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Property profile & analytics
OFF-MARKET
Estimated value
$970,000
Office buildings
121 Washington St Naperville, IL 60540-4558
Entity Owned
4-yr Hold
Absentee Owner
Free & Clear
Property ID
US28-1879618
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1984
Construction
FRAME
Total area
5,109 SF
Lot
0.38 ac (16,553 SF)
Zoning code
R
APN
07-13-404-025
UPID
US28-1879618
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
-
Treasures Electronics & Wireless Store (Bike/Boat/Book/etc) Store
-
Artisan Clinical Associates Counselor
-
Care Clinics of Naperville Inc. Medical Clinic
-
karen malczewski General Contractor
-
Lisa Pisha Marriage Or Relationship Counselor
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
$990k
Comparable Approach
Comparable
$892k
Blend (final)
Blend
$970k
Owner & transaction history
121 Washington LLC · 4 yrs held
121 Washington LLC
since 2022
Last sale
$1.0M
2 recorded transactions
Zoning & alternative use
R · Naperville, IL
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Restaurant
$1.6M
+43.8%
Commercial (general)
$1.2M
+7.0%
Medical building
$1.2M
+4.2%
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 Naperville submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Naperville 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
Method
Estimation
Statistic approach
by Request
ML approach
by Request
CAP Approach
CAP Return
Estimation
6%
$1,075,000
6.5%
$990,000
7%
$920,000
Alternative Use
Use
Estimation
OFFICE BUILDING
$1,105,000
Current use
RESTAURANT
$1,590,000
Change: +44% · Conversion: Moderate
COMMERCIAL (GENERAL)
$1,180,000
Change: +7% · Conversion: Easy
MEDICAL BUILDING
$1,150,000
Change: +4% · Conversion: Easy
INDUSTRIAL (GENERAL)
$1,095,000
Change: -1% · Conversion: Difficult
Blend value · Realmo final
$970k
Range $873k – $1.07M · ±10% · vs last sale $1.00M (Jun 12 2025)
Last sale anchor
$1.00M
Jun 12 2025
Realmo estimate · informational only.
These numbers are calculated by our models from public records and may not reflect actual market value.
Not an appraisal.
Verify with a licensed appraiser before transacting. Realmo accepts no liability for divergence from real-world outcomes.
View the full estimation — every method, every assumption
Confidence drivers & risk notes · Custom comparable set · Free for first 3 / day
Full estimation methodology
Every method · every assumption · confidence drivers
Price per SF
Sale + rent benchmarks
Subject property
$190 / SF
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 2023Property tax & assessments
Tax year 2023
Tax billed
$24,793
Tax year 2023
Assessed value
$382,110
Assessed 2023
Previous assessed
$417,120
-8.4% YoY
Effective rate
6.49%
On assessed value
Assessed land
$224,380
Assessed improvement
$157,730
Land market value
$673,140
Improvement market value
$473,190
Total market value
$1,146,330
Applied tax rate
7,025.0000
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 buildings
Use group
OFFICE BUILDING
Status
Off-Market
Year built
1984
Construction
FRAME
Heating
NONE
Total area
5,109 SF
Lot
0.38 ac (16,553 SF)
Zoning code
R
APN
07-13-404-025
UPID
US28-1879618
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Zoning & alternative use
R · Naperville, IL
Zoning R · permitted uses
R · Naperville, IL
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Naperville. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$1.1M
RESTAURANT
Est. value
$1.6M
COMMERCIAL (GENERAL)
Est. value
$1.2M
MEDICAL BUILDING
Est. value
$1.2M
INDUSTRIAL (GENERAL)
Est. value
$1.1M
OFFICE BUILDING Current
RESTAURANT
COMMERCIAL (GENERAL)
MEDICAL BUILDING
INDUSTRIAL (GENERAL)
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Alternative use deep dive
Conversion cost · permit path · stabilized NOI per option
Building & site characteristics
From public records
Year built
1984
Construction
FRAME
Heating
NONE
Lot
0.38 ac
Current owner
From public records · entity-resolved
121 Washington LLC
Entity
Free & Clear · 4 yrs held
Mailing address
17598 SCOTT RD, HINCKLEY, IL 60520-6125
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2022
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
2 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Feb 22, 2022
—
121 Washington LLC
Stanley F Rocush
Warranty Deed
—
—
—
Stanley F Rocush
—
Deed Of Trust
related
$480,000 · Old Second National Bank
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.
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