Single Family
517A Old Chappaqua Road
Active · Mount Pleasant · Westchester County, NY 10510
- Bedrooms
- 5 Beds
- Bathrooms
- 5 Baths
- Year built
- 2026
- Est. monthly taxes
- $5,660.33
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About this home
Exquisite new 5 bedroom, 4.1 bath center hall colonial to be built offering refined luxury and timeless architectural elegance in an exceptional cul-de-sac setting. Perfectly positioned on just shy of one acre and backing the serene wooded grounds of the Edith Macy Center, this residence blends privacy, prestige, and natural beauty. A rare opportunity exists to fully customize finishes, materials, colors, and upgrades — allowing you to curate a home that reflects your personal vision and lifestyle. Upon entry, a dramatic double-sided staircase with an architectural catwalk creates a breathtaking focal point. Thoughtfully designed with 9-foot ceilings throughout and a soaring 20-foot cathedral ceiling in the family room, the home offers grand scale and open, light-filled living spaces. A statement fireplace anchors the family room, creating warmth and sophistication. The state-of-the-art chef’s kitchen will feature premium appliances, custom cabinetry, quartz countertops, and expansive workspace ideal for entertaining and everyday luxury living. Upstairs, generously proportioned bedrooms provide comfort and privacy, with the option to finish a bonus room tailored to your needs — whether a media lounge, private office, or fitness studio. The primary suite will serve as a tranquil retreat with spa-inspired bath potential. Additional exceptional features include: 3-car garage, expansive rear patio for seamless indoor/outdoor entertaining, large unfinished lower level, plumbed for future bath and endless possibilities, pool site potential in the rear yard. The home will be strategically set back and elevated on the property to maximize privacy, presence, and curb appeal. Driveway will be completely redone and re-pitched. House is currently staked out in yellow. Taxes are projected based on list price and consolidated tax rate and do not include STAR discount. A rare opportunity to build a luxury residence in a coveted location. Customize now and bring your dream home to life.
Listing snapshot
- Days on site
- 28 days
- Listed on MLS
- Sep 30, 2026
- Full baths
- 4
- Half baths
- 1
- Annual property tax (MLS)
- $67,924
- Tax year
- 2026
- Area source (MLS)
- Other
- Listing brokerage
- Mark Seiden Real Estate Team
- MLS ID
- KEY1057129
- Last updated
- Oct 1, 2026
General features
- Property type
- Single Family
- Property subtype
- Single Family Residence
- Year built
- 2026
- Garage
- Yes
- Garage spaces
- 3
- Parking
- Attached
- Water source
- Well
- Sewer
- Public Sewer
- Utilities
- Electricity Connected, Sewer Connected, Trash Collection Public
Interior features
- Basement
- Unfinished
- Heating
- Electric
- Cooling
- Central Air
- Interior
- Breakfast Bar, Cathedral Ceiling(s), Chefs Kitchen, Crown Molding, Eat-in Kitchen, High Ceilings, His and Hers Closets, Kitchen Island, Pantry, Primary Bathroom, Quartz/Quartzite Counters, Recessed Lighting, Soaking Tub, Walk-In Closet(s)
- Appliances
- Dryer, Stainless Steel Appliance(s), Washer
- Flooring
- Hardwood
- Fireplace
- Yes
- Fireplaces
- 1
Exterior features
- Architectural style
- Colonial
- Construction materials
- HardiPlank Type
- Private pool
- No
Schools (MLS)
- Elementary school
- Todd Elementary School
- Elementary school district
- Briarcliff Manor
- Middle school
- Briarcliff Middle School
- Middle school district
- Briarcliff Manor
- High school
- Briarcliff High School
- High school district
- Briarcliff Manor
School information is provided by the MLS. Confirm attendance eligibility with the school district.
Recent activity
- Listing updated from MLS
- First seen on this site
- MLS status changed
Location
Estimate monthly payment
Estimated monthly principal & interest—
Monthly property taxNot provided
Monthly association / maintenance feesNot provided
Estimated monthly total of entered costs—
Listing data is supplied by the MLS and may change without notice.
