Both the Certificate IV and Diploma of Building and Construction are nationally recognised qualifications that open doors to builder's licences across Australia. But what each qualification allows you to build—and the licence class you can apply for—varies significantly from state to state. This guide compares both courses and breaks down what you need in every state and territory.
See how the Certificate IV and Diploma stack up across the key factors that matter most when choosing your building qualification.
| Feature | Certificate IV (CPC40120) | Diploma (CPC50220) |
|---|---|---|
| Course Code | CPC40120 (CPCBC40120) | CPC50220 (CPCBC50220) |
| Full Title | Certificate IV in Building and Construction | Diploma of Building and Construction |
| AQF Level | Level 4 | Level 5 |
| Duration | 6–12 months | 12–18 months |
| Units of Competency | 19 units (11 core + 8 elective) | 27 units (24 core + 3 elective) |
| Delivery | 100% Online, Self-Paced | 100% Online, Self-Paced |
| Building Scope | Class 1 & 10 buildings, Class 2–9 Type C (up to 2 storeys) | Class 1 & 10 buildings (up to 3 storeys), Class 2–9 Type B (up to 3 storeys) |
| Typical Licence | Low-rise residential builder, site supervisor | Medium-rise builder, construction manager |
| Project Types | Houses, townhouses, renovations, small commercial | Multi-storey residential, commercial developments, larger builds |
| RPL Available | Yes | Yes |
| Nationally Recognised | Yes — all states & territories | Yes — all states & territories |
Licensing requirements vary across Australia. Here's what the Certificate IV and Diploma qualify you for in each state and territory, including the licensing authority, experience requirements, and whether an exam is involved.
| State | Authority | Certificate IV Gets You | Diploma Gets You | Min. Experience | Exam? |
|---|---|---|---|---|---|
| QLD | QBCC | Builder Low-Rise, Site Supervisor Low-Rise | Builder Medium-Rise, Site Supervisor Medium-Rise | 2 yrs (with trade) or 4 yrs | No |
| NSW | NSW Fair Trading | General Builder's Contractor Licence | Higher licence classes, complex projects | 2 years | No |
| VIC | BPC (formerly VBA) | Domestic Builder via equivalency pathway + exam | Domestic Builder Unlimited (prescribed qualification) | 3 years | Yes (70% pass) |
| SA | CBS | Building Work Supervisor + Contractor Licence (residential to unrestricted) | Higher-level qualification for broader scope | 5–6 years + 5 projects | Interview |
| WA | Building Services Board | Not the primary pathway* | Building Practitioner + Building Contractor (Set 1) | 5–7 years | No (Board exams optional) |
| TAS | CBOS | Domestic Builder, Low Rise Builder | Medium Rise Builder | 2 yrs (with trade) or 4 yrs | No |
| NT | Building Practitioners Board | All categories (Residential & Commercial, Restricted & Unrestricted) | Not required (Cert IV covers all NT categories) | 3 years | No |
| ACT | Access Canberra | Class C Builder (Low Rise) | Class B Builder (Medium Rise) | 2 years (1 yr post-qualification) | Yes (80% pass) |
*In WA, the Diploma (CPC50220) is the primary qualification for building practitioner registration under Set 1. Alternative pathways exist via RPL or Board examinations for experienced builders without the Diploma.
Important: Qualification is only one part of the equation
Every state requires practical construction experience alongside your qualification—ranging from 2 years (NSW, ACT, QLD with a trade) to 7 years (WA). Some states also require exams (VIC, ACT), technical interviews (SA), financial capacity evidence (QLD, WA, NT), or specific insurance. Read our complete builder's licence guide for the full picture across all states. Both qualifications are delivered 100% online, so you can study while you work.
Each state and territory has its own licensing authority, terminology, and requirements. Here are the standout details you should know.
QBCC
Queensland uses a clear tiered system: Low-Rise, Medium-Rise, and Open builder licences. The Certificate IV qualifies you for Builder Low-Rise (Class 1 & 10 unlimited, Class 2–9 Type C up to 2 storeys). The Diploma unlocks Medium-Rise (up to 3 storeys, Type B). Experience requirement is 2 years with a carpentry or bricklaying trade, or 4 years otherwise. QBCC also requires Minimum Financial Requirements (MFR) based on your annual revenue. Queensland also offers site supervisor licences — explore the Open Class Site Supervisor (QLD) pathway.
Read full QLD guide →NSW Fair Trading
NSW doesn't use low-rise/medium-rise terminology. The Certificate IV qualifies you for a general builder's contractor licence for residential work over $5,000. No exam is required—it's document-based. You need 2 years of relevant experience. NSW also offers a supervisor certificate as a stepping stone. Licence fees vary from $830 (1 year) to $2,716 (5 years) depending on the applicant type. Processing takes approximately 13 weeks. Prepare Training offers a Diploma designed for NSW and WA licensing requirements.
Read full NSW guide →Building & Plumbing Commission (formerly VBA)
Victoria uses “registration” rather than “licensing” and applies to individuals, not companies. The Diploma is the prescribed qualification for Domestic Builder Unlimited (DB-U) registration. However, a Certificate IV equivalency pathway exists where you sit BPC exams and assessments. Either way, you need 3 years of experience and must pass an online proctored exam (70% pass mark) plus an assessment interview. Registration costs around $1,011 with annual renewals of $506.
Read full VIC guide →Consumer and Business Services (CBS)
SA has a dual system requiring both a Building Work Contractor's Licence and a Building Work Supervisor Registration. The Certificate IV satisfies the technical requirement for all supervisor registration categories, from residential through to unrestricted building work. Experience requirements are higher—5 years plus 5 completed projects for residential, 6 years for unrestricted. A face-to-face technical interview (up to 1 hour) is mandatory. Penalties for unlicensed work increased dramatically in December 2025 to up to $150,000 for individuals.
Read full SA guide →Building Services Board
WA is unique—the Diploma (CPC50220) is the primary qualification under Set 1 registration, and you need 7 years of experience that includes carrying out or supervising building work. Alternative pathways exist through RPL or Board examinations for experienced builders. WA also requires $50,000 minimum financial capacity for a Building Contractor registration. Registration is only mandatory within the Board's jurisdiction (primarily Perth metro and South West). We offer a Diploma designed for NSW and WA that meets WA Building Services Board requirements.
Read full WA guide →Consumer, Building and Occupational Services (CBOS)
Tasmania offers four sub-classes: Domestic, Low Rise, Medium Rise, and Open. The Certificate IV covers Domestic and Low Rise, while the Diploma is required for Medium Rise. Experience requirements are 2 years with a trade certificate or 4 years without. No exam or interview is required—it's entirely documentation-based. Tasmania mandates 12 CPD points annually and currently has no mandated home warranty insurance, though legislation has been passed.
Read full TAS guide →Building Practitioners Board
The NT is the simplest pathway in Australia. The Certificate IV alone qualifies you for all four registration categories—Residential Restricted, Residential Unrestricted, Commercial Restricted, and Commercial Unrestricted. No Diploma is needed for any category. The differentiator is experience type, not qualification level. You need 3 years of practical experience, $50,000 net tangible assets, and 3 written references. No exam or interview required.
Read full NT guide →Access Canberra
The ACT has five licence classes (A through D plus Owner-Builder). The Certificate IV qualifies you for Class C (Low Rise), and the Diploma for Class B (Medium Rise). You need 2 years of experience with at least 1 year post-qualification. The ACT requires a written exam with an 80% pass mark—one of the highest thresholds in Australia. You get a maximum of 2 attempts per application. A demerit points system applies to licensed builders.
Read full ACT guide →The Certificate IV in Building and Construction (CPC40120) is the most popular entry point for aspiring builders across Australia. It provides the foundational knowledge you need to supervise building sites and apply for a builder's licence in most states and territories.
This qualification covers residential construction, site management, building codes and standards (NCC), quality assurance, structural principles, contract administration, and project management for low-rise buildings. It prepares you for Class 1 & 10 buildings and Class 2–9 Type C structures up to two storeys.
In most states, the Certificate IV is all you need for residential/low-rise building work:
Note: In Victoria, the Diploma is the “prescribed” qualification, but a Certificate IV equivalency pathway exists through the BPC exam process. In WA, the Diploma is the primary pathway under Set 1.
The Diploma of Building and Construction (CPC50220) is the next step for builders who want to take on larger, more complex projects. It qualifies you for medium-rise builder's licences across most of Australia, and is the primary qualification in Victoria and Western Australia.
This qualification covers advanced building technology, contract administration, project management, structural principles for buildings up to three storeys, and construction management for medium-rise buildings. It builds on the Certificate IV knowledge base and prepares you for higher-value projects with greater technical and legal responsibility.
Your ideal qualification depends on where you are now, where you want to go, and which state you're working in. Here's a straightforward guide.
You want to become a site supervisor or get a low-rise builder's licence. You're looking to build residential homes, townhouses, renovations, or small commercial projects. You're based in QLD, NSW, SA, TAS, NT, or ACT and want to start earning sooner with a shorter study commitment. In the Northern Territory, the Certificate IV is all you need for every licence category.
View Certificate IV →You want a medium-rise builder's licence to take on multi-storey and larger commercial projects. You're based in Victoria or Western Australia where the Diploma is the primary or prescribed qualification. Or you want to upgrade your licence in QLD, TAS, or ACT to take on bigger builds and advance into construction management and project leadership roles.
View Diploma →Start with the Certificate IV to get licensed and working sooner, then pathway into the Diploma to upgrade your licence scope. This is the most popular route—earn while you learn and build your career progressively. Credit for overlapping units reduces the total time and cost.
Learn about the pathway →Many successful builders take a staged approach to their qualifications. Start with the Certificate IV, gain experience, then upgrade to the Diploma when you're ready for bigger projects. Each step builds on the last, and credit for completed units carries forward.
Complete CPC40120 in 6–12 months. The training focuses on low-rise construction—residential building codes (Class 1 & 10), structural principles for houses and small commercial buildings, site supervision, contract administration, cost estimation, and WHS management. This is where you build your foundational knowledge for managing residential construction sites.
Training Focus: Low-Rise Construction
19 units — residential building, site supervision, codes & standards
Upgrade to CPC50220 with credit for completed Certificate IV units. The training steps up to medium-rise construction—Type B building codes, structural principles for buildings up to three storeys, advanced contract and project management, contractor selection and management, and costing systems for complex projects. You're learning to manage larger, more technically demanding builds.
Training Focus: Medium-Rise Construction
27 units — multi-storey building, project management, Type B codes
The Advanced Diploma (CPC60220) trains you for high-rise and unrestricted construction—Type A building codes, complex structural systems, large-scale project delivery, and advanced construction management. This is the highest building qualification and prepares you for any project, any size, any complexity.
Training Focus: High-Rise & Unrestricted
If you've been working in construction, you may already have the skills and knowledge covered in these qualifications. Recognition of Prior Learning (RPL) allows you to gain formal recognition for what you already know, potentially completing your qualification in a fraction of the time.
RPL is available for both the Certificate IV and Diploma of Building and Construction. Our team will assess your experience and create a personalised pathway to your qualification. This is particularly valuable for experienced tradespeople and site supervisors who have years of practical knowledge but need the formal paper to apply for their builder's licence.
We've written comprehensive guides for every state and territory covering qualifications, experience requirements, fees, application processes, and more.
Our team can help you find the right qualification based on your experience, career goals, which state you're in, and the type of builder's licence you're working toward. We service all of Australia—get personalised advice today.