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Property profile & analytics
OFF-MARKET
Office Spaces
100 Elden St 21 Herndon, VA 20170-4873
Entity Owned
4-yr Hold
Absentee Owner
Free & Clear
Property ID
US87-0829788
Property profile
Verified
Property type
Office Spaces
Use group
CONDOMINIUM OFFICES
Year built
1985
Construction
CONCRETE BLOCKS
Total area
1,059 SF
Zoning code
CO(COMMERCIAL OFFICE)
APN
017-1-11-0021
UPID
US87-0829788
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Implied cap rate, NOI & suggested price
Cap vs submarket · NOI estimate · 3 price anchors
Current use
Occupant on record · Public records
-
Allergy Partners of Herndon-Reston Medical Clinic
-
Ngoc Vu, MD Physician Medical Clinic
-
Srividya Thotakura, PA-C Physician Medical Clinic
-
Reston Herndon Imaging Center Medical Clinic
-
Dr. Susan E. Mannan, MD Pediatrician Medical Clinic
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
by Request
Owner & transaction history
Ryans Properties LLC · 4 yrs held
Ryans Properties LLC
since 2021
Last sale
$260,000
1 recorded transaction
Zoning & alternative use
CO(COMMERCIAL OFFICE) · Herndon, VA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Cap rate
Implied · in-place · derived from last sale + estimated NOI
Implied Cap rate
#1
Implied · in-place · NOI ÷ last sale
In-place · derived from last sale + estimated NOI
Cap rate, NOI & submarket benchmark
Implied cap rate vs Herndon submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Herndon submarket · NOI estimate · typical band, median & reading
Refine your cap rate
8-question underwriting flow
1.
Property current status — Going-In vs Stabilized
2.
Price for denominator — asking / offer / market
3.
Leasing status & lease structure (NNN / Gross)
4.
Tenant risk profile & vacancy assumption
5.
Upload T12 / rent roll / OM (optional)
Refine in 60 seconds, get exact suggested price
T12 upload · Submarket benchmarks · Sensitivity grid
Suggested price · 3 cap rate anchors
Income approach @ 5% / 7% / 9% — aggressive / typical / conservative
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · Implied $/SF per anchor · Sensitivity grid
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · implied $/SF · sensitivity
Value
AI, CAP & Alternative Use estimations · Realmo proprietary blendValue Estimations
Based on Realmo’s proprietary methodology
AI Approach
CAP Approach
Comparable Approach
Alternative Use
Get a detailed, property-specific estimation — fast and free
Price per SF
Sale + rent benchmarks
Subject property
—
Submarket sale & rent benchmarks
Median sale $/SF · Asking & closed rent · Submarket vacancy
Submarket sale & rent benchmarks
Median sale $/SF · asking & closed rent · submarket vacancy
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$4,103
Tax year 2024
Assessed value
$265,810
Assessed 2024
Previous assessed
$265,810
+0.0% YoY
Effective rate
1.54%
On assessed value
Assessed land
$53,160
Assessed improvement
$212,650
Land market value
$53,160
Improvement market value
$212,650
Total market value
$265,810
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
Similar Nearby for Sale
Similar Nearby for Lease
Recent comparable sales
Sale price & price/SF · Sale date & distance · Adjustments & confidence
Recent comparable sales
Sale price & $/SF · sale date & distance · adjustments
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Office Spaces
Use group
CONDOMINIUM OFFICES
Status
Off-Market
Year built
1985
Construction
CONCRETE BLOCKS
Heating
HEAT PUMP
Cooling
YES
Stories
1
Total area
1,059 SF
Zoning code
CO(COMMERCIAL OFFICE)
APN
017-1-11-0021
UPID
US87-0829788
Jurisdiction
FAIRFAX
Metro division
WASHINGTON-ARLINGTON-ALEXANDRIA, DC-VA-MD-WV METROPOLITAN DIVISION
Zoning & alternative use
CO(COMMERCIAL OFFICE) · Herndon, VA
Zoning CO(COMMERCIAL OFFICE) · permitted uses
CO(COMMERCIAL OFFICE) · Herndon, VA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Herndon. Always verify with local authorities before improvements.
Building & site characteristics
From public records
Year built
1985
Construction
CONCRETE BLOCKS
Heating
HEAT PUMP
Cooling
Yes
Stories
1
Current owner
From public records · entity-resolved
Ryans Properties LLC
Entity
Free & Clear · 4 yrs held
Mailing address
4019 VERRET DR, FAIRFAX, VA 22030-6095
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2021
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
1 recorded event · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Sep 14, 2021
$260,000
Ryans Properties LLC
Rohini Wijetilleke
Deed
—
Coming soon
Costs & Benchmarks
Operating expenses, capex projections, utility benchmarks, and submarket comparables — all in one view.
Coming soon
Risks
Flood, climate, environmental, title, and tenant-concentration risk — surfaced with mitigations and source citations.
Try Rey
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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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