Realmo Analytics
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Property summary
This exceptional waterfront medical office building, located at 320 Main St, Islip, NY, presents a unique investment opportunity. The property boasts a substantial 8,651 square feet of space situated on a 0.2-acre lot (53,667 square feet total). Its prime location offers 274 feet of bulkheading with a convenient boat slip, adding significant value and appeal. Currently generating a substantial gross annual income of $420,000 through a month-to-month tenancy with Stony Brook, which covers all… utilities. The property's strong financial performance is further highlighted by a net income of $296,140. Stony Brook is prepared to sign a new long-term lease, ensuring continued rental income and stability. The property's financial records reflect annual taxes of $71,079, maintenance expenses of $26,306 in 2023, and insurance costs of $26,475 in 2023. Detailed floor plans and a survey are readily available for review. Ample parking is provided, catering to both staff and patients. This is a rare opportunity to acquire a high-income-producing waterfront medical building with a strong tenant in place and the potential for long-term growth. The property's exceptional location and features make it an ideal investment for discerning buyers seeking a stable and lucrative asset.
Ownership intelligence
Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. In the full report.
Owner contacts
Skip-traced phones and e-mails of the owner. Included with the full report.
Debts
Recorded lenders, amounts and estimated maturities of the owner's loan book — in the full report.
Property tax
No data for this sectionNo tax or assessment record is on file for this parcel in the county feed.
Value estimate
· Oct 2026No data for this sectionNo value estimate could be modeled: the record carries too little market input for this parcel.
Recently sold
No data for this sectionNo cleaned sale $/SF benchmark exists for this use type in this ZIP, submarket or county yet.
Cap rate analysis
No income signal is modeled for this parcel yet — the Cap Rates tab runs the workflow.
Zoning insight
No data for this sectionNo zoning code is on file for this parcel. Coverage grows with every catalog release.
Location intelligence
Demand index: how under-served this business type is around this point — modeled from the LocInt grid (area demand vs. what already operates, adjusted by real visit traffic). Higher means stronger unmet demand.
Location
Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.
Comparables
6 recorded sales · 11 properties nearbyComparable nearby
Similar Nearby for Sale
Similar Nearby for Lease
Instant AI valuation built from comps, income signals, and proprietary benchmarks.A defensible range, not a single guess.
from $199/month
- Lot area
- 0.2 ac
- Year built
- 2000
Cap rate calculated from real income and expense signals, benchmarked against sales of similar assets nearby.
from $199/month
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
No zoning code is on file for this parcel. Zoning coverage grows with every catalog release — check back, or open Location Intelligence for use analysis of this corner.
Unlock the evidence behind ownership: portfolio, transactions, debt and any signals we can model, to help you decide who to contact next.
Registration is required before any owner information is shown.
The mortgage data is behind the paid report: recorded loans of the owner - lender, amount, rate and the estimated maturity - as part of the Ownership Intelligence workspace.
Registration is required before any owner information is shown.
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- Signals, scores & lead lists
- 300 owner contacts a month
- 30 full reports a month
- Ownership
- Owner Contacts
- Location Analytics
- Full Property Data
- Historical Records
- Value Estimation
- NOI Potential
- Cap Rate Calculation
- Location Insight
- Alternative use
- Local Zoning Insight
Cancel anytime.
- Signals, scores & lead lists
- 1500 owner contacts a month
- 150 full reports a month
- Ownership
- Owner Contacts
- Location Analytics
- Full Property Data
- Historical Records
- Value Estimation
- NOI Potential
- Cap Rate Calculation
- Location Insight
- Alternative use
- Local Zoning Insight
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Sample leads
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Off Market
3576 W 900TH S, SALT LAKE CITY, UT 84104-4529
Held 24 yrs
3576 W 900TH S, SALT LAKE CITY, UT 84104-4529
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Off Market
8505 S SEPULVEDA BLVD, LOS ANGELES, CA 90045
Held 34 yrs
8505 S SEPULVEDA BLVD, LOS ANGELES, CA 90045
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Off Market
BRAGG BLVD, FAYETTEVILLE, NC 28303
Absentee
BRAGG BLVD, FAYETTEVILLE, NC 28303
-
Off Market
BRAGG BLVD, FAYETTEVILLE, NC 28303
Absentee
BRAGG BLVD, FAYETTEVILLE, NC 28303
Sample leads
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Off Market
8505 S SEPULVEDA BLVD, LOS ANGELES, CA 90045
Loan from 20028.0% rateFirst American Savings Bank
8505 S SEPULVEDA BLVD, LOS ANGELES, CA 90045
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Off Market
FAYETTEVILLE, NC 28303
Loan from 2013New Century Bank
FAYETTEVILLE, NC 28303
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Off Market
4026 BRAGG BLVD, FAYETTEVILLE, NC 28303
Loan from 2013New Century Bank
4026 BRAGG BLVD, FAYETTEVILLE, NC 28303
-
Off Market
BRAGG BLVD, FAYETTEVILLE, NC 28303
Loan from 20049.0% rateNew Century Bank Fayetteville
BRAGG BLVD, FAYETTEVILLE, NC 28303
