Last updated 30 August 2026
These terms cover the Plumbline add-in and this website. By installing or using the software you accept them.
The most important term is this one. Plumbline is an aid to design review. It is not a compliance certificate, an approval, or a substitute for a registered building surveyor or certifier. A report with no failures is not evidence that a building complies with the National Construction Code.
Plumbline is published by Jeremy Marks, in Australia. Contact details for support, billing and legal notices are provided with your licence. These terms are governed by the law of Victoria, Australia, and the courts of that State have jurisdiction.
Subject to payment, you get a non-exclusive, non-transferable right to install and use the add-in for the term you have paid for. A seat licence is for one named user. You may install it on more than one machine that you personally use, but a seat may not be shared between people.
You may not:
Rule packs are data, and you may edit them, write your own, and share the ones you write with whoever you like. Modifying a shipped rule pack does not make its results ours.
A seat is A$120 per user per month, excluding GST. Fees are billed in advance. You may cancel at any time and your licence runs to the end of the period you have paid for; we do not refund part-periods. If we change the price we will tell you before it takes effect and the change applies from your next renewal.
The software is in early release. It has known gaps, the rule set is still being built out, and behaviour may change between versions. We describe what the tool does and does not cover on the site and in the software itself, and we keep that description honest, but you should treat this as a tool under active development.
Plumbline reads a Revit model and reports where it appears to miss thresholds recorded in the rule packs you have selected. Its results depend entirely on how the model is built, named and parameterised. In particular:
Every finding, including a Pass, needs confirmation by a suitably qualified person.
You remain responsible for the design, for compliance, and for the professional judgements you make. You are responsible for keeping your own backups of your models and of any reports you export. Nothing in the software transfers professional liability to us.
Plumbline does not include or reproduce the National Construction Code. Rule packs carry threshold values, clause references and our own descriptions of what the software checks. The NCC is © Commonwealth of Australia and the States and Territories 2022, published by the Australian Building Codes Board, and is licensed CC BY-ND 4.0. You need your own access to the Code to use this tool responsibly.
We are not affiliated with, endorsed by, or acting for the ABCB. Autodesk and Revit are trademarks of Autodesk, Inc.; Plumbline is not an Autodesk product and Autodesk does not endorse it.
Our goods and services come with guarantees that cannot be excluded under the Australian Consumer Law. Nothing in these terms limits those rights. Where the law permits us to limit our liability, we limit it to resupplying the software or refunding what you paid for it, at our option.
Subject to clause 8, and to the extent the law allows: the software is provided as is; we do not warrant that it is free of error or that it will identify every non-compliance; and we are not liable for indirect or consequential loss, loss of profit, loss of data, or any loss arising from reliance on a report as evidence of compliance. Our total liability for any claim is limited to the fees you paid in the twelve months before the claim arose.
We may suspend or terminate a licence if fees go unpaid, or if the software is used in breach of clause 2. You may stop using it at any time. On termination your right to use the software ends; rule packs you wrote remain yours, and reports you have already exported remain yours.
We may update these terms. If a change materially affects you we will tell you before it takes effect, and it will apply from your next renewal. The date at the top shows when this page last changed.
How we handle data is set out in the privacy policy. In short, the add-in runs on your machine and sends nothing anywhere.