Duplex with New ADU

113/115 Alderson Avenue Billings, MT 59101

Claim this Listing
New
For Sale
$500,000

MULTI_FAMILY - Billings, MT

Property size:
2,949 SF
Lot size:
0.16 Acres
Price / SF:
$169/SF
Added:
Jul 12, 2026
Days on Market:
1
Last Refresh:
Jul 12 at 6:06 pm

Property Features for 113/115 Alderson Avenue

General Information

Property type
Residential Multi Family
Property subtype
Other
Bedrooms
6
Rooms
Bedroom 3, Bedroom 5, Bedroom 2, Bedroom 4, Bathroom 1, Bathroom 2, Bedroom 6, Bedroom 1
Parking
5
Standard status
Active
APN
A17776
Size
2,949 SF
Lot size
0.16 Acres

Taxes and HOA fees

Tax Description
WEST SIDE ADD, S04, T01 S, R26 E, BLOCK 8, Lot 7 - 8
Tax Annual Amount
2912

Utilities

Sewer type
Public Sewer
Heating system
Natural Gas, Forced Air
Cooling system
Central Air
Water source
Public

Building Details

Year built
1916
Number of units
2

Listing agent Todd Harp License #RRE-BRO-LIC-136388

Listing office Century 21 Americana 1605 Shiloh Rd, Billings, MT

Listing date Jul 12, 2026

MLS# 360556 Listing URL

Copyright © 2026 Billings Association of Realtors. 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 residential income property combines a 1916 bungalow with a new construction ADU, creating a layout that supports multiple living arrangements. The home’s overall configuration is designed to offer flexibility for owner-occupancy with rental income, extended family use, or portfolio expansion.

The listing describes the property as providing quick access to downtown, hospitals, shopping, dining, and everyday amenities.

Set on a 0.1607-acre lot, the property totals 2,949 square feet across the existing home and the new ADU, with the on-site improvements intended to broaden practical options for long-term living or rental use.

Key Highlights

  • 1916 bungalow plus a newly constructed ADU
  • Central air conditioning with forced air heating and natural gas
  • Public water and public sewer

Local 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 $40.7k $13.80
− Vacancy −$2.2k −$0.76
EGI $38.5k $13.04
− OpEx −$11.5k −$3.91
NOI $26.9k $9.13
2,949 SF · lease $13.80/SF/yr · vacancy 5.50% · expense 30.00%

Alternative Uses

Best Use
Multifamily LT 5
$384.6K
$336.5K – $448.7K (±1% cap)
NOI $26,921 @ 7.0% cap · market cap 5.38%
Second Best
Apartment 5plus
$356.6K
$312.0K – $416.0K (±1% cap)
NOI $24,962 @ 7.0% cap · market cap 4.99%
Theoretical Best
Office A
$643.5K
$563.0K – $750.7K (±1% cap)
NOI $45,042 @ 7.0% cap · market cap 9.01%
Zoning and permitted uses should be independently verified with local authorities.

Property Analytics

Property Profile Location Intelligence

Current Use by Public Records

Duplexes

Suggested Use

Grocery & Convenience Store (Bike/Boat/Book/etc) Store Storage Facility Locksmith Cosmetic Store Pet Store & Service (Bike/Boat/Book/etc) Store Fish Market Pet Grooming Service Florist

Zoning and permitted uses should be independently verified with local authorities.

FAQs

What type of property is this?
Duplex - New construction ADU complements a 1916 bungalow in a residential income property offering flexible living and rental configurations.
Where is this duplex located?
The property is located at 113/115 Alderson Avenue Billings, MT.
What is the asking price?
The asking price for this property is $500,000.
What are key features of this property?
This property features: 1916 bungalow plus a newly constructed ADU; Central air conditioning with forced air heating and natural gas; Public water and public sewer
Contact an agent
More about this property
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