$650,000
4 Bed • 3 Bath • 2,975 Sq. Ft.4 bd · 3 ba · 2,975 sqft
39 Farrell Drive
Brewster, NY 10509
Listed with Coldwell Banker Realty
$699,900
Est. $4,423/moMahopac, NY 10541 · Putnam County
Know your budget before you tour. Get pre-qualified
An extraordinary opportunity to build your dream waterfront home on the shores of beautiful Lake Mahopac. Offering direct lake frontage with breathtaking water views, this rare property combines the excitement of new construction with the value of significant existing improvements already in place. The property features a usable existing foundation from the previous 2,500+ square foot home with an attached garage, along with municipal water and an existing septic system—providing an exceptional starting point for your custom lakefront residence. One of the property's most coveted features is the grandfathered boathouse and private dock, an increasingly rare amenity that offers immediate access to boating, fishing, kayaking, paddleboarding, and everything Lake Mahopac has to offer. Positioned on the desirable west side of the lake, the property enjoys beautiful sunrise views reflecting across the water and a front-row seat to the peaceful beauty of lakefront living. Whether you're relaxing by the shoreline, entertaining on the dock, or launching your boat for an afternoon on the water, this is a setting designed to be enjoyed year-round. At approximately 0.14 acres, this is a truly unique chance to create a custom waterfront retreat in one of the Hudson Valley's most sought-after lake communities. Waterfront building opportunities with an existing foundation, grandfathered boathouse, private dock, municipal water, septic, and spectacular lake views are exceptionally rare. Bring your architect, your builder, and your vision—and create the lakefront home you've always imagined.
As reported by the listing office; verify enrollment with the district.
Listed with Compass Greater NY, LLC · Ryan Arket · Source: OneKey MLS
Information provided by One Key MLS, and is deemed reliable but not guaranteed accurate. Data last updated: Nov 2, 2026, 8:07 PM ET. ©2026 One Key MLS.
Estimate your mortgage payment, including the principal and interest, taxes, insurance, HOA, and private mortgage insurance.
Estimated monthly payment
Representative rates
Representative rates only, indicative for comparison. Edit the interest rate for your own quote; your lender’s numbers vary with credit, points, and insurance.
Be the first to know when a Putnam County home hits the market.
Market insights
Current listings
New in the last 30 days
17
Nov 2026
Average price
Active listings
$758,536
Nov 2026
Average days on market
Active listings
107 days
Nov 2026
Computed from 102 active OneKey MLS listings in Mahopac, NY.
$650,000
4 Bed • 3 Bath • 2,975 Sq. Ft.4 bd · 3 ba · 2,975 sqft
39 Farrell Drive
Brewster, NY 10509
Listed with Coldwell Banker Realty
$599,888
3 Bed • 2.5 Bath • 2,224 Sq. Ft.3 bd · 2.5 ba · 2,224 sqft
25 Ponderosa Road
Carmel, NY 10512
Listed with Keller Williams Village Sq Rlt
$639,000
4 Bed • 2 Bath • 2,249 Sq. Ft.4 bd · 2 ba · 2,249 sqft
39 Gilbert Lane
Putnam Valley, NY 10579
Listed with Coldwell Banker Realty