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Property profile & analytics
FOR SALE
Office buildings
1 Transam Plaza Dr, Oakbrook Terrace, IL 60181
Entity Owned
6-yr Hold
Absentee Owner
Free & Clear
Property ID
US28-1309861
For Sale
$1,099,000
1 Transam Plaza Dr, Oakbrook Terrace, IL 60181
View Listing →
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1985
Total area
4,775 SF
Lot
6.48 ac (282,269 SF)
Zoning code
C
APN
06-21-405-046
UPID
US28-1309861
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
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$722k
Blend (final)
Blend
$700k
Owner & transaction history
NAJAH PROPERTIES LLC
NAJAH PROPERTIES LLC
Zoning & alternative use
C · Oakbrook Terrace, IL
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Medical building
$1.1M
+38.8%
Commercial (general)
$975,000
+26.1%
Retail stores
$895,000
+15.5%
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 Oakbrook Terrace submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Oakbrook Terrace 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%
by Request
6.5%
by Request
7%
by Request
Alternative Use
Use
Estimation
OFFICE BUILDING
$775,000
Current use
MEDICAL BUILDING
$1,075,000
Change: +39% · Conversion: Easy
COMMERCIAL (GENERAL)
$975,000
Change: +26% · Conversion: Easy
RETAIL STORES
$895,000
Change: +15% · Conversion: Moderate
Blend value · Realmo final
$700k
Range $630k – $770k · ±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
$147 / 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
$11,797
Tax year 2023
Assessed value
$149,390
Assessed 2023
Previous assessed
$150,190
-0.5% YoY
Effective rate
7.90%
On assessed value
Assessed land
$14,940
Assessed improvement
$134,450
Land market value
$44,820
Improvement market value
$403,350
Total market value
$448,170
Applied tax rate
6,156.0000
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
For Sale
Year built
1985
Heating
NONE
Total area
4,775 SF
Lot
6.48 ac (282,269 SF)
Zoning code
C
APN
06-21-405-046
UPID
US28-1309861
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Zoning & alternative use
C · Oakbrook Terrace, IL
Zoning C · permitted uses
C · Oakbrook Terrace, IL
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Oakbrook Terrace. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$775,000
MEDICAL BUILDING
Est. value
$1.1M
COMMERCIAL (GENERAL)
Est. value
$975,000
RETAIL STORES
Est. value
$895,000
OFFICE BUILDING Current
MEDICAL BUILDING
COMMERCIAL (GENERAL)
RETAIL STORES
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
1985
Heating
NONE
Lot
6.48 ac
Current owner
From public records · entity-resolved
NAJAH PROPERTIES LLC
Entity
Free & Clear · 0 yrs held
Mailing address
1800 HAMILTON AVE STE #200, SAN JOSE, CA 95125-5635
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
—
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
No recorded transactions
No recorded transactions found for this property.
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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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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