Cost segregation data for Long Island, NY (Garden City + Great Neck + Manhasset) investors
Interquartile range across 50 engine-modeled property scenarios matched to the Long Island, NY (Garden City + Great Neck + Manhasset) investor profile. Year-1 savings shown are the federal benefit (37% + 3.8% NIIT). This state does not conform to federal bonus depreciation, so the state share is not accelerated; it recovers over standard MACRS.
Representative scenarios modeled via Cost Seg Smart's proprietary
engine — IRS ATG-aligned methodology, industry-standard 2026 construction cost data base costs,
calibrated metro multipliers. n=50 fixtures matched to
Long Island, NY (Garden City + Great Neck + Manhasset) investor profile. Not derived from individual
client returns. Methodology v1.0.0, generated
May 2026 (reproducible seed: long-island-ny_v1_2026-05-17).
Year-1 savings shown are the federal benefit only (37% + 3.8% NIIT). This state does not conform to federal §168(k) bonus depreciation, so the state share is deferred over standard MACRS rather than realized in Year 1; the federal benefit is unaffected. Confirm specifics with your CPA.
Tax law current as of May 2026. Federal: OBBBA restored 100% bonus depreciation under §168(k), permanent for property placed in service on or after January 20, 2025 (property placed in service January 1–19, 2025 remains at 40% under the prior phase-down); 2026+ stays 100%. State conformity varies; verify with your CPA.
Nassau County is the dense W-2 wedge between NYC and the Hamptons — Northwell Health HQ (NY’s largest private employer, ~85,000 employees across the system), Goldman Sachs’s Garden City office, NYU Winthrop Hospital, North Shore-LIJ specialty practices, plus thousands of BigLaw partners and finance MDs who choose Manhasset/Garden City/Great Neck over a Manhattan co-op. They face the same federal+state stack as NYC residents — but no NYC city tax — so the combined marginal rate lands at ~51.7%, roughly 2.6 percentage points lower than a city-resident BigLaw partner.
- $179,000 Accelerated Depreciation (typical STR worked example)
- $73,000 Est. Year-1 federal tax savings (37% + 3.8% NIIT; NY portion deferred over MACRS)
- 73x Return on Study Cost
Want a number for your specific situation? Use the calculator — preset with property-type defaults you can adjust to match your basis and bracket.
Who are Long Island cost segregation investors?
Long Island W-2 buyers are heavily concentrated in three industries: healthcare leadership (Northwell, NYU Langone, MSK, Mount Sinai), finance (Goldman Garden City, JPMorgan, Morgan Stanley, Mizuho commuters), and law / professional services (Manhattan BigLaw partners, Big-4 audit partners). Income brackets run $400K–$2M+, frequently with substantial deferred comp or RSU vesting.
The combined marginal-rate stack for a Long Island resident at the top federal bracket:
- Federal: 37%
- Net Investment Income Tax (NIIT): 3.8%
- New York State: 10.9% (top rate, income over $25M; 10.3% over $5M is more typical)
- New York City: 0% (resident outside NYC city limits)
- Combined: ~51.7%
That ~51.7% combined figure is the investor’s marginal tax rate. For Year-1 cash, only the federal portion applies up front: every $1 of accelerated depreciation is worth ~$0.408 in Year-1 cash savings federally (37% + 3.8% NIIT). New York does not conform to federal §168(k) bonus depreciation, so the NY state share is deferred over standard 5/7/15-year MACRS rather than taken in Year 1.
Verify with your CPA — NY state has bracket-dependent rates and AGI thresholds for NIIT, and your specific income mix may land below or above the top bracket.
Why cost seg pays more if you live on Long Island (vs commuting from NJ)
The Long Island vs NJ commuter delta is the interesting comparison. Both populations work in Midtown — but a Hoboken resident pays NJ 10.75% state tax on NY-sourced income (with NJ→NY reciprocity credits offsetting the federal sting), while a Manhasset resident pays NY 10.9%. Roughly a wash on state — but the Long Islander avoids the NJ-side complication of dual-state filings entirely, and the cost-seg math is cleaner.
