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
Est.:
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
- 6 days |
- 464 |
- 22 |
Zillow last checked: 7 hours ago
Listing updated: March 25, 2026 at 03:55am
Listing Provided 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: 365 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
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
Public tax history
Tax history is unavailable.BuyAbility℠ payment
Est. payment
$52,219/mo
Principal & interest
$51569
HOA Fees
$650
More affordability tools
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






