New York · Inground Pool Builders & Contractors · Updated 2026
30 inground pool builders in the Islip area — fiberglass, gunite and vinyl liner — ordered by customer rating and review count, with 2026 installed prices for each type so you can compare before the first site visit. 23 are listed as specialists for this work; the rest are pool builders that routinely handle it. This page shows the top 20.
Ordered by customer rating and review count across the Islip area. Listings include the available rating, contact details and location; confirm current credentials and scope directly.
Planning a new pool as well? The Islip pool builders directory ranks all 170 builders in the area.
Installed prices in Islip run from $58,500–$91,000 for a mid-size vinyl liner pool to $97,500–$156,000 for a comparable gunite pool, with fiberglass in between at $75,500–$110,500. Decking, fencing and permits stack on top:
| Job | Typical Islip price |
|---|---|
| Vinyl liner pool, installed (about 16×32) | $58,500–$91,000 |
| Fiberglass pool, installed (about 14×30) | $75,500–$110,500 |
| Gunite / concrete pool, installed (about 16×32) | $97,500–$156,000 |
| Attached spa or spillover | $15,500–$45,500 |
| Decking and coping around the pool | $8,000–$26,000 |
| Safety fence and gates | $2,600–$7,800 |
| Permits, engineering, utility locates | $700–$4,600 |
| Typical all-in project with deck and fence | $91,000–$195,000+ |
| Ongoing upkeep (chemicals, power, service) | $1,400–$3,400 / year |
New York pricing is above the national baseline used for these estimates, mainly on labor and permitting. Soil, access for excavation equipment, slope, utility relocation and the finish and feature package move a quote more than the pool's footprint does — compare itemized bids for the same size and type.
Fiberglass, gunite and vinyl bids are not comparable to each other — settle the type (or ask each builder to bid two), then compare like for like.
5 stars from 75 reviews
View Company →Islip market
4.6 average customer rating · 2898 reviews · 30 companies · 23 specialists
See All on the Map →30 inground pool builders in the Islip area. 23 are listed as specialists for this work; the rest are pool builders that routinely handle it. The ranked companies average 4.6 stars across 2,898 customer reviews. PoolPad orders the list with a weighted score that combines customer rating and review count, so a long track record counts for more than a handful of scores.
Frost depth drives construction: plumbing runs deep, shells and decks are engineered for freeze-thaw, and the fall close protects it all. Long Island digs sand (easy) while upstate and the lower Hudson Valley hit rock ledge and glacial till — blasting or hammering shows up in bids. Tight suburban lots make access planning part of the price. Vinyl liner rules on value across upstate and much of Long Island; gunite owns the high end from Westchester to the East End. Automatic safety covers are widespread, salt systems keep growing, and compact heated plunge pools are the new city-adjacent trend.
For statewide rankings, city counts and New York prices, see the New York inground pool builders directory, or check the nearby cities below.
Get at least three itemized bids for the same type and size, visit finished pools that are a few years old, and read the warranty for the shell, the finish and the equipment separately. Ask how the company handles rock, groundwater and access problems once digging starts. New York has no single statewide contractor license — licensing runs by county and city (Nassau, Suffolk, Westchester, and NYC all license home improvement contractors), so verify locally. Statewide, new pools must meet the residential code's barrier requirements and include a pool alarm; towns layer their own fence and setback rules on top.
Installed in Islip, NY, a mid-size vinyl liner pool typically runs $58,500–$91,000, a fiberglass pool $75,500–$110,500 and a gunite pool $97,500–$156,000. With decking, a fence and permits most complete projects land at $91,000–$195,000+. New York pricing is above the national baseline used for these estimates, mainly on labor and permitting; the size, finish, features and site conditions move the number most.
There is no single best type. Fiberglass installs fastest and is the easiest to maintain but comes in fixed shapes; gunite can be any shape with any feature but costs more to build and to resurface later; vinyl liner has the lowest upfront price but needs a new liner every eight to twelve years. Match the type to your budget, your yard, how long you plan to stay and how much maintenance you want.
A fiberglass pool is often swimmable two to six weeks after excavation; a vinyl liner pool four to eight weeks; a gunite pool eight to sixteen weeks because the shell has to cure before tile, coping and the finish go on. Permitting adds two to eight weeks up front, and decking and landscaping follow the pool. Most crews dig in the off-season so the pool is ready when the season opens.
Most residential pools are 3 to 6 feet with a deep end of 6 to 8 feet; diving depths of 8 feet or more need a longer pool and a larger excavation. Fiberglass shells are limited to the manufacturer's molds (commonly 6 to 8 feet), while gunite and vinyl liner pools can be built to almost any profile, including sport pools that are shallow at both ends.
The outdoor season in Islip runs Memorial Day through mid-September — about 4 months unheated. A full professional winterization each fall protects plumbing and equipment through the freeze, and spring openings cluster into the same few weeks. The realistic unheated season is Memorial Day to mid-September — heaters are less a luxury than the price of using what you built. Winters are long and freezing, so a professional close is standard everywhere in the state.
Agape Pools Builder and Renovations Liner Replacement has the highest customer rating on this Islip list at 5 stars across 75 reviews. Gappsi, Inc. has the largest review count (525 reviews at 4.8 stars). PoolPad orders the list with a weighted score that combines customer rating and review count, so a long track record counts for more than a handful of scores.
New York has no single statewide contractor license — licensing runs by county and city (Nassau, Suffolk, Westchester, and NYC all license home improvement contractors), so verify locally. Statewide, new pools must meet the residential code's barrier requirements and include a pool alarm; towns layer their own fence and setback rules on top.
Budget $1,400–$3,400 / year for chemicals, electricity and routine service, more for a heated pool or a weekly cleaning route. Fiberglass and vinyl surfaces use fewer chemicals than plaster; a variable-speed pump and an automatic cover cut running costs the most.
Check inground pool builders in cities near Islip, or open the New York directory for every listed market in the state.
Claim your free PoolPad listing, check the pool types you build, and show Islip homeowners planning a new pool what you install.
