Tradie Forms: complete QLD Form 12 on the official PDF layout while the inspection details are still fresh. Work through the aspect, property, basis, reference documents, competent person details, and signature before the certificate goes to the building certifier.
QLD Form 12 is one of those building forms that looks simple until you are trying to finish it between site noise, phone calls, and a certifier waiting for the handover pack.
The form is used by an appointed competent person for an aspect inspection certificate in Queensland. In plain site language, it records the aspect of building work you inspected, the property, the building or structure, the extent of work covered, the basis for your certification, the documents you relied on, and your details as the appointed competent person.
The best time to complete it is while the inspection is still in front of you. You know what you looked at. You know which plans, standards, test results, or specifications were relied on. You can check the lot and plan, local government area, and building certifier details before the job moves on.
Use the QLD Form 12 template when you want a guided version of the official PDF layout, or browse QLD building forms as more building paperwork comes online.
What QLD Form 12 is for
The Queensland Government Form 12 PDF says it is the approved form to be used under sections 74 and 77 of the Building Regulation 2021. It is for an appointed competent person statement that an aspect of work has been completed and complies with the building development approval.
Business Queensland lists Form 12 as "Aspect Inspection Certificate (Appointed Competent Person)" on its building forms page. That same official forms page also lists related building forms, including Form 15 for design or specification and Form 16 for inspection certificates.
That matters because Form 12 has a specific job. It is not a general building certificate and it is not a note to the builder. It is the record a building certifier may rely on for an inspected aspect of building work.
Business Queensland's guidance on competent persons says a building certifier may use a competent person to help inspect aspects of a stage of building work, after the certifier has determined that the person is competent for that inspection help. The competent person gives Form 12 to the building certifier for the work they complete so the certifier can confirm the stage is complete.
Tradie Forms maps your entries onto the official PDF layout. It does not decide whether you are competent for the inspection, whether the aspect complies, or whether the building certifier can rely on the certificate. That judgement stays with the people responsible under the building approval and current law.
Who completes Form 12
The Form 12 appendix explains that an individual must be assessed and appointed as a competent person before they can give inspection help to a building certifier. The appointment is not just a casual site request. The building certifier has to decide the person is competent for the type of inspection help.
For the person completing the certificate, the practical check is simple:
- Were you appointed by the building certifier for this inspection help?
- Does the aspect match the help you were appointed to give?
- Did you inspect the aspect, or are you relying on another certificate in a way the regulation allows?
- Are your licence, registration, experience, and scope details current where they apply?
- Can you clearly state the basis for your certification?
If any of those questions are unclear, sort that out before exporting the PDF. A neat form is useful, but the certificate still has to match the real job.
Where Form 12 fits in the job flow
Building jobs move in stages. The certifier may need certificates for relevant aspects before a stage can be confirmed. Business Queensland's inspection stages guidance explains that mandatory inspections apply to class 1a and class 10 buildings in different ways, and that building approvals may list additional stages that require inspection.
On site, Form 12 usually sits in the handover between an aspect inspection and the building certifier's record. It can cover aspects such as waterproofing, tiling, glazing, energy efficiency, emergency lights, exit signs, smoke detection, or air-conditioning when that is the aspect being certified and the appointment fits.
The form does not replace the building certifier's role. Business Queensland's guidance notes that the certifier still has responsibilities around stage inspections. The point of Form 12 is to give the certifier a clear aspect certificate they can assess as part of their work.
That is why vague certificates cause pain. If the aspect, location, basis, or references are unclear, the certifier may need to ask for more detail before moving the file forward.
Details to collect before you export
Form 12 is easiest when you treat it as part of the inspection, not as admin for later. Before you leave the site, check each block against the job record.
Aspect of building work
Start with the aspect. The official form gives examples such as waterproofing, tiling, glazing, energy efficiency, emergency lights, exit signs, smoke detection, and air-conditioning.
Do not write a broad label if the certificate only covers a narrow part of the work. "Wet area waterproofing to level 2 bathrooms" is clearer than "waterproofing" if that is the actual scope. "Emergency lighting to tenancy fit-out, ground floor" is more useful than "lights".
The aspect should match what you inspected and what you were appointed to inspect.
Property description
The official form asks for a property description that identifies all land subject to the application. It includes street address, state, postcode, lot and plan details, and local government area.
Do not rely on the postal address from an invoice. Use the property details tied to the building approval. On bigger sites, unit developments, staged subdivisions, rural properties, and commercial projects, the lot and plan details matter.
