Home Extensions on Long Island.
Extend out, not up. New foundation, matched roofline, one crew start to finish.
Extension walk-through
We check lot coverage and setbacks for your address before designing anything.
Building out, on a real foundation.
A ground-level extension is the right move when the yard has room and you would rather not disturb the roof. A rear extension off the kitchen, a side extension for a family room, or a bump-out that turns a cramped floor plan into an open one — all of it sits on its own footing and foundation, poured to frost depth and tied into the existing structure.
What governs the size is not your budget, it is the lot: coverage limits and setback distances vary by township and zoning district across Long Island, and they cap how far out you can build. We check your lot against those numbers before design starts, so the plan we draw is the plan that gets approved.
The detail that makes an extension look original rather than bolted on is the roofline — matching the existing pitch and lining up fascia and trim. Work is carried out by our own crews under Nassau HIC #198901, Suffolk HIC #HI-69024 and NYC HIC #2110690-DCA.
Common questions
In practice they overlap, and different contractors use the words differently. We use extension to mean building out at ground level on a new foundation — a rear extension off the kitchen, a side extension for a family room — as distinct from building up with a second story or a dormer. If you want to go up rather than out, see our dormer and addition pages.
That is governed by lot coverage and setback rules, which vary by township and zoning district. Most Long Island districts cap how much of the lot can be built on and set minimum distances to rear and side property lines. We check your lot against those numbers before designing anything.
Yes. A ground-level extension sits on its own footing and foundation, poured to frost depth and tied into the existing structure. That is the main structural difference from building up, and it is why the excavation and concrete phase is the front half of the schedule.
That is the goal, and it is mostly about roofline, siding, window proportion and trim detail. Matching an existing roof pitch and lining up the fascia is what keeps an extension from looking bolted on. Older houses can be harder to match because materials have changed.
Typically 12 to 20 weeks of construction depending on size and finish scope, with permitting ahead of that. Excavation and foundation are weather-dependent, which is the main schedule variable in winter.
Room to build out?
We check lot coverage and setbacks before we draw anything.
Mon–Fri, 7am to 6pm | Saturdays by appointment · Call or text anytime