Garage Conversions in Huntington, NY: Permits, Cost, and the $125K Grant

More homeowners search "garage conversion" from Huntington and Huntington Station than from anywhere else on Long Island's North Shore — and Huntington is also the single best town on the Island to actually do one. That's not a coincidence we invented; it's what our own project calls and ad data show, and it's what the town's rules reward.

Here's the complete picture for Huntington homeowners: what the town allows, what a conversion costs, how long it takes, and why the Town of Huntington is one of the few places in New York where the state may pay for most — or all — of the build.

Why Huntington Is the Best Town on Long Island for a Garage Conversion

  • A dedicated Accessory Apartment Bureau. Huntington has been permitting accessory apartments for decades. There's a defined application, inspection, and renewal path — you're not asking the town to improvise.
  • Plus One ADU grant participation. Huntington is one of only seven Suffolk County towns in New York State's Plus One ADU Program: forgivable grants up to $125,000 for creating a legal accessory unit. A typical garage conversion costs $50,000–$100,000 — the grant can cover the entire project. Full grant guide here.
  • A rental market that carries the math. One-bedroom accessory apartments in the Huntington area rent for roughly $1,800–$2,400/month. Even at the below-market rates the grant program requires, the unit produces meaningful income.

What the Town of Huntington Requires

The rules that matter most for a garage conversion in Huntington village, Huntington Station, Melville, or Greenlawn:

  1. Owner-occupancy. You must live on the property — in the main house or the new unit.
  2. One accessory apartment per property, meeting size limits relative to the main dwelling.
  3. Building-code conversion of the space: insulation, ceiling height, egress windows, smoke/CO protection, and its own kitchen and bath.
  4. Parking — replacing the garage spaces you're converting is part of the review.
  5. Certificate of occupancy after final inspections — this is what makes the unit legal, rentable, and countable at appraisal.

We handle the drawings, the bureau filing, and the inspections as part of the job. Most Huntington conversions run 8–12 weeks of construction once approvals are in hand.

What It Costs in Huntington — and What the Grant Changes

A straightforward attached-garage conversion (studio or one-bedroom, full bath, kitchenette, mini-split HVAC) typically lands between $50,000 and $100,000 depending on plumbing runs and finishes. An above-garage build runs $80,000–$150,000. Detailed cost breakdown here.

If you income-qualify for Plus One and rent the unit at the program's affordable rates for the forgiveness period, the state's grant of up to $125,000 can absorb most or all of that. For homeowners planning to house a parent or an adult child anyway, it is close to free money — the "tenant" the program wants can be exactly the situation you were building for.

Program status — verified September 2026

As of September 2026, Huntington is accepting Plus One ADU applications through the Long Island Housing Partnership. Intakes open and close town by town — Brookhaven, Islip and Southold are closed right now — so Huntington being open is worth acting on rather than sitting on.

The $125,000 is a cap, not an amount every applicant receives, and it is awarded as a grant. Huntington's published guidelines cap household income at 100% of Nassau/Suffolk area median income (2023 HUD limits: $109,400 for a one-person household, $156,300 for four) and require that you have owned and lived in the home for at least one year. Applications go on a first-come waitlist and are then re-ranked on priority points, including whether the unit will be affordable at or below 80% AMI and whether it can be permitted without a zoning variance. Municipal code always overrides the program guidelines. Verify your town's status before you budget around a grant: LIHP (631) 435-4710. We also check it for you on the walkthrough — see our Plus One ADU grant page for the eligibility checklist and what the build costs if your town's round is closed.

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Frequently Asked Questions

Is it legal to convert my garage into an apartment in Huntington?+
Yes. The Town of Huntington — including Huntington Station, Melville, Greenlawn, and Cold Spring Harbor — permits accessory apartments through its Accessory Apartment Bureau. The property must be owner-occupied, the unit must meet building code with its own kitchen, bath, and egress, and it needs a certificate of occupancy after final inspection.
Does Huntington qualify for the $125,000 Plus One ADU grant?+
Yes. The Town of Huntington is one of only seven Suffolk County towns participating in New York State's Plus One ADU Program, which offers forgivable grants of up to $125,000 to create a legal accessory unit. A typical garage conversion costs $50,000–$100,000, so the grant can cover the entire build.
How much does a garage conversion cost in Huntington, NY?+
Most attached-garage conversions in Huntington run $50,000 to $100,000 depending on size, plumbing scope, and finishes. Above-garage apartments run $80,000–$150,000. Construction typically takes 8–12 weeks after town approvals.
How much rent can a Huntington accessory apartment generate?+
One-bedroom accessory apartments in the Huntington–Huntington Station area typically rent for $1,800 to $2,400 per month at market rate. Under the Plus One grant's affordable-rent requirement, units still generate roughly $1,200–$1,800 per month.

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Work With Alec's Construction

This guide is written by the crew that does the work. See Alec's ADUs service — accessory apartments, garage conversions and grant paperwork. Licensed and insured on Long Island, one crew start to finish, free walkthrough and a written estimate inside 48 hours.

Booking the cold months now: we also handle Additions & New Construction and Bathroom Remodeling.

We keep a permit office directory for Nassau and Suffolk, checked against each jurisdiction's own site, because we file in these counters constantly.

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