Three-Unit
New
For Sale
$199,900
518 S Helen St., Sioux City, IA 51106
Multi-Unit, Sioux City, IA
Property Size1,584 SF
Lot Size0.20 Acres
Price / SF$126.20
Days on Market2
Property Features for 518 S Helen St.
General Information
Property type
Residential Multi Family
Property subtype
Other
Zoning
nc-4
Bedrooms
3
Bathrooms
3
Full bathrooms
1
Rooms
Bedroom 2, Bathroom 2, Bedroom 3, Bedroom 1, Bathroom 1, Bathroom 3
Elementary school
Spalding
Middle school
East Middle
High school
East High
Directions
GPS
Subdivision
Mside Central
Standard status
Active
APN
894735152008
Size
1,584 SF
Lot size
0.20 Acres
Taxes and HOA fees
Tax Year
2025
Tax Description
TABLE LOT 4 BLK 6
Tax Annual Amount
2284
Legal Description
TABLE LOT 4 BLK 6
Utilities
Heating system
Forced Air
Building Details
Year built
1920
Number of units
3
Listing Agency:
Gateway Real Estate Advisors
(712) 226-8000
Listed By:
Stephanie Dattolico
(712) 898-8091
Added: Oct 28
Changed: Oct 29
Last Checked: Oct 29 at 1:06PM
MLS# 835126
Copyright © 2026 Northwest Iowa Regional Board 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.
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Investment Insights
Based on property information with market context.
This 1,584-square-foot triplex contains three separate residences: a two-bedroom upper unit, a one-bedroom unit on the main level, and a studio at the rear. Updates include newer flooring and other general improvements. The building was constructed in 1920 and has forced-air heating.
The property occupies a 0.2-acre lot at 518 S Helen St. in Sioux City, Iowa, and is zoned NC-4. The owner pays water, sewer, and trash for all three units, along with electricity for the third unit.
The property occupies a 0.2-acre lot at 518 S Helen St. in Sioux City, Iowa, and is zoned NC-4. The owner pays water, sewer, and trash for all three units, along with electricity for the third unit.
Key Highlights
- Three residences: two‑bedroom upper unit, one‑bedroom main‑level unit, and rear studio
- 1,584 square feet on a 0.2‑acre lot
- 1920 construction; forced‑air heating
Financial Insights
Estimated NOI and Cap Rate
NOI / Yr
$12,040
Cap Rate
6.02%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$240,800
$240.8K
Cap Rate 7%
$172,000
$172.0K
Cap Rate 9%
$133,778
$133.8K
Market Conditions
NOI Build-Up for 1,584 SF
Gross rent
$18.1K $11.40/SF
− Vacancy
−$858 −$0.54/SF
EGI
$17.2K $10.86/SF
− OpEx
−$5.2K −$3.26/SF
NOI
$12.0K $7.60/SF
Area
Woodbury County, IA
Vacancy
4.75%
Lease Rate
$11.40 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$240,800
Cap Rate 7%
$172,000
Cap Rate 9%
$133,778
Alternative Uses
Best Use
Multifamily LT 5
$172.0K
$150.5K – $200.7K
NOI $12,040 @ 7.0% cap · market cap 6.02%
Second Best
Apartment 5plus
$158.9K
$139.0K – $185.4K
NOI $11,123 @ 7.0% cap · market cap 5.56%
Theoretical Best
Specialty Retail
$238.0K
$208.3K – $277.7K
NOI $16,662 @ 7.0% cap · market cap 8.34%
Zoning and permitted uses should be independently verified with authorities.
How Realmo checks its estimates
Property Analytics
Who owns this building?
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Open Analytics
Lease Details
3
Residential units
Location Intelligence
Trade Area within ½ mile
393
Businesses Nearby
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Business Placement
Demographics for 51106, IA
28,655
Population
11,681
Households
2.5
Avg Household Size
35
Median Age
27%
College-Educated
93%
High-School Grad
33.5 sq mi
ZIP Area
855
Density / Sq Mi
$74,486
Median Household Income
$40,495
Median Earnings
$1,080
Median Rent
$186,300
Median Home Value
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Market
Vacancy Rate% for Multifamily in Midwest region
Frequently Asked Questions
What type of property is this?
Triplex - Three distinct layouts include a two-bedroom upper unit, a one-bedroom main-level unit, and a rear studio.
Where is this triplex located?
The property is located at 518 S Helen St. Sioux City, IA.
What is the asking price?
The asking price for this property is $199,900.
What are key features of this property?
This property features: Three residences: two‑bedroom upper unit, one‑bedroom main‑level unit, and rear studio; 1,584 square feet on a 0.2‑acre lot; 1920 construction; forced‑air heating
