If you’re planning to build a new home, duplex, granny flat, extension, renovation or commercial development in NSW, one of the first questions you may have is:
Do I need a Complying Development Certificate (CDC) or a Development Application (DA)?
Both are development approval pathways, but they work differently.
A Complying Development Certificate (CDC) provides a streamlined approval pathway for eligible development that meets predetermined planning and building requirements. A Development Application (DA) involves assessment by the relevant consent authority, commonly the local council, against applicable planning controls and the circumstances of the proposed development.
Understanding which pathway may apply to your project early can help you plan your design, documentation and construction process more effectively.
At StoneyBark Certifiers, we provide professional building certification services across Sydney and NSW, including CDC assessments, Construction Certificates, Principal Certifier services, required inspections and Occupation Certificate assessment.
What Is a Complying Development Certificate (CDC)?
A Complying Development Certificate, commonly known as a CDC, is a streamlined approval pathway for development that meets specific NSW planning and building requirements.
A CDC combines planning and construction approval into a single approval for eligible complying development.
Unlike a Development Application, a CDC can be assessed and determined by either an appropriately registered certifier or the relevant council.
However, the proposed development and property must satisfy the applicable requirements for the relevant complying development pathway.
A registered certifier cannot vary those requirements simply to make a project eligible for a CDC.
What Types of Projects May Be Eligible for a CDC?
Depending on the property, proposed development and applicable planning controls, certain projects may be eligible for complying development, including:
- New dwelling houses
- Secondary dwellings and granny flats
- Alterations and additions
- Home renovations
- Swimming pools
- Garages and other ancillary structures
- Demolition work
- Certain commercial developments
- Certain industrial developments
Importantly, being one of these development types does not automatically mean your project qualifies for a CDC.
The property and proposed design must satisfy the applicable requirements.
What Is a Development Application (DA)?
A Development Application is an application seeking development consent from the relevant consent authority.
For many residential developments, the relevant consent authority will be the local council.
A DA may be required where a proposal cannot proceed as exempt or complying development, or where the proposal requires assessment under the applicable NSW planning framework.
Depending on the development, a DA assessment may consider matters such as:
- Property zoning
- Permissible land use
- Building height
- Floor space
- Building setbacks
- Streetscape and neighbourhood impacts
- Privacy and overlooking
- Heritage considerations
- Bushfire or flooding constraints
- Environmental impacts
- Access and parking
- Landscaping
- Other site-specific planning controls
Unlike complying development, the DA pathway allows the consent authority to assess the proposed development against applicable planning legislation and controls.
CDC vs DA – What’s the Difference?
| Feature | CDC | DA |
| Full name | Complying Development Certificate | Development Application |
| Approval | Combined planning and construction approval | Development/planning approval |
| Who determines it? | Council or appropriately registered certifier | Relevant consent authority |
| Assessment | Must meet prescribed complying development requirements | Assessed against applicable planning requirements |
| Flexibility | Must satisfy applicable CDC standards | Allows assessment of proposals requiring merit assessment |
| Construction Certificate | Generally not separately required for work authorised by the CDC | Generally required before approved building work begins |
| Typical use | Eligible complying development | Projects requiring development consent |
| Construction inspections | Required where applicable | Required where applicable |
A key difference is that a CDC combines planning and construction approval, while a DA provides development consent and will generally need to be followed by a Construction Certificate before building work starts.
Is a CDC Faster Than a DA?
A CDC is designed to provide a streamlined approval pathway for development that meets the applicable complying development requirements.
However, this does not mean every CDC application will be approved quickly.
The assessment process can depend on:
- Whether the property is eligible
- Whether the proposed design complies
- Completeness of architectural documentation
- Engineering information
- Required reports and certificates
- Site constraints
- Whether additional information is required
For an eligible and well-prepared project, the CDC pathway can provide a more streamlined approval process.
The important question should therefore not simply be:
“Which approval is faster?”
Instead, ask:
“Which approval pathway is available and appropriate for my property and proposed development?”
How Do I Know If My Property Is Eligible for a CDC?
CDC eligibility involves more than the type of building you want to construct.
Both the property and the proposed development need to satisfy the applicable requirements.
Depending on the relevant planning provisions, considerations may include:
- Land zoning
- Lot size and dimensions
- Building setbacks
- Building height
- Site coverage
- Landscaping requirements
- Heritage considerations
- Bushfire-prone land
- Flood-related controls
- Biodiversity and environmental constraints
- Easements and infrastructure
- Other planning restrictions
A Section 10.7 Planning Certificate can also provide important information about zoning and certain planning controls affecting a property.
Before designing specifically for the CDC pathway, it can be beneficial to understand these constraints.
When Might You Need a DA Instead of a CDC?
A Development Application may be required where the proposed development cannot satisfy the applicable requirements for complying development or where a complying development pathway is not available.
This may include projects involving:
- Designs outside applicable CDC standards
- Development requiring merit assessment
- Certain heritage constraints
- Complex site conditions
- Certain environmentally constrained land
- Development types not permitted as complying development
- Proposals that cannot satisfy applicable development standards
- More complex residential, commercial or mixed-use developments
Whether a DA is required depends on the particular property, proposed development and applicable planning legislation.
What Happens After a DA Is Approved?
Obtaining DA approval does not generally mean building work can immediately commence.
For building work, the next step is generally to obtain a Construction Certificate (CC).
A Construction Certificate relates to the detailed construction plans and specifications for the approved development and applicable building requirements.
A typical DA pathway may look like:
DA Pathway
Development Application → Development Consent → Construction Certificate → Principal Certifier → Construction & Required Inspections → Occupation Certificate
By comparison:
CDC Pathway
CDC Application → CDC Issued → Principal Certifier → Construction & Required Inspections → Occupation Certificate
This distinction is important when planning the overall approval and construction process.
