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.
For sale
$10,000,000
9 Castana St, Guaynabo, PR 00968
7beds
10,000sqft
Single Family Residence
Built in 1997
1.2 Acres Lot
$-- Zestimate®
$1,000/sqft
$650/mo HOA
What's special
Basketball courtSpa-inspired pool and jacuzziFully equipped private gymFully equipped outdoor kitchenOutdoor air-conditioning systemTranquil koi pondResort-style outdoor spaces
- 80 days |
- 697 |
- 19 |
Zillow last checked:
Listing updated:
Listed by:
Joel Katz 787-587-4331,
JOEL A KATZ 787-587-4331
Source: Stellar MLS,MLS#: PR9120156
Originating MLS: Puerto Rico

Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 7
- Bathrooms: 10
- Full bathrooms: 8
- 1/2 bathrooms: 2
Primary bedroom
- Features: Walk-In Closet(s)
- Level: Second
Kitchen
- Level: First
Living room
- Level: First
Heating
- None
Cooling
- Ductless
Appliances
- Included: Cooktop, Dishwasher, Dryer, Freezer, Ice Maker, Refrigerator, Washer
- Laundry: Laundry Room
Features
- High Ceilings, PrimaryBedroom Upstairs, Walk-In Closet(s)
- Flooring: Marble
- Doors: Outdoor Kitchen
- Has fireplace: No
Interior area
- Total structure area: 10,000
- Total interior livable area: 10,000 sqft
Property
Parking
- Total spaces: 4
- Parking features: Carport
- Carport spaces: 4
Features
- Levels: Two
- Stories: 2
- Exterior features: Basketball Court, Outdoor Kitchen, Tennis Court(s)
- Has private pool: Yes
- Pool features: Infinity
Lot
- Size: 1.2 Acres
Details
- Parcel number: 06209522504001
- Zoning: RESI
- Special conditions: None
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Concrete
- Foundation: Concrete Perimeter
- Roof: Concrete
Condition
- New construction: No
- Year built: 1997
Utilities & green energy
- Sewer: Public Sewer
- Water: Private
- Utilities for property: Electricity Connected, Water Connected
Community & HOA
Community
- Pet fee: $0 monthly
- Subdivision: SAN PATRICIO URBANIZATION
HOA
- Has HOA: Yes
- HOA fee: $650 monthly
- HOA name: San Patricio Urbanization
Location
- Region: Guaynabo
Financial & listing details
- Price per square foot: $1,000/sqft
- Date on market: 3/24/2026
- Cumulative days on market: 439 days
- Ownership: Fee Simple
- Total actual rent: 0
- Electric utility on property: Yes
- Road surface type: Asphalt
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 3/24/2026 | Listed for sale | $10,000,000$1,000/sqft |
Source: | ||
| 2/17/2026 | Listing removed | $10,000,000$1,000/sqft |
Source: | ||
| 2/23/2025 | Listed for sale | $10,000,000$1,000/sqft |
Source: | ||
Public tax history
Tax history is unavailable.
Monthly payment
Est. payment$--/mo
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Climate risks
Neighborhood: 00968
Getting around
54 / 100
Somewhat WalkableNearby schools
GreatSchools rating
No schools nearby
We couldn't find any schools near this home.
- Puerto Rico
- Guaynabo
- Guaynabo
- 00968
- 9 Castana St







