60/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 3,407 Google reviews, the most in Sunnyvale.
- 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
Best Insulation Contractors in Sunnyvale, CA (2026)
80 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Sunnyvale: Service Champions, CR Score 60/100; 4.9★ from 3,407 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Los Gatos Top Insulation, posts 24/7 hours; ranked #2 of 80.
- 33
Most-reviewed: Service Champions, 2,337 Google reviews at 4.8★, the most of 80 ranked after Service Champions; ranked #33.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
80 Sunnyvale insulation contractors are ranked here by CR Score, from ten published factors. 29 are open 24/7, 57 open Saturdays and 54 open Sundays, based on posted hours. The median Google rating is 5.0★ across 80 rated businesses.
Top 10 insulation contractors in Sunnyvale at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Service Champions | 60 | 4.9★ (3,407) | San Jose, 8 mi away | 24/7 | Overall |
| 2 | Los Gatos Top Insulation | 60 | 4.9★ (86) | Los Gatos, 11 mi away | 24/7 | Emergencies |
| 3 | Attic Elite | 59 | 4.9★ (474) | Newark, 12 mi away | Sun | — |
| 4 | Attic Pros | 59 | 4.7★ (104) | San Jose, 12 mi away | 24/7 | — |
| 5 | Delta Spray Foam Insulation | 59 | 5.0★ (34) | Mountain View, 3 mi away | Sat · Sun · Evenings | — |
| 6 | Attic Star | 59 | 4.9★ (156) | Redwood City, 12 mi away | Sat · Sun · Evenings | — |
| 7 | TRIO Heating, Air & Plumbing | 58 | 4.9★ (1,142) | San Jose, 7 mi away | 24/7 | — |
| 8 | 911 Attic Insulation | 58 | 5.0★ (19) | Fremont, 8 mi away | 24/7 | — |
| 9 | Reactic Restoration | 58 | 5.0★ (16) | Palo Alto, 7 mi away | 24/7 | — |
| 10 | Trap Guard | 58 | 5.0★ (13) | Redwood Shores, 8 mi away | 24/7 | — |
The 80 best insulation contractors in Sunnyvale, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Los Gatos, 11 mi away
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 86 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 86 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 15 Montebello Way, Los Gatos, CA 95030
#3 Attic Elite
Based in Newark, 12 mi away
59/100CR ScoreRanked #3 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
#4 Attic Pros
Based in San Jose, 12 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.7★ from 104 Google reviews, listed on Google as “Insulation contractor”.
- 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
Based in Mountain View, 3 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 34 Google reviews
- Hours
- Mon–Sun 9 AM–9 PM
- Address
- 472 Castro St, Mountain View, CA 94041
#6 Attic Star
Based in Redwood City, 12 mi away
59/100CR ScoreRanked #6 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
Based in San Jose, 7 mi away
58/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 1,142 Google reviews.
- 4.9★ from 1,142 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1310 N 4th St, San Jose, CA 95112
Based in Fremont, 8 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Palo Alto, 7 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 16 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 407 California Ave Unit 10, Palo Alto, CA 94306
#10 Trap Guard
Based in Redwood Shores, 8 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 13 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in San Jose, 8 mi away
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.6★ from 14 Google reviews, listed on Google as “Insulation contractor”.
- 4.6★ from 14 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1530 Southwest Expy Suite 221, San Jose, CA 95126
#12 Attic Bros, Inc.
Based in San Jose, 7 mi away
57/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 266 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 266 Google reviews
- Hours
- Mon 8 AM–6 PM · Tue–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 1942 O'Toole Way, San Jose, CA 95131
Based in Santa Clara, 5 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 14 Google reviews
- Hours
- Mon–Sun 9 AM–7 PM
- Address
- 3284 Edward Ave unit a, Santa Clara, CA 95054
Based in Fremont, 11 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 44240 Fremont Blvd Suite 16, Fremont, CA 94538
#15 Everlast Attic
Based in San Jose, 9 mi away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
- 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
#16 AttiCity
Based in Redwood Shores, 4 mi away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 67 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 67 Google reviews
- Hours
- Mon–Fri 9 AM–6:30 PM · Sat–Sun closed
Based in San Jose, 8 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Insulation contractor”.
