ADU Division — Long Island

Build Your
ADU.

In-law suites, garage conversions, and detached units. New York State ADU grants of up to $125K available. We handle permits, approvals, and the entire build — start to finish.

Reserve Consultation Call (631) 312-7441

40.7712° N · 72.9934° W — SUFFOLK COUNTY

SERVICE: ADU DIVISION — LONG ISLAND

LICENSE: VERIFIED

ADU Division — Long Island

Add a Unit.
Add Rental Income.
Add Value.

An ADU (Accessory Dwelling Unit) is one of the smartest investments you can make on Long Island. It generates rental income, provides housing for family members, and adds significant value to your property.

New York State's ADU Plus One Grant program provides up to $125,000 to eligible homeowners. We're one of the few Suffolk County contractors who help clients navigate the grant application process.

What's Included

Detached ADU construction (new build)
Garage conversion to living space
Basement apartment legalization
In-law suite additions
Full permit filing and approvals
ADU Plus One Grant assistance
Foundation, framing, and roofing
Complete interior finish

Get Free Estimate

Why Choose Alec's

The Alec's
Difference

ADU Grant Specialists

We've helped dozens of Long Island homeowners qualify for New York State's ADU Plus One Grant — up to $125,000 toward construction costs. We guide you through the full application.

Full Permit Management

ADU permits are complex in Suffolk County. We handle every approval — town, county, health department, and utility connections — so you don't have to navigate the bureaucracy alone.

Suffolk County Experts

We know Long Island's ADU laws, setback requirements, and approval processes inside and out. We've built ADUs in 15+ Suffolk County towns and can navigate local requirements efficiently.

Execution Protocol

Our Process

How Every Project Gets Done

PROTOCOL_REV: 2.4.0
ENV: SUFFOLK_ADU

Step 01 // Inspect

Site & Grant Review

PROPERTY_SURVEYDONE

GRANT_ELIGIBILITYCHECKED

SETBACK_REVIEWVERIFIED

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Step 02 // Propose

Design & Permits

DESIGN_PLANSARCHITECTURAL

PERMIT_FILINGHANDLED

GRANT_APPLICATIONASSISTED

APPROVAL_ETA4-8 WKS

Step 03 // Execute

Expert Build

FOUNDATIONNEW

FRAMINGLICENSED

INTERIOR_FINISHFULL

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Common Questions

ADU Construction FAQ

New York State's ADU Plus One Grant provides up to $125,000 to income-eligible homeowners to build or convert an ADU. Suffolk County also has additional programs. We help you identify and apply for all available grants.

Detached ADUs typically cost $150,000–$300,000 depending on size and finishes. Garage conversions can cost $60,000–$120,000. With grants, your net cost can be dramatically reduced.

The permit and approval process typically takes 3–6 months in Suffolk County. Construction takes 3–6 months after approvals. We start the permit process immediately so we can begin building as soon as approvals arrive.

Yes — in most Suffolk County towns, you can legally rent your ADU to non-family members, subject to local zoning rules. Some grants require rental to income-qualified tenants for a period of years.

Most Suffolk County towns require a separate exterior entrance for legal ADUs. We design all of our ADU projects to meet local requirements from the start.

Start Your Project

See If You Qualify
for the $125K Grant

Schedule a free consultation. We'll review your property, check your grant eligibility, and give you a clear picture of what an ADU would cost and return.

CALL DIRECT: (631) 312-7441

Build Your
ADU.