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Property profile & analytics
OFF-MARKET
Medical Office Space
421 Park Ave, Clarendon Hills, IL 60514-2701
Entity Owned
~
Est. High Equity
Property ID
US28-2635317
Property profile
Verified
Property type
Medical Office Space
Use group
MEDICAL BUILDING
Year built
1961
Total area
2,015 SF
Lot
0.25 ac (10,890 SF)
Zoning code
C
APN
09-10-401-016
UPID
US28-2635317
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
by Request
Blend (final)
Blend
by Request
Owner & transaction history
421 Park Development LLC
421 Park Development LLC
since 2025
7 recorded transactions
Zoning & alternative use
C · Clarendon Hills, 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 Clarendon Hills submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Clarendon Hills 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
CAP Approach
Comparable Approach
Alternative Use
Get a detailed, property-specific estimation — fast and free
Price per SF
Sale + rent benchmarks
Subject property
—
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
$9,060
Tax year 2023
Assessed value
$151,840
Assessed 2023
Previous assessed
$140,590
+8.0% YoY
Effective rate
5.97%
On assessed value
Assessed land
$106,390
Assessed improvement
$45,450
Land market value
$319,170
Improvement market value
$136,350
Total market value
$455,520
Applied tax rate
9,060.0000
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
Similar Nearby for Sale
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
Medical Office Space
Use group
MEDICAL BUILDING
Status
Off-Market
Year built
1961
Heating
NONE
Stories
1
Total area
2,015 SF
Lot
0.25 ac (10,890 SF)
Zoning code
C
APN
09-10-401-016
UPID
US28-2635317
Jurisdiction
DU PAGE
Metro division
CHICAGO-NAPERVILLE-JOLIET, IL METROPOLITAN DIVISION
Zoning & alternative use
C · Clarendon Hills, IL
Zoning C · permitted uses
C · Clarendon Hills, IL
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Clarendon Hills. Always verify with local authorities before improvements.
Building & site characteristics
From public records
Year built
1961
Heating
NONE
Stories
1
Lot
0.25 ac
Current owner
From public records · entity-resolved
421 Park Development LLC
Entity
Mailing address
421 PARK AVE, CLARENDON HILLS, IL 60514-2701
Mailing matches property
Yes
Owner-occupied
Yes
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
11 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Aug 5, 2025
$780,000
421 Park Development LLC
421 Park Ave LLC
Warranty Deed
$5,122,500 · Millennium Bank
Feb 2, 2023
—
421 Park Ave LLC
—
Deed
related
$60,000 · Cornerstone National Bank & Trust Co
Feb 1, 2019
—
421 Park Ave LLC
—
Deed
related
$250,000 · Cornerstone National Bank & Trust Co
Dec 27, 2018
—
421 Park Ave LLC
421 Park Ave LLC
Quit Claim Deed
related
—
Oct 11, 2017
—
421 Park Ave LLC
—
Deed
related
$407,389 · Mb Fin'l Bk
Nov 30, 2007
—
421 Park Avenue LLC
Trust 02-003
Grant Deed
$550,000 · American Chartered Bank
Feb 5, 2002
$450,000
Hinsbrook Bank & Trust Trustee
Hinsdale Hospital
Grant Deed
related
$437,500 · Hinsbrook Bank & Trust
Jul 24, 2000
—
Hinsdale Hospital
Chicago Title Land Tr Co Ttee
Grant Deed
related
—
—
—
421 Park Ave LLC
—
Deed Of Trust
related
$547,000 · American Chartered Bank
—
—
421 Park Ave LLC
—
Loan Modification
related
$407,389 · Mb Fin'l Bk
—
—
421 Park Ave LLC
—
Deed Of Trust
related
$100,000 · American Chartered 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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