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About this home
Spacious Hercules Retreat with Open-Space Views, Extensive Upgrades & Potential for ADU Welcome to an exceptional Hercules residence where space, privacy, upgrades, and future potential come together. This expansive 4-bedroom, 3-bathroom home with a dedicated office space offers approximately 2,328 square feet of living space on a generously sized lot backing to open space with no rear neighbors. From top to bottom, the home offers numerous upgrades and improvements, creating a comfortable foundation for today's lifestyle while providing exciting opportunities for future customization. The thoughtfully designed two-story floor plan features a main-level bedroom and full bathroom, offering flexibility for guests, multigenerational living, or a private retreat. A dedicated office space adds another layer of versatility for working from home, studying, or creating a personalized workspace. One of the property's most exciting features is the generously sized backyard, which backs to open space and provides exceptional privacy. The expansive lot offers room to create an outdoor oasis, with possibilities for elegant entertaining, dining, gardening, recreation, or simply enjoying the peaceful surroundings. Explore the Possibilities ADU Potential The property's generous lot and layout also present potential for an accessory dwelling unit (ADU), offering an exciting opportunity for additional living space, guest accommodations, a private workspace, or other future uses. Buyers are encouraged to verify ADU feasibility, permits, zoning, and requirements with the City of Hercules. Notable improvements include a newer roof, sewer lateral compliance, completed inspections, and available property reports, providing valuable peace of mind and a head start for the next owner. With its spacious floor plan, extensive improvements, dedicated office, oversized backyard, open-space setting, and potential for additional living space, this property offers a rare opportunity to create the home and lifestyle you've envisioned. Come experience the space, privacy, and possibilities firsthand. Discover what makes this Hercules residence a truly special opportunity.
Single-familyProperty Type
1978Year Built
9,461 sq ftLot Size
$472Price/Sq.Ft.
1 spaceParking
Listed by Edwin Alvarado•DRE #01404975• LPT Realty
•707-738-5803 (agent)
•edwinrealty@gmail.com (agent)
Listed by Miguel Alvarado•DRE #02113962• LPT Realty
The Astronauts, located between Refugio Valley Road and San Pablo Avenue, is a residential and hillside Hercules neighborhood with curving cul-de-sacs and bay-facing greenbelts. The neighborhood’s character concentrates around the Refugio Valley Road and San Pablo Avenue junction, where daily errands cluster near small shopping plazas and trailhead pullouts. Nearby anchors include the Hercules Waterfront, the Hercules Library, and the John Muir National Historic Site in Martinez. Homes read as late-20th-century California suburbia, with attached garages and stepped lots that follow the terrain. Paths and pocket parks connect to larger open-space corridors, shaping a walk-and-ride routine. The setting feels removed from the freeway grid, with quick visual shifts from rooftops to ridgelines and water.
Provided by Walk Score and Local Logic
Property details
Interior
Exterior
Finance
Kitchen
Bathroom
Bedroom
Living
Interior features
Cathedral ceiling
Updated/remodeled condition
Bedrooms
4 bedrooms
Main level includes bedroom(s)
Bathrooms
3 full bathrooms
Laundry & utility
Gas laundry hookup
Flooring
Laminate flooring
Heating & cooling
Central heating
Central air conditioning
Exterior features
Front landscaping
Home design
Single-family residence
Two-story
Parking
Attached parking
Utilities
Cable available
DSL available
Internet available
Public sewer
HOA & community
No HOA
Not a senior community
Electricity and solar
View estimated energy costs and solar savings for this home
bridgeMLS, Bay East AOR, or Contra Costa AOR #41098310
Jun 23, 2025
Sold
$895,000
$384/sq ft
May 30, 2025
Pending
—
May 21, 2025
Listed
$799,888
$344/sq ft
+28
Spacious Hercules Home with Open Space Views – Endless Potential! Discover the opportunity to own this expansive 4-bedroom, 3-bathroom, two-story home in the heart of Hercules. With 2,328 sq ft of living space and set on a large lot that backs to open space with no rear neighbors, this home offers privacy, serenity, and room to grow. Inside, you'll find a functional layout with a full bedroom and bath on the main level—ideal for guests, home office, or multi-generational living. The oversized backyard is a blank canvas ready for your vision—whether it’s a garden, play area, or outdoor entertainment space, the possibilities are endless. Key updates include a newer roof, sewer lateral compliance, and completed inspections and reports—giving you peace of mind and a head start on making this home your own. Homes with this kind of lot and potential don’t come around often—come see it today and imagine the possibilities!
