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Property profile & analytics
OFF-MARKET
Estimated value
$1,935,000
Office buildings
17 Fairfield Ave, Upper Darby, PA 19082
Entity Owned
1-yr Hold
~
Est. High Equity
Property ID
US73-0619973
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1955
Total area
46,267 SF
Lot
0.48 ac (20,837 SF)
APN
16-05-00331-00
UPID
US73-0619973
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
$2.68M
Blend (final)
Blend
$1.94M
Owner & transaction history
100 Constitution Avenue LLC · 1 yrs held
100 Constitution Avenue LLC
since 2025
7 recorded transactions
Zoning & alternative use
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 Upper Darby submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Upper Darby 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
INDUSTRIAL (GENERAL)
$3,220,000
Change: -14% · Conversion: Difficult
COMMERCIAL (GENERAL)
$3,180,000
Change: -15% · Conversion: Easy
Blend value · Realmo final
$1.94M
Range $1.74M – $2.13M · ±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
$42 / 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 2024Property tax & assessments
Tax year 2024
Tax billed
$80,213
Tax year 2024
Assessed value
$1,896,670
Assessed 2024
Previous assessed
$1,896,670
+0.0% YoY
Effective rate
4.23%
On assessed value
Assessed land
$93,800
Assessed improvement
$1,802,870
Total market value
$1,896,670
Applied tax rate
1,614.0000
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
Off-Market
Year built
1955
Heating
NONE
Cooling
CENTRAL
Stories
2
Total area
46,267 SF
Lot
0.48 ac (20,837 SF)
APN
16-05-00331-00
UPID
US73-0619973
Jurisdiction
DELAWARE
Metro division
PHILADELPHIA, PA METROPOLITAN DIVISION
Zoning & alternative use
Zoning · permitted uses
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Alternative use value scenarios
Repositioning upside vs current use
INDUSTRIAL (GENERAL)
Est. value
$3.2M
COMMERCIAL (GENERAL)
Est. value
$3.2M
INDUSTRIAL (GENERAL)
COMMERCIAL (GENERAL)
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
1955
Heating
NONE
Cooling
Yes
Stories
2
Lot
0.48 ac
Current owner
From public records · entity-resolved
100 Constitution Avenue LLC
Entity
Mailing address
PO BOX 320099, ALEXANDRIA, VA 22320-4099
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
10 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Jun 17, 2025
$1,000
100 Constitution Avenue LLC
Sun Life Assurance Company Of Canad
Deed
related
—
Oct 3, 2019
—
Mequity Upper Darby LLC
—
Deed
related
$4,251,488 · Dnb First NA
Jul 5, 2019
$2,000,000
Mequity Upper Darby LLC
100 Constitution Ave LLC
Grant Deed
$2,091,441 · Redcloud Financial LLC
Dec 11, 2017
$1,000
100 Constitution Ave LLC
Sun Life Assurance Co Of Canada
Grant Deed
—
Jun 10, 2013
$550,000
Sun Life Assurance Co Of Canada
Sun Life Assurance Co Of Canada
Quit Claim Deed
related
—
Dec 3, 2010
—
Sun Life Assurance Co Of Canada
Parec Constitution Avenue Asso
Deed In Lieu Of Foreclosure
related
—
May 15, 2000
$1,300,000
Parec Constitution Avenue Assn
First States Partners 333 LP
Grant Deed
$1,900,000 · Wilmington Trust Co Pa
Sep 10, 1999
$323,500
First States Partners 221 LP
First Union National Bank
Grant Deed
related
—
—
—
Mequity Upper Darby LLC
—
Deed Of Trust
related
$4,251,488 · Dnb First NA
—
—
Parec Constitiution Ave Assoc
—
Deed Of Trust
related
$1,925,000 · Sun Life Assurance Co Canada
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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