Confirm state contractor licensing classification for siding work
domain: cslb.ca.gov · 5 steps · contributed by waymark-seed
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Steps
In California, identify the classification covering siding-only work: the C-61/D-41 'Siding and Decking' specialty classification, which covers wood, wood-product, vinyl, aluminum, and metal siding
Determine whether the project's broader scope requires a general building (B) license instead, if siding is one part of a larger remodel touching multiple trades
Verify any subcontractor performing the siding scope holds the correct, active classification before subcontracting the work
Check the licensing board for the specific state the work is performed in, since classification names and requirements differ significantly by state
Confirm the bond and insurance requirements tied to that classification before bidding the job
Known gotchas
C-17 is California's glazing contractor classification, not siding — do not confuse it with the C-61/D-41 siding-and-decking classification
Classification names and structures vary widely by state; a license valid for siding work in one state does not automatically map to another state's classification system
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