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The 10 Best Insulation Contractors in San Francisco (2026)
This list is built from live Google review data and updated for 2026, using an average rating weighted by the number of reviews to surface reliably rated local firms. We focused on businesses categorized on Google as insulation contractors and ranked them by that Bayesian-style score so higher ratings with meaningful review volume rise to the top. San Francisco homeowners and property managers look for contractors who understand local building stock and climate considerations; these Google-backed signals are a practical starting point when you’re comparing options around the Bay Area.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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All Seasons Insulation
All Seasons Insulation ranks first thanks to a perfect 5.0 Google rating combined with 82 reviews, giving it strong weight in our score. That mix of flawless average rating and solid review volume pushes its Bayesian-style score ahead of competitors. Its Pleasant Hill address appears on the Google listing used for the ranking.
The full ranking
USA Spray Me Spray Foam Insulation Contractor
USA Spray Me Spray Foam Insulation Contractor shows a 5.0 Google rating across 76 reviews and is categorized as an Insulation contractor in San Francisco. The combination of a perfect score and substantial review total ranks it near the top.
76 reviews
Vortex Insulation
Vortex Insulation holds a 5.0 rating on Google with 48 reviews and is listed as an Insulation contractor in Hayward. The review count provides additional weight to its perfect average.
48 reviews
Juniper Insulation
Juniper Insulation is recorded as an Insulation contractor with a 5.0 Google rating from 31 reviews and is located in San Francisco. Its listing reflects a perfect average rating with a moderate number of reviews.
31 reviews
Attic Elite
Attic Elite appears as an Insulation contractor with a 4.9 Google rating based on 590 reviews and is located in Newark. Although its average is just below perfect, the very large review total gives it strong standing in our weighted ranking.
590 reviews
Insulation Solutions
13 reviews
The Bay Area Insulation
The Bay Area Insulation holds a 5.0 Google rating with 13 reviews and is categorized as an Insulation contractor in San Mateo. Its listing shows a perfect average rating paired with a modest review count.
13 reviews
Insulation Solutions
11 reviews
Building Efficiency, Inc.
Building Efficiency, Inc. is listed as an Insulation contractor with a 4.9 Google rating from 36 reviews and is based in San Francisco. Its near-perfect score and moderate review total contribute to a strong weighted position.
36 reviews
Noble Insulation
Noble Insulation shows a 4.8 Google rating across 19 reviews and is categorized as an Insulation contractor in Richmond. The rating and review count together determine its place in the Bay Area ranking.
19 reviews
Frequently asked questions
How should I choose an insulation contractor in San Francisco?
Look for contractors with strong, recent reviews and clear Google listings; check that their stated services match your needs. Also verify credentials, ask for references, and confirm they understand local building codes and climate considerations before hiring.
What factors affect the cost of an insulation job?
Cost depends on the type of insulation, the area and accessibility of the space, materials chosen, and labor. Obtain multiple written estimates and make sure each includes materials, labor, and any required permits or inspections.
What should I check before hiring an insulation contractor?
Confirm the contractor’s license and insurance, request a written estimate and timeline, and ask for references or recent project photos. Also clarify warranties, cleanup responsibilities, and any expectations about disruption to your home.
How was this ranking built and updated for 2026?
This list is based on Google review data and uses an average rating weighted by the number of reviews (a Bayesian-style approach) so that high ratings with meaningful review counts rank higher. The dataset was refreshed for 2026 to reflect current Google listings and review totals.