On a typical $500K–$1M out-of-state STR, the engine reclassifies 24–32% of depreciable basis into 5-, 7-, and 15-year MACRS property — $115K–$200K of Year-1 accelerated depreciation under permanent 100% bonus depreciation (OBBBA §168(k), placed in service after January 19, 2025).
At the federal Year-1 rate (37% + 3.8% NIIT), $179K of accelerated depreciation produces roughly $73K of federal Year-1 tax savings. New York does not conform to federal §168(k) bonus depreciation, so the NY state share of the deduction is deferred over standard 5/7/15-year MACRS rather than taken in Year 1; the federal Year-1 benefit is unaffected. See New York bonus depreciation. Over the full MACRS life, the ~51.7% marginal rate is what the deduction is ultimately worth; a Texas-based investor at the same federal bracket captures the same ~$73K federally but never picks up the deferred NY state share.
The catch is the same as for any high-W-2 NY investor: NIIT applies to passive income, so structuring the STR to qualify as a non-rental trade or business under Reg. §1.469-1T(e)(3)(ii) (the 7-day average-stay test, with material participation) is what unlocks the deduction against active W-2 income.
Where do Long Island investors buy property?
Long Island investors do not typically buy local STR property — Hamptons / North Fork zoning + the year-round-rental economics don’t support an STR-loophole strategy at scale. Instead, Long Island capital flows to out-of-state markets accessible via Newark/LGA/JFK:
- Smoky Mountains (Pigeon Forge, Gatlinburg) — Tennessee 0% state tax, cabin STR market, $400K–$900K typical purchase; family-vacation demand and strong year-round occupancy.
- 30A / Destin, FL — Florida 0% state tax, premium beachfront, $750K–$2M+ purchase prices.
- The Catskills + Hudson Valley — Closest weekend-investor zone (~2 hr drive from Garden City), but local zoning is tightening; underwrite carefully.
- Lake George + Adirondacks (in-state) — In-state vacation rental market; NY conformity quirks apply but the strategy still works.
Worked Example — Long Island
A Northwell attending earning $1.2M (W-2 plus partnership distributions from a specialty practice) buys a 4BR Smoky Mountains cabin for $850K with $25K immediate FF&E refresh. After $185K in land, the $640K adjusted basis includes $80K in 5-year assets (hot tub, theater system, smart-home buildout, decorative lighting, appliances), $24K in 7-year assets (themed bunk rooms, custom furniture), and $75K in 15-year property (asphalt drive, retaining walls, deck, fire pit, fencing).
That’s $179K reclassified into accelerated depreciation in Year 1. At the federal Year-1 rate (37% + 3.8% NIIT), the federal tax savings come to roughly $73,000. The cost segregation study pays for itself ~73x in Year 1 alone. (The NY state share of the deduction is deferred over MACRS, not taken in Year 1; see the note above.)
Who doesn’t qualify for cost segregation in Long Island?
REPS (Real Estate Professional Status under IRC §469(c)(7)) requires 750+ hours and more than 50% of personal services in real estate — structurally impossible for a full-time attending physician or BigLaw partner. The STR exception under Reg. §1.469-1T(e)(3)(ii) (7-day average stay + 100-hour material participation) is the only viable W-2 offset path.
The 100-hour material participation test means the investor must actively manage the property — communicating with guests, coordinating cleanings/repairs, managing the listing. A purely passive property management arrangement disqualifies the deduction from offsetting active W-2 income.
Frequently Asked Questions
How much does a cost segregation study cost in Long Island? For a typical $850,000 Long Island investment property, a Cost Seg Smart study runs $995. Full pricing: $495 (under $300K), $895 ($300K–$700K), $995 ($700K–$1M), $1,295 ($1M–$1.5M), $1,595 ($1.5M–$2M), $1,995 ($2M–$3M), $2,495 ($3M–$4M), $3,995 ($4M–$6M), $5,995 ($6M–$8M), $7,995 ($8M–$10M). Commercial and 5+ unit multifamily studies start at $1,995; 2–4 unit multifamily from $795. All studies delivered in under one hour with the CPA-Ready Guarantee — full refund if your CPA can’t use the report.
