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Quadplex with Private Entrances

133 E 21st Street Idaho Falls, ID 83404

Claim this Listing
For Sale
$517,000

MULTI_FAMILY - Idaho Falls, ID

Property size:
3,800 SF
Lot size:
0.22 Acres
Price / SF:
$136/SF
Added:
Jun 26, 2026
Days on Market:
15
Last Refresh:
Jul 10 at 8:06 pm

Property Features for 133 E 21st Street

General Information

Property type
Residential Multi Family
Property subtype
Other
Bedrooms
6
Bathrooms
5
Rooms
Bedroom 1, Bedroom 3, Bathroom 3, Bedroom 2, Basement, Bathroom 4, Bedroom 5, Bedroom 4, Bathroom 5, Bathroom 2, Bedroom 6, Bathroom 1
Parking
2
Parking features
Off Street, Garage
Patio and Porch features
Deck
Interior features
Newly Renovated, Storage
Fireplace
1
Basement
Daylight, Finished
Appliances
Dishwasher, Dryer, Microwave, Refrigerator, Oven, Washer
Standard status
Active
APN
RPA03200
Size
3,800 SF
Lot size
0.22 Acres

Taxes and HOA fees

Tax Year
2024
Tax Description
Lots 31-33, Block 13 BrodbecksNE 1/4, SEC 30 TN, R 38 Units 2
Tax Annual Amount
3713

Utilities

Sewer type
Public Sewer
Heating system
Electric (Heating), Central, Ductless (Heating), Fireplace(s), Forced Air, Natural Gas
Cooling system
Zoned, Central Air, Ductless
Water source
Public

Building Details

Year built
1975
Number of units
4
Building materials
Block, Frame, Brick, Metal Siding, Stone, Vinyl Siding
Roof type
Composition
Additional Structures
Storage

Listing agent Steven Phaysounlaphong

Listing office Silvercreek Realty Group 2002 Jennie Lee Dr, Meridian, ID

Listing date Jun 26, 2026

MLS# 2186082 Listing URL

Copyright © 2026 Snake River Regional MLS. 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 four-unit quadplex includes two dwellings on one lot, with each unit having its own private entrance. The front home offers an upper 2-bedroom unit with an additional finished bonus or flex room currently used as a primary bedroom, along with a recently remodeled 2-bedroom basement unit. The second dwelling includes 1-bedroom upper and lower units, with the lower unit recently remodeled and featuring an additional finished flex room for extra usable living space. The property also features recent improvements including a new community laundry room with two washers and two dryers, and the back dwelling has its own washer and dryer.

The property sits on a 0.22-acre lot in Idaho Falls, Idaho, and is served by Idaho Falls Power. There are two separate fenced yards, separate driveways for each dwelling, and private entry access for every unit.

With four rental units configured for resident privacy and separate access, this property may appeal to buyers seeking a turnkey, income-producing multifamily investment. Tenants pay their own utilities and maintenance, and the units are currently fully occupied. The listing notes no seller financing.

Key Highlights

  • Two dwellings on one lot with 4 rental units; all units currently fully occupied
  • Approx. $4,400/month rental income with long history of consistent occupancy
  • Each unit has its own private entrance; two separate fenced yards and separate driveways for each dwelling

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 $47.9k $12.60
− Vacancy −$2.2k −$0.57
EGI $45.7k $12.03
− OpEx −$13.7k −$3.61
NOI $32.0k $8.42
3,800 SF · lease $12.60/SF/yr · vacancy 4.50% · expense 30.00%

Alternative Uses

Best Use
Multifamily LT 5
$457.3K
$400.1K – $533.5K (±1% cap)
NOI $32,008 @ 7.0% cap · market cap 6.19%
Second Best
Apartment 5plus
$413.6K
$361.9K – $482.5K (±1% cap)
NOI $28,952 @ 7.0% cap · market cap 5.60%
Theoretical Best
Office A
$839.6K
$734.6K – $979.5K (±1% cap)
NOI $58,769 @ 7.0% cap · market cap 11.37%
Zoning and permitted uses should be independently verified with local authorities.

Property Analytics

Property Profile Location Intelligence

Current Use by Public Records

Quadplexes

Suggested Use

(Bike/Boat/Book/etc) Store Grocery & Convenience Store Locksmith Veterinary Clinic (Bike/Boat/Book/etc) Store (Bike/Boat/Book/etc) Store (Bike/Boat/Book/etc) Store (Bike/Boat/Book/etc) Store Wine and Liquor Store Tanning Salon

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

FAQs

What type of property is this?
Quadplex - Four rental units on one lot with separate fenced yards and driveways for each dwelling.
Where is this quadplex located?
The property is located at 133 E 21st Street Idaho Falls, ID.
What is the asking price?
The asking price for this property is $517,000.
What are key features of this property?
This property features: Two dwellings on one lot with 4 rental units; all units currently fully occupied; Approx. $4,400/month rental income with long history of consistent occupancy; Each unit has its own private entrance; two separate fenced yards and separate driveways for each dwelling
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