Marathon Insulation

Licensed insulation contractor in Sylmar, Los Angeles, California

CSLB licence active5.0(3 reviews)

Marathon Insulation holds CSLB licence 1094776, active, licensed since 29 Jul 2022, rated 5.0 from 3 Google reviews. Bonded for $25,000 with American Contractors Indemnity Company. Clean CSLB record, with no citations, complaints or legal actions disclosed.

63score

Report card

  • Licence activeCSLB #1094776, class C-2. Issued 29 Jul 2022, expires 31 Jul 2028.
  • Licensed 4 yrsSince 29 Jul 2022.
  • Bonded$25,000 with American Contractors Indemnity Company, since 1 Jan 2023. California requires the same $25,000 bond of every contractor.
  • Workers' comp insuredThe Pie Insurance Company, policy WCPI1223604002, valid to 15 Jul 2027.
  • Clean CSLB recordNo citations, complaints or legal actions disclosed.CSLB record
  • BBB AccreditedIts BBB rating, complaints and reviews are on its Better Business Bureau profile.BBB profile Complaints Reviews

Checked against the Contractors State License Board (CSLB) register on 4 Nov 2026.

About Marathon Insulation

People on the licence
Jonathan Sanchez (owner)

Google reviews

5.0(3 reviews)
A S★★★★★ 3 months ago

These guys are great. From start the finish the whole team were very professional and respectful of our home. The materials they used were top notch and eco friendly which we were looking for and dropped the interior temperature of our home significantly which is helping us save thousands of dollars on electricity bills. The process was fast and non invasive and they left our home clean after they finished. I would …

Chris M★★★★★ a year ago

Marathon Insulation: Exceptional Service and Results Marathon Insulation truly exceeded my expectations. From the initial quote, their process was incredibly easy, and the pricing was very competitive. What particularly impressed me was their responsiveness and clear communication throughout the entire process; they were completely transparent with their pricing, which I greatly appreciated. A significant advantage …

Jennifer Cho★★★★★ 2 years ago

Did insulation twice with these guys and both times were impressive! We had our attic cleaned, rooldent proof and insulated a couple of months back. They did a great job and we're quick. This time around we had 1 room insulated. They drilled the holes, insulated it then patched it up after. We had some decals and stuff hanging on the walls and they were considerate to drill the holes around it. The price was also …

Read all 3 reviews on Google Reviews and photos from Google, refreshed every 30 days.

Why it ranks #31 of 57 insulation contractors in Los Angeles

Years licensed weight 3021%
Complaint record weight 25100%
Bond and workers' comp weight 10100%
Google reviews weight 3562%

Score 62.9 / 100. Claiming this listing or using Theo never changes it. How we rank

Other top insulation contractors in Los Angeles

See all 57
  1. 1

    Everguard Home Insulation Inc

    Woodland Hills, CA · CSLB C-2 #224328 · licensed 63 yrs

    • Licence active
    • Bonded
    • Workers' comp
    984.9(197)Full report
  2. 2

    Mike's Building Corp

    Van Nuys, CA · CSLB B, C-2, C10 #803105 · licensed 25 yrs

    • Licence active
    • Bonded
    • Workers' comp
    904.6(21)Full report
  3. 3

    So-cal Insulation Inc

    Los Angeles, CA · CSLB C-2 #824734 · licensed 23 yrs

    • Licence active
    • Bonded
    • Workers' comp
    865.0(3)Full report
  4. 4

    Arctic Insulation Inc

    Wilmington, CA · CSLB C-2 #566901 · licensed 38 yrs

    • Licence active
    • Bonded
    • Workers' comp
    864.6(5)Full report
  5. 5

    Circulating Air Inc

    North Hollywood, CA · CSLB B, C-2, C-4, C10, C20, C38, C43 #240778 · licensed 61 yrs

    • Licence active
    • Bonded
    • Workers' comp
    864.3(19)Full report
  6. 6

    Progressive Insulation & Windows

    Chatsworth, CA · CSLB B, C-2, C17 #418046 · licensed 45 yrs

    • Licence active
    • Bonded
    • EPA Lead-Safe
    864.6(34)Full report