23 Big Rock Rd is a 2,736 square foot house on a 0.41 acre lot with 4 bedrooms and 4 bathrooms. Based on Redfin's Orinda data, we estimate the home's value is $2,572,313.
Single-familyProperty Type
2021Year Built
0.41 acresLot Size
$940Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,572,313
$12K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 18.6% higher than the average sale price ($2.17M) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
PD
Planned Development District
The specific purposes of the PD planned development district are to: Establish a procedure for the development of large parcels of land in both residential areas and downtown in order to reduce or eliminate the rigidity, delay and inequity that otherwise would result from application of zoning standards and procedures designed primarily for small parcels; Ensure orderly and thorough planning and review procedures that will result in quality design and the creation, improvement and preservation of common open space; Encourage design variety and avoid monotony in large developments by allowing greater freedom in selecting the means to provide access, light, open space and amenity; Provide for flexibility, consistent with the general plan, in the application of certain land use and development regulations found in base districts, such as minimum lot size, lot width or depth, and building Setbacks or heights, to take advantage of unique land use or site characteristics and to preserve unique or significant environmental features, including viewsheds, undisturbed hillsides and ridgelines and wildlife habitat; Encourage the preservation of serviceable existing structures of historic value or artistic merit by providing the opportunity to use them imaginatively for purposes other than that for which they were originally intended; Provide for the protection of the public health, safety and welfare by allowing flexibility in site design and improvement to either avoid or remedy areas subject to hazard, including steep slopes, unstable soil conditions and lands subject to flooding; Allow for the use of the planned development zone only where there is a clear, defined benefit to the citizens of Orinda when contrasted with development options of a different base zone for the subject property. The planned development zone shall not be used as a means to enhance development potential of lands which otherwise may not be able to be developed.
Permitted uses
Include but are not limited to:
No uses permitted by right
Dec 18, 2023 • Final
Building/residential/al/alteration
Install a prefabricated fireplace.
Remodel
Nov 22, 2021 • Final
Building - residential solar photovoltaic
Install solar panels on a residential building. Revisions include changing the inverter system from SolarEdge to Enphase, adding a circuit breaker to the main panel, and updating wire sizes. Relocate the combiner panel into the garage.
Electrical
Solar
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
Interior
Room Information
# of Rooms: 10
Exterior
Property Information
Subdivision Name: SUBDIVISION MAP 9223
Living Sq. Ft: 2,736
Ground Floor Sq. Ft: 1,347
Building Sq. Ft: 2,736
# of Stories: 2
Legal Description: T9223 L14
Parking & Garage Information
Garage/Parking Sq. Ft: 462
Lot Information
# of Buildings: 1
Land Sq. Ft: 17,903
Legal Lot Number: 14
Acres: 0.411
County Use Description: SINGLE FAMILY DETACHED WITH MA
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 2,736
Stories: 2.0
Lot Size: 0.41 acres
Style: Single Family Residential
Year Built: 2021
Year Renovated: 2021
County: Contra Costa County
APN: 2733900142
Home facts updated by county records on Oct 9, 2026
Around this home
Schools
Wagner Ranch Elementary School
Public K-5 • Assigned • 2.5mi
10/10
Orinda Intermediate School
Public 6-8 • Assigned • 2.3mi
10/10
Miramonte High School
Public 9-12 • Assigned • 2.7mi
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
3/10 Fire Factor
0.31% chance of being in a wildfire in next 30 years
3/10 Heat Factor
8 days above 88° expected this year, 18 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
14 unhealthy days expected this year, 15 days in 30 years
Provided by First Street
Historical weather
Orinda, CA • 94563
Average low and high temperatures (°F)
59
42
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69
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47
72
51
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77
56
82
58
79
60
75
55
62
48
56
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
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Dec
Sun exposure
In this area, properties receive around 11.1 hours in
June and 5 hours in December, placing it above the
U.S. average for solar exposure.
11.1 hrs
5 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$2.44M – $2.96M
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