Home builders in Commack.
Long Island Homeworks has built dormers, additions, and new homes in a central Suffolk hamlet of large backyard properties where second-story additions are common.
Walk-through in Commack
Frank or Kevin visits personally — East End coverage included.
General Contractor in Commack, Suffolk County
Commack is a central Suffolk hamlet in the Town of Smithtown known for its large lots, strong school district, and a housing stock that skews toward 1960s–1980s split-levels and colonials on half-acre and larger parcels. The combination of generous setbacks and strong resale values makes Commack one of Long Island's most active markets for full second-story additions — converting a 1,500 sq ft ranch or split into a 2,700–3,000 sq ft colonial is a common project scope here. Second-story additions in Commack fall under Town of Smithtown Building Department jurisdiction at 99 West Main Street. Most Commack lots are large enough that side and rear setbacks are not an issue, which simplifies permitting compared to denser Nassau towns. Demand in Commack is also strong for in-law suite additions — the school district draws multi-generational families who need dedicated accessory space. Frank Albanese has completed multiple second-story and dormer projects throughout Commack since 2008, including additions on the Holbrook Road and Veterans Memorial Highway corridor. No travel surcharge from our Hicksville base.
Dormers, additions & custom homes
Dormer Additions
Full shed and Cape-style dormers in Commack. Town permit handled, framed and watertight same day.
Learn moreHome Additions
Second stories, rear builds, primary suites, in-law suites, kitchen extensions in Commack.
Learn moreNew Home Construction
Ground-up custom homes and tear-down rebuilds in Commack. Fixed-price contracts.
Learn moreFrequently Asked Questions About Building in Commack
Do you build second-story additions in Commack, NY?
Yes — Commack is an active area for Long Island Homeworks. We hold Nassau County license H-1609230000 (valid in both Nassau and Suffolk) and have completed full second-story additions and shed dormer conversions on Commack's split-levels and ranches. All Commack permits are filed through the Town of Smithtown Building Department at 99 West Main Street — we manage every permit from drawings through inspection sign-off. No travel surcharge.
How much does a second-story addition cost in Commack, NY?
Full second-story additions on Commack ranches and split-levels typically run $140,000–$210,000 depending on footprint and finish scope. Shed dormer conversions on cape-style homes run $62,000–$92,000 with permits included. In-law suite additions with a separate entrance run $90,000–$155,000. Frank provides a fixed-price written contract at the scoping visit — no changes after you sign.
Do I need a permit for an addition in Commack, NY?
Yes. Commack is in Town of Smithtown Building Department jurisdiction. All structural additions require a building permit. Lisa, our permit coordinator, prepares all drawings and manages filings at 99 West Main Street in Smithtown. Typical turnaround is 4–8 weeks.
How long does a Commack home addition take?
Design and Town of Smithtown permitting takes 8–14 weeks. A full second-story addition on a Commack ranch runs 4–6 months from permit issuance. A dormer conversion runs 6–9 weeks once permitted. We provide a Gantt chart at the scoping visit with every milestone date.
What general contractors serve Commack, NY?
Long Island Homeworks serves all of Commack and the surrounding Smithtown Town communities — Kings Park, Hauppauge, Nesconset, and St. James. Our Hicksville shop is about 20 minutes from most Commack addresses. Nassau license H-1609230000, 618 projects since 2008, 4.9-star Google rating.
Ready to build in Commack?
Free on-site consultation. Permits handled. East End coverage for new construction.
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