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Duplex with Permitted ADU
For Sale
$1,275,000

509 Washington Street Unit #A & C, Calistoga, CA 94515

R-3 zoning accommodates residential use and professional offices.

Property Size1,553 SF
Price / SF$820.99
Days on Market42

Property Features for 509 Washington Street Unit #A & C

General Information

Standard status Active
Size 1,553 SF
Property subtype Duplex
Zoning R-3

Additional Details

Multifamily Units 2

Amenities

landscaped front yard
patio area
detached garage with built-in cabinetry
laundry facilities
electric car charger
outbuildings
workshop

Building Details

Building Size 1,553 SF
Year Built 2012
Listing Agency: Calistoga Realty Co Inc
Listed By: Brian G Durnian · License #00827250
Source: Aspirarealty
Added: Sep 16 Changed: Oct 27 Last Checked: Oct 26 at 3:24PM

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

Rey
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Investment Insights

Based on property information with market context.

This two-unit residential property combines a custom-finished primary residence with a second unit converted to a permitted two-bedroom ADU in 2026. The primary home dates to 2014; the adjoining unit was built in 2012 and originally designed and permitted for professional offices. R-3 zoning allows residential and professional office use.

Site improvements include a landscaped front yard with patio, a detached garage with built-in cabinetry, laundry facilities and an electric vehicle charger, plus several outbuildings offering storage and workshop space.

Key Highlights

  • Two residential units, including a two‑bedroom ADU permitted in 2026
  • R‑3 zoning allows residential and professional office uses
  • Primary residence built in 2014; adjoining unit built in 2012

Property Analytics

Lease Details

2
Residential units

Location Intelligence

Trade Area within ½ mile

588
Businesses Nearby

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

7% 2022
7.8% 2023
8.6% 2024
8.6% 2025

Frequently Asked Questions

What type of property is this?
Duplex - R-3 zoning accommodates residential use and professional offices.
Where is this duplex located?
The property is located at 509 Washington Street Unit #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, including a two‑bedroom ADU permitted in 2026; R‑3 zoning allows residential and professional office uses; Primary residence built in 2014; adjoining unit built in 2012
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