Do I Need a Construction Certificate After a CDC?
Generally, no separate Construction Certificate is required for building work authorised by the CDC.
This is because a CDC combines planning and construction approval for eligible complying development.
By comparison, where development consent has been obtained through a DA, a Construction Certificate is generally required before the approved building work begins.
What Is a Principal Certifier?
Before applicable building work commences, a Principal Certifier must generally be appointed.
The Principal Certifier performs an independent statutory role during construction.
Depending on the project and appointment, their functions may include:
- Undertaking required critical stage inspections
- Reviewing relevant certification documentation
- Maintaining required certification records
- Identifying certain non-compliances observed during inspections
- Undertaking the required final inspection
- Assessing an Occupation Certificate application
- Issuing an Occupation Certificate where applicable requirements have been satisfied
The Principal Certifier is an independent regulatory professional.
They do not act as the builder, project manager or site supervisor and do not supervise construction work on behalf of the owner.
Who Appoints the Principal Certifier?
The appropriate appointment process is important.
For relevant residential building work, the owner has the right to choose their Principal Certifier. A builder may recommend a certifier, but must not improperly influence the owner’s choice or make the appointment on the owner’s behalf where prohibited.
This independence is an important part of the NSW building certification system.
How StoneyBark Certifiers Can Help
At StoneyBark Certifiers, we provide professional building certification services across Sydney and NSW.
Depending on the project, applicable requirements and our scope of registration, our services may include:
CDC Eligibility & Assessment
We can review relevant project and property information to assess whether the proposed development may be capable of proceeding under an applicable complying development pathway.
Complying Development Certificates
Where engaged to assess a CDC application, we assess the application against the applicable statutory requirements and may issue the CDC where all relevant requirements have been satisfied.
Construction Certificates
Following DA approval, we can assess Construction Certificate applications for eligible developments within our scope.
Principal Certifier Services
StoneyBark Certifiers can act as Principal Certifier for eligible developments within our scope of registration.
Critical Stage Inspections
Where appointed as Principal Certifier, we undertake required inspections at applicable stages of construction.
Occupation Certificate Assessment
At completion, we can assess an Occupation Certificate application and determine whether an OC can be issued where the applicable requirements have been satisfied.
What Are the Benefits of a CDC?
For development that qualifies, a CDC can provide several benefits:
- Streamlined approval pathway
- Combined planning and construction approval
- Predetermined development standards
- No separate Construction Certificate for work authorised by the CDC
- Clear progression from approval into the construction certification process
However, these benefits only apply where the property and proposed development satisfy the applicable requirements.
A CDC is not a shortcut around NSW planning or building requirements.
It is an alternative approval pathway specifically designed for eligible complying development.
Why Choose StoneyBark Certifiers?
Building certification is an important regulatory process, and choosing an experienced certifier can help make the requirements easier to understand.
At StoneyBark Certifiers, we focus on:
- Professional NSW building certification
- Clear and responsive communication
- Transparent documentation requirements
- Coordinated inspection scheduling
- Practical understanding of residential and commercial development
- Independent certification in accordance with applicable requirements
- Professional service throughout the relevant certification stages
We work with homeowners, builders, architects, designers, developers and other industry professionals across Sydney and NSW.
Frequently Asked Questions
Is a CDC Better Than a DA?
Neither pathway is automatically better.
A CDC can provide a streamlined pathway where the property and proposed development meet the applicable complying development requirements.
Where the development does not qualify for complying development, a DA or another appropriate approval pathway may be required.
Is a CDC Faster Than a DA?
A CDC is designed as a streamlined approval pathway for eligible complying development.
Actual assessment time will depend on factors such as the property, proposed development, documentation and whether all applicable requirements have been satisfied.
Can StoneyBark Certifiers Check if My Project May Qualify for a CDC?
Yes. StoneyBark Certifiers can review relevant project information and documentation to assess potential CDC eligibility within the scope of our certification services.
Can a Private Certifier Approve a DA?
A DA is determined by the relevant consent authority.
A registered certifier can perform certification functions within their registration, which may include determining eligible CDC and Construction Certificate applications.
What Happens After My DA Is Approved?
Where building work is proposed under the development consent, a Construction Certificate will generally be required before construction begins.
A Principal Certifier must also generally be appointed before applicable building work commences.
Do I Need a Construction Certificate After a CDC?
Generally, no separate Construction Certificate is required for building work authorised by the CDC because the CDC incorporates both planning and construction approval.
Can Every Property Use the CDC Pathway?
No.
The property and proposed development must meet all applicable requirements for the relevant complying development pathway.
Can a Certifier Approve a CDC That Doesn’t Meet the Requirements?
No.
Registered certifiers perform independent statutory functions and can only issue a CDC where the applicable legislative requirements have been satisfied.
Do I Still Need Building Inspections With a CDC?
Yes. Required critical stage inspections still apply where applicable.
The Principal Certifier should advise which inspections are required for the particular project.
What Happens at the End of Construction?
Depending on the development, an Occupation Certificate may be required before a new building can be occupied or used.
The Occupation Certificate application is assessed following completion of the relevant building work, inspections and required documentation.
Not Sure Whether You Need a CDC or DA?
If you’re planning a new home, duplex, granny flat, extension, renovation or commercial project in Sydney or NSW, understanding your potential approval pathway early can help you make informed decisions about your design and documentation.
StoneyBark Certifiers can assist with certification requirements for eligible developments and help you understand the next steps relevant to your project.
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The information provided in this article is general information only and does not constitute legal, planning, engineering or other professional advice. Approval and certification requirements vary depending on the property, proposed development and applicable legislation. Obtain advice relevant to your individual project before proceeding.
