Two-Unit Duplex with Detached
20843 Chester St Castro Valley, CA 94546
New
For Sale
$1,409,800
MULTI_FAMILY - Castro Valley, CA
Property Size1,590 SF
Lot Size0.26 Acres
Price / SF$886.67
Days on Market3
Property Features for 20843 Chester St
General Information
- Property type
- Residential Multi Family
- Property subtype
- Duplex
- Bedrooms
- 3
- Bathrooms
- 4
- Rooms
- Bathroom 1, Bathroom 4, Laundry Room, Bedroom 3, Bathroom 2, Bathroom 3, Bedroom 1, Bedroom 2
- Parking features
- Off Street, Garage
- 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
- 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
(510) 329-8984
Added: Jul 24
Last Checked: Jul 26 at 6:06PM
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.
This sharp duplex on Chester St features two rental units on a large lot of approximately 11,084 square feet. One unit offers two bedrooms and one bath, and the second unit offers one bedroom and one bath, for approximately 1,590 square feet of living area. The property is nicely landscaped and includes a detached two-car garage along with additional storage improvements.
The home is described as walking distance to an elementary school and a high school, with many shops and restaurants, as well as BART and public transportation nearby. According to the Alameda County Planner, the lot can potentially support up to five accessory dwelling units.
A commercial retail building next door is also listed for sale, providing additional adjacent redevelopment or expansion flexibility for qualified buyers.
The home is described as walking distance to an elementary school and a high school, with many shops and restaurants, as well as BART and public transportation nearby. According to the Alameda County Planner, the lot can potentially support up to five accessory dwelling units.
A commercial retail building next door is also listed for sale, providing additional adjacent redevelopment or expansion flexibility for qualified buyers.
Key Highlights
- Duplex with 2BD/1BA unit and 1BD/1BA unit
- Approximately 1,590 SF of living area
- Large lot of approximately 11,084 SF
Financial Insights For Multifamily LT 5
Simulate Cap Rate and NOI
NOI Build-Up
- 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.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $81.1k | $51.00 |
| − Vacancy | −$4.8k | −$3.05 |
| EGI | $76.2k | $47.95 |
| − OpEx | −$22.9k | −$14.39 |
| NOI | $53.4k | $33.57 |
1,590 SF · lease $51.00/SF/yr · vacancy 5.98% · expense 30.00%
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 local authorities.
Property Analytics
Property Profile
Location Intelligence
Current Use by Public Records
Duplexes
FAQs
What type of property is this?
Duplex - Duplex with two bedrooms and one bath plus one bedroom and one bath, with detached two-car garage and storage.
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: Duplex with 2BD/1BA unit and 1BD/1BA unit; Approximately 1,590 SF of living area; Large lot of approximately 11,084 SF
