FOR LEASE
Office Spaces
Property ID
US28-1004353
Entity Owned Owner of record is a legal entity (LLC / corporation).
3-yr Hold Held for 3 years.
Absentee Owner Owner mailing address differs from the property address.
~
Est. High Equity Modeled equity is high. Estimate, not a fact.
Entity Owned 
For Lease
1 / 2
Contact for pricing
231 S Frontage Rd, Willowbrook, IL 60527
View Listing
Ownership intelligence
Who controls the opportunity?
Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. Included with a plan.
Owner contacts
Can we reach the decision maker?
Skip-traced phones and e-mails of the owner. Included with a plan.
Debts
What is owed, to whom, and when it comes due
Recorded lenders, amounts and estimated maturities of the owner's loan book — included with a plan.
Property tax · 2023
What does the county charge?
$77k
Tax billed · 2023
Assessed value$1.50M
Assessed land$637k
Assessed improvement$862k
Effective rate5.15%
Value estimate
· Nov 2026$8.58M
$7.72M – $9.43M
AI approach$8.94M
Submarket $/SF estimate$11.08M
NOI build-up
Gross scheduled income$11k
Vacancy & credit loss−$564
Operating expenses−$3k
NOI · 61,266.67% cap applied$7k
Realmo valuation models over county records and 5 qualifying comparable sales.
Recently sold
What actually traded nearby?
$239/SF
ZIP average, outlier-cleaned · 29 recorded sales of this use type
Observed band · Q1–Q3$137 – $396
Qualifying comparables5
Cap rate analysis
How does the asset earn?
61,266.67%
$7k estimated NOI · market benchmarks for this use type
Price anchors at 6 / 6.5 / 7% — in the full report.
Zoning insight
What can be built here?
I
This district is intended to provide space for existing and future governmental uses, municipal buildings, parks and recreation areas, no...
General categoryCIVIC_INSTITUTIONAL
JurisdictionDU PAGE
Location intelligence
Which uses thrive at this corner?
Best fit: Realty agency
Demand heat for this use is drawn on the map · LocInt grid
Demand index
Realty agency24.5
Restaurant18.8
Dental Office14.0
Demand index: how under-served this business type is around this point — modeled from the LocInt grid (area demand vs. what already operates, adjusted by real visit traffic). Higher means stronger unmet demand.
Location
✓ County assessor
✓ Recorded deeds · 5 transfers
✓ 5 qualifying comp sales
✓ Zoning catalog
Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.
Comparables
6 recorded sales · 14 properties nearbyRecent sales nearby
6 recorded sales in this ZIP, last 8 years
Address
Sale price
Sold
Size
Sale prices and dates as our records hold them, one row per building. A deed can cover more of a building than the size shown, so read the price against the size rather than dividing one by the other.
Comparable nearby
6 properties of the same type nearby
Comparable nearby
Similar Nearby for Sale
Similar Nearby for Lease
Value estimation
Instant AI valuation built from comps, income signals, and proprietary benchmarks.A defensible range, not a single guess.
Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
Full NOI build-up · 6 steps
All 5 comparables with addresses
Sensitivity value band
Source audit · 6 inputs
PDF export
Professional plan · 30 reports
from $199/month
from $199/month
Summary
1
Valuation conclusion
Included free
Estimated market value
$8.58M
Value range
$7.72M – $9.43M
±10% around blend
Estimated value / SF
$106 / SF
Confidence
High
5 county-verified comps
Property data
100
Market benchmarks
100
Comparable sales
50
Income certainty
100
$7.72M
blend $8.58M
$9.43M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
- GBA
- 80,661 SF
- Lot area
- 5.24 ac
- Year built
- 1981
- Stories
- 3
- APN
- 09-35-203-001
- Zoning
- I
- Assessed value · 2023
- $1,499,850
- Annual tax · 2023
- $77,257
3
Income approach: direct capitalization
Partial preview
Estimated Stabilized NOI, derived from market rent, vacancy and expense benchmarks. Actual property income not reported.
- Estimated market rent / SF
- Potential gross income
- Vacancy allowance
- Effective gross income
- Benchmark operating expenses
- Stabilized NOI
- Property tax · 2023
- $77,257
- Selected cap rate
4
Comparable sales
Partial preview
Comparables picked and weighted for this valuation. The Overview tab lists recorded sales nearby as our records hold them, unweighted and unselected, so the two do not have to agree.
Sales approach indication
$4.38M
Weighted, 5 comps · high confidence
Evidence
5 found · 5 selected
County-verified recorded sales
Comparable
Sale date
Sale price
$ / SF
6.9 mi away · 90,072 SF
7.5 mi away · 73,041 SF
8.0 mi away · 96,469 SF
8.2 mi away · 58,816 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$8.58M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)
Average
Subject delta
ZIP 29 sales
$239
-56%
Submarket 41 sales
$216
-51%
County 712 sales
$205
-48%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $106/SF.
