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Property profile & analytics
OFF-MARKET
Estimated value
$810,000
Manufacturing properties
340 Marconi Blvd, Copiague, NY 11726-2035
Entity Owned
1-yr Hold
Free & Clear
Property ID
US63-2925720
Property summary
AI-generated overview
This 4,385-square-foot industrial property at 340 Marconi Blvd, Copiague, NY 11726, presents a compelling investment opportunity. Situated on a 6,000-square-foot lot, this single-story, 1951-built building offers versatile space ideal for owner-occupancy or multi-tenant use. The property features two drive-in doors and ample yard parking. The building is currently vacant and ready for immediate occupancy. Recent improvements include a roof replacement within the last two years. Low annual property taxes are approximately $10,554. The asking price is $799,000, translating to $182.21 per square foot. This property is zoned for manufacturing and warehouse use and offers the potential for significant rental income through partial occupancy. The property's location in Suffolk County provides easy access to major transportation routes. This is an excellent opportunity for a business seeking a functional and cost-effective space.
Property profile
Verified
Property type
Manufacturing properties
Use group
MANUFACTURING (LIGHT)
Total area
4,385 SF
Lot
0.14 ac (6,000 SF)
Zoning code
G
APN
0100-177.00-03.00-061.000
UPID
US63-2925720
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
-
Mermaid Industries Inc Landscaping General Contractor
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$930k
CAP Approach
CAP
$960k
Comparable Approach
Comparable
$798k
Blend (final)
Blend
$810k
Owner & transaction history
Three Forty Laborator LLC · 1 yrs held
Three Forty Laborator LLC
since 2025
Last sale
$785,000
3 recorded transactions
Zoning & alternative use
G · Copiague, NY
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Commercial (general)
$1.3M
+24.6%
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 Copiague submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Copiague 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
$930,000
CAP Approach
CAP Return
Estimation
6%
$1,040,000
6.5%
$960,000
7%
$890,000
Alternative Use
Use
Estimation
INDUSTRIAL (GENERAL)
$1,060,000
Current use
COMMERCIAL (GENERAL)
$1,320,000
Change: +25% · Conversion: Difficult
WAREHOUSE, STORAGE
$935,000
Change: -12% · Conversion: Easy
Blend value · Realmo final
$810k
Range $729k – $891k · ±10% · vs last sale $785k (Apr 25 2025)
Last sale anchor
$785k
Apr 25 2025
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
$185 / 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 2020Property tax & assessments
Tax year 2020
Assessed value
$2,910
Assessed 2023
Previous assessed
$2,910
+0.0% YoY
Assessed land
$450
Assessed improvement
$2,460
Land market value
$682
Improvement market value
$3,727
Total market value
$4,409
Applied tax rate
472,005.0000
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
Manufacturing properties
Use group
MANUFACTURING (LIGHT)
Status
Off-Market
Heating
NONE
Total area
4,385 SF
Lot
0.14 ac (6,000 SF)
Zoning code
G
APN
0100-177.00-03.00-061.000
UPID
US63-2925720
Jurisdiction
SUFFOLK
Metro division
NASSAU-SUFFOLK, NY METROPOLITAN DIVISION
Zoning & alternative use
G · Copiague, NY
Zoning G · permitted uses
G · Copiague, NY
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Copiague. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
INDUSTRIAL (GENERAL) Current
Est. value
$1.1M
COMMERCIAL (GENERAL)
Est. value
$1.3M
WAREHOUSE, STORAGE
Est. value
$935,000
INDUSTRIAL (GENERAL) Current
COMMERCIAL (GENERAL)
WAREHOUSE, STORAGE
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
Heating
NONE
Lot
0.14 ac
Current owner
From public records · entity-resolved
Three Forty Laborator LLC
Entity
Free & Clear · 1 yrs held
Mailing address
340 MARCONI BLVD, COPIAGUE, NY 11726-2035
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
3 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Apr 25, 2025
$785,000
Three Forty Laborator LLC
Arthur Sandres
Deed
—
Mar 24, 2025
—
Arthur Sanders
340 Marconi Corp
Quitclaim Deed
related
—
Jul 14, 2020
$300,000
Arthur Sanders
Referee Of Suffolk Cnty|anthony
Foreclosure
—
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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