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About this home
GREAT OPPORTUNITY FOR INVESTORS! Both units have been renovated and feature updated electrical and plumbing systems, vinyl plank flooring as well as modernized kitchens and bathrooms with new cabinetry, countertops, vanities, fixtures, showers, and toilets. Additional features include newer double-glazed windows and a laundry room in each unit. The adjacent lot is part of the property, offering ample parking for multiple vehicles and potential space for an RV, boat, or work trucks. Utilities and space are already in place, making the construction of an additional Accessory Dwelling Unit (ADU) a viable possibility. The property enjoys a prime location near the revitalized downtown area, restaurants, and the marina. It represents an excellent investment opportunity to maximize rental income.
Multi-familyProperty Type
1925Year Built
6,250 sq ftLot Size
$320Price/Sq.Ft.
Listed by Arturo Valerio•DRE #01267522• Park Lane Capital
Tenth Street, located between Railroad Avenue and Harbor Street, is a residential and industrial Pittsburg neighborhood with a grid of older blocks and a working-waterfront edge. The neighborhood’s character concentrates around Railroad Avenue near 10th Street, where small storefronts, service counters, and street-corner signage set a practical, day-to-day rhythm. Housing reads as modest early-to-mid-century homes mixed with light-industrial yards and warehouse buildings. The shoreline nearby adds open sky and long views across Suisun Bay. Civic errands and local gatherings orbit around Old Town Pittsburg’s main streets. The feel is straightforward and rooted in the city’s rail-and-port history.
Provided by Walk Score and Local Logic
Property details
Interior
Exterior
Finance
Interior features
Updated bathrooms and kitchens
Formal entry
Built-in storage
Shower stalls and tub/shower combinations
Bedrooms
Two units (see unit details for bedroom counts)
Bathrooms
Unit 1: 1 bathroom
Unit 2: 1 bathroom
Kitchen
Updated kitchens
Laundry & utility
Dedicated laundry room
Gas water heater
Flooring
Vinyl flooring
Heating & cooling
Heating present
Ceiling fans for cooling
Exterior features
Back yard with patio
Dog run
Exterior storage
Fenced yard
Level lot
Home design
Duplex (residential income property)
Store(s) included on-site
Built in 1925
Parking
Total of 6 parking spaces
Parking lot with street parking and side yard access
RV parking possible
Construction
Stucco and wood siding exterior
Utilities
Public water
Public sewer
Electric service includes other/solar
Financial info
Two-unit income property
Electricity and solar
View estimated energy costs and solar savings for this home
bridgeMLS, Bay East AOR, or Contra Costa AOR #41148953
Sep 21, 2026
Listed
$680,000
$320/sq ft
bridgeMLS, Bay East AOR, or Contra Costa AOR #41125619
Mar 27, 2026
Sold
$460,000
$217/sq ft
Mar 13, 2026
Pending
—
Mar 2, 2026
Listed
$489,000
$230/sq ft
+49
INVESTORS OPPORTUNITY! VACANT DUPLEX . This property offers strong potential investors looking to add value and generate income. The Duplex features two units: First floor unit: 2 Bedrooms, 1 Bathroom, and an open-concept layout combining the family room and kitchen, plus a separate laundry room. Second Unit (upper level) 3 bedrooms, 1 bathroom, family room and living room. The lot size Sq.Ft. 6,250. The property does require some updates and repairs, making it ideal to investors or buyers looking to renovate and build equity. Live in one unit and rent the other to help offset your mortgage, or add this property your rental portfolio and maximize its income potential. A desirable downtown location with upside potential.
Public Records
May 8, 1984
Sold
$62,000
$29/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$7,131 (+173.6%)
$239,292 + $280,908
$520,200
2024
$2,606 (−2.0%)
$234,600 + $275,400
$510,000
2023
$2,660 (−0.7%)
$45,678 + $80,209
$125,887
2022
$2,680 (+1.3%)
$44,783 + $78,637
$123,420
2021
$2,646 (+3.3%)
$43,905 + $77,096
$121,001
2020
$2,561 (+2.7%)
$43,045 + $75,585
$118,630
2019
$2,495 (+3.8%)
$42,604 + $74,810
$117,414
2018
$2,404 (+2.0%)
$41,769 + $73,344
$115,113
2017
$2,356 (+9.3%)
$40,148 + $70,497
$110,645
2016
$2,156 (−3.9%)
$40,148 + $70,497
$110,645
2015
$2,244 (+3.7%)
$39,361 + $69,115
$108,476
2014
$2,163 (+2.9%)
$38,011 + $66,744
$104,755
2013
$2,102 (+3.1%)
$38,011 + $66,744
$104,755
2012
$2,038 (+3.2%)
$37,840 + $66,443
$104,283
2011
$1,976 (+5.8%)
$37,099 + $65,141
$102,240
2010
$1,867 (−0.1%)
$36,372 + $63,864
$100,236
2009
$1,869 (+9.2%)
$36,101 + $63,387
$99,488
2008
$1,711
$36,187 + $63,538
$99,725
Public record
Public record
Zoning
Beds
4
Baths
2
Stories
2
Lot width
—
Lot depth
—
Lot size
6,250 Sq. Ft.
Year renovated
1925
Finished Sq. Ft.
1,786
Unfinished Sq. Ft.
—
Total Sq. Ft.
1,786
Year built
1925
Style
Multi-Family (2-4 Unit)
County
Contra Costa County
APN
0852230101
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 13, 2026.
RM-D
Downtown Medium-Density Residential District
To provide opportunities for residential development with increased land coverages for attached or detached single-family residences and multifamily residences such as townhouses, apartment complexes with 16 or more units, and condominiums. Duplexes and multifamily dwellings such as triplexes and fourplexes existing as of the effective date of the ordinance codified in this title are allowed to remain.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Multiple units
Housing-Other
Infrastructure
Communications tower
Climate risks
10/10 Flood Factor
Estimated 80%+ chance of a flood reaching the building in the next 30 years
2/10 Fire Factor
0.00% chance of being in a wildfire in next 30 years
5/10 Heat Factor
7 days above 100° 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
14 unhealthy days expected this year, 14 days in 30 years
Provided by First Street
Historical weather
Pittsburg, CA • 94565
Average low and high temperatures (°F)
60
41
64
46
72
52
72
52
79
56
85
60
85
59
91
63
86
61
78
57
64
48
56
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 12.1 hours in
June and 4.8 hours in December, placing it above the
U.S. average for solar exposure.
12.1 hrs
4.8 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 231 W 9th St
$678,509
$1,491 under list price of $680K
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $575K to $649K.