9 CASTAÑA STREET
Guaynabo, PR, 00968 $ 10,000,000
Bedrooms7 Baths8.2 Sq 10,000 Monthly Estimate*
$ 61,572
for $10,000,000 with 7 bedrooms and 8 full baths, 2 half baths. This 10,000 square foot home was built in 1997 on a lot size of 1.2.
Nestled on 1.2 acres, 9 Castaña St. represents a rare opportunity to own a multigenerational estate within San Juan’s premier gated community, San Patricio. Designed by award-winning architect Carlos Betancourt, the residence masterfully balances grand-scale entertaining with a layout that remains intimate and connected, ensuring comfort for every member of the family. The resort-style outdoor spaces create a private sanctuary in the heart of the city, featuring a fully equipped outdoor kitchen, spa-inspired pool and jacuzzi, basketball court, outdoor air-conditioning system, tranquil koi pond, and a chicken coop. Inside, the home showcases soaring ceilings and expansive living areas, including multiple formal and informal gathering spaces, a game and media room with direct access to the outdoor entertaining areas, and a fully equipped private gym. Offering over 10,000 square feet of refined living space, the residence includes 7 bedrooms, 8 full bathrooms, and 2 powder rooms. On the main level, doors open throughout, creating a seamless indoor-outdoor flow, connecting the interior living spaces to the beautifully designed outdoor areas. Additional features include a double backup generator with automatic transfer switches and a 6,000-gallon cistern with a water treatment system, ensuring comfort and reliability year-round. The property has a covered carport for 4 vehicles, along with additional driveway parking. Centrally located, this home is approximately 10 minutes from the Condado area and 25 minutes from Dorado.
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FeaturesGeneralSewer Public Sewer
Heating None
Cooling Mini-Split Unit(s)
Utilities Electricity Connected Water Connected
Roof Concrete
Appliances Cooktop Dishwasher Dryer Freezer Ice Maker Refrigerator Washer
Zoning RESI
HOA Fee 650
Pool Features Infinity
Construction Materials Concrete
Pets Allowed Yes
Year Built 1997
Levels Two
Property Subtype Single Family Residence
Ownership Fee Simple
Assoc Fee Paid Per Monthly
County Guaynabo
New Construction false
Property Type Residential
Subdivision Name SAN PATRICIO URBANIZATION
Facing Direction West
Garage Y/N false
Total Rooms 3
Full Baths 8
Status Active
Directions head west on Avenida de Diego and follow signs toward PR-22 / Expreso José de Diego. Merge onto PR-22 heading west toward Guaynabo. Continue on PR-22 for a few minutes then take the exit toward PR-20 / Expreso Rafael Martínez Nadal. Merge onto PR-20 southbound and continue until you reach the exit for San Patricio. After exiting follow the local roads into the San Patricio community then proceed to 9 Castaña Street
City GUAYNABO
Association Name San Patricio Urbanization
MLS Area 00968 - Guaynabo
Lot Size Units Acres
Lot Size Square Feet 52272
Carport Spaces 4
Carport Y/N true
Land Lease Y/N false
Additional Parcels Y/N false
Lease Considered Y/N true
Building Area Units Square Feet
Living Area Units Square Feet
Standard Status Active
Occupancy Type Vacant
Minimum Lease 6 Months
Water Access Y/N false
Monthly HOA Amount 650
Water View Y/N false
Flood Zone Code n/a
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InteriorInterior Amenities High Ceilings PrimaryBedroom Upstairs Walk-In Closet(s)
Flooring Marble
Furnished Y/N Partially
Air Conditioning Y/N true
Heating Y/N false
Fireplace Y/N false
Half Baths 2
Laundry Features Laundry Room
Total Bedrooms 7
Total Baths 10
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ExteriorExterior Amenities Basketball Court Outdoor Kitchen Tennis Court(s)
Water Source Private
Lot Size Area 1.2
Foundation Details Concrete Perimeter
Building Area Total 10000
Lot Size Acres 1.2
Road Surface Type Asphalt
Private Pool true
Waterfront Y/N false
Covered Spaces 4
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* Excluded FeaturesList Byjoelkatz24@gmail.comEmail
Affordability Calculator
- Monthly Principal & Interest
- $61,572
- Monthly Property Taxes
- --
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
Learn more about how to save NearbySingle family listings in Guaynabo, PR
Average List Price $1,817,115
Percent of Sale Price 82%
Trends Information provided by ATTOM Data Solutions.
4827338 Elementary School
4827337 Middle School
Unknown High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 3/24/2026 | $10,000,000 | | Listed Price |