Active9 CASTAÑA STREET
GUAYNABO, PR 00968
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.
Facts & features
Interior
- Bedrooms
- 7
- Bathrooms
- 10
- Living area
- 10,000 sqft
- Heating
- None
- Cooling
- Mini-Split Unit(s)
- Flooring
- Marble
- Features
- High Ceilings, PrimaryBedroom Upstairs, Walk-In Closet(s)
- Appliances
- Cooktop, Dishwasher, Dryer, Freezer, Ice Maker, Refrigerator…
Exterior & lot
- Lot size
- 52,272 sqft (1.2 ac)
- Pool
- Yes
- Roof
- Concrete
- Construction
- Concrete
- Exterior
- Basketball Court, Outdoor Kitchen, Tennis Court(s)
Parking
- Carport
- 4 spaces
Financial
- HOA dues
- $650 / monthly
- Price / sqft
- $1000/sqft
Utilities
- Water
- Private
- Sewer
- Public Sewer
- Utilities
- Electricity Connected, Water Connected
Property
- Property type
- Single Family
- Year built
- 1997
- Subdivision
- SAN PATRICIO URBANIZATION
- County
- Guaynabo
Listing
- Status
- Active
- Days on market
- 1 day
- MLS #
- MFR785594179
- Source
- Stellar MLS
Listed by Joel Katz · JOEL A KATZ
Listing data provided by Stellar MLS. Information deemed reliable but not guaranteed.
Estimate your monthly cost
PITI + HOA- Principal & interest
- $50,565/mo
- Property tax
- Being confirmed
- Home insurance
- $200/mo
- HOA dues
- $650/mo
Opens at 20% down over 30 years at 6.5%, the same assumptions as the answers below. The record carries no tax bill for this listing yet, so that figure is being confirmed and stays out of the total rather than being filled in from a percentage of the price. Enter a rate above to count it. Insurance is left out until you enter a quote, because Florida premiums turn on roof age, elevation and carrier. Every field is editable.
Ask about this property
Answered from this listing’s own figures and the sales around it.
Price history
From the property’s MLS record.
| Date | Event | Price | Change |
|---|---|---|---|
| Mar 24, 2026 | Listed | $10,000,000 | — |
Neighbourhood
The schools below come from the MLS record for this home. Walking, transit and cycling figures for GUAYNABO, PR are not connected yet, so this page does not show them.
Location
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