Cost to Build a Custom Home on Long Island (2026)
The cost to build a custom home on Long Island: our new homes start from $1.5M, typically $400-500 per square foot, all-in. See what moves your number.
Straight answers on building, renovating and reimagining Gold Coast homes, from the team behind 100+ custom projects.

The cost to build a custom home on Long Island: our new homes start from $1.5M, typically $400-500 per square foot, all-in. See what moves your number.

The Long Island custom-home permit and approvals process, from building permits and variances to wetlands and site plans, and why it's the slowest phase.

What separates high-end residential construction from standard building on Long Island's Gold Coast, from materials and systems to craftsmanship and cost.

New construction homes on Long Island: why families build instead of buy on the Gold Coast, the process, and what to know before you break ground.

Here's the basic guide about the construction process of custom home building. It will help you understand what steps a custom home builder will take.