Individually Owned 
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220 Spring St, Herndon, VA 20170
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Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1963
Construction
CONCRETE BLOCKS
Total area
151,058 SF
Lot
6.93 ac (302,052 SF)
Zoning code
O&L I(OFFICE &LIGHT INDUS
APN
017-1-02-0023
UPID
US87-1198946
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Current use
Occupant on record · Public records
-
Title Company
-
Association / Organization
-
Shipping Company Freight Service
-
(Bike/Boat/Book/etc) Store Corporate Office
-
(Bike/Boat/Book/etc) Store Corporate Office
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
$46.93M
Comparable Approach
Comparable
$34.76M
Blend (final)
Blend
$34.42M
Owner & transaction history
since 2020
3 recorded transactions
Zoning & alternative use
O&L I(OFFICE &LIGHT INDUS · Herndon, VA
Top alternative use upside
Neighborhood: shopping center
$55.7M
+31.5%
Industrial (general)
$51.4M
+21.3%
Auto repair, garage
$50.4M
+19.1%
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
Value estimation
Instant AI valuation built from comps, income signals, and proprietary benchmarks. A defensible range, not a single guess.
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Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
All 6 comparables with addresses
5 alternative uses screened
Sensitivity value band
Source audit · 6 inputs
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Summary
1
Valuation conclusion
Included free
Estimated market value
$34.42M
Value range
$30.98M – $37.86M
±10% around blend
Estimated value / SF
$228 / SF
Confidence
High
6 county-verified comps
Property data
100
Market benchmarks
100
Comparable evidence
60
$30.98M
blend $34.42M
$37.86M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
151,058 SF
Lot area
6.93 ac
Year built
1963
Stories
5
APN
017-1-02-0023
Zoning
O&L I(OFFICE &LIGHT INDUS
Assessed value
$25,601,260
Annual tax
$436,117
3
Income approach: direct capitalization
Partial preview
Income approach indication
$46.93M
Direct capitalization · @ 6.5% CAP return
@ 6% CAP return
$50.84M
@ 6.5% CAP return
$46.93M
@ 7% CAP return
$43.58M
4
Sales comparison
Partial preview
Sales approach indication
$16.23M
Weighted, 6 comps · high confidence
Evidence
6 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
14.1 mi away · 151,935 SF
14.9 mi away · 153,941 SF
15.1 mi away · 114,606 SF
18.3 mi away · 195,480 SF
18.6 mi away · 140,244 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$34.42M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
ZIP 66 sales
$280
-19%
Submarket 170 sales
$290
-21%
County 837 sales
$289
-21%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $228/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Alternative use screening
Partial preview
Top alternative use
Neighborhood: Shopping Center
Gross theoretical uplift
+32%
vs current-use indication
Industrial (general)
Auto Repair, Garage
Warehouse, Storage
Office Building · current use
Values shown before conversion costs, entitlement costs, capital expenditures and stabilization risk.
8
Data & methodology
Included free
Building area
County record
Property tax
County record
Assessed value
County record
Zoning designation
County record
Operating expenses
Modeled
Market rent
Not available
Not analyzed due to unavailable source data: actual rent roll, tenant leases, physical condition and capital
requirements are outside a desktop analysis.
Cost Approach excluded: income and sales evidence cover the value conclusion.
Automated valuation analysis, not a licensed appraisal. Figures are derived from public
records and proprietary models. Desktop analysis: no physical inspection, tenant leases or reported
property income. Verify with a licensed appraiser before transacting.
Cap rate
Cap rate calculated from real income and expense signals, benchmarked against sales of similar assets nearby.
17% off on annual
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 6 sales
Market rates by use type
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Overview
No cap rate is computable for this property yet: no recorded sale, income signal or market-rate row for its use type.
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$25.60M
Move the market yield to see immediate price impact.
Value / SF
$169
Vs. selected
Base
Derivation
NOI ÷ cap
Arithmetic over the derived NOI * — not market scenario modeling.
NOI × cap matrix
Preview
Preview of 9 modeled outcomes.
NOI
5.00%7.00%9.00%
$1.61M
$32.26M
$23.04M
$17.92M
$1.79M
$35.84M
$25.60M
$19.91M
$1.97M
$39.43M
$28.16M
$21.90M
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
6 found
High confidence · county-verified
Closest comparable
$20.25M
13.5 mi · Jan 2026 · $150/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$436,117
Tax year 2024
Assessed value
$25,601,260
Assessed 2024
Previous assessed
$27,683,650
-7.5% YoY
Effective rate
1.70%
On assessed value
Assessed land
$3,555,220
Assessed improvement
$22,046,040
Land market value
$3,555,220
Improvement market value
$22,046,040
Total market value
$25,601,260
Automated cap rate analysis. Based on public records, market benchmarks and proprietary
models. Verify with a licensed professional before transacting.
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Office buildings
Use group
OFFICE BUILDING
Status
For Lease
Year built
1963
Construction
CONCRETE BLOCKS
Heating
OTHER
Stories
5
Total area
151,058 SF
Lot
6.93 ac (302,052 SF)
Zoning code
O&L I(OFFICE &LIGHT INDUS
APN
017-1-02-0023
UPID
US87-1198946
Jurisdiction
FAIRFAX
Metro division
WASHINGTON-ARLINGTON-ALEXANDRIA, DC-VA-MD-WV METROPOLITAN DIVISION
Zoning & alternative use
O&L I(OFFICE &LIGHT INDUS · Herndon, VAZoning O&L I(OFFICE &LIGHT INDUS · permitted uses
O&L I(OFFICE &LIGHT INDUS · Herndon, VA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Alternative use value scenarios
Repositioning upside vs current use
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Building & site characteristics
From public records
Year built
1963
Construction
CONCRETE BLOCKS
Heating
OTHER
Stories
5
Lot
6.93 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
County-recorded code
O&L I(OFFICE &LIGHT INDUS
Jurisdiction
Herndon, VA
Recorded code
O&L I(OFFICE &LIGHT INDUS
Ownership Intelligence
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Ownership report
Owner identityResolved entity and name variants
Portfolio holdingsLinked properties and estimated value
Deal signalsSell-side activity worth following
Debt & historyRecorded loans and transaction history
Private report access
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Owner of record and activity signals are derived from public records and modeled classifications.
They do not confirm beneficial ownership or intent to transact.
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