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Unit pricing

Home Addition cost per square foot in Staten Island

Home Addition cost per square foot in Staten Island, New York in 2026.

Low

$58,500

Average

$110,500

High

$182,000

Staten Island crews quote about $195 – $585 per square foot.

Multiply local unit rates by your real measurements.

What drives home addition prices in Staten Island

Local labor, permitting and climate move Staten Island prices away from the national average.

Labor market

Staten Island offers the most suburban-style pricing in the five boroughs.

Permits

DOB permits with coastal-zone review in shoreline areas.

Climate

Storm surge exposure raises requirements near the water.

Staten Island unit pricing by material

Garage conversion$105 – $260
Sunroom$130 – $325
Bump-out$195 – $455
Single-room addition$195 – $520
Second story$260 – $650
In-law suite / ADU$235 – $585

Ways to lower your Staten Island price

  • Build up or bump out rather than adding a new foundation footprint.
  • Keep plumbing on the existing wet wall — moving water and waste lines is the costliest change.
  • Convert existing space (garage, attic, basement) at half the per-square-foot cost.
  • Keep the roofline simple; complex tie-ins add framing labor and leak risk.
  • Lock the design before demolition — change orders during construction carry the biggest premiums.

Staten Island questions

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