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Longmont Four-Unit Investment Opportunity
For Sale
$750,000

316 21st Ave, Longmont, CO 80501

Four spacious units with in-unit laundry and attached garages.

Property Size3,689 SF
Days on Market195

Property Features for 316 21st Ave

General Information

Standard status Active
Size 3,689 SF
Property subtype Multifamily
Occupancy 95%

Amenities

Four spacious 2-bed units with garages and in-unit laundry; below-market rents create strong potential for income growth and higher returns for investors.
Close to Horizon Park retail hub and major employers like Seagate and UCHealth; Longmont's thriving economy and limited new supply ensure long-term rental demand.
Fee-simple ownership in a stable market with strong rent growth; property offers clear value-add opportunities and attractive projected returns for savvy buyers.

Building Details

Building Size 3,689 SF
Units 4
Listing Agency: Denver Office
Listed By: David J. Bomgaars · License #License(s): CO: FA100104456
Source: Marcusmillichap
Added: Apr 3 Changed: Aug 8 Last Checked: Jul 16 at 11:32AM

Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Denver Office

Investment Insights

Based on property information with market context.

The property at 316 21st Ave in Longmont, CO, presents a four-unit investment opportunity. It features four spacious 2-bedroom units, each equipped with in-unit washer and dryer and attached garages. The property is suitable for an owner-user or an investor seeking a long-term, value-add asset. Garage parking and below-market rents offer avenues for income growth. The location is near Horizon Park, a retail center anchored by King Soopers, with co-tenants such as Dollar Tree, Planet Fitness, and Big Lots, benefiting from local consumer traffic and convenience. Longmont’s labor market is supported by expanding sectors such as retail, advanced manufacturing, and professional services, and major employers including Seagate and UC Health, strengthening the property’s investment profile.

Key Highlights

  • Four spacious 2‑bedroom units, each with in‑unit washer and dryer.
  • Attached garages** for each unit.
  • Value‑add opportunity with below‑market rents.

Financial Insights

Estimated NOI and Cap Rate

NOI / Yr
$68,957
Cap Rate
9.19%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,379,140 $1.4M
Cap Rate 7%
$985,100 $985.1K
Cap Rate 9%
$766,189 $766.2K
Market Conditions
NOI Build-Up for 3,689 SF
Gross rent
$105.4K $28.56/SF
− Vacancy
−$6.8K −$1.86/SF
EGI
$98.5K $26.70/SF
− OpEx
−$29.6K −$8.01/SF
NOI
$69.0K $18.69/SF
Area
Boulder County, CO
Vacancy
6.50%
Lease Rate
$28.56 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,379,140
Cap Rate 7%
$985,100
Cap Rate 9%
$766,189

Alternative Uses

Best Use
Multifamily LT 5
$985.1K
$862.0K – $1.15M (±1% cap)
NOI $68,957 @ 7.0% cap · market cap 9.19%
Second Best
Apartment 5plus
$917.4K
$802.7K – $1.07M (±1% cap)
NOI $64,219 @ 7.0% cap · market cap 8.56%
Theoretical Best
Office A
$1.11M
$973.9K – $1.30M (±1% cap)
NOI $77,912 @ 7.0% cap · market cap 10.39%
Zoning and permitted uses should be independently verified with authorities. How Realmo checks its estimates

Property Analytics

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Current Use

Quadplexes

Suggested Use

Top Pick Law Firm Parking Lot & Garage Hair Salon Cafe & Coffee Shop (Bike/Boat/Book/etc) Store Skin Care Clinic

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

Location Intelligence

Trade Area within ½ mile

897
Businesses Nearby

Demographics for 80501, CO

42,822
Population
19,173
Households
2.2
Avg Household Size
38
Median Age
39%
College-Educated
89%
High-School Grad
12.6 sq mi
ZIP Area
3,399
Density / Sq Mi
$77,705
Median Household Income
$42,599
Median Earnings
$1,586
Median Rent
$461,400
Median Home Value
Check the figures for this property Cap Rate, Value Estimation, Potential NOI and more
View Realmo Analytics

Market

Vacancy Rate% for Multifamily in West region

7% 2022
7.8% 2023
8.6% 2024
8.6% 2025
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Frequently Asked Questions

What type of property is this?
Quadplex - Four spacious units with in-unit laundry and attached garages.
Where is this quadplex located?
The property is located at 316 21st Ave Longmont, CO.
What is the asking price?
The asking price for this property is $750,000.
What are key features of this property?
This property features: Four spacious 2‑bedroom units, each with **in‑unit washer and dryer**.; Attached garages** for each unit.; Value‑add opportunity with below‑market rents.
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