About 20 Castle Ct
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 Thermador 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 Ct
| MLS® # | ML82059857 |
|---|---|
| Price | $12,000,000 |
| Bedrooms | 7 |
| Bathrooms | 7.00 |
| Full Baths | 6 |
| Half Baths | 1 |
| Square Footage | 5,722 |
| Square Footage | Other |
| Acres | 0.50 |
| Year Built | 2026 |
| Type | Single Family Residential |
| Sub-Type | Single Family Home |
| Style | Contemporary, Modern / High Tech |
| Status | Active |
Community Information
| Address | 20 Castle Ct |
|---|---|
| Area | Carolands Etc. |
| City | Hillsborough |
| County | San Mateo |
| State | CA |
| Zip Code | 94010 |
Amenities
| Amenities | High Ceiling , Vaulted Ceiling , Walk-in Closet |
|---|---|
| Utilities | Natural Gas, Public Utilities, Solar Panels - Owned |
| Garages | Attached Garage, Gate / Door Opener |
| View | Hills, Neighborhood, Water |
| Is Waterfront | No |
| Has Pool | Yes |
Interior
| Appliances | Countertop - Other, Dishwasher, Freezer, Garbage Disposal, Hood Over Range, Island, Pantry, Refrigerator, Wine Refrigerator |
|---|---|
| Heating | Heat Pump |
| Cooling | Central AC |
| Fireplace | No |
| # of Stories | 2 |
Exterior
| Windows | Solar Power |
|---|---|
| Roof | Metal |
| Construction | Concrete , Steel, Wood Frame |
| Foundation | Concrete Perimeter and Slab, Crawl Space |
Additional Information
| Zoning | R10025 |
|---|---|
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Agent | Phil Chen |
|---|---|
| Office | Christie's International Real Estate Sereno |
| Contact Info | 415-271-1920 |