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 Harfred Labs, 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.
Plumbline is free to use on one project at a time, with no time limit. A Solo seat, which lifts that limit, is A$49 per user per month, or A$490 per user per year when billed annually; five seats or more are A$39 per seat per month, billed annually. All figures are in Australian dollars and exclude GST.
Nothing is being charged during early release. Fees are billed in advance once they begin. 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.
Plumbline is a software tool. It is not a building surveyor, a certifier, an engineer or a consultant, and nothing it produces is professional advice, a certificate, an approval, an assessment, or evidence that a building or design complies with the National Construction Code or any other law.
Do not rely on its output as the basis for a compliance decision. A Pass means the tool measured one number against one threshold in a rule pack and they agreed. It does not mean the element complies, that the relevant clause was correctly identified, or that the clause is the one in force. An empty report is not evidence of anything. Every finding, including a Pass, needs independent confirmation by a suitably qualified person exercising their own judgement.
You are the professional. Where you use Plumbline in work you deliver, that work and the judgements in it remain yours, and you are responsible for them to the same extent as if the tool had not been used. Using it does not discharge, reduce or transfer any duty you owe to your client, to a certifier, or to anyone else.
Subject to clause 8, and to the extent the law allows: the software is provided “as is” and “as available”; we make no warranty that it is fit for any particular purpose, that it is free of error or omission, that its rule packs are accurate, current or complete, or that it will identify any given non-compliance or any non-compliance at all.
To the extent the law allows, we are not liable for any loss or damage of any kind arising out of or in connection with the software or anything it produces. That includes, without limitation: loss arising from a non-compliance the software did not report; loss arising from a finding it reported that was wrong; rectification, demolition or rebuilding costs; delay, rejection or refusal of an approval; loss of profit, revenue, opportunity or data; and any indirect or consequential loss. It applies however the loss arises, including through our negligence.
Where liability cannot be excluded, our total aggregate liability for all claims is limited to the greater of AUD $100 and the fees you paid us for the software in the twelve months before the claim arose. Where the software is supplied at no charge, our liability is limited to AUD $100 in total.
Reports and files that Plumbline produces are for your own use. If you give one to a client, a builder, a certifier, an authority or anyone else, you do so on your own account and on your own responsibility.
We owe no duty of care and give no undertaking to any person who receives a report or other output and is not a party to these terms, and we accept no liability to any such person. If you pass output on, you must not present it as our assessment, as a compliance certificate, or as evidence of compliance, and you must not remove the notices the software places on it.
You indemnify us against any claim, loss, cost or expense (including reasonable legal costs) brought by a third party and arising out of your use of the software or your use or distribution of anything it produces — except to the extent the claim is caused by our own wilful misconduct, and except where and to the extent the law does not permit such an indemnity.
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.