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Best Insulation Contractors in Union City, CA (2026)

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

The short answer

  1. 1

    Best overall in Union City: Attic Pros, CR Score 91/100; 4.8★ from 1,938 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Pro Attic Restoration, posts 24/7 hours; ranked #2 of 123.

  3. 3

    Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 123 ranked; ranked #3.

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

123 Union City insulation contractors are ranked here by CR Score, from 8 published factors. 41 are open 24/7, 87 open Saturdays and 77 open Sundays, based on posted hours. The median Google rating is 5.0★ across 123 rated businesses.

Top 10 insulation contractors in Union City at a glance

Top 10 insulation contractors in Union City at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Attic Pros914.8★ (1,938)Oakland, 13 mi away24/7Overall
2Pro Attic Restoration874.9★ (48)Hayward, 7 mi away24/7Emergencies
3Service Champions864.9★ (4,721)Livermore, 14 mi away24/7Most reviews
4EcoGuard Pest Management864.9★ (279)Dublin, 10 mi awaySat · Sun · Evenings—
5American Attic865.0★ (219)Oakland, 13 mi awaySat · Sun—
6Service Champions854.8★ (2,337)Pleasanton, 9 mi away24/7—
7Atticare USA854.8★ (439)San Leandro, 12 mi awaySat · Sun · Evenings—
8Service Champions854.9★ (3,407)San Jose, 15 mi away24/7—
9Attic Elite854.9★ (474)Newark, 4 mi awaySun—
10Reactic Restoration855.0★ (11)Fremont, 7 mi away24/7—

The 123 best insulation contractors in Union City, 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 Union City

    #1 Attic Pros

    Based in Oakland, 13 mi away

    91/100CR Score

    Ranked #1 because of its Google rating and availability: 4.8★ from 1,938 Google reviews, open 24/7.

    • 4.8★ from 1,938 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    718 Douglas Ave, Oakland, CA 94603
    View profile for Attic Pros(800) 543-0382

  3. #3 Service Champions

    Based in Livermore, 14 mi away

    86/100CR Score

    Ranked #3 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

  5. #5 American Attic

    Based in Oakland, 13 mi away

    86/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 219 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 219 Google reviews
    Hours
    Mon–Sun 7 AM–6 PM
    Address
    2721 106th Ave, Oakland, CA 94605
    View profile for American Attic(800) 461-2017

  6. #6 Service Champions

    Based in Pleasanton, 9 mi away

    85/100CR Score

    Ranked #6 because of its Google rating and availability: 4.8★ from 2,337 Google reviews, open 24/7.

    • 4.8★ from 2,337 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7020 Commerce Dr, Pleasanton, CA 94588
    View profile for Service Champions(925) 248-3458

  7. #7 Atticare USA

    Based in San Leandro, 12 mi away

    85/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.8★ from 439 Google reviews, listed on Google as “Insulation contractor”.

    • 4.8★ from 439 Google reviews
    Hours
    Mon–Fri 8 AM–7 PM · Sat–Sun 9 AM–6 PM
    Address
    303 W Joaquin Ave Unit #103, San Leandro, CA 94577
    View profile for Atticare USA(866) 647-2811

  8. #8 Service Champions

    Based in San Jose, 15 mi away

    85/100CR Score

    Ranked #8 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

  9. #9 Attic Elite

    Based in Newark, 4 mi away

    85/100CR Score

    Ranked #9 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

  11. #11 Rywen Insulation Inc.

    Based in San Leandro, 13 mi away

    85/100CR Score

    Ranked #11 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 151 Google reviews
    Hours
    Mon–Sat 8 AM–6 PM · Sun 9 AM–4 PM
    Address
    456 Hester St, San Leandro, CA 94577
    View profile for Rywen Insulation Inc.(415) 770-0342

  13. #13 Service Champions

    Based in Livermore, 14 mi away

    84/100CR Score

    Ranked #13 because of its Google rating and availability: 4.9★ from 1,331 Google reviews, open 24/7.

    • 4.9★ from 1,331 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    96 Rickenbacker Cir, Livermore, CA 94551
    View profile for Service Champions(925) 397-4867

  15. #15 Attic Star

    Based in Redwood City, 13 mi away

    84/100CR Score

    Ranked #15 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

  18. #18 Miller Attics

    Based in Walnut Creek, 22 mi away

    84/100CR Score

    Ranked #18 because of its Google rating and availability: 5.0★ from 46 Google reviews, open 24/7.