Delta below average reads as headroom.
Source: Realmo CRE sales derivatives (county records).
7
Methodology
Included free
Building area
County record
Property tax
County record
Assessed value
County record
Zoning designation
County record
Operating expenses
Modeled
Market rent
Market benchmark
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.
How Realmo checks its estimates
Cap rate
Cap rate calculated from real income and expense signals, benchmarked against sales of similar assets nearby.
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable sales, saved work and exports.
9-scenario matrix
Comparable sales · 5
NOI build-up · 9 steps
Market rates by use type
PDF export
Professional plan · 30 reports
from $199/month
from $199/month
Overview
No cap rate is computable for this property yet
No recorded sale, income signal or market-rate row for its use type. Any figures below are a modeled what-if, not an implied cap rate.
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$19.45M
Move the market yield to see immediate price impact.
Value / SF
$241
Vs. selected
Base
Derivation
NOI ÷ cap
Arithmetic over the modeled NOI — not market scenario modeling.
NOI × cap matrix
Preview
Preview of 9 modeled outcomes.
NOI
5.00%7.00%9.00%
$1.23M
$24.50M
$17.50M
$13.61M
$1.36M
$27.22M
$19.45M
$15.12M
$1.50M
$29.95M
$21.39M
$16.64M
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable sales
Partial preview
Qualifying comparables
5 found
High confidence · county-verified
Closest comparable
$2.38M
4.8 mi · Apr 2026 · $35/SF
Automated cap rate analysis. Based on public records, market benchmarks and proprietary
models. Verify with a licensed professional before transacting.
Building & lot
Public records
Property type
Office Spaces
Use group
OFFICE (GENERAL)
Status
For Lease
Year built
1981
Heating
NONE
Stories
3
Total area
80,661 SF
Lot
5.24 ac (228,254 SF)
Zoning code
I
CIVIC_INSTITUTIONAL
APN
09-35-203-001
UPID
US28-1004353
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Property tax & assessments
Tax year 2023
Tax billed
$77,257
Assessed value
$1,499,850
Assessed 2023
Previous assessed
$1,516,330
-1.1% YoY
Effective rate
5.15%
On assessed value
Assessed land
$637,460
Assessed improvement
$862,390
Land market value
$1,912,380
Improvement market value
$2,587,170
Total market value
$4,499,550
Applied tax rate
9,257.0000
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
Matched to the official district catalog
Jurisdiction
Willowbrook, IL
Zoning code
I
Category
CIVIC_INSTITUTIONAL
Codes and permitted uses for this address
Registration is required before the official district profile is shown.
Official district profile
What the municipal code says about I
Zoning description
This district is intended to provide space for existing and future governmental uses, municipal buildings, parks and recreation areas, noncommercial places of assembly, and other institutional uses
General category
CIVIC_INSTITUTIONAL
Ownership Intelligence
Find the owner behind the property.
Unlock the evidence behind ownership: portfolio, transactions, debt and any signals we can model, to help you decide who to contact next.
What opens after registration
Ownership intelligence
Owner identityResolved entity and name variants
Portfolio holdingsLinked properties we can resolve, with estimated value
Deal signalsSell-side activity where we detect it
Debt & historyRecorded loans and transaction history
Included with every plan
See the ownership record for this address.
Registration is required before any owner information is shown.
Every paid plan opens ownership intelligence on every property.
Owner of record and activity signals are derived from public records and modeled classifications.
They do not confirm beneficial ownership or intent to transact.
Owner Contacts
Phones and e-mails of the people behind this property's owner, traced from licensed contact data.
Owner phones and e-mails come with a plan - traced from licensed contact data, with verification and Do-Not-Call flags on every number.
Debts · part of Ownership Intelligence
See what the owner owes, and when it comes due.
The mortgage data comes with a plan: recorded loans of the owner - lender, amount, rate and the estimated maturity - as part of the Ownership Intelligence workspace.
What opens after registration
Ownership intelligence
Recorded loansLender, amount and origination for every instrument
Estimated maturityWhen the debt comes due and the refi window opens
Rates & liensRecorded or estimated rate, junior liens flagged
CollateralWhich holding secures each loan - this property marked
Included with every plan
See the ownership record for this address.
Registration is required before any owner information is shown.
Every paid plan opens ownership intelligence on every property.
Owner of record and activity signals are derived from public records and modeled classifications.
They do not confirm beneficial ownership or intent to transact.
Research This Page with AI
Rey answers here. ChatGPT, Grok and Claude get the same data packet.
Includes: Price & PSF · Cap rate · Location · Zoning
Ask Rey →
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Claude
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Still being built. It lands here next, beside the two above.
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