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Property profile & analytics
OFF-MARKET
Estimated value
$550,000
Investment properties
23 Jefferson Ave Naperville, IL 60540-8416
Entity Owned
9-yr Hold
Absentee Owner
~
Est. High Equity
Property ID
US28-5540785
Property profile
Verified
Property type
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Year built
1895
Construction
BRICK
Total area
3,056 SF
Lot
0.08 ac (3,485 SF)
Zoning code
B
APN
07-13-423-015
UPID
US28-5540785
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
-
Naperville Signage Company | Custom Business Signs Physician
-
Cold Stone Creamery Grocery & Convenience Store Specialty Food Shop
-
Catalytic (Bike/Boat/Book/etc) Store Corporate Office
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$335k
CAP Approach
CAP
$590k
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$550k
Owner & transaction history
Jefferson Naperville LLC · 9 yrs held
Jefferson Naperville LLC
since 2017
7 recorded transactions
Zoning & alternative use
B · Naperville, IL
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 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
$335,000
CAP Approach
CAP Return
Estimation
6%
$640,000
6.5%
$590,000
7%
$550,000
Alternative Use
Use
Estimation
COMMERCIAL (GENERAL)
$705,000
Current use
MEDICAL BUILDING
$690,000
Change: -3% · Conversion: Easy
OFFICE BUILDING
$660,000
Change: -7% · Conversion: Easy
Blend value · Realmo final
$550k
Range $495k – $605k · ±10%
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
$180 / 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
$23,090
Tax year 2023
Assessed value
$290,900
Assessed 2023
Previous assessed
$267,920
+8.6% YoY
Effective rate
7.94%
On assessed value
Assessed land
$94,530
Assessed improvement
$196,370
Land market value
$283,590
Improvement market value
$589,110
Total market value
$872,700
Applied tax rate
7,143.0000
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
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Status
Off-Market
Year built
1895
Construction
BRICK
Heating
NONE
Bathrooms
3
Total area
3,056 SF
Lot
0.08 ac (3,485 SF)
Zoning code
B
APN
07-13-423-015
UPID
US28-5540785
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Zoning & alternative use
B · Naperville, IL
Zoning B · permitted uses
B · 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
COMMERCIAL (GENERAL) Current
Est. value
$705,000
MEDICAL BUILDING
Est. value
$690,000
OFFICE BUILDING
Est. value
$660,000
COMMERCIAL (GENERAL) Current
MEDICAL BUILDING
OFFICE BUILDING
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
1895
Construction
BRICK
Heating
NONE
Bathrooms
3
Lot
0.08 ac
Current owner
From public records · entity-resolved
Jefferson Naperville LLC
Entity
Mailing address
984 MONUMENT ST STE #201, PACIFIC PALISADES, CA 90272-3859
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2017
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
8 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
May 30, 2025
—
Jefferson Naperville LLC
—
Deed
related
$6,350,000 · Lakeside Bank
Apr 7, 2023
—
Jefferson Naperville LLC
—
Deed
related
$8,300,000 · Lakeside Bank
Apr 14, 2017
$10,500,000
Jefferson Naperville LLC
Jefferson Capital LLC
Trustees Deed
$4,600,508 · Barclays Bk/plc
Mar 25, 2013
—
Jefferson Capital LLC
Trust 8-11152
Grant Deed
related
—
Feb 20, 2008
$2,500,000
Trust 08-11152
Hci Group LLC
Warranty Deed
related
$1,665,000 · American Chartered Bank
May 31, 2007
—
Hci Group LLC
—
Trustees Deed
related
$500,000 · American Chartered Bank
Aug 27, 2002
$925,000
Hci Group LLC
Bau,joseph W & Julie F
Grant Deed
$740,000 · Mid America Bank Fsb
Jan 17, 2001
$275,000
Joseph W Bau
Firstar Bank NA Trustee
Grant Deed
$275,000 · Cole Taylor 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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