Development Application vs Complying Development Certificate

What This Requirement Covers

This article compares two administrative approval pathways used across Australia for building and development work: the statutory Development Application (DA) process and the planning-led Complying Development Certificate (CDC) pathway (sometimes called Complying Development). It explains what each pathway is for, why they exist, who typically uses them, and how they interact with the Building Code of Australia (BCA) and the National Construction Code (NCC).

A DA is the standard local government planning approval for development proposals that require assessment against local environmental plans, development control plans and other planning controls. It exists so local planning authorities can consider the broader planning merits of a proposal - land use, neighbourhood character, heritage, environment and design outcomes - rather than only technical building compliance. A CDC is an accelerated, pre-approved combined planning-and-building pathway available where an applicant’s proposal meets a clear set of predetermined standards. CDCs exist to streamline straightforward, low-risk work by allowing applicants to bypass the full DA process when their proposal exactly matches the prescribed criteria.

Both pathways apply to private property owners, developers, architects, builders and certifiers. The DA route is used for proposals that fall outside pre-approved standards, are novel, or raise planning policy considerations. The CDC route is used for development that clearly meets all required criteria in statutory complying development codes and applicable state legislation, and which can therefore be rapidly assessed and issued by an accredited private certifier or by council, depending on jurisdiction.

Key Requirements

1. Purpose and legal basis
2. Development Application (DA): a planning approval under each State or Territory’s planning and environmental legislation - e.g., Environmental Planning and Assessment Act in New South Wales - requiring assessment against local plans and the relevant planning instrument. A DA often triggers separate building approval (construction certificate) under the building regulatory framework before works commence.
3. Complying Development Certificate (CDC): a single approval combining planning and building consent where the proposal strictly meets the complying development standards set by state planning instruments and where building work must also comply with the NCC/BCA.
4. Assessment tests and thresholds
5. CDC is only available where the proposal satisfies all criteria in the applicable Complying Development Code (for that state or territory). Typical measurable criteria include site coverage, floor area, setbacks, maximum building height, impervious area, private open space, parking spaces, and heritage constraints. Exact numerical thresholds vary by state, local area and the specific CDC code. For example, a CDC for a detached dwelling in one jurisdiction may limit maximum building height to 8.5 m and site coverage to 50%; other jurisdictions may use different numeric limits. Always check the local complying development code for exact values.
6. DA has no single national numeric thresholds because it is assessed against the local planning controls; numeric limits for height, floor space ratio, setbacks and open space are drawn from the local environmental plan or development control plan and are therefore site-specific.
7. Building code compliance
8. Regardless of DA or CDC, building work must comply with the NCC (BCA). Compliance can be by Deemed-to-Satisfy provisions or a Performance Solution as set out in NCC Volume One and Volume Two, Part A2 - Compliance (see "NCC 2022 Volume One - Part A2" and "NCC 2022 Volume Two - A2G1").
9. Certifiers issuing CDCs or construction certificates must ensure design documents demonstrate compliance with the NCC and relevant Australian Standards (for example, AS 1684 for timber framing, AS 4100 for steelwork, AS 3700 for masonry) where those standards are referenced.
10. Who issues approvals and timing
11. DA: Usually determined by council (or planning authority). Statutory timeframes for determination vary by state and by whether the application is lodged as a local or regional DA. Additional consultation and notification periods commonly apply.
12. CDC: Can be issued by a private accredited certifier or council (depending on jurisdiction). CDCs are typically designed to be issued much faster than a DA where the proposal meets criteria.
13. Certifier responsibility and documentation
14. A certifier issuing a CDC or a construction certificate must be satisfied the design documentation and construction details comply with the NCC and any state variations or schedules (see NCC Volume One, A3G1 "State and Territory compliance"), and must check for required technical documentation such as structural calculations, drainage, bushfire assessments and energy efficiency compliance reports.
15. Relevant NCC references and standards
16. NCC Volume One - Part A2 Compliance (A2G1 to A2G2) - compliance pathways and Performance Solutions.
17. NCC Volume Two - introductory compliance provisions explaining state application (A3G1) and the relationship with state variations.
18. Australian Standards commonly referenced for building elements where CDC or construction certificate must demonstrate compliance: AS 1684 (timber framing), AS 4100 (steel structures), AS 3700 (masonry), plus others such as AS/NZS 3500 (plumbing), and energy efficiency standards referenced in the NCC.

Residential vs Commercial

1. Residential (Class 1 and 10) projects
2. Complying development pathways are most commonly available and used for low-rise, detached residential work (Class 1a dwellings, minor ancillary Class 10 structures). Typical CDC eligibility covers single dwellings, secondary dwellings, small-scale alterations and some outbuildings where all numerical criteria (height, setbacks, site coverage, private open space, parking, stormwater) are satisfied. CDC codes generally set explicit numeric thresholds appropriate to residential contexts (e.g., maximum dwelling height in metres, minimum setback in metres, maximum site coverage in percent) and usually incorporate energy efficiency and bushfire attack level (BAL) requirements where applicable.
3. Commercial (Class 2-9) projects
4. Complying development is much more limited for commercial buildings. Medium to large Class 2-9 developments generally require a DA because they raise more complex planning and infrastructure issues - traffic, servicing, waste, fire safety strategies, egress design and amenity. Where CDCs apply to small commercial alterations or low-risk work, the thresholds and requirements are much narrower and CRO/DA may still be required for key aspects. In all commercial cases the design must demonstrate compliance with NCC Volume One fire, egress, structural and service provisions, often requiring specialist reports and Performance Solutions.

