RARE OPPORTUNITY BORDERING ALAMO! This custom 6 BR/ 3.5 BA home has it all! Perched at the end of a cul-de-sac sits 1815 Castle Gate Rd on just over 1 acre offering Mt. Diablo views, privacy and nearly 3,700 sq. ft +/- of functional living space. Main level greets you with grand vaulted ceilings, formal living and dining, primary bedroom suite, laundry room and entertainer's kitchen. The open kitchen, dining and family room concept makes it the perfect space to host and entertain. Walk out onto the expansive deck off the kitchen and family room. All downstairs rooms have private access to the backyard. 5th room was used as a study and the 6th room was used as a multi-purpose room, both could be used as possible bedrooms. With over 1 acre of land, the possibilities are endless. .. Think pool site, ADU or vineyard? Additional highlights: Newer roof (2018), owned solar, central whole house vacuum, newer dual zone HVAC (2019), 3 car garage, 70 gallon water heater. Top rated Acalanes Union High School district, conveniently located to downtown Walnut Creek, shopping, dining, Kaiser, BART, freeway, and Iron Horse Trail.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Permits
Beds
4
Baths
4
Stories
1
Lot width
—
Lot depth
—
Lot size
1.08 Acres
Year renovated
1999
Sq. Ft.
3,684
Year built
1998
Style
Single Family Residential
County
Contra Costa County
APN
1845000114
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Oct 30, 2026.
PD
Planned Development District
The purpose of the Planned Development District is to allow diversification in the relationship of various buildings, land uses, structures, and open spaces in order to be relieved from the rigid standards of conventional zoning. A Planned Development District shall comply with the regulations and provision of the General Plan and any applicable specific plan and shall provide adequate standards to promote the public, health, safety and general welfare without unduly inhibiting the advantages of modern building techniques and planning for residential or commercial purposes.
Nov 24, 2025 • Active
Building new construction, additions, alterations or sign
Remove and replace windows and a sliding door.
Remodel
Sep 12, 2019 • Final
Mechanical, electrical, or plumbing only
Remove and replace the air conditioning unit, furnace, and coil.
HVAC
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Parking
Garage Information
Has Garage
# of Garage Spaces: 3
Has Attached Garage
Parking Information
Parking Features: Attached, Garage Door Opener
# of Covered Spaces: 3
Interior
Virtual Tour Information
Bedrooms Information
# of Bedrooms: 6
Bathroom Information
Count of Bathrooms: 4
# of Full Bathrooms: 3
# of Half Bathrooms: 1
Interior Features
Interior Features: Central Vacuum, In-Law Floorplan
Laundry Features: Hookups Only
Has Heating
Heating: Zoned
Has Cooling
Cooling: Central Air, Zoned
Flooring: Carpet, Tile, Vinyl, Wood
Has Fireplace(s)
# of Fireplaces Total: 2
Fireplace Features: Family Room, Gas, Living Room
Appliances: Dishwasher, Disposal, Double Oven, Electric Cooktop
Rooms Information
Basement: Full
Exterior
Exterior Features
Entry Level: 0
Window Features: Dual Pane
Building Information
Living Area: 3684
Living Area Units: Square Feet
Living Area Source: Appraiser
Building Area Total: 3684
Building Area Units: Square Feet
Building Area Source: Appraiser
Construction Materials: Brick, Stone, Wood Siding, Other
Architectural Style: Craftsman
Year Built: 1998
Foundation Details: Other
Mobile Home Information
Mobile Dim Units: Feet
Pool Information
Has Spa
Spa Features: Jetted Tub
Property Type
Property Type: Residential
Property SubType: Single Family Residence
Property Information
Property Condition: Original
Other Equipment: Intercom
Lot Information
Lot Features: Court, Cul-De-Sac, Garden, Manual Sprinkler Front, Secluded, Other
Lot Size Sq. Ft.: 47045
Lot Size Acres: 1.08
Lot Size Area: 1.08
Lot Size Units: SqFt
Lot Size Units: Acres
Elevation: 0
Elevation Units: Feet
Green Information
Green Energy Generation: Solar
Utilities
Utility Information
Electric: Photovoltaics Seller Owned
Sewer: Public Sewer
Water Source: Public
Location
HOA Information
Association Fee: 0
Community Information
Subdivision Name: Castle Hill
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 3,684
Stories: 1.0
Lot Size: 1.08 acres
Style: Single Family Residential
Year Built: 1998
Year Renovated: 1999
County: Contra Costa County
APN: 1845000114
Home facts updated by county records on Oct 30, 2026
Around this home
Schools
K - 12
Preschool & daycare
Parkmead Elementary School
Public K-5 • Assigned • 0.4mi
8/10
Walnut Creek Intermediate School
Public 6-8 • Assigned • 1.8mi
9/10
Las Lomas High School
Public 9-12 • Assigned • 0.6mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
0.93% chance of being in a wildfire in next 30 years
4/10 Heat Factor
8 days above 95° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
15 unhealthy days expected this year, 16 days in 30 years
Provided by First Street
Historical weather
Walnut Creek, CA • 94595
Average low and high temperatures (°F)
59
39
62
43
70
47
69
48
76
52
80
54
81
57
86
58
82
60
73
52
63
46
56
43
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.5 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.5 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$2.48M – $3.01M
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