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7 Beds
10 Baths
10,000 sqft

$10,000,000

9 CASTAÑA ST, GUAYNABO PR, 00968

Price per sqft$1,000.00
Built in1997
Property size10,000 sqft
Property typeResidential
Courtesy of JOEL A KATZ, Joel Katz  Listing Contact: 787-587-4331

Overview

Active

Listed Mar 24, 2026

Updated Jun 1

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.

$66,530/mo

Est. mortgage payment based on a $10,000,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
PR9120156

Interior Features

Bedrooms
7
Bathrooms
10
Cooling
Yes
Basement
No

Exterior Features

Lot Size
1.2 Acres

Other Property Details

Association Fee Frequency
Monthly
Pets Allowed
Yes
Pool
Yes

Listings courtesy of Stellar MLS as distributed by MLS GRID

All information deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) nor Mariángel Martí shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Properties displayed may be listed or sold by various participants in the MLS. 

Based on information submitted to the MLS GRID as of 9:01 AM UTC on 9/15/2026. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

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