Home Additions & Dormers in Islip, NY
You need more room and moving is worse than building. Khella has built in Suffolk County since 2006 and files Islip work with Town of Islip Building Division. About thirty-five minutes east.
Adding on in Islip
Rear additions and second storeys on post-war housing. Coverage and setback maths first, drawings second.
Shed and full dormers, second storeys, rear extensions and in-law suites, engineered to carry properly on the house you already have.
We survey the existing framing and foundation before drawing anything, so nobody promises you a bedroom the house cannot carry.
- Permit filed with Town of Islip Building Division, and jurisdiction confirmed before drawings
- Structural survey of the existing framing and foundation before design
- Shed dormers, full dormers and full second-storey additions
- Rear and side extensions, in-law and accessory apartments
- Steel and LVL beam work where the span calls for it
- Roof, siding and window matching so the addition does not announce itself
- Phasing that keeps the house liveable and weather-tight throughout
- Flood map and elevation certificate pulled at estimate stage for Islip parcels
Your existing
house is the
first constraint.
An addition is a structural question before it is a design one. What Islip houses were originally built to carry, and what town of Islip Building Division will approve, together decide how much room you actually get.
- What you are adding onto
A mix of older village houses near Main Street, post-war subdivisions, and waterfront properties on the bay side.
- Who reviews the addition
- Town of Islip Building Division
Town of Islip files its own hamlet. Anything touching the bay adds County and, at times, State review.
- What most often forces a redesign
The Town of Islip building department covers an enormous population, so realistic permit timelines here are longer than people expect. We file early and say so.
Islip
questions,
answered.
Can I put a dormer or second storey on my Islip house?
Usually, but the existing structure decides. Rear additions and second storeys on post-war housing. Coverage and setback maths first, drawings second.
Will an addition in Islip need a variance?
The Town of Islip building department covers an enormous population, so realistic permit timelines here are longer than people expect. We file early and say so. We check setbacks and lot coverage against town of Islip Building Division requirements before design, so a variance is a deliberate choice rather than a surprise three months in.
What kind of house am I adding onto?
A mix of older village houses near Main Street, post-war subdivisions, and waterfront properties on the bay side. That original construction determines whether the foundation and framing can carry a second floor, which is the first thing we survey.
Can we stay in the house during the work?
Usually yes. We phase so the house stays weather-tight and liveable, keep the dust contained, and sequence the roof opening around the forecast rather than the calendar.
Does an addition trigger anything else in Islip?
It can. Bay-side parcels are mapped. The area north of Montauk Highway is generally not. In Suffolk, adding a bedroom or bathroom can also trigger a County sanitary upgrade. Both get checked at estimate stage, not at inspection.