2020 Trefoil Rd is a 2,378 square foot house on a 5,220 square foot lot with 4 bedrooms and 3.5 bathrooms. Based on Redfin's San Ramon data, we estimate the home's value is $1,731,324.
Single-familyProperty Type
2018Year Built
5,220 sq ftLot Size
$728Est. Price/Sq.Ft.
2 spacesParking
Source:Public Records
$1,818,995
Updated Dec 25, 2025
Based on recent home sales selected by the homeowner.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$17,068 (+2.4%)
$802,078 + $506,942
$1,309,020
2024
$16,665 (+1.7%)
$786,351 + $497,002
$1,283,353
2023
$16,387 (+1.4%)
$770,933 + $487,257
$1,258,190
2022
$16,167 (+2.6%)
$755,817 + $477,703
$1,233,520
2021
$15,757 (+1.2%)
$740,998 + $468,337
$1,209,335
2020
$15,578 (+1.5%)
$726,469 + $459,154
$1,185,623
2019
$15,342 (+144.1%)
$719,020 + $454,446
$1,173,466
2018
$6,285 (+86.5%)
$704,922 + $445,536
$1,150,458
2017
$3,370 (+9.4%)
$281,681
2016
$3,079
$281,681
Tax history for 2020 Trefoil Rd
Year
Property tax
Land + Additions
Assessment*
2025
$17,068 (+2.4%)
$802,078 + $506,942
$1,309,020
2024
$16,665 (+1.7%)
$786,351 + $497,002
$1,283,353
2023
$16,387 (+1.4%)
$770,933 + $487,257
$1,258,190
2022
$16,167 (+2.6%)
$755,817 + $477,703
$1,233,520
2021
$15,757 (+1.2%)
$740,998 + $468,337
$1,209,335
2020
$15,578 (+1.5%)
$726,469 + $459,154
$1,185,623
2019
$15,342 (+144.1%)
$719,020 + $454,446
$1,173,466
2018
$6,285 (+86.5%)
$704,922 + $445,536
$1,150,458
2017
$3,370 (+9.4%)
$281,681
2016
$3,079
$281,681
*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
DVSP
Planned Development Zone
The PD zone is applied to large parcels of land in order to reduce or eliminate the rigidity, delays, and conflicts that otherwise would result from application of zoning standards and procedures designed primarily for small parcels, and to: Ensure orderly and thorough planning and review procedures that will result in quality urban design; Encourage variety and avoid monotony in large developments by allowing greater freedom in selecting the means to provide access, light, open space, and amenity; Provide a mechanism whereby the City may authorize desirable developments consistent with the General Plan without inviting speculative rezoning applications, which, if granted, often could deprive other owners of development opportunities without resulting in construction of the proposed facilities; Encourage allocation and improvement of common open space in residential areas, and provide for open space maintenance at the expense of those who will directly benefit from it; and Encourage the assembly of properties that might otherwise be developed in unrelated increments to the detriment of surrounding neighborhoods. Building intensity may be up to the maximum required by the General Plan land use classification applicable to the site. The PD zone is consistent with and implements all land use classifications of the General Plan.
Zone overlays
Dougherty Valley Specific Plan
Mar 30, 2018 • Final
Building/residential/r/new single family-duplex
Construct a new single-family home.
New construction
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: 9
Exterior
Property Information
Subdivision Name: GALE RANCH SUBDIVSION 9341
Living Sq. Ft: 2,378
Ground Floor Sq. Ft: 794
Building Sq. Ft: 2,378
# of Stories: 2
Legal Description: T9341 L67
Parking & Garage Information
Garage/Parking Sq. Ft: 459
Lot Information
# of Buildings: 1
Land Sq. Ft: 2,520
Legal Lot Number: 67
Acres: 0.0579
County Use Description: SINGLE FAMILY DETACHED WITH MA
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.5
Sq. Ft.: 2,378
Stories: 2.0
Parking Spaces: 2
Basement: No
Accessible: Yes
Lot Size: 5,220 square feet
Style: Single Family Residential
Year Built: 2018
Year Renovated: 2018
County: Contra Costa County
APN: 2227600315
HOA Dues: $100/month
Garage: Yes
Features: Views
Home facts updated by owner on Mar 21, 2025
Around this home
Schools
Bella Vista Elementary
Public K-5 • Assigned • 0.2mi
8/10
Gale Ranch Middle School
Public 6-8 • Assigned • 1.1mi
10/10
Dougherty Valley High School
Public 9-12 • Assigned • 1.3mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
During the last 30 days, San Ramon's market has remained balanced. Buyers enjoy more choices and negotiating opportunities, while seller continuing seeing strong demand for turnkey homes with modern upgrades, functional layout and desirable...
San Ramon is best known for its seamless mix of outdoor recreation and modern conveniences. City Center Bishop Ranch is a major hub for dining, boutique shopping, and weekend events, while the Iron Horse Trail runs right through town, making it super...
San Ramon properties move fast, going pending in just 14 days. With fierce competition at the $1.6M median price, multiple offers and waived contingencies are the norm. Buyers must act decisively and submit their strongest offer immediately to win.