1644 Las Trampas Rd is a 3,244 square foot house on a 1.45 acre lot with 3 bedrooms and 4 bathrooms. - it last sold on July 01, 1979 for $220,000. Based on Redfin's Alamo data, we estimate the home's value is $2,745,779.
Single-familyProperty Type
1971Year Built
1.45 acresLot Size
$846Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,745,779
$2.5M since sold in July 1979$48K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1% lower than the average sale price ($2.77M) 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.
Permits
Sep 22, 2025 • Active
Building - residential mechanical
Replace a condenser with a coil in the back yard and a furnace in a closet. No electrical work is included. A HERS report may be required at final inspection.
HVAC
Jun 22, 2022 • Final
Building - residential mechanical
Install a new duct system with supplies. A HERS report is required at the final inspection.
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
Interior
Room Information
# of Rooms: 9
Exterior
Property Information
Subdivision Name: SAN RAMON RHO
Living Sq. Ft: 3,244
Ground Floor Sq. Ft: 1,581
Building Sq. Ft: 3,244
# of Stories: 2
Legal Description: PORS RO SAN RAMON & SEC 13 T1S R2W 1.452 AC
Parking & Garage Information
Garage/Parking Sq. Ft: 545
Lot Information
# of Buildings: 1
Land Sq. Ft: 63,249
Acres: 1.452
Zoning Code: A-2
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 4.0
Sq. Ft.: 3,244
Stories: 2.0
Lot Size: 1.45 acres
Style: Single Family Residential
Year Built: 1971
Year Renovated: 1972
County: Contra Costa County
APN: 1982000034
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Rancho Romero Elementary School
Public K-5 • Assigned • 0.6mi
9/10
Stone Valley Middle School
Public 6-8 • Assigned • 1.3mi
10/10
San Ramon Valley High School
Public 9-12 • Assigned • 2.2mi
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
0.62% chance of being in a wildfire in next 30 years
3/10 Heat Factor
9 days above 93° 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
Alamo, CA • 94507
Average low and high temperatures (°F)
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80
55
86
58
83
57
76
53
62
44
56
43
Jan
Feb
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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
$2.61M – $3.16M
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