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Home Addition cost per square foot in Long Beach

Home Addition cost per square foot in Long Beach, California in 2026.

Low

$54,900

Average

$103,700

High

$170,800

Long Beach crews quote about $185 – $550 per square foot.

Multiply local unit rates by your real measurements.

What drives home addition prices in Long Beach

Local labor, permitting and climate move Long Beach prices away from the national average.

Labor market

Long Beach pricing tracks greater LA with a small coastal premium.

Permits

City permits required for exterior alterations; coastal zone triggers extra review.

Climate

Salt air shortens the life of untreated metal and paint.

Long Beach unit pricing by material

Garage conversion$98 – $245
Sunroom$120 – $305
Bump-out$185 – $425
Single-room addition$185 – $490
Second story$245 – $610
In-law suite / ADU$220 – $550

Ways to lower your Long Beach 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.

Long Beach questions

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