How does Long Island’s tax stack compare to NYC vs NJ? Long Island (Nassau/Suffolk) = ~51.7% combined. NYC city resident = ~54.3% combined (adds 3.876% NYC city tax). Hoboken/Jersey City NJ commuter to Manhattan = ~51.55% combined (NJ 10.75% top state). Long Island sits between NYC and NJ, slightly above NJ once you account for filing complexity.
Does Northwell or NYU Langone offer any tax-advantaged retirement that interacts with cost seg? Both offer 403(b) and 457(b) deferrals. The 457(b) is particularly valuable because it stacks separately from the 403(b) limit. Cost seg generates Year-1 depreciation losses that offset W-2 income directly; the 457(b) defers W-2 income to a future year. Combining both is common in high-earner planning — coordinate with your CPA on year-by-year sequencing.
Does New York State conform to federal bonus depreciation? No. New York does not conform to federal §168(k) bonus depreciation. The federal Year-1 deduction is fully available; the New York state share is not accelerated and recovers over standard 5/7/15-year MACRS (deferred, not lost). Confirm specifics with your CPA.
Can I move to FL or TX to escape the NY state tax? Yes — moving to a 0% state (FL, TX, NV, WA, TN, SD, WY) drops the combined rate from ~51.7% to ~40.8%. But changing tax domicile from NY is non-trivial (NY aggressively audits former residents); plan the move with a CPA before assuming the savings.
Learn More About Cost Segregation
- What Is Cost Segregation? — Full explainer of the study + methodology
- STR Tax Exception Explained — The Reg. §1.469-1T(e)(3)(ii) regulatory framework + 7-day rule mechanics
- Cost Segregation Study Cost — Pricing breakdown by property type
- Cost Segregation for STRs — STR-specific cost seg strategy hub
How should Long Island, NY (Garden City + Great Neck + Manhasset) investors choose a cost segregation provider?
For a Long Island, NY (Garden City + Great Neck + Manhasset) investor buying a property in the $850,000 range, the choice of study provider is the single biggest controllable variable in the ROI. The methodology is fixed by IRS Audit Techniques Guide rules (industry-standard construction cost data, MACRS classification, engineering-based component reclassification) — what varies is delivery cost and turnaround time.
Traditional engineering studies often run several thousand dollars and can take several weeks, because they include on-site inspections, sales discovery calls, and scheduling overhead. The IRS Cost Segregation Audit Techniques Guide does not require a physical site visit; it requires engineering-based classification with industry-calibrated cost derivation and component-level documentation.
Modern automated providers (such as Cost Seg Smart) deliver the same IRS ATG–aligned study for $495–$1,595 in under one hour, using satellite imagery, county assessor data, and the same industry-standard construction cost databases. For a Long Island, NY (Garden City + Great Neck + Manhasset) investor at the metro's combined bracket, that cost delta typically exceeds the study cost itself by several times over. The CPA-Ready Guarantee (full refund if the report can't be used by your CPA) plus the 60-day money-back policy makes the decision essentially risk-free on the report itself.
The automated path is best-fit for Long Island, NY (Garden City + Great Neck + Manhasset) investors who: own residential STR property valued under $2M, are comfortable uploading closing docs + property photos online (no in-person visit required), and want the report in time to file the current year's return rather than the next one.
| Property value | Cost Seg Smart | Traditional firm |
|---|---|---|
| <$300K | $495 | Traditional engineering firms typically charge several thousand dollars per study, with a 4–8 week turnaround and an on-site visit. |
| $300K–$700K | $895 | |
| $700K–$1M | $995 | |
| $1M–$1.5M | $1,295 | |
| $1.5M–$2M | $1,595 | |
| $2M–$3M | $1,995 | |
| Commercial (under $1M) | $1,995 |
All Cost Seg Smart studies include the CPA-Ready Guarantee (full refund if your CPA can't use the report) plus a 60-day money-back policy. Reports are delivered in under one hour with no on-site visit required.