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Property profile & analytics
OFF-MARKET
Estimated value
$4,540,000
Office Spaces
215 Diehl Rd Naperville, IL 60563-1278
Individually Owned
Absentee Owner
~
Est. High Equity
Property ID
US28-0100350
Property profile
Verified
Property type
Office Spaces
Use group
OFFICE (GENERAL)
Year built
1989
Total area
169,758 SF
Lot
7.44 ac (324,086 SF)
Zoning code
C
APN
07-01-411-005
UPID
US28-0100350
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
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$6.16M
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$3.82M
Blend (final)
Blend
$4.54M
Owner & transaction history
The Godwin Academy
The Godwin Academy
since 2025
Last sale
$3.5M
7 recorded transactions
Zoning & alternative use
C · 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
$5,765,000
ML approach
$6,155,000
CAP Approach
CAP Return
Estimation
6%
by Request
6.5%
by Request
7%
by Request
Blend value · Realmo final
$4.54M
Range $4.09M – $4.99M · ±10% · vs last sale $3.49M (May 27 2025)
Last sale anchor
$3.49M
May 27 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
$27 / 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
$105,209
Tax year 2023
Assessed value
$1,621,500
Assessed 2023
Previous assessed
$1,681,670
-3.6% YoY
Effective rate
6.49%
On assessed value
Assessed land
$661,450
Assessed improvement
$960,050
Land market value
$1,984,350
Improvement market value
$2,880,150
Total market value
$4,864,500
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 Spaces
Use group
OFFICE (GENERAL)
Status
Off-Market
Year built
1989
Heating
NONE
Total area
169,758 SF
Lot
7.44 ac (324,086 SF)
Zoning code
C
APN
07-01-411-005
UPID
US28-0100350
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Zoning & alternative use
C · Naperville, IL
Zoning C · permitted uses
C · 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.
Building & site characteristics
From public records
Year built
1989
Heating
NONE
Lot
7.44 ac
Current owner
From public records · entity-resolved
The Godwin Academy
Individual
Mailing address
201 S CENTRAL AVE STE #200, SAINT LOUIS, MO 63105-3517
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2025
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
9 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Aug 27, 2025
$3,485,000
The Godwin Academy
Swre LLC
Special Warranty Deed
—
Sep 10, 2021
$4,865,000
Swre LLC
Diehl LLC
Special Warranty Deed
—
Dec 8, 2020
$3,350,000
Diehl LLC
Lsref4 Turtle LLC
Grant Deed
—
Jul 17, 2020
—
Lsref4 Turtle LLC
—
Deed
related
$143,008,381 · Citibank NA
Dec 30, 2016
—
Lsref4 Rebound Ma LLC
—
Loan Modification
related
$811,000,000 · Wells Fargo Bank 2015-lsp (ce)
Jul 9, 2015
—
Lsref4 Turtle LLC
Wells Reit II-215 Diehl Road L
Grant Deed
—
Apr 28, 2005
$24,452,000
Wells Reit II-215 Diehl Rd LLC
Uspif Chicago LLC
Grant Deed
—
—
—
Wells Reit II-215 Diehl Rd LLC
—
Deed Of Trust
related
$21,000,000 · Lasalle National Bank
—
—
Lsref4 Turtle LLC
—
Loan Modification
related
$811,000,000 · Jp Morgan Chase Bk
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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