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Property profile & analytics
OFF-MARKET
Estimated value
$1,070,000
Investment properties
20 Jefferson Ave Naperville, IL 60540-5309
Entity Owned
2-yr Hold
Absentee Owner
Free & Clear
Property ID
US28-1553560
Property profile
Verified
Property type
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Year built
1890
Construction
BRICK
Total area
3,585 SF
Lot
0.08 ac (3,485 SF)
Zoning code
B
APN
07-13-430-013
UPID
US28-1553560
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
-
The Annex - Naperville Running Company Clothing & Fashion Store
-
BRS & Associates Inc Logistics Company Freight Service
-
Floyd's 99 Barbershop Barber Shop
-
Warrior Independent Insurance Insurance Agency
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$1.02M
CAP Approach
CAP
$690k
Comparable Approach
Comparable
$1.15M
Blend (final)
Blend
$1.07M
Owner & transaction history
Harriet Props LLC · 2 yrs held
Harriet Props LLC
since 2023
Last sale
$1.1M
3 recorded transactions
Zoning & alternative use
B · Naperville, IL
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Retail stores
$1.5M
+78.6%
Auto repair, garage
$1.3M
+52.9%
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
$975,000
ML approach
$1,020,000
CAP Approach
CAP Return
Estimation
6%
$750,000
6.5%
$690,000
7%
$645,000
Alternative Use
Use
Estimation
COMMERCIAL (GENERAL)
$830,000
Current use
RETAIL STORES
$1,480,000
Change: +79% · Conversion: Easy
AUTO REPAIR, GARAGE
$1,270,000
Change: +53% · Conversion: Difficult
MEDICAL BUILDING
$810,000
Change: -3% · Conversion: Easy
OFFICE BUILDING
$775,000
Change: -7% · Conversion: Easy
Blend value · Realmo final
$1.07M
Range $963k – $1.18M · ±10% · vs last sale $1.10M (Dec 4 2023)
Last sale anchor
$1.10M
Dec 4 2023
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
$298 / 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
$27,261
Tax year 2023
Assessed value
$343,450
Assessed 2023
Previous assessed
$330,170
+4.0% YoY
Effective rate
7.94%
On assessed value
Assessed land
$92,740
Assessed improvement
$250,710
Land market value
$278,220
Improvement market value
$752,130
Total market value
$1,030,350
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
1890
Construction
BRICK
Heating
CENTRAL
Cooling
CENTRAL
Bathrooms
2
Total area
3,585 SF
Lot
0.08 ac (3,485 SF)
Zoning code
B
APN
07-13-430-013
UPID
US28-1553560
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
$830,000
RETAIL STORES
Est. value
$1.5M
AUTO REPAIR, GARAGE
Est. value
$1.3M
MEDICAL BUILDING
Est. value
$810,000
OFFICE BUILDING
Est. value
$775,000
COMMERCIAL (GENERAL) Current
RETAIL STORES
AUTO REPAIR, GARAGE
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
1890
Construction
BRICK
Heating
CENTRAL
Cooling
Yes
Bathrooms
2
Lot
0.08 ac
Current owner
From public records · entity-resolved
Harriet Props LLC
Entity
Free & Clear · 2 yrs held
Mailing address
328 S BRAINARD ST, NAPERVILLE, IL 60540-5402
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2023
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
3 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Dec 4, 2023
$1,100,000
Harriet Props LLC
Royal Blue Properties LLC
Warranty Deed
—
Oct 3, 2016
—
Royal Blue Properties LLC
Hiltenbrand Mary E Trust
Grant Deed
—
Jul 28, 1999
—
Hiltenbrand Trust
Americn Nat'l Bk&tr Chgo Ttee
Grant Deed
related
—
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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