One of a kind 15 acre plus estate lot in the coveted Happy Valley Glen neighborhood; private gated entry with winding road leading to this once in a lifetime opportunity to build your dream home; views of the tree studded rolling hills and the Lafayette reservoir; access to the popular Lafayette Ridge Trail, approximately 6.6 miles long, in Briones Regional Park and its approximate 6,255 acres; Included with the lot purchase are approved plans for an approximate 8,000 square foot estate and an approx. 2,000 sq. ft. garage, an outdoor loggia and pool. Building site will accommodate a level building pad with views of the Oak tree studded hills, Happy Valley, and the Lafayette Reservoir. A wonderful location that is walkable down to Glen Rd. and then to Downtown Lafayette; also just minutes to Bart and Highway 24. This is truly a special property and location!
Happy Valley Glen, located between Happy Valley Road and Mt. Diablo Boulevard, is a residential and semi-rural Lafayette neighborhood with winding lanes and oak-studded hillsides. The scene concentrates around the Happy Valley Road corridor near the Lafayette Community Center, where trailheads, playing fields, and a steady rhythm of local activity set the tone. Architecture leans toward ranch homes, custom builds, and tucked-away estates set back behind mature trees. The landscape reads as creek corridors, horse-friendly parcels, and ridgeline views toward the Diablo foothills. Weekends often orbit the Lafayette Reservoir loop and the Briones Regional Park trail network. For local pillars, Town Bakery & Cafe, Diablo Foods, and the Lesher Center for the Arts anchor everyday rituals beyond the hills.
Provided by Walk Score and Local Logic
Property details
Exterior
Finance
Exterior features
Secluded setting
Irregular and premium parcel
Rolling slopes/rolling terrain
Home design
Land parcel (unimproved)
Zoned residential for single-family use
Construction
Unimproved land
Utilities
Public water available
Public sewer available
Sewer on site
Electricity available
Natural gas available
Phone service available
Water available
Other
Approximately 15.52 acres
Electricity and solar
View estimated energy costs and solar savings for this home
bridgeMLS, Bay East AOR, or Contra Costa AOR #41123345
Feb 7, 2026
Listed
$1,695,000
bridgeMLS, Bay East AOR, or Contra Costa AOR #41090881
Dec 29, 2025
Listing Removed
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Mar 26, 2025
Listed
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bridgeMLS, Bay East AOR, or Contra Costa AOR #41083892
Mar 24, 2025
Listing Removed
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Jan 28, 2025
Listed
*
bridgeMLS, Bay East AOR, or Contra Costa AOR #41056118
Jan 1, 2025
Listing Removed
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Apr 15, 2024
Listed
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bridgeMLS, Bay East AOR, or Contra Costa AOR #41022950
Nov 26, 2023
Listing Removed
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Mar 31, 2023
Listed
*
bridgeMLS, Bay East AOR, or Contra Costa AOR #41017983
Mar 22, 2023
Listing Removed
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Jan 27, 2023
Listed
*
bridgeMLS, Bay East AOR, or Contra Costa AOR #40973328
Jul 19, 2022
Listing Removed
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Nov 4, 2021
Listed
*
bridgeMLS, Bay East AOR, or Contra Costa AOR #40775262
Jul 11, 2018
Listing Removed
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Mar 30, 2017
Listed
*
As the MLS and public records start to fill up, we'll list the details here.
Public record
Public record
Zoning
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Total Sq. Ft.
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Year built
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Style
Vacant Land
County
Contra Costa County
APN
245-070-014-7
Parking Spaces
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Last updated by owner on Apr 8, 2023.
LR-5
Low-Density Residential District-5
The purposes of the low-density residential L-R-5 district include the following: Provide for areas of low-density residential uses consistent with the general plan and with the city’s primary objective of preservation and enhancement of its semi-rural residential character; Promote the health, safety and welfare of the community by protecting the land in the L-R-5 district from uses that would disturb the natural environment and increase geologic, pedologic, seismic, hydrologic or other inherent hazards; Preserve and maintain the scenic, recreational, biotic, historic and other resources of land in the L-R-5 district.
Permitted uses
Include but are not limited to:
Livestock production
Housing-Single unit
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
2% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 95° expected this year, 16 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
Lafayette, CA • 94549
Average low and high temperatures (°F)
60
43
62
46
70
50
68
49
75
52
78
54
79
55
87
58
84
59
77
56
63
48
57
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
81/ 100
Very good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.2 hrs
5.9 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 1240 Monticello Rd
$1,540,833
$154K under list price of $1.70M
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $1.4M to $2.6M.