New Construction Residential Income
For Sale
$607,515
21126 SOUTHBANK STREET, Potomac Falls, VA 20165
Three-bedroom residence with a balcony, rear-load garage, quartz kitchen, and low-maintenance design.
Property Size1,681 SF
Price / SF$361.40
Days on Market10
Property Features for 21126 SOUTHBANK STREET
General Information
Standard status
Active
Size
1,681 SF
Property subtype
Unit/Flat/Apartment
Additional Details
Multifamily Units
1
Building Details
Building Size
1,681 SF
Year Built
2026
Buildings
1
Listing Agency:
SM Brokerage, LLC
Listed By:
Danielle Dawn Wallace · License #0225237494
(571) 999-7039
Source:
Kerishull
Added: Sep 2
Changed: Sep 9
Last Checked: Sep 10 at 6:23AM
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 SM Brokerage, LLC
Investment Insights
Based on property information with market context.
This 1,681-square-foot residential income property was built in 2026 and features a three-bedroom layout with flexible interior spaces. The main living area combines the kitchen, dining area, and family room in an open arrangement. Kitchen appointments include quartz countertops, extensive cabinetry, designer finishes, and a walk-in pantry. The owner's suite includes two walk-in closets and a bathroom with dual vanities, while two additional bedrooms can accommodate residents, guests, or office use. A private balcony extends the living area outdoors.
The property also includes a rear-load garage and additional driveway parking. New construction and energy-efficient design support a low-maintenance ownership profile. The residence is located within a community offering access to shopping, dining, recreation, entertainment, commuter routes, and everyday services.
The property also includes a rear-load garage and additional driveway parking. New construction and energy-efficient design support a low-maintenance ownership profile. The residence is located within a community offering access to shopping, dining, recreation, entertainment, commuter routes, and everyday services.
Key Highlights
- 1,681‑square‑foot residential income property built in 2026
- Three‑bedroom layout with open kitchen, dining, and family room areas
- Quartz countertops, designer finishes, abundant cabinetry, and walk‑in pantry
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$26,217
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
4.32%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$524,340
$524.3K
Cap Rate 7%
$374,529
$374.5K
Cap Rate 9%
$291,300
$291.3K
Market Conditions
NOI Build-Up for 1,681 SF
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.
Gross rent
$51.0K $30.36/SF
− Vacancy
−$3.4K −$2.00/SF
EGI
$47.7K $28.36/SF
− OpEx
−$21.5K −$12.76/SF
NOI
$26.2K $15.60/SF
Area
Loudoun County, VA
Vacancy
6.60%
Lease Rate
$30.36 /SF/Yr
Expense Ratio
45.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$524,340
Cap Rate 7%
$374,529
Cap Rate 9%
$291,300
Alternative Uses
Best Use
Apartment 5plus
$374.5K
$327.7K – $437.0K
NOI $26,217 @ 7.0% cap · market cap 4.32%
Second Best
—
—
no second resolved use
Theoretical Best
Specialty Retail
$526.8K
$461.0K – $614.6K
NOI $36,877 @ 7.0% cap · market cap 6.07%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Current Use
Lease Details
1
Residential units
Location Intelligence
Trade Area within ½ mile
1,730
Businesses Nearby
Explore this area
Business Placement
Demographics for 20165, VA
33,777
Population
12,283
Households
2.7
Avg Household Size
39
Median Age
67%
College-Educated
97%
High-School Grad
9.8 sq mi
ZIP Area
3,447
Density / Sq Mi
$185,594
Median Household Income
$83,463
Median Earnings
$2,480
Median Rent
$661,300
Median Home Value
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Residential income property - Three-bedroom residence with a balcony, rear-load garage, quartz kitchen, and low-maintenance design.
Where is this residential income property located?
The property is located at 21126 SOUTHBANK STREET Potomac Falls, VA.
What is the asking price?
The asking price for this property is $607,515.
What are key features of this property?
This property features: 1,681‑square‑foot residential income property built in 2026; Three‑bedroom layout with open kitchen, dining, and family room areas; Quartz countertops, designer finishes, abundant cabinetry, and walk‑in pantry
