchen designed for effortless entertaining. Outside, a private resort awaits with a gunite pool, built-in spa, elegant white limestone terraces, expansive patios and sweeping manicured grounds. The completely rebuilt lower level is an entertainer's dream, featuring a second full kitchen, custom bar, expansive great room, private cigar lounge, game room and state-of-the-art theater. Minutes from Osterville Village, golf, boating and beaches, Casa Blanca Farm is a remarkable private estate where luxury, privacy and Cape Cod living come together beautifully.
For sale
$3,950,000
9 Hi River Rd, Marstons Mills, MA 02648
4beds
7,080sqft
Single Family Residence
Built in 2000
4.96 Acres Lot
$3,724,900 Zestimate®
$558/sqft
$-- HOA
What's special
Exquisite finishesSun-filled interiorsGunite poolSweeping manicured groundsPrivate resortStately columned entranceCompletely rebuilt lower level
- 11 days
- 489
- 49
Zillow last checked:
Listing updated:
Listed by:
Livia Freitas Monteforte 508-274-6185,
Compass 508-206-8726
Source: MLS PIN,MLS#: 73575553
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 3
- 1/2 bathrooms: 2
Primary bathroom
- Features: Yes
Heating
- Central, Forced Air, Natural Gas
Cooling
- Central Air
Appliances
- Included: Gas Water Heater
Features
- Basement: Full,Walk-Out Access,Interior Entry
- Number of fireplaces: 2
Interior area
- Total structure area: 7,080
- Total interior livable area: 7,080 sqft
- Finished area above ground: 4,600
- Finished area below ground: 2,480
Property
Parking
- Total spaces: 8
- Parking features: Attached, Garage Door Opener, Garage Faces Side, Off Street, Driveway, Stone/Gravel
- Attached garage spaces: 2
- Uncovered spaces: 6
Features
- Has view: Yes
- View description: Scenic View(s)
- Waterfront features: Lake/Pond, Ocean, Beach Ownership(Public)
Lot
- Size: 4.96 Acres
- Features: Additional Land Avail., Cleared, Gentle Sloping, Level
Details
- Parcel number: 2227447
- Zoning: RF
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Cape
- Property subtype: Single Family Residence
Materials
- Foundation: Concrete Perimeter
Condition
- Year built: 2000
Utilities & green energy
- Sewer: Inspection Required for Sale
- Water: Private
Community & HOA
Community
- Features: Shopping, Walk/Jog Trails, Golf, Conservation Area, Marina, Private School, Public School
HOA
- Has HOA: No
Location
- Region: Marstons Mills
Financial & listing details
- Price per square foot: $558/sqft
- Tax assessed value: $1,799,200
- Annual tax amount: $14,671
- Date on market: 9/10/2026
- Road surface type: Paved
Estimated market value
$3,724,900
$3.54M - $3.91M
$5,786/mo
Price history
| Date | Event | Price |
|---|---|---|
| 9/10/2026 | Listed for sale | $3,950,000+419.7%$558/sqft |
Source: MLS PIN #73575553 Report a problem | ||
| 12/4/2019 | Sold | $760,000-7.9%$107/sqft |
Source:  CCIMLS #21904036 Report a problem | ||
| 9/19/2019 | Pending sale | $825,000$117/sqft |
Source: Jack Conway & Co Inc #21904036 Report a problem | ||
| 8/14/2019 | Price change | $825,000-5.7%$117/sqft |
Source: Jack Conway & Co Inc #21904036 Report a problem | ||
| 6/1/2019 | Price change | $875,000-7.8%$124/sqft |
Source: Jack Conway Cape Cod - Sandwich #72510602 Report a problem | ||
| 1/30/2019 | Listed for sale | $949,000+1086.3%$134/sqft |
Source: Robert Paul Properties, Inc. #21900544 Report a problem | ||
| 10/13/1994 | Sold | $80,000$11/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $13,743 +13.5% | $1,698,800 +9.6% |
| 2024 | $12,107 +3.8% | $1,550,200 +10.9% |
| 2023 | $11,660 +1.2% | $1,398,100 +17% |
| 2022 | $11,519 +19.3% | $1,194,900 +29.8% |
| 2021 | $9,656 -1.7% | $920,500 +2.7% |
| 2020 | $9,826 +7.5% | $896,500 +10.7% |
| 2019 | $9,137 +11.8% | $810,000 +11.2% |
| 2018 | $8,170 +8.6% | $728,200 +4.2% |
| 2017 | $7,521 -1.3% | $699,000 |
| 2016 | $7,619 +4.7% | $699,000 +4.3% |
| 2015 | $7,275 +2% | $670,500 0% |
| 2014 | $7,130 +3.8% | $670,700 0% |
| 2013 | $6,870 +1.1% | $670,900 -2.7% |
| 2012 | $6,792 -0.7% | $689,500 -5.5% |
| 2011 | $6,843 -7.9% | $729,500 +0.1% |
| 2010 | $7,434 +0.2% | $728,800 -9% |
| 2009 | $7,422 +2.1% | $800,600 -5% |
| 2008 | $7,266 +18.7% | $842,900 -13% |
| 2007 | $6,122 -7.6% | $968,600 +63.9% |
| 2004 | $6,629 | $590,800 |
| 2003 | $6,629 | $590,800 |
Find assessor info on the county website
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Neighborhood: Marstons Mills
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