- 4.6★ from 7 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 763 Mabury Rd # 30, San Jose, CA 95133
Based in Redwood Shores, 6 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 11 Google reviews
- Hours
- Mon–Sun 7 AM–7:30 PM
Based in Fremont, 11 mi away
56/100CR ScoreRanked #19 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
Based in Hayward, 22 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 48 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1340 A St, Hayward, CA 94541
Based in Canoga Park, 11 mi away
56/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 7 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#22 Attic Team
Based in San Jose, 6 mi away
56/100CR ScoreRanked #22 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
Based in Santa Clara, 5 mi away
56/100CR ScoreRanked #23 because of its Google rating and review volume: 4.8★ from 570 Google reviews.
- 4.8★ from 570 Google reviews
- Hours
- Mon–Sun 7 AM–9 PM
- Address
- 3678 Bassett St, Santa Clara, CA 95054
Based in Fremont, 15 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 31 Google reviews
- Hours
- Mon–Sun 9 AM–9 PM
- Address
- 37364 Niles Blvd, Fremont, CA 94536
Based in Saratoga, 6 mi away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 8 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
- Address
- 12900 Saratoga Ave #B5, Saratoga, CA 95070
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 80 ranked insulation contractors here; the rest are on their profiles.
Also serving Sunnyvale
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.
| Business | Google rating | Distance |
|---|---|---|
| Attic Bros of Milpitas | 5.0★ (2) | 9 mi |
| Attic Insulation Remove & Install | 1.0★ (1) | 10 mi |
| Attic Total Cleaning & Proofing | 5.0★ (1) | 12 mi |
| Attic Wise Cleaning | 5.0★ (2) | 10 mi |
| Atticali of Sunnyvale | 5.0★ (1) | 2 mi |
| Bear Insulation and Services | 5.0★ (2) | 5 mi |
| Certified Pro Restorations, INC | 5.0★ (1) | 8 mi |
| Equinox Roofing Solutions | 5.0★ (1) | 6 mi |
| Home Pro Roofing and Solar | 5.0★ (32) | In Sunnyvale |
| Insulation & Air Duct Crew | 5.0★ (2) | 20 mi |
| Intek Сonstruction | In Sunnyvale | |
| Lifetime Roofing & Renovation, Inc. | 4.8★ (143) | In Sunnyvale |
| My Steam Rug & Sofa Cleaning | 5.0★ (2) | 10 mi |
| PRO ATTIC RESTORATION | 5.0★ (2) | 21 mi |
| San Mateo Attic Insulation Now | 5.0★ (1) | 12 mi |
| Santa Clara A+ Insulation Service | 5.0★ (2) | 8 mi |
| Signature Home Insulation and Rodent Control | 5.0★ (1) | 10 mi |
| Silicon Thermal | 4.0★ (1) | 3 mi |
| Silicon Valley Attic Cleaning | 5.0★ (1) | 10 mi |
| Silver Peak Construction Group Inc. | 5.0★ (2) | 7 mi |
How much do insulation contractors cost in Sunnyvale?
National price ranges in USD, not adjusted for Sunnyvale. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
How we ranked Sunnyvale insulation contractors
We scored 80 Sunnyvale insulation contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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.
| Factor | Weight | Computed from | In Sunnyvale data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Insulation contractors in Sunnyvale: frequently asked questions
Who is the best insulation contractor in Sunnyvale?
By CR Score, the highest-ranked insulation contractor in Sunnyvale, CA is Service Champions with a CR Score of 60/100. It has 4.9★ from 3,407 Google reviews. It is open 24/7. Los Gatos Top Insulation (#2) and Attic Elite (#3) follow. We ranked 80 insulation contractors on ten factors, last updated October 22, 2026.
How many insulation contractors are there in Sunnyvale?
ContractorsRanked ranks 80 insulation contractors serving Sunnyvale, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in Sunnyvale are open 24/7?
29 ranked insulation contractors in Sunnyvale post 24/7 hours. The highest-ranked are Service Champions (#1), Los Gatos Top Insulation (#2) and Attic Pros (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in Sunnyvale work on weekends?
57 of 80 ranked insulation contractors post Saturday hours and 54 post Sunday hours. The highest-ranked open Saturdays are Service Champions (#1), Los Gatos Top Insulation (#2) and Attic Pros (#4). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Sunnyvale?
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 Sunnyvale. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Sunnyvale insulation contractors have?
The median Google rating among 80 rated insulation contractors in Sunnyvale is 5.0★, with a median of 21 reviews. Service Champions has the most, 3,407 reviews, and ranks #1. 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 ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside Sunnyvale count in this ranking?
Yes, if they are within 25 mi of the Sunnyvale 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 Sunnyvale
- October 2026: CR Scores recalculated for 80 insulation contractors serving Sunnyvale.
More insulation contractors and Sunnyvale pages
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