- License number
- 520533
- Licensed for
- General Building, Painting & Decorating, Roofing
- First issued
- 1987
- Valid through
- Nov 2027
- Bond
- Bonded $25,000
- Workers' compensation
- Workers' comp insured · through Oct 2026
- Source checked
- Jun 27, 2026
Public evidence profile
Karl Kardel Co., Inc.
Credentials & registries
2 credentials shown
No Trust Score yet
- Rated 4.4 from 6 reviews
- 2 credentials shown
Based on rating, review volume, independent sources and credential evidence. Evidence context, not a guarantee of workmanship.
Credentials and associations
2Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
- Source reference
- NAT-58828-2
- Source checked
- Jun 27, 2026
Reviews · public evidence
What customers say
These review totals are published independently on the named public source below, not testimonials this business chose to show. We show the aggregate rating, review volume, and source attribution we hold so you can weigh the evidence yourself.
4.4out of 5
Where these reviews are published
- Porch6 reviews · 4.4 avg
Sources
3 named public sourcesWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Registers and membership directories
Check dates vary by source. Where we hold a date, the check shows it.
About
At karl kardel company we are passionate about solving complex building problems. our business was founded in 1959 with a focus on architectural restoration of victorian and historical homes throughout the bay area. since then we have expanded our work across several areas, with a focus in waterproo... Read more about Karl Kardel Co., Inc.
Your own checks
What to check before you hire
Worth checking yourself
Always confirm credentials and quotes with the business directly before hiring.
Contractor licensing in the US is set by each state (and sometimes the city or county). For electrical, plumbing, HVAC or any major build, confirm the trade is licensed on your state's licensing board before hiring. Unlicensed work where a license is required can void permits and insurance and leave you no recourse.
Ask for a lien waiver as you pay each stage: in most US states an unpaid contractor or subcontractor can place a mechanic's lien on your home even if you already paid the main contractor, and a signed waiver is your protection.
Ask to see a portfolio of completed work like yours, plus recent references you can contact.
Want an extra legitimacy check? Run the Rogue Contractor Check on Karl Kardel Co., Inc. before you contact them.
Run Rogue Contractor Check →Good to know
Common questions about Karl Kardel Co., Inc.
Is Karl Kardel Co., Inc. a legitimate business?
Karl Kardel Co., Inc. has 6 independent public reviews, rated 4.4 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Karl Kardel Co., Inc.?
Karl Kardel Co., Inc. has 6 public reviews, averaging 4.4 out of 5. The reviews section shows the aggregate rating, review volume, and review source information we hold.
How do I know Karl Kardel Co., Inc.'s reviews are genuine?
Karl Kardel Co., Inc.'s 6 public reviews come from a named public review source. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show the review source information and aggregate rating we hold rather than selling rankings, so you can weigh the evidence for yourself.
Is Karl Kardel Co., Inc. qualified and accredited?
We hold 2 independently sourced credentials for Karl Kardel Co., Inc., including California Contractors State License Board, US EPA Lead Renovation, Repair and Painting Program. Each is attributed to the body that issued it in the credentials section. For example, California Contractors State License Board is California's Contractors State License Board: the state body you must be licensed with to do contracting work in California.