If the lot and plan are wrong, the certificate may be hard to match to the approval later.
Building or structure
Describe the building or structure and include the class. The Form 12 appendix points to the National Construction Code classification.
Keep the wording plain but specific. "Class 1a dwelling and attached garage" tells a clearer story than "house". For a commercial job, include the part of the building that relates to the aspect if that helps the certifier understand the certificate.
Extent of aspect work certified
This is a common rework point. The official form asks you to clearly describe the extent of work covered by the certificate, including location where relevant.
Good extent wording says what was inspected and where. It does not suggest you certified work you did not inspect.
Examples:
- "Waterproofing membrane to ensuite, bathroom, and laundry wet areas in unit 3"
- "Structural steel roof beams shown on engineering drawing S04, north warehouse extension"
- "Smoke detection installation to level 1 common corridor and tenancy 1.02"
The certificate should be useful to someone who was not standing next to you at the time.
Basis of certification
The form asks for the basis for giving the certificate and the extent to which tests, specifications, rules, standards, codes of practice, or other publications were relied on.
This is not a throwaway field. It explains how you reached the statement you are signing. Use the standards, drawings, specifications, test results, product documents, or other material that actually supported the inspection.
If the basis is too thin, the certifier may need more information. If it is too broad, it can make the certificate look like it covers more than the inspection did.
Reference documentation
Clearly identify relevant documents. The official form gives numbered engineering plans as an example.
Use document numbers, revisions, drawing titles, dates, and report references where they are available. A reference like "plans" is not enough on a busy project. "Structural drawings S01 to S05, Rev C, dated 3 May 2026" is much more useful.
If the job relies on photos, test reports, certificates from other appointed competent persons, product documents, or installation manuals, keep those with the job record.
Certifier details
Record the building certifier's name, reference number, and building development approval number. Check these against the approval documents or certifier request, not an old email subject line.
Certifier reference details are often copied between jobs. That is handy until one digit is wrong or a previous approval number sneaks into a new certificate.
Competent person details and signature
The form needs the appointed competent person's name, company name where applicable, contact details, postal address, licence class or registration details where applicable, the date the inspection request was received from the certifier, signature, and date.
Saved details help here. In Tradie Forms, you can reuse competent person contact and licence details instead of typing the same block every job. Still check them before export, especially after licence renewals, business address changes, or staff changes.
Common Form 12 mistakes
The aspect is too broad
Broad wording can make a certificate look like it covers more work than you intended. If you inspected only one area, stage, room, product, or system, say so.
The property details come from the wrong source
The job address in a booking system may not include lot and plan details or the correct local government area. Check the approval documents and site information before export.
The basis is thin
"As per plans" does not tell the certifier much. Use the actual drawing numbers, standards, codes, product information, test results, or specifications that support your statement.
Reference documents are not identified
If supporting documents matter, name them properly. Revision numbers and dates save arguments later.
The certificate is finished away from site
Waiting until later means you are relying on memory. Complete the certificate while the plans, photos, marked-up drawings, and site conditions are still fresh.
How Tradie Forms helps
Tradie Forms turns Form 12 into guided sections instead of a flat PDF. You work through the form in the same order as the official layout:
- Aspect of building work
- Property description
- Building or structure
- Extent of aspect work certified
- Basis of certification
- Reference documentation
- Building certifier details
- Appointed competent person details
- Signature and date
The form can save competent person details for the next job, flag missing required fields before export, and show a preview of the official PDF layout before you download it.
That means you can finish the certificate at the site office, in the ute, or back at the workshop without rebuilding the job from memory. Download the PDF, send it to the certifier, and attach it to the job record your business uses.
Record keeping and handover
Keep the final Form 12 with the documents that support it. That may include:
- Building certifier request or appointment information
- Building development approval number
- Drawings, specifications, and revisions relied on
- Photos or inspection notes
- Test reports or product documents
- Related certificates
- The exported Form 12 PDF
Use a file name that the office can find later. Date, project, property, aspect, and form name is enough for most small teams.
Next steps
Start the QLD Form 12 aspect inspection certificate when you need to finish the certificate on the official PDF layout, or browse QLD building forms for other building paperwork as coverage expands.
For official requirements, check the Business Queensland building forms page, the Queensland Form 12 PDF, the Business Queensland competent persons guidance, and the Business Queensland building inspection stages guidance.