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ContractorsRanked

Best Insulation Contractors in San Jose, CA (2026)

73 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in San Jose: Service Champions, CR Score 89/100; 4.9★ from 3,407 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Attic Pros, posts 24/7 hours; ranked #2 of 73.

  3. 14

    Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 73 ranked; ranked #14.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

73 San Jose insulation contractors are ranked here by CR Score, from 8 published factors. 27 are open 24/7, 52 open Saturdays and 49 open Sundays, based on posted hours. The median Google rating is 5.0★ across 73 rated businesses.

Top 10 insulation contractors in San Jose at a glance

Top 10 insulation contractors in San Jose at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Service Champions894.9★ (3,407)San Jose24/7Overall
2Attic Pros894.7★ (104)San Jose24/7Emergencies
3TRIO Heating, Air & Plumbing884.9★ (1,142)San Jose24/7—
4911 Attic Insulation875.0★ (19)Fremont, 4 mi away24/7—
5Los Gatos Top Insulation864.9★ (86)Los Gatos, 10 mi away24/7—
6Attic City San Jose854.6★ (14)San Jose24/7—
7Everlast Attic855.0★ (7)San Jose24/7—
8Los Gatos Roofing854.8★ (291)San Jose24/7—
9Newhaus Roofing & Construction844.9★ (148)San Jose24/7—
10Attic Masters Insulation Services845.0★ (7)Canoga Park, 4 mi away24/7—

The 73 best insulation contractors in San Jose, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in San Jose

    #1 Service Champions

    Based in San Jose

    89/100CR Score

    Ranked #1 because of its Google rating and availability: 4.9★ from 3,407 Google reviews, open 24/7.

    • 4.9★ from 3,407 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2161 Del Franco St, San Jose, CA 95131
    View profile for Service Champions(408) 549-7376

  2. #2 Attic Pros

    Based in San Jose

    89/100CR Score

    Ranked #2 because of its Google rating and availability: 4.7★ from 104 Google reviews, open 24/7.

    • 4.7★ from 104 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3071 Monterey Rd suit b, San Jose, CA 95111
    View profile for Attic Pros(800) 543-0382

  7. #7 Everlast Attic

    Based in San Jose

    85/100CR Score

    Ranked #7 because of its Google rating and availability: 5.0★ from 7 Google reviews, open 24/7.

    • 5.0★ from 7 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1567 Alta Glen Dr suit 2, San Jose, CA 95125
    View profile for Everlast Attic(408) 981-5346

  14. #14 Service Champions

    Based in Livermore, 25 mi away

    83/100CR Score

    Ranked #14 because of its Google rating and review volume: 4.9★ from 4,721 Google reviews, the most Google reviews on this list (4,721).

    • 4.9★ from 4,721 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    207 Boeing Ct, Livermore, CA 94551
    View profile for Service Champions(925) 966-1366

  20. #20 Attic Star

    Based in Redwood City, 20 mi away

    82/100CR Score

    Ranked #20 because of its Google rating and trade focus: 4.9★ from 156 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 156 Google reviews
    Hours
    Mon–Thu 7 AM–7:30 PM · Fri 7 AM–6 PM · Sat–Sun 7 AM–7:30 PM
    Address
    2847 Middlefield Rd, Redwood City, CA 94063
    View profile for Attic Star(800) 444-8180

  21. #21 Attic Elite

    Based in Newark, 16 mi away

    82/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.9★ from 474 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 474 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat closed · Sun 8 AM–6 PM
    Address
    37310 Cedar Blvd Suite H, Newark, CA 94560
    View profile for Attic Elite(888) 805-8848

  22. #22 Attic Repair Guys

    Based in Fremont, 11 mi away

    82/100CR Score

    Ranked #22 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 23 Google reviews
    Hours
    Mon–Sat 8 AM–5 PM · Sun 9 AM–2 PM
    Address
    3051 Quantum Dr #2411, Fremont, CA 94538
    View profile for Attic Repair Guys(415) 737-9844

  23. #23 Trap Guard

    Based in Redwood Shores, 16 mi away

    82/100CR Score

    Ranked #23 because of its Google rating and availability: 5.0★ from 13 Google reviews, open 24/7.

