Staten Island has quietly become one of the most rewarding places in New York City to own an investment property. Price-to-rent ratios remain healthier than in most of Brooklyn or Manhattan, two-family homes are genuinely abundant, and legal basement apartments, converted garages, and new ADUs are opening cash-flow doors that didn’t exist five years ago. But the single fastest way to lose money on a rental is to eyeball the numbers instead of running them. This is where the Investment Property ROI Calculator earns its keep.

I’m Joseph Ranola, Team Leader of the Bridge & Boro Real Estate Team, and I’ve closed more than $25M in Staten Island real estate — including multi-family buys, value-add flips, and rental conversions in Great Kills, New Dorp, Arden Heights, Eltingville, Tottenville, and Castleton Corners. This guide walks you through the same math I run before I let a client make an offer on any Staten Island investment property in 2026.

The Three ROI Numbers That Actually Matter

Most investor blog posts throw a dozen metrics at you. On Staten Island, three numbers decide whether a deal is a good one:

1. Cap Rate (Unlevered Yield)

Cap rate = Net Operating Income ÷ Purchase Price. It tells you the return on the property as if you paid all cash. In Staten Island’s two-family market, cap rates in 2026 are running between 5.2% and 7.1% depending on neighborhood and condition — higher than Park Slope or Bay Ridge by a meaningful margin. A $750,000 legal two-family grossing $5,400/month with $14,000/yr in taxes, $3,600 in insurance, and realistic maintenance/vacancy reserves typically lands around a 5.8% cap rate.

2. Cash-on-Cash Return (Leveraged Yield)

Cash-on-cash = Annual Pre-Tax Cash Flow ÷ Total Cash Invested (down payment + closing costs + rehab). This is the one that matters to your bank account. With DSCR and investor loans sitting around 7.1% in April 2026, a 25% down purchase on that same Staten Island two-family often prints a cash-on-cash in the 4–8% range — not eye-popping, but the tax shield, principal paydown, and appreciation are where the real money lives.

3. Total Return (All In)

Cash flow + principal paydown + appreciation + tax benefits. This is the number that tells you whether the property beats the S&P. Run this honestly — with realistic 2–3% Staten Island appreciation assumptions, not 8% — and you’ll make better decisions.

The Staten Island Neighborhoods Where Investors Win in 2026

Not every part of the island underwrites the same. Here’s where my team is seeing the best risk-adjusted returns this year:

Great Kills & Eltingville: Classic two-families on 40×100 lots, strong tenant demand from FDNY, NYPD, and Staten Island University Hospital staff. Expect 5.8–6.4% cap rates. (Great Kills & Eltingville market page.)

Arden Heights & Annadale: A sweet spot for BRRRR-style deals. Older ranches and split-levels with basement conversion potential. (Annadale & Arden Heights page.)

Tottenville: End-of-the-line R1 zones, waterfront premiums, and single-family rentals commanding $3,800–$4,500. See our Tottenville neighborhood guide.

St. George & Stapleton: Highest cap rates on the island (6.5–7.1%) but higher management intensity. Best for experienced investors.

Todt Hill & Grymes Hill: Not a rental play — this is a luxury appreciation play. (Todt Hill & Grymes Hill page.)

How to Use the Calculator — Staten Island Example

Let’s walk through a real 2026 Staten Island scenario on the Investment Property ROI Calculator:

• Purchase price: $735,000 (legal two-family in New Dorp, 3BR over 2BR)
• Down payment: 25% = $183,750
• Closing costs: ~$22,000 (NYC Closing Cost Calculator)
• Monthly rent: $3,100 (upper) + $2,300 (lower) = $5,400
• Property taxes: $13,800/yr (Class 1 SI assessment)
• Insurance: $3,400/yr
• Maintenance/CapEx reserve: 8% of rent
• Vacancy reserve: 5%
• Mortgage: $551,250 at 7.1% for 30 years → ~$3,702/mo

Plug those in and the calculator returns roughly a 5.9% cap rate, 5.1% cash-on-cash, and an 11.4% total return once appreciation and principal paydown are included. That’s a solid Staten Island deal in 2026 — and critically, it cash flows from day one.

The ADU Multiplier (Staten Island’s Secret Weapon)

Here’s where Staten Island investors are pulling ahead of Brooklyn investors: ADU conversions. Staten Island’s lot sizes, detached garages, and basements make legal accessory dwelling units achievable in neighborhoods like Oakwood, Huguenot, and Westerleigh. A $110,000 ADU conversion that adds $2,200/mo in rent can push an average deal into a 7%+ cash-on-cash overnight. Run your numbers through the ADU Income Calculator before you buy.

Mistakes I See Staten Island Investors Make

Forgetting the Class 1 tax reassessment. Your taxes are going up when you close. Budget for it.

Underestimating heating costs. Pre-war Staten Island homes with oil or steam heat eat cash flow. Ask for 24 months of utility bills.

Ignoring legal-use certification. Paying two-family prices for an illegal two-family is the most common Staten Island mistake. Always pull the Certificate of Occupancy.

Optimistic rent comps. Use StreetEasy and recently-signed leases — not Zillow’s Rent Zestimate.

Brooklyn vs. Staten Island for Investors

If you’re weighing the two boroughs, read our Staten Island vs. Brooklyn comparison and our companion post, Investment Property ROI in Brooklyn. Short version: Brooklyn wins on appreciation, Staten Island wins on cash flow and cap rate. Which matters more depends on your hold horizon and tax bracket.

Frequently Asked Questions

What’s a good cap rate for a Staten Island investment property in 2026?

5.5%–6.5% is the typical sweet spot for legal two-families in the South Shore. Anything under 5% usually means you’re overpaying; anything over 7% usually comes with location or condition risk.

How much do I need to put down?

For a non-owner-occupied Staten Island two-family, expect 20–25% down on a conventional investor loan or 20% on a DSCR loan. If you’ll live in one unit, you can go FHA at 3.5% down (house-hack strategy).

Does Staten Island appreciate?

Yes — Staten Island has averaged 4.6% annualized price growth over the last five years, outperforming many parts of Brooklyn in 2024–2025. Don’t expect it to continue at that pace, but 2–3% is a reasonable long-term underwriting assumption.