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Property profile & analytics
OFF-MARKET
Estimated value
$2,535,000
Office buildings
521 Grn St Iselin, NJ 08830-2618
Trust Owned
18-yr Hold
Free & Clear
Property ID
US59-0725719
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1989
Total area
12,974 SF
Lot
1.21 ac (52,900 SF)
Zoning code
B-3
APN
25 00385- 01-00002
UPID
US59-0725719
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
Current use
Occupant on record · Public records
-
Windsor Care Medical Clinic
-
Dr. Sapna Nambiar, MD Pediatrician Medical Clinic
-
Winsor Staffing Employment Agency
-
VISHAW SONDHI, CPA, P.C. Tax Preparation
-
Winsor Group Inc Trucking Company
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
$3.26M
Comparable Approach
Comparable
$2.52M
Blend (final)
Blend
$2.54M
Owner & transaction history
Spevack,ronald W Living Trust · 18 yrs held
Spevack,ronald W Living Trust
since 2007
2 recorded transactions
Zoning & alternative use
B-3 · Iselin, NJ
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 Iselin submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Iselin 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%
$3,530,000
6.5%
$3,255,000
7%
$3,025,000
Alternative Use
Use
Estimation
OFFICE BUILDING
$3,550,000
Current use
APARTMENT HOUSE (5+ UNITS)
$3,195,000
Change: -10% · Conversion: Easy
COMMERCIAL (GENERAL)
$2,910,000
Change: -18% · Conversion: Easy
INDUSTRIAL (GENERAL)
$2,890,000
Change: -19% · Conversion: Difficult
Blend value · Realmo final
$2.54M
Range $2.28M – $2.79M · ±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
$195 / 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 2022Property tax & assessments
Tax year 2022
Tax billed
$58,382
Tax year 2022
Assessed value
$508,200
Assessed 2023
Previous assessed
$508,200
+0.0% YoY
Effective rate
11.49%
On assessed value
Assessed land
$175,000
Assessed improvement
$333,200
Land market value
$175,000
Improvement market value
$333,200
Total market value
$508,200
Applied tax rate
25.0000
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
1989
Heating
NONE
Units
1
Total area
12,974 SF
Lot
1.21 ac (52,900 SF)
Zoning code
B-3
APN
25 00385- 01-00002
UPID
US59-0725719
Jurisdiction
MIDDLESEX
Metro division
EDISON, NJ METROPOLITAN DIVISION
Zoning & alternative use
B-3 · Iselin, NJ
Zoning B-3 · permitted uses
B-3 · Iselin, NJ
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Iselin. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$3.6M
APARTMENT HOUSE (5+ UNITS)
Est. value
$3.2M
COMMERCIAL (GENERAL)
Est. value
$2.9M
INDUSTRIAL (GENERAL)
Est. value
$2.9M
OFFICE BUILDING Current
APARTMENT HOUSE (5+ UNITS)
COMMERCIAL (GENERAL)
INDUSTRIAL (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
1989
Heating
NONE
Units
1
Lot
1.21 ac
Current owner
From public records · entity-resolved
Spevack,ronald W Living Trust
Trust
Free & Clear · 18 yrs held
Mailing address
116 CRAIG RD STE #2, MANALAPAN, NJ 07726-3254
Ownership since
2007
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
2 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Oct 30, 2007
—
Spevack,ronald W Living Trust
Spevack,ronald W & Miriam R
Quit Claim Deed
related
—
Nov 1, 1996
$1,300,000
Miriam Spevack
Cohen,edward
Grant Deed
$1,000,000 · First Union National 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.
Try Rey
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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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