Residential Duplex with Detached
509 Washington St #A & C, Calistoga, CA 94515
For Sale
$1,275,000
Two separate residences include a custom-finished home and a permitted two-bedroom ADU.
Property Size1,553 SF
Price / SF$820.99
Days on Market55
Property Features for 509 Washington St #A & C
General Information
Standard status
Size
Property subtype
Zoning
Units
Unit Mix
Multifamily Units
Amenities
landscaped front yard
patio area
detached garage
laundry facilities
electric car charger
storage
workshop
Building Details
Year Built
Listing Agency:
Calistoga Realty Co Inc
Listed By:
Brian G Durnian · License #DRE #00827250
(707) 942-9422
Source:
Somorealty
Added: Sep 16
Changed: Nov 8
Last Checked: Nov 8 at 9:45AM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Calistoga Realty Co Inc
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Review the available facts, identify missing information and prepare questions for the agent.
Investment Insights
Based on property information with market context.
The property comprises two residential units on an R-3-zoned parcel. The main residence was built in 2014 with custom finishes, while the adjacent unit, originally designed and permitted for professional offices, was converted to a two-bedroom ADU with permits in 2026. A landscaped front yard and patio provide outdoor space.
A detached garage includes built-in cabinetry, laundry facilities, and an electric vehicle charger. Additional outbuildings provide storage and workshop space. R-3 zoning allows professional offices and multifamily residential use.
A detached garage includes built-in cabinetry, laundry facilities, and an electric vehicle charger. Additional outbuildings provide storage and workshop space. R-3 zoning allows professional offices and multifamily residential use.
Key Highlights
- Two residential units on an R‑3‑zoned parcel
- Adjacent unit converted to a permitted two‑bedroom ADU in 2026
- Main residence built in 2014 with custom finishes
Property Analytics
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
1
Businesses Nearby
Explore this area
Business Placement
Demographics for 94515, CA
6,834
Population
3,214
Households
2.1
Avg Household Size
48
Median Age
36%
College-Educated
79%
High-School Grad
115.5 sq mi
ZIP Area
59
Density / Sq Mi
$97,202
Median Household Income
$50,189
Median Earnings
$1,830
Median Rent
$830,700
Median Home Value
Market
Vacancy Rate% for Multifamily in West region
Frequently Asked Questions
What type of property is this?
Duplex - Two separate residences include a custom-finished home and a permitted two-bedroom ADU.
Where is this duplex located?
The property is located at 509 Washington St #A & C Calistoga, CA.
What is the asking price?
The asking price for this property is $1,275,000.
What are key features of this property?
This property features: Two residential units on an R‑3‑zoned parcel; Adjacent unit converted to a permitted two‑bedroom ADU in 2026; Main residence built in 2014 with custom finishes
