Plain English, no lawyer padding. The short answer is that the blocks are yours to use — including on paid work — and you owe us nothing.
Last updated August 20, 2026. Operated by Quantum Armadillo, LLC.
Every block in the CADdillo block library — 219 symbols across 18 categories, and every DXF file served from those pages — is dedicated to the public domain under Creative Commons CC0 1.0 Universal.
To the extent possible under law, Quantum Armadillo, LLC has waived all copyright and related or neighbouring rights to this geometry. You may copy, modify, distribute and use the blocks, including for commercial purposes, all without asking permission and without crediting us.
Concretely, all of the following are fine, and none of them require telling us:
We would rather you sent people to the source than mirrored a stale copy, and a link back is genuinely appreciated — but it is a request, not a condition. CC0 means CC0.
The public-domain dedication applies to the block geometry. It does not extend to:
This matters more here than on a typical asset library, so it is stated plainly rather than buried.
The blocks are drafting symbols. They are drawn to scale and follow common conventions — electrical symbols follow NEC drafting practice, instrumentation follows ISA figures, sinks are drawn to NSF proportions, accessible fixtures to ADA dimensions — but drawing a symbol that follows a convention is not the same thing as code compliance, product certification, or engineering judgment.
Nothing here is stamped or sealed. Nothing here has been reviewed by a licensed engineer or architect for your project, your jurisdiction, or your code cycle. Verify dimensions, clearances and code requirements against the governing standard and the actual specified product before anything is built. The responsibility for what goes into a construction document is the responsibility of whoever signs it.
The blocks are provided as is, without warranty of any kind, express or implied, including merchantability and fitness for a particular purpose. Quantum Armadillo, LLC accepts no liability for any claim, damages or other liability arising from their use.
Not required, genuinely. If you would like to, this is the form that helps most:
CAD blocks by CADdillo — caddillo.com
If any of this is unclear, or you need something in writing for a client or a procurement process, get in touch and we will answer plainly. If you think a term here is wrong or contradicts what the site actually does, tell us — we will fix the wording or the behaviour, whichever is broken.
