How can I verify this license myself?

You can check the status directly at the California Contractors State License Board official lookup.

What does the C-39 classification cover?

The C-39 license covers roofing work, and the record shows workers' compensation is on file with the State Compensation Insurance Fund.

When was this business first licensed and what does 'active' mean?

The record shows the first license date as 1977. 'Active' means the license is currently valid and not suspended or revoked.

When does the license expire?

The license expires on 2027-10-31. Checking the current status matters because a license can be suspended or revoked at any time.

What should I check before hiring a roofing contractor?

Verify the license status yourself, get the full scope in a written quote, and ask for local addresses of past jobs.

Home › Roofing › California › Diffenbaugh Donald D Construction INC

Diffenbaugh Donald D Construction INC

Roofing contractor · EL Cajon, CA 92020 · record last checked July 11, 2026

License active — checked July 11, 2026

License

337039

C-39 Roofing Contractor

Status

active

in good standing per state record

First licensed

1977

per California Contractors State License Board (CSLB)

Expires

October 31, 2027

renewal required

Diffenbaugh Donald D Construction INC holds an active C-39 Roofing Contractor license issued by the California Contractors State License Board. The business is located in El Cajon, CA, and the record shows it was first licensed in 1977.

What this record does — and doesn't — tell you

A license means the state issued a permit to operate; it does not indicate the quality of work or customer experience. You must verify the license status yourself and check the full scope in a written quote before signing.

Verify this license yourself (30 seconds)

Don't take our word for it — or anyone's. Search license 337039 at the official California Contractors State License Board (CSLB) lookup and confirm the status is current before you sign anything.

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Business phone of record

(619) 654-1375 (from the California Contractors State License Board (CSLB) license file — call them directly)

Common questions

How can I verify this license myself?: You can check the status directly at the California Contractors State License Board official lookup.
What does the C-39 classification cover?: The C-39 license covers roofing work, and the record shows workers' compensation is on file with the State Compensation Insurance Fund.
When was this business first licensed and what does 'active' mean?: The record shows the first license date as 1977. 'Active' means the license is currently valid and not suspended or revoked.
When does the license expire?: The license expires on 2027-10-31. Checking the current status matters because a license can be suspended or revoked at any time.
What should I check before hiring a roofing contractor?: Verify the license status yourself, get the full scope in a written quote, and ask for local addresses of past jobs.

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Source: California Contractors State License Board (CSLB), license file dated July 11, 2026. Safe Home Experts re-checks California records on a fixed schedule and unpublishes lapsed licenses. This page describes a public record — it is not a review, rating, or endorsement. Corrections: data corrections.