Public Records
Jun 16, 2021
Sold
$1,000,500
$430/sq ft
bridgeMLS, Bay East AOR, or Contra Costa AOR #40949807
Jun 16, 2021
Sold
$1,000,100
$430/sq ft
May 25, 2021
Pending
—
May 19, 2021
Listed
$848,000
$364/sq ft
+34
Lupine Hills Sanctuary - Enjoy relaxed East Bay living in this spacious 4-bedroom, 3-bath home on a 9,400-square foot lot. The house makes a dramatic first impression as you enter through double doors under a transom window. A light-filled living room leads into a formal dining room and features vaulted ceilings, a fireplace, and a corner bar. The modern kitchen has stainless appliances, a stylish tile backsplash, lots of counter and cabinet space, and an impressive view. The primary suite also has a very nice view of the backyard and surrounding hills as well as a walk-in closet and a remodeled bathroom with a modern, minimalist shower. A connected bonus room overlooks the living room—ideal for an office or library. For additional details: www.457Violet.com
Year
Property tax
Land + Additions
Assessment*
2025
$13,821 (+1.7%)
$443,700 + $469,200
$912,900
2024
$13,587
$467,454 + $467,546
$935,000
2023
$13,583 (−8.1%)
$467,454 + $467,546
$935,000
2022
$14,774 (+53.2%)
$490,000 + $445,000
$935,000
2021
$9,641 (+3.9%)
$510,000 + $510,102
$1,020,102
2020
$9,279 (+1.6%)
$294,855 + $316,299
$611,154
2019
$9,135 (+3.1%)
$291,832 + $313,056
$604,888
2018
$8,862 (+1.6%)
$286,110 + $306,918
$593,028
2017
$8,725 (+154.9%)
$275,000 + $295,000
$570,000
2016
$3,423
$275,000 + $295,000
$570,000
2015
$3,421 (−0.5%)
$38,251 + $120,526
$158,777
2014
$3,437 (+3.3%)
$36,939 + $116,391
$153,330
2013
$3,327 (+6.3%)
$36,939 + $116,391
$153,330
2012
$3,131 (+3.0%)
$36,773 + $115,865
$152,638
2011
$3,039 (+4.0%)
$36,052 + $113,594
$149,646
2010
$2,922 (+0.7%)
$35,346 + $111,367
$146,713
2009
$2,902 (+7.1%)
$35,082 + $110,535
$145,617
2008
$2,709
$35,166 + $110,798
$145,964
Public record
Public record
Zoning
Permits
Beds
4
Baths
3
Stories
2
Lot width
—
Lot depth
—
Lot size
9,460 Sq. Ft.
Year renovated
1995
Finished Sq. Ft.
2,328
Unfinished Sq. Ft.
—
Total Sq. Ft.
2,328
Year built
1978
Style
Single Family Residential
County
Contra Costa County
APN
4062620085
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 13, 2026.
RS-L
Residential Single-Family Low Density District
To provide areas for single-family housing on smaller lots that will generally be developed as part of a larger planned subdivision where a limited number of models of varied exterior designs are built in a random pattern on individual lots with a gross density of 2 to 7 units per acre and a minimum parcel size of 6,000 sq ft unless a smaller lot size is allowed by an approved planned development (PD).
Permitted uses
Include but are not limited to:
Housing-Multiple units
Aug 23, 2019 • Final
Building/residential/rp/repair
Replace the siding on the front of the house and replace windows in the same location and size.
Remodel
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.
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 93° expected this year, 15 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
13 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Hercules, CA • 94547
Average low and high temperatures (°F)
60
41
62
44
69
46
67
47
73
52
74
54
71
55
79
57
78
57
75
53
63
47
57
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.4 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.4 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 457 Violet Rd
$1,092,992
$6,008 under list price of $1.10M
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $895K to $1.0M.