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Brick Residential Income Building
For Sale
$599,900

431 W Union Boulevard, Bethlehem, PA 18018

COMMERCIAL - Bethlehem City, PA

Property Size4,082 SF
Lot Size0.29 Acres
Price / SF$146.96
Days on Market216

Property Features for 431 W Union Boulevard

General Information

Property type Commercial Sale
Property subtype Other
Parking features Off Street, On Street
Directions Corner of Union Blvd and 4th Ave
Subdivision Bethlehem-West
Standard status Active
APN 642739721641 001
Size 4,082 SF
Lot size 0.29 Acres

Taxes and HOA fees

Tax Annual Amount 7623

Utilities

Heating system Natural Gas
Cooling system Wall Unit(s), Central Air

Building Details

Year built 1910
Building materials Brick
Listing Agency: Century 21 Ramos Realty · Century 21 Real Estate
Listed By: Anthony Ramos · License #AB068035
Added: Jan 2 Changed: Aug 5 Last Checked: Aug 6 at 7:06AM
MLS# 769870

Copyright © 2026 Greater Lehigh Valley 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.

Brick commercial-to-residential income building totaling 4,082 square feet on a 0.286-acre lot in North Bethlehem. Built in 1910, the property has been designed with a main level featuring a spacious open area and an upper level layout with multiple rooms and bathrooms. Cooling includes wall unit(s) and central air, and heating is provided by natural gas.

The site includes rear off-street parking plus on-street parking, along with a detached storage building and a garage that has water and electric. There is also a large side lot.

The building is currently under construction, and the stated development concept includes commercial space on the first floor, three one-bedroom apartments on the second floor, and a loft-style apartment on the third floor.

Key Highlights

  • 4,082 sq ft brick building on a 0.286‑acre lot
  • Built in 1910 with natural gas heat
  • Main level open area for commercial use

Financial Insights For Office B

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 $43.1k $10.56
− Vacancy −$3.4k −$0.82
EGI $39.7k $9.74
− OpEx −$9.9k −$2.43
NOI $29.8k $7.30
4,082 SF · lease $10.56/SF/yr · vacancy 7.80% · expense 25.00%

Alternative Uses

Best Use
Office B
$425.8K
$372.6K – $496.8K (±1% cap)
NOI $29,808 @ 7.0% cap · market cap 4.97%
Second Best
Apartment 5plus
$340.7K
$298.1K – $397.4K (±1% cap)
NOI $23,846 @ 7.0% cap · market cap 3.97%
Theoretical Best
Mixed Use
$600.3K
$525.2K – $700.3K (±1% cap)
NOI $42,019 @ 7.0% cap · market cap 7.00%
Zoning and permitted uses should be independently verified with authorities.

Property Analytics

Current Use

Office Units

Suggested Use

Top Pick Pharmacy (Bike/Boat/Book/etc) Store Veterinary Clinic Pet Grooming Service Locksmith Travel Agency

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

Yes
Utilities to site

Location Intelligence

Trade Area within ½ mile

1,674
Businesses Nearby

Demographics for 18018, PA

32,388
Population
14,669
Households
2.2
Avg Household Size
39
Median Age
37%
College-Educated
92%
High-School Grad
5.2 sq mi
ZIP Area
6,228
Density / Sq Mi
$71,968
Median Household Income
$43,471
Median Earnings
$1,261
Median Rent
$224,000
Median Home Value

Market

Vacancy Rate% for Office in Northeast region

13.1% 2019
15.4% 2020
17.6% 2021
19.1% 2022
20.2% 2023
20.9% 2024
19.9% 2025
Rey
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.

Frequently Asked Questions

What type of property is this?
Residential income property - Brick mixed-use building offers a spacious open main level, multi-room second floor, and rear parking with detached storage and garage.
Where is this residential income property located?
The property is located at 431 W Union Boulevard Bethlehem, PA.
What is the asking price?
The asking price for this property is $599,900.
What are key features of this property?
This property features: 4,082 sq ft brick building on a 0.286‑acre lot; Built in 1910 with natural gas heat; Main level open area for commercial use
More about this property
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