Looking for a crawl space contractor in Islandia, NY? Describe your project once and up to five crawl space contractors who work in Islandia and Suffolk County get back to you with a quote. It's free and there is no obligation.
Islandia is home to about 3,651 people (2024 Census Bureau estimate), a growing community (+2.3% since 2020). With 1,649 people per sq mi, it is a suburban area. Humid summers and homes built over vented crawl spaces make moisture problems common here.
Islandia at a glance
- Population (Census Bureau estimate, 2024)
- 3,651 (+2.3% since 2020)
- Rank in New York
- 206th of 595 cities and towns
- Land area
- 2.2 sq mi
- Population density
- 1,649 people per sq mi (suburban)
- Type
- Village (Islandia village)
- Main county
- Suffolk County
What to check before hiring in Islandia
- Water first: standing water needs drainage before a vapor barrier.
- Wood damage: ask for a moisture reading and an assessment of joists and sills.
- Humidity control: check what dehumidifier or air supply is included and its maintenance.
- Price drivers: footprint, height, debris removal, drainage and repairs.
Useful official resources
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U.S. Department of Energy: Energy Saver
Official information and guidance.
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EPA: mold
Official information and guidance.
Services available in Islandia
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Crawl space encapsulation
Heavy vapor barrier on the floor and walls, sealed vents and a dehumidifier or conditioned air.
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Crawl space drainage and joist repair
Drainage, sump pump, joist or support repairs before or with encapsulation.
Frequently asked questions in Islandia
How much does crawl space encapsulation cost in Islandia, NY?
It depends on the size of the crawl space, its condition and the equipment. Describe it: contractors who serve Islandia reply with a quote.
How long does it take?
Often two to four days for a typical house.
Does it need maintenance?
Yes: the dehumidifier and any sump pump need regular checks.
Which crawl space contractors will contact me?
Up to five independent crawl space contractors who serve Islandia and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.