About 20 Castle Court
Offered as a rare presale opportunity with the ability to personalize select finishes, this modern architectural masterpiece is estimated for completion in Q3 2027. Privately situated on a level half-acre cul-de-sac lot, the residence offers approximately 5,722 square feet of refined living space, including an attached JADU and detached ADU . A dramatic double-height foyer with a full-height porcelain slab feature wall and statement chandelier creates a striking first impression. Soaring ceilings, premium engineered oak flooring, a dramatic floating staircase, and walls of glass create a striking sense of scale and effortless indoor-outdoor living. The showpiece kitchen features custom European-inspired cabinetry with warm natural wood finishes, natural quartzite surfaces, a waterfall island, and premium Miele appliances. A private balcony, spa-inspired primary bath, custom wine display, Control4 automation, and beautifully landscaped grounds complete the residence. Buy early for preferred pricing and design personalization.
Features of 20 Castle Court
| MLS® # | ML82059857 |
|---|---|
| Price | $12,000,000 |
| Bedrooms | 7 |
| Bathrooms | 7.00 |
| Full Baths | 6 |
| Half Baths | 1 |
| Square Footage | 5,722 |
| Acres | 0.50 |
| Year Built | 2026 |
| Type | Residential |
| Sub-Type | Single Family Residence |
| Style | Contemporary |
| Status | Active |
Community Information
| Address | 20 Castle Court |
|---|---|
| City | Hillsborough |
| County | San Mateo |
| State | CA |
| Zip Code | 94010 |
Amenities
| Parking | Attached |
|---|---|
| # of Garages | 3 |
| View | Hills, Water |
| Is Waterfront | No |
| Has Pool | No |
Interior
| Interior Features | Family Room, Formal Dining Room, Pantry |
|---|---|
| Appliances | Dishwasher |
| Heating | Heat Pump |
| Cooling | Central Air |
| Fireplace | No |
| Fireplaces | Other |
| # of Stories | 2 |
| Stories | Two Story |
School Information
| District | San Mateo Union High |
|---|
Additional Information
| Date Listed | September 2nd, 2026 |
|---|---|
| Zoning | R100 |
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Agent | Phil Chen |
|---|---|
| Office | Christie's International Real Estate Sereno |