Development approvals for NSW residential building work: DAs, CDCs and exempt development

Three approval pathways

Residential building work in NSW requires development approval under the Environmental Planning and Assessment Act 1979 (NSW). The Act sets three pathways for that approval, scaling with the complexity and impact of the work.

Exempt development is small, low-impact work that meets the conditions in the relevant Code and requires no approval at all. The builder can start work as soon as the conditions are satisfied.

Complying development is work that meets predetermined standards in the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 (commonly called the Codes SEPP). An accredited certifier (private or council) issues a Complying Development Certificate (CDC) confirming the work meets the standards. CDCs are faster and cheaper than DAs because the standards are mechanical, not discretionary.

Development requiring consent is everything else. The builder lodges a development application (DA) with the council (or in some cases an independent planning panel). The council assesses the application against the local environmental plan (LEP), the relevant SEPPs, council development control plans and the public interest. DAs are slower and more uncertain because the assessment is discretionary.

Development applications

A DA is required for residential work that does not fit either the exempt or complying development pathways. New dwellings on irregular sites, extensions that affect heritage controls, developments in flood or bushfire prone areas and most subdivisions or torrens title arrangements typically need a DA.

The applicant (homeowner, builder or