> ## Documentation Index > Fetch the complete documentation index at: https://docs.cslid.nascla.memorang.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # West > 13 jurisdictions including some of the most comprehensive licensing regimes in the country. The West includes 13 jurisdictions and some of the most comprehensive licensing regimes in the country. California, Arizona, Nevada, and Hawaii regulate virtually all construction at the state level with low dollar thresholds. Other Western states like Colorado, Montana, and Wyoming regulate only specialty trades. Several states in this region — notably California, Arizona, Utah, and Nevada — are NASCLA reciprocity participants. Comprehensive state-level regulation of commercial, residential, and public works construction. All construction exceeding **\$1,000** or requiring a building permit must be licensed; dual residential/commercial structure. CSLB licenses all construction at **\$1,000**+ threshold; one of the most detailed classification systems nationally. State regulates plumbing and electrical only; general construction regulated locally. All commercial, residential, and public works construction regulated at the state level. State-level regulation for home construction, commercial work, electrical, plumbing, and HVAC. State licensing limited to plumbing and electrical trades. Full state licensure for all commercial and residential contracting. Comprehensive state-level regulation of commercial, residential, and public works construction. State regulates virtually all residential and commercial construction. All construction of **\$3,000** or more regulated at state level; NASCLA reciprocity participant. Registration-based system covering all construction work including asbestos abatement. State regulation limited to electrical work only.