Two-Unit
521 12TH Avenue Green Bay, WI 54303
For Sale
$189,900
MULTI_FAMILY - GREEN BAY, WI
Property Size1,519 SF
Lot Size0.09 Acres
Price / SF$125.02
Days on Market47
Property Features for 521 12TH Avenue
General Information
- Property type
- Residential Multi Family
- Property subtype
- Duplex
- Zoning
- 2 Family/Duplex
- Standard status
- Active
- APN
- 2-660
- Size
- 1,519 SF
- Lot size
- 0.09 Acres
Taxes and HOA fees
- Tax Year
- 2025
- Tax Annual Amount
- 1699
Utilities
- Sewer type
- Public Sewer
- Heating system
- Forced Air
- Water source
- Public
Building Details
- Year built
- 1903
- Number of units
- 2
- Building materials
- Vinyl Siding
Listing Agency:
Keller Williams Green Bay
(920) 632-7702
Listed By:
Alexander J. Young
(920) 632-7702
Added: Jun 11
Changed: Jul 26
Last Checked: Jul 27 at 12:06AM
MLS# 50327261
Copyright © 2026 Realtor Association of Northeast Wisconsin. 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 two-unit duplex is zoned for 2 family/duplex use and offers two separate living areas. The main floor unit includes two bedrooms and one bathroom. The upstairs unit features one bedroom and one bathroom. The property is described as built solid and ready for the next owner, and it has a total property size of 1,519 square feet on a 0.09-acre lot.
Located at 521 12TH Avenue in Green Bay, Wisconsin (Brown County), the duplex is presented as being minutes from shopping, restaurants, and downtown Green Bay. Showings require 24-hour notice, and prospective buyers should plan accordingly when scheduling an in-person tour.
The unit mix can be practical for tenants seeking different layouts within the same building, with a larger main-floor arrangement and a smaller upstairs configuration. For an owner-occupant, the property also provides the option of living in one unit while renting the other, depending on your personal goals and how you choose to manage the property. For investors, the straightforward two-unit structure aligns with a residential income strategy focused on maintaining two rentable spaces under one roof.
Located at 521 12TH Avenue in Green Bay, Wisconsin (Brown County), the duplex is presented as being minutes from shopping, restaurants, and downtown Green Bay. Showings require 24-hour notice, and prospective buyers should plan accordingly when scheduling an in-person tour.
The unit mix can be practical for tenants seeking different layouts within the same building, with a larger main-floor arrangement and a smaller upstairs configuration. For an owner-occupant, the property also provides the option of living in one unit while renting the other, depending on your personal goals and how you choose to manage the property. For investors, the straightforward two-unit structure aligns with a residential income strategy focused on maintaining two rentable spaces under one roof.
Key Highlights
- West Green Bay duplex built in 1903
- Two units: main floor has 2 bedrooms and 1 bathroom; upstairs has 1 bedroom and 1 bathroom
- Heating: forced air
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 | $20.1k | $13.20 |
| − Vacancy | −$1.1k | −$0.73 |
| EGI | $18.9k | $12.47 |
| − OpEx | −$5.7k | −$3.74 |
| NOI | $13.3k | $8.73 |
1,519 SF · lease $13.20/SF/yr · vacancy 5.50% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$189.5K
$165.8K – $221.1K
NOI $13,264 @ 7.0% cap · market cap 6.98%
Second Best
Apartment 5plus
$176.5K
$154.4K – $205.9K
NOI $12,355 @ 7.0% cap · market cap 6.51%
Theoretical Best
Office A
$354.1K
$309.9K – $413.2K
NOI $24,790 @ 7.0% cap · market cap 13.05%
Zoning and permitted uses should be independently verified with local authorities.
Property Analytics
Property Profile
Location Intelligence
Current Use by Public Records
Duplexes
FAQs
What type of property is this?
Duplex - Duplex with a 2-bedroom main-floor unit and a 1-bedroom upstairs unit, suited for owner-occupants or investors.
Where is this duplex located?
The property is located at 521 12TH Avenue Green Bay, WI.
What is the asking price?
The asking price for this property is $189,900.
What are key features of this property?
This property features: West Green Bay duplex built in 1903; Two units: main floor has 2 bedrooms and 1 bathroom; upstairs has 1 bedroom and 1 bathroom; Heating: forced air
