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Plumbing and HVAC van lettering: name, license number and address rules in California
The address rule most plumbers miss
Business and Professions Code 7029.5 adds an address requirement for plumbing, electrical sign and well drilling contractors: name, address and license number on each side of the vehicle. HVAC contractors follow the general rule in 7029.6, name and license number, no address. Get the trade right and the sweep is a non-event.
Layout
Name on top, address as one line, 'Lic# 1098765' under it, phone last. Five lines at 1.5 inch fits a Transit door. Put it on both front doors; the sliding door is a bonus, not a substitute.
USDOT?
Only if the van is rated over 10,001 lbs or tows over it. Most service vans aren't.
Related questions
Do I need my address on an HVAC van?
No, only name and license number. Plumbing, electrical sign and well drilling contractors need the address too.
Can I use a PO box as the address?
The statute says business address. A PO box you're registered under with CSLB is generally accepted, but the office address is safer.
Checked against 49 CFR 390.21, 13 CCR 1256 and B&P 7029.6, September 2026. Plain-English summary, not legal advice.