A construction company email signature with your license number on it
Put the contractor license number in the company footnote once, and it is under every owner, project manager and estimator signature, with their own name and phone.
What to include
- Name, title and a direct phone number for the job site and the office.
- The company name exactly as licensed.
- The contractor license number, with the ROC prefix in Arizona, as the company footer.
- The company website and email.
- A logo for a company that uses one, the same on every person's signature.
What state rules say about a contractor license number
These are the primary sources, quoted or summarized, for the states with the clearest wording. No rule found names email outright. Signatoro is not a law firm, and this is not legal advice.
- California, B&P Code 7030.5: every licensee includes the license number in "all construction contracts", "subcontracts and calls for bid", and "all forms of advertising". Cal. B&P Code 7030.5
- California, 16 CCR 861: advertising for that rule includes "any card, contract proposal, sign" and "any electronic transmission." 16 CCR 861 (Cornell LII copy)
- Arizona, A.R.S. 32-1124(B): the license number, preceded by "ROC", goes on written bids and estimates and on "all published advertising, letterheads and other documents used by the licensee to correspond with the licensee's customers or potential customers." A.R.S. 32-1124
- Florida, Statutes 489.119(5)(b): the registration or certification number appears in each offer of services, business proposal, bid, contract or advertisement, "regardless of medium". Business stationery is excluded from "advertisement". Fla. Stat. 489.119
- Washington, RCW 18.27.100(3)(a): advertising that shows the contractor's name or address shows the current registration number, as do all materials used to directly solicit business from retail customers. RCW 18.27.100
- Texas, 16 TAC 73.51(e): electrical contractors' advertising designed to solicit electrical business includes the contractor's name and license number, business cards included. 16 TAC 73.51 (Cornell LII copy)
Sources checked 2 October 2026.
The license number, once for everyone
A contractor license belongs to the company, so it fits the company footnote: on the Up to 15 plan or larger, the owner writes it once on Signatoro and it sits under every signature. When the license is renewed under a new number, everyone gets their updated signature by email to paste, and an AI assistant that sends bids or follow-ups uses it on its next send.
See it rendered
Line
Four lines, no picture. The default.
| Luis Herrera |
| Owner, Ridgeline Builders LLC |
| +1 602 555 0123 · luis@ridgelinebuilders.com |
| ridgelinebuilders.com |
| Ridgeline Builders LLC, licensed Arizona contractor ROC 123456. |
Best for any team and any thread: text only, so it reads the same in every mail app, on a phone and with images turned off.
Mark
Logo beside a hairline, or your photo if there is no logo. Company first.
 |
|
Best for company-first mail, such as a firm, a brokerage or a shared inbox, where the logo should lead.
Portrait
Round photo, or your logo if there is no photo. Person first.
 |
|
Best for people clients meet in person, such as agents, advisors and recruiters, where a face builds trust.
Stack
One fact per line under an accent rule.
| Luis Herrera | |
| Owner | |
| Ridgeline Builders LLC | |
| +1 602 555 0123 | |
| luis@ridgelinebuilders.com | |
| ridgelinebuilders.com | |
| Ridgeline Builders LLC, licensed Arizona contractor ROC 123456. |
Best for long titles and several contact lines, kept easy to read on a narrow phone screen.
Compact
One line, for replies.
| Kate Donnelly · Project Manager, Ridgeline Builders LLC · +1 602 555 0178 |
| Ridgeline Builders LLC, licensed Arizona contractor ROC 123456. |
Best for replies and internal mail, where a full signature in every message is too much.
Make yours from these templates
Pick a template above or start from the one below. Change the details to yours and copy the signature into Gmail, Outlook or Apple Mail. It is free and needs no account.
Questions people ask
Does my email signature need my contractor license number?
Does every employee need the number, or only the company?
Can I link to my website instead of showing the number?
What format does the number take?
Is an email signature "stationery" in Florida?
Built into every signature
- A compliance footnote the owner writes once, shown under every member's signature.
- A shared company footer - logo, layout, color, font, review badge and booking button - that every member's signature follows.
- Logo and photo support, hosted so they show without attachments.