    • 5.0★ from 46 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    161 N Civic Dr, Walnut Creek, CA 94596
    View profile for Miller Attics(510) 447-6507

  24. #24 Attic Pros

    Based in San Jose, 23 mi away

    83/100CR Score

    Ranked #24 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

  25. #25 Attic Repair Guys

    Based in Fremont, 8 mi away

    83/100CR Score

    Ranked #25 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

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 123 ranked insulation contractors here; the rest are on their profiles.

insulation contractors in Union City, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Next Edge Insulation835.0★ (3)10 mi
27American Attics825.0★ (89)8 mi
28Trap Guard825.0★ (13)15 mi
29Eagle Air824.9★ (549)18 mi
30Delta Spray Foam Insulation825.0★ (34)15 mi
31AJ Heating & Cooling Inc.815.0★ (32)2 mi
32All State Insulation815.0★ (25)3 mi
33Bears Restoration804.7★ (14)24 mi
34Insulation Labs805.0★ (6)8 mi
35Finest Heating & air804.9★ (87)11 mi
36Atticguard Pro805.0★ (4)7 mi
37Bay Valley Insulation Inc804.0★ (4)8 mi
38Los Gatos Roofing804.8★ (291)17 mi
39Greenshield Insulation805.0★ (14)15 mi
40Attic City San Jose804.6★ (14)21 mi
41Rodent Exclusion Pro Oakland, CA804.8★ (18)16 mi
42Patriots Restoration805.0★ (6)11 mi
43Richmond Insulation Pros805.0★ (4)22 mi
44Newhaus Roofing & Construction794.9★ (148)19 mi
45Fremont Insulation Pros795.0★ (6)13 mi
46Everlast Attic795.0★ (7)22 mi
47Spotlight Roofing Inc795.0★ (66)17 mi
48Trio Heating & Air Hayward795.0★ (148)17 mi
49The Bay Area Insulation795.0★ (9)16 mi
50Fire Damage Squad794.6★ (5)25 mi

Also serving Union City

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 Union City
BusinessGoogle ratingDistance
Attic Bros of Milpitas5.0★ (2)14 mi
Attic Solutions3.0★ (2)22 mi
Attic Wise Cleaning5.0★ (2)12 mi
Bear Insulation and Services5.0★ (2)12 mi
Brandon's Attic Control5.0★ (2)17 mi
Brick & Hammer5.0★ (2)23 mi
Canyon Insulation Inc5.0★ (2)18 mi
Emerald Insulation & Acoustical Inc.5.0★ (2)25 mi
Insulation & Air Duct Crew5.0★ (2)6 mi
My Steam Rug & Sofa Cleaning5.0★ (2)15 mi
Panda Heating & Cooling3.5★ (2)13 mi
Peak Core Insulation5.0★ (2)20 mi
Performance Contracting Inc1.0★ (2)19 mi
Premium Shield5.0★ (1)2 mi
Prime Air Duct Cleaning5.0★ (2)19 mi
PRO ATTIC RESTORATION5.0★ (2)7 mi
Santa Clara A+ Insulation Service5.0★ (2)15 mi
Silver Peak Construction Group Inc.5.0★ (2)20 mi
Tigre Firestop & Insulation5.0★ (1)5 mi
True Arc Insulation5.0★ (1)In Union City

How much do insulation contractors cost in Union City?

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

How much do insulation contractors cost in Union City?
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 Union City insulation contractors

We scored 123 Union City 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 Union City 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 Union City: frequently asked questions

Who is the best insulation contractor in Union City?

By CR Score, the highest-ranked insulation contractor in Union City, CA is Attic Pros with a CR Score of 91/100. It has 4.8★ from 1,938 Google reviews. It is open 24/7. Pro Attic Restoration (#2) and Service Champions (#3) follow. We ranked 123 insulation contractors on 8 factors, last updated October 22, 2026.

How many insulation contractors are there in Union City?

ContractorsRanked ranks 123 insulation contractors serving Union City, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which insulation contractors in Union City are open 24/7?

41 ranked insulation contractors in Union City post 24/7 hours. The highest-ranked are Attic Pros (#1), Pro Attic Restoration (#2) and Service Champions (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which insulation contractors in Union City work on weekends?

87 of 123 ranked insulation contractors post Saturday hours and 77 post Sunday hours. The highest-ranked open Saturdays are Attic Pros (#1), Pro Attic Restoration (#2) and Service Champions (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in Union City?

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 Union City. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Union City insulation contractors have?

The median Google rating among 123 rated insulation contractors in Union City is 5.0★, with a median of 24 reviews. Service Champions has the most, 4,721 reviews, and ranks #3. 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 Union City count in this ranking?

Yes, if they are within 25 mi of the Union City 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 Union City

  1. October 2026: CR Scores recalculated for 123 insulation contractors serving Union City.

More insulation contractors and Union City pages

Other trades in Union City