    • 5.0★ from 13 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Trap Guard(669) 302-8041

  24. #24 Attic Team

    Based in San Jose

    81/100CR Score

    Ranked #24 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 27 Google reviews
    Hours
    Mon–Fri 9 AM–6 PM · Sat closed · Sun 11 AM–6 PM
    Address
    2175 The Alameda #209, San Jose, CA 95126
    View profile for Attic Team(408) 750-9546

Insulation contractors ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 73 ranked insulation contractors here; the rest are on their profiles.

insulation contractors in San Jose, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Service Champions814.9★ (1,331)25 mi
27Service Champions814.8★ (2,337)25 mi
28EcoGuard Pest Management814.8★ (570)5 mi
29Attic Bros, Inc.814.9★ (266)In San Jose
30Fremont Insulation Pros815.0★ (6)7 mi
31Regal Insulation Services815.0★ (31)17 mi
32Reactic Restoration815.0★ (12)24 mi
33Eagle Insulation Inc.804.8★ (31)6 mi
34SJ Mold Removal805.0★ (7)In San Jose
35Finest Heating & air804.9★ (87)15 mi
36EM Energy & Air794.9★ (101)4 mi
37Bay Valley Insulation Inc794.0★ (4)12 mi
38Next Edge Insulation795.0★ (3)23 mi
39Attic Solutions - Rodent Proofing & Insulation Services794.8★ (39)24 mi
40Atticguard Pro795.0★ (4)13 mi
41AttiCity785.0★ (67)4 mi
42American Attics785.0★ (89)22 mi
43All State Insulation775.0★ (25)16 mi
44AttiCali Insulation & Rodents Proofing774.9★ (8)11 mi
45Master Maintenance Home Services774.7★ (14)In San Jose
46Attic Bros775.0★ (25)4 mi
47Certified Roofing775.0★ (8)In San Jose
48Clean CrawlSpace Inc775.0★ (15)In San Jose
49Clearway Restoration765.0★ (16)5 mi
50Patriots Restoration765.0★ (6)24 mi

Also serving San Jose

20 more insulation contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked insulation contractors serving San Jose
BusinessGoogle ratingDistance
911 Attic InsulationIn San Jose
Acme Refrigeration IncIn San Jose
Air Sharks4.9★ (198)In San Jose
Alliance Insulation5.0★ (1)In San Jose
Bay Weatherization & InsulationIn San Jose
Caleb Chaney Painting and Roofing4.6★ (8)In San Jose
Central California InsulationIn San Jose
Clarity Construction5.0★ (81)In San Jose
Equinox Roofing Solutions5.0★ (1)In San Jose
Ezekiel's Drywall Services5.0★ (61)In San Jose
HVAC Gurus4.7★ (439)In San Jose
Ideal Attic InsulationIn San Jose
local attic experts5.0★ (5)In San Jose
R E Roofing & Construction Inc.5.0★ (20)In San Jose
San Jose Insulation CreationsIn San Jose
Silver Peak Construction Group Inc.5.0★ (2)In San Jose
Super Green InsulationIn San Jose
Therma Tech Inc4.9★ (207)In San Jose
Titanium Roof Innovations California5.0★ (35)In San Jose
Valley Heating, Cooling, Electrical and Solar4.8★ (231)In San Jose

How much do insulation contractors cost in San Jose?

National price ranges in USD, not adjusted for San Jose. Each row names its basis and the month we checked it.

How much do insulation contractors cost in San Jose?
JobLowTypicalHighBasisChecked
Attic insulation$1,700$2,100$2,500Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national rangeOctober 2026

How we ranked San Jose insulation contractors

We scored 73 San Jose insulation contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn San Jose data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Insulation contractors in San Jose: frequently asked questions

Who is the best insulation contractor in San Jose?

By CR Score, the highest-ranked insulation contractor in San Jose, CA is Service Champions with a CR Score of 89/100. It has 4.9★ from 3,407 Google reviews. It is open 24/7. Attic Pros (#2) and TRIO Heating, Air & Plumbing (#3) follow. We ranked 73 insulation contractors on 8 factors, last updated October 22, 2026.

How many insulation contractors are there in San Jose?

ContractorsRanked ranks 73 insulation contractors serving San Jose, CA. 15 of them are based in San Jose; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which insulation contractors in San Jose are open 24/7?

27 ranked insulation contractors in San Jose post 24/7 hours. The highest-ranked are Service Champions (#1), Attic Pros (#2) and TRIO Heating, Air & Plumbing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which insulation contractors in San Jose work on weekends?

52 of 73 ranked insulation contractors post Saturday hours and 49 post Sunday hours. The highest-ranked open Saturdays are Service Champions (#1), Attic Pros (#2) and TRIO Heating, Air & Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in San Jose?

Attic insulation typically costs $1,700 to $2,500, with $2,100 typical (Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range). This is a national range, not adjusted for San Jose. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do San Jose insulation contractors have?

The median Google rating among 73 rated insulation contractors in San Jose is 5.0★, with a median of 24 reviews. Service Champions has the most, 4,721 reviews, and ranks #14. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank insulation contractors?

Each insulation contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do insulation contractors outside San Jose count in this ranking?

Yes, if they are within 25 mi of the San Jose city center, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Update log for San Jose

  1. October 2026: CR Scores recalculated for 73 insulation contractors serving San Jose.

More insulation contractors and San Jose pages

Other trades in San Jose