Two-Unit Duplex with Detached
For Sale
$1,409,800
20843 Chester St, Castro Valley, CA 94546
Residential Income, Castro Valley, CA
Property Size1,590 SF
Lot Size0.26 Acres
Price / SF$886.67
Days on Market49
Property Features for 20843 Chester St
General Information
Property type
Residential Multi Family
Property subtype
Duplex
Bedrooms
3
Bathrooms
4
Full bathrooms
4
Rooms
Bathroom 4, Bathroom 1, Bedroom 2, Bedroom 1, Bathroom 2, Bathroom 3, Bedroom 3, Laundry Room
Parking features
Garage, Off Street
Window features
Window Coverings
Interior features
Tub w/Shower Over
Exterior features
Front Yard, Garden/Play, Storage Area, Yard Space
Fencing
Partial, Fenced
Appliances
Dishwasher, Disposal, Gas Water Heater
Subdivision
Downtown
Lot features
Cul-De-Sac, Level, Premium Lot, Front Yard, Landscaped, Paved
Elementary school district
Castro Valley (510) 537-3000
High school district
CASTRO VALLEY UNIFIED SCHOOL DISTRICT
Directions
Castro Valley Blvd. Left or Right on Chester St..
Standard status
Active
APN
84A3762
Size
1,590 SF
Lot size
0.26 Acres
Utilities
Sewer type
Public Sewer
Heating system
Natural Gas
Cooling system
Ceiling Fan(s)
Water source
Public
Building Details
Year built
1949
Number of units
2
Flooring type
Carpet, Laminate
Building materials
Stucco
Roof type
Composition
Additional Structures
Storage
Listing Agency:
Vetted Real Estate
(510) 886-1100
Listed By:
David Wilhite · License #00759835
(510) 329-8984
Added: Jul 24
Changed: Sep 8
Last Checked: Sep 10 at 10:06AM
MLS# 41142494
Copyright © 2026 Bay East. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Investment Insights
Based on property information with market context.
Located at 20843 Chester St in Castro Valley, this duplex contains approximately 1,590 square feet of living area on a 0.26-acre lot. The unit mix includes one two-bedroom, one-bath residence and one one-bedroom, one-bath residence. Built in 1949, the property features stucco construction, laminate and carpet flooring, natural-gas heating, ceiling fans, public water, and public sewer. A detached two-car garage, storage areas, fenced yard space, front landscaping, and garden/play areas provide additional functional improvements.
The property is within walking distance of an elementary school, high school, shops, restaurants, BART, and public transportation. Per the Alameda County Planner, the lot can potentially accommodate 5 Accessory Dwelling Units. A commercial retail building next door is also available for sale, creating an opportunity to evaluate the properties together.
The property is within walking distance of an elementary school, high school, shops, restaurants, BART, and public transportation. Per the Alameda County Planner, the lot can potentially accommodate 5 Accessory Dwelling Units. A commercial retail building next door is also available for sale, creating an opportunity to evaluate the properties together.
Key Highlights
- Approximately 1,590 square feet of living area on a 0.26‑acre lot
- Unit mix includes one 2‑bedroom, 1‑bath unit and one 1‑bedroom, 1‑bath unit
- Detached 2‑car garage plus storage improvements
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$53,369
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
3.79%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$1,067,380
$1.1M
Cap Rate 7%
$762,414
$762.4K
Cap Rate 9%
$592,989
$593.0K
Market Conditions
NOI Build-Up for 1,590 SF
Vacancy — income lost from leasable area expected to sit empty during the year, subtracted from gross rent.
EGI (Effective Gross Income) — gross rent minus vacancy losses, the realistic income before paying operating costs.
OpEx (Operating Expenses) — recurring costs to operate the property (property tax, insurance, utilities, maintenance, management); excludes financing and capital improvements.
NOI (Net Operating Income) — income a property generates after operating costs but before financing and taxes.
Gross rent
$81.1K $51.00/SF
− Vacancy
−$4.8K −$3.05/SF
EGI
$76.2K $47.95/SF
− OpEx
−$22.9K −$14.39/SF
NOI
$53.4K $33.57/SF
Area
Alameda County, CA
Vacancy
5.98%
Lease Rate
$51.00 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$1,067,380
Cap Rate 7%
$762,414
Cap Rate 9%
$592,989
Alternative Uses
Best Use
Multifamily LT 5
$762.4K
$667.1K – $889.5K
NOI $53,369 @ 7.0% cap · market cap 3.79%
Second Best
Apartment 5plus
$329.0K
$287.9K – $383.9K
NOI $23,033 @ 7.0% cap · market cap 1.63%
Theoretical Best
Retail
$7.25M
$6.34M – $8.46M
NOI $507,411 @ 7.0% cap · market cap 35.99%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
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Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
2,523
Businesses Nearby
Explore this area
Business Placement
Demographics for 94546, CA
46,687
Population
16,398
Households
2.8
Avg Household Size
40
Median Age
41%
College-Educated
90%
High-School Grad
16.0 sq mi
ZIP Area
2,918
Density / Sq Mi
$125,780
Median Household Income
$66,737
Median Earnings
$2,506
Median Rent
$976,300
Median Home Value
Check the figures for this property
Cap Rate, Value Estimation, Potential NOI and more
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Market
Vacancy Rate% for Multifamily in West region
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Frequently Asked Questions
What type of property is this?
Duplex - Two separately configured units occupy a landscaped lot with garage and additional storage improvements.
Where is this duplex located?
The property is located at 20843 Chester St Castro Valley, CA.
What is the asking price?
The asking price for this property is $1,409,800.
What are key features of this property?
This property features: Approximately 1,590 square feet of living area on a 0.26‑acre lot; Unit mix includes one 2‑bedroom, 1‑bath unit and one 1‑bedroom, 1‑bath unit; Detached 2‑car garage plus storage improvements
