Fiberglass Insulation Cost in San Francisco, CA

In San Francisco, fiberglass insulation typically runs $0.80–$2.50 per sq ft, with the average homeowner paying around $1.50 per sq ft.

Mixed marine/dry · San Francisco
IECC climate zone 3B
Cooling loads dominate coastal metros — Title 24 pushes R-30 to R-38 attic minimums.
Available in CA
TECH Clean California Heat Pump + Envelope
Local CA program supplements federal 25C — apply through a participating contractor.
Federal · State · Utility
Stack up to $4,300+ in incentives
Federal 25C credit up to $1,200/yr, plus TECH Clean California Heat Pump + Envelope on top
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Sample project estimates

Rough budgeting based on typical San Francisco pricing.

Project sizeLowAverageHigh
800 sq ft$640$1,200$2,000
1,500 sq ft$1,200$2,250$3,750
2,400 sq ft$1,920$3,600$6,000

What affects fiberglass insulation cost in San Francisco

  • Project size and access: larger projects cost more in total but less per unit. Hard access (steep roofs, low crawl space) adds labor.
  • Final R-value or thickness: R-49 attics cost more than R-30, but qualify for higher rebates.
  • Removal of old insulation: contaminated or damaged material needs to come out first.
  • Air sealing scope: bundling air sealing with insulation is cheaper than two separate visits.
  • Local demand: peak winter and summer months in San Francisco can push prices 10–15% higher.

Rebates & tax credits

Most San Francisco homeowners cut their out-of-pocket cost with the federal 25C tax credit (30% of materials, up to $1,200/year) and CA state and utility rebates.

How to get an accurate quote

  1. Submit your project details using the form on this page.
  2. A local San Francisco insulation contractor follows up to schedule a free measurement.
  3. You receive a written quote with final R-value, scope, and price.
  4. Compare 2 quotes side by side before committing.

Related

Compare fiberglass insulation vs. alternatives

Common questions

Short answers about how we match fiberglass insulation cost in San Francisco homeowners with vetted local insulation contractors.

Ready for exact fiberglass insulation pricing in San Francisco?

Get 2 free competitive quotes from local San Francisco contractors — or keep researching before you commit.

Get 2 Free QuotesCall (615) 685-5450