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Duplex with Attached ADU
New
For Sale
$569,900

1803 S 10th Ave, Caldwell, ID 83605

A 1907 farmhouse and legal secondary dwelling share separate utility meters, two driveways, and a three-bay carport.

Property Size4,358 SF
Lot Size0.38 Acres
Price / SF$130.77
Days on Market5

Property Features for 1803 S 10th Ave

General Information

Standard status Active
Size 4,358 SF
Total Parking Spaces 3
Lot size 0.38 Acres
Property subtype Duplex
Zoning H-D

Units

Unit Mix 3BR/2BA + office, 2BR/1BA
Multifamily Units 2
Individually Metered Utilities electricity, water

Additional Details

Utilities to Site Yes

Amenities

covered wraparound porch
ramp access
landscaped yard
mature evergreens
covered patio
exposed-aggregate entertaining area
Lot Features: 10000SF - .49, Irrigation, Sidewalks, Lot Size Units: Acres
Tax Annual Amount: 3504.44, Tax Legal Description: Exhibit A, Tax Year: 2025
Carport YN: t
Gross Income: 45600, Gross Scheduled Income: 3900, Net Operating Income: 28220
Cooling: Central Air, Cooling YN: t
Heating: Forced Air, Natural Gas, Fireplace(s), Heating YN: t
Listing Id: 99004173, Listing Service: Full Service, Listing Terms: Cash, Conventional, Other, List Price: 569900, Mls Status: Active, Number Of Units Total: 2, Standard Status: Active
Parking Features: Carport, Parking Total: 14
Elementary School: Wilson, Elementary School District: Caldwell School District #132, High School: Caldwell, High School District: Caldwell School District #132, Middle Or Junior School: Jefferson, Middle Or Junior School District: Caldwell School District #132
Bedrooms Total: 5
Above Grade Finished Area Units: Square Feet, Below Grade Finished Area Units: Square Feet, Building Area Total: 4358, Building Area Units: Square Feet, Construction Materials: Wood Siding, Living Area: 4358, Living Area Units: Square Feet, Year Built: 1907
Operating Expense: 15100
City: Caldwell, Coordinates: -116.692729, 43.654139, Country: US, County Or Parish: Canyon, Directions: West on I-84, Exit 28, S on 10th Ave, Home will be on the Left, Latitude: 43.654139, Longitude: -116.692729, Postal Code: 83605, State Or Province: ID, Street Dir Prefix: S, Street Name: 10th Ave, Street Number: 1803, Street Number Numeric: 1803, Subdivision Name: DormanS Add, Unparsed Address: 1803 S 10th Ave, Caldwell ID 83605
Current Use: 2-4 Units, Farm Land Area Units: Square Feet, Leasable Area Units: Square Feet, Parcel Number: R3543500000, Property Sub Type: Duplex, Property Type: Residential Income
Bathrooms Total Integer: 3
Electric: Unit 1 Separate Meter, Unit 2 Separate Meter
Fireplace YN: t
Irrigation Source: Irrigation District: Yes, Pioneer Irrigation
Interior Features: Walk In Shower

Building Details

Year Built 1907
Buildings 1
Listing Agency: Boise Premier Real Estate
Listed By: Holden Raulston · License #SP51197
Source: Thgboise
Added: Oct 20 Changed: Oct 23 Last Checked: Oct 23 at 6:38AM

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 Boise Premier Real Estate

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Investment Insights

Based on property information with market context.

This 0.38-acre duplex property combines a 3,218-square-foot farmhouse, built in 1907, with an attached legal ADU of about 920 square feet. The main residence has three bedrooms, two bathrooms, and an office; the ADU includes two bedrooms and one bathroom. Original details in the farmhouse include hardwood floors, a staircase, a brick fireplace, and a covered wraparound porch with ramp access. The grounds feature mature evergreens, a covered patio, and an exposed-aggregate outdoor area. Separate electric and water meters serve the property, with a shared three-bay carport and two driveways.

The property sits directly across from West Valley Medical Center and is zoned H-D (Hospital District). Nearby properties have been converted to medical and professional offices. It is not within a historic district. Commercial use is a possibility subject to verification with the City of Caldwell.

Key Highlights

  • 0.38‑acre property across from West Valley Medical Center
  • 1907 farmhouse with 3 bedrooms, 2 bathrooms, an office, and 3,218 square feet
  • Attached legal ADU with 2 bedrooms, 1 bathroom, and about 920 square feet

Financial Insights

Estimated NOI and Cap Rate

NOI / Yr
$26,147
Cap Rate
4.59%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$522,940 $522.9K
Cap Rate 7%
$373,529 $373.5K
Cap Rate 9%
$290,522 $290.5K
Market Conditions
NOI Build-Up for 4,358 SF
Gross rent
$38.7K $8.88/SF
− Vacancy
−$1.3K −$0.31/SF
EGI
$37.4K $8.57/SF
− OpEx
−$11.2K −$2.57/SF
NOI
$26.1K $6.00/SF
Area
Canyon County, ID
Vacancy
3.48%
Lease Rate
$8.88 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$522,940
Cap Rate 7%
$373,529
Cap Rate 9%
$290,522

Alternative Uses

Best Use
Apartment 5plus
$894.6K
$782.8K – $1.04M (±1% cap)
NOI $62,625 @ 7.0% cap · market cap 10.99%
Second Best
Multifamily LT 5
$373.5K
$326.8K – $435.8K (±1% cap)
NOI $26,147 @ 7.0% cap · market cap 4.59%
Theoretical Best
Office A
$1.16M
$1.02M – $1.35M (±1% cap)
NOI $81,253 @ 7.0% cap · market cap 14.26%
Zoning and permitted uses should be independently verified with authorities. How Realmo checks its estimates

Property Analytics

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Lease Details

2
Residential units
Yes
Utilities to site

Location Intelligence

Trade Area within ½ mile

943
Businesses Nearby

Demographics for 83605, ID

38,561
Population
14,197
Households
2.7
Avg Household Size
32
Median Age
14%
College-Educated
80%
High-School Grad
24.6 sq mi
ZIP Area
1,568
Density / Sq Mi
$60,657
Median Household Income
$31,806
Median Earnings
$973
Median Rent
$300,900
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

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

Frequently Asked Questions

What type of property is this?
Duplex - A 1907 farmhouse and legal secondary dwelling share separate utility meters, two driveways, and a three-bay carport.
Where is this duplex located?
The property is located at 1803 S 10th Ave Caldwell, ID.
What is the asking price?
The asking price for this property is $569,900.
What are key features of this property?
This property features: 0.38‑acre property across from West Valley Medical Center; 1907 farmhouse with 3 bedrooms, 2 bathrooms, an office, and 3,218 square feet; Attached legal ADU with 2 bedrooms, 1 bathroom, and about 920 square feet
More about this property
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