$10,000,000
9 CastañA Street
Guaynabo, PR 00968
Property type
Year built
Lot size
Price / sq ft
HOA dues
Day on market
Flood zone
About this home
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.
Estimated monthly payment
Estimate only. Taxes use the listing's reported amount where available; insurance is a Florida-average estimate. Your actual payment will vary — run a full calculation or talk to a lender.
Price & listing history1 days on market
- Status: ActiveMar 24, 2026
- Listed$10,000,000Mar 24, 2026
- Price increased$10,000,000
Facts & features
- Property type
- Residential
- Sub type
- Single Family Residence
- Status
- Active
- Days on market
- 1
- Cumulative DOM
- 359
- Subdivision
- San Patricio Urbanization
- County
- Guaynabo
- Year built
- 1997
- Living area
- 10,000 sq ft
- Price/sq ft
- $1,000
- Lot size
- 52,272 sq ft
- Lot category
- 1 to less than 2
- Flood zone
- n/a
- Pool
- Private pool
- Parcel #
- 062-095-225-04-001
- Zoning
- RESI
- MLS #
- PR9120156
Interior Details
- Bedrooms
- 7
- Full bathrooms
- 8
- Half bathrooms
- 2
- Flooring
- Marble
- Appliances
- Cooktop, Dishwasher, Dryer, Freezer, Ice Maker, Refrigerator, Washer
- Interior features
- High Ceilings, PrimaryBedroom Upstairs, Walk-In Closet(s)
- Laundry
- Laundry Room
- Stories / Levels
- Two
- Direction faces
- West
Heating & Cooling
- Heating
- None
- Cooling
- Mini-Split Unit(s)
Parking
- Carport
- Yes
HOA & Financial
- HOA fee
- $650 / Monthly
- Monthly HOA
- $650/mo
- Total monthly fees
- $650/mo
- Total annual fees
- $7,800
- HOA name
- San Patricio Urbanization
- Min lease term
- 6 Months
- Ownership
- Fee Simple
- Available for lease
- Yes
- Lease restrictions
- Yes
- Additional lease restrictions
- n/a
Exterior & Construction
- Exterior features
- Basketball Court, Outdoor Kitchen, Tennis Court(s)
- Construction materials
- Concrete
- Roof
- Concrete
- Foundation
- Concrete Perimeter
- Pool
- Private pool
- Road surface
- Asphalt
Utilities
- Sewer
- Public Sewer
- Water source
- Private
- Utilities
- Electricity Connected, Water Connected
Community
- Pets allowed
- Yes
Room Details
| Room | Level | Dimensions |
|---|---|---|
| Primary Bedroom | Second | |
| Living Room | First | |
| Kitchen | First |
Listing Details
- Listing date
- 2026-03-24
- On market date
- 2026-03-24
- Original list price
- $10,000,000
- Occupant type
- Vacant
- MLS area
- 00968 - Guaynabo
- Listing AOR
- Puerto Rico
- Status changed
- 2026-03-24
Flood risk
See FEMA for this zone’s designation and insurance requirements.
Source: FEMA flood zone reported on the listing. Confirm current designation at FEMA Flood Map Service Center.
Location
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
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Listings courtesy of Stellar MLS as distributed by MLS GRID
IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Based on information submitted to the MLS GRID as of March 25, 2026 at 6:53 AM ET. 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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