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$10,000,000
5 Days On Site

9 CASTAÑA STREET
GUAYNABO, 00968

For Sale|Single Family Residence|Active
7
Beds
10
Total Baths
8
Full Baths
2
Partial Baths
10,000
SqFt
$1,000
/SqFt
1997
Built
Subdivision:
SAN PATRICIO URBANIZATION
County:
Guaynabo

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9 CASTAÑA STREET9 CASTAÑA STREET9 CASTAÑA STREET9 CASTAÑA STREET
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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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Listing Snapshot
Price 
$10,000,000
Days On Site 
5 Days
Bedrooms 
7
Inside Area (SqFt) 
10,000 sqft
Total Baths 
10
Full Baths 
8
Partial Baths 
2
Lot Size 
1.2 Acres
Year Built 
1997
MLS® Number 
PR9120156
Status 
Active
Property Tax 
N/A
HOA/Condo/Coop Fees 
$650 monthly
Sq Ft Source 
Owner
Friends & Family
Recent Activity
5 days agoListing updated with changes from the MLS®
6 days agoListing first seen on site
General Features
Acres 
1.2
Carport 
4
Direction Faces 
West
Foundation 
Concrete Perimeter
Levels 
Two
Pets 
Yes
Property Sub Type 
Single Family Residence
Sewer 
Public Sewer
SqFt Total 
10000
Utilities 
Electricity ConnectedWater Connected
Water Source 
Private
Zoning 
RESI
Interior Features
Appliances 
CooktopDishwasherDryerFreezerIce MakerRefrigeratorWasher
Flooring 
Marble
Furnished 
Partially
Interior 
High CeilingsWalk-In Closet(s)
Laundry Features 
Laundry Room
Kitchen 
Level - First
Living Room 
Level - First
Master Bedroom 
Level - Second
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Exterior Features
Construction Details 
Concrete
Exterior 
Basketball CourtOutdoor KitchenTennis Court(s)
Pool Features 
InfinityPrivate
Private Pool 
Yes
Roof 
Concrete
Community Features
Association Dues 
650
HOA Fee Frequency 
Monthly
MLS Area 
00968 - Guaynabo
Roads 
Asphalt
Listing courtesy of JOEL A KATZ (787) 587-4331



Listing information is provided by Participants of the Stellar MLS. IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed. Properties displayed may be listed or sold by various participants in the MLS Copyright 2026, Stellar MLS.
Last checked: 2026-03-30 06:12 PM EDT

Neighborhood & Commute
Source: Walkscore
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