Exceptions and Exemptions

1. CDC is not available if any one of the complying development criteria is not met. Partial compliance is not sufficient - the whole proposal must comply with every relevant numerical and subject-matter criterion.
2. Heritage-listed or heritage-constrained sites are commonly excluded from CDC eligibility in state complying development codes; a DA will usually be required.
3. Works in bushfire-prone areas may require additional assessment such as BAL ratings and may be excluded from CDC or require higher-level assessment - check the local CDC code and bushfire mapping.
4. Some local government areas opt out of certain CDC categories or impose additional local environmental controls; where local variations exist the DA pathway may be mandatory.
5. A DA may still require a separate construction certificate or building approval before construction begins; a CDC is itself a combined planning and building approval only where the state code is structured that way - jurisdictions differ in whether a CDC replaces or simply speeds up the need for a building approval.

State and Territory Variations

1. The NCC is national but subject to state and territory variations: see NCC Volume One and Volume Two A3G1 which lists Schedules for each jurisdiction (Schedule 4 ACT, Schedule 5 NSW, Schedule 6 NT, Schedule 7 QLD, Schedule 8 SA, Schedule 9 TAS, Schedule 10 VIC, Schedule 11 WA). These schedules and each state’s planning legislation determine whether and how CDCs operate locally.
2. New South Wales
3. NSW operates a well-developed Complying Development framework (enshrined in state planning instruments). The CDC pathway is closely controlled by NSW complying development codes and lists specific numerical criteria in the State Environmental Planning Policy (Exempt and Complying Development Codes). Many DAs for unique or non-complying designs remain required.
4. Victoria
5. Victoria uses an equivalent consolidated planning and building approach for some simple development types, but many residential and commercial proposals still require planning permits under the Planning and Environment Act. Victoria’s building regulation interacts with the NCC and local planning overlays.
6. Queensland, Western Australia, South Australia, Tasmania, ACT, NT
7. Each state/territory has its own complying development or exempt development provisions, with differing numeric thresholds, local exclusions and implementation details. See the relevant state’s planning legislation and the NCC state schedules for precise variations.
8. Practical note: Always check the local state or council complying development code or planning instrument - state CDC codes contain the exact numeric thresholds and exclusions applicable to that jurisdiction, and the NCC schedules list any state-specific amendments to NCC requirements.

Practical Compliance Tips

1. Check eligibility first - before spending on drawings, run the project through the local complying development checklist or the council planning portal to confirm whether it meets every numeric criterion. If one criterion fails, a DA will be required.
2. Obtain early certifier or planning advice - involve an accredited certifier or town planner early to confirm whether CDC or DA is appropriate and to identify which NCC provisions and Australian Standards will be required in documentation.
3. Provide complete technical documentation - certifiers need full structural calculations, NCC compliance reports (Deemed-to-Satisfy or Performance Solution rationale under NCC Volume One Part A2), BASIX or energy reports where required, stormwater/drainage details, and any BAL or bushfire assessment if the site is mapped as bushfire-prone.
4. Verify state schedules and local codes - consult NCC Volume One and Volume Two for state schedule references (A3G1) and the local complying development code or state planning instrument for exact numeric thresholds and exclusions for CDCs.
5. Do not assume CDC speeds mean lower technical scrutiny - CDCs still require rigorous building code compliance. Key technical mistakes include insufficient structural details to comply with AS 1684/AS 4100/AS 3700, missing waterproofing documentation, and inadequate energy efficiency or ventilation documentation.
6. Check heritage, vegetation and infrastructure overlays early - these local planning controls commonly exclude CDC eligibility and will force a DA if triggered.
7. Keep clear records of approvals - retain the CDC or DA documents, construction certificate (if separate), certifier reports and NCC/AS compliance references so certifiers and inspectors can verify compliance during construction and at final inspection.

References

1. NCC 2022 Volume One - Part A2 Compliance and A3G1 "State and Territory compliance" (see relevant schedules for state variations).
2. NCC 2022 Volume Two - Part A2 Compliance (A2G1 and A2G2) regarding compliance pathways.
3. Relevant Australian Standards as referenced in the NCC: AS 1684 (timber framing), AS 4100 (steel structures), AS 3700 (masonry) and others as applicable to the work.

Note: State-specific complying development codes and local environmental plans contain the precise numeric thresholds, exclusions and procedural details for CDCs and DAs. Because requirements and numeric limits vary by state and local area, always confirm the controlling state schedule and the local complying development instrument for the exact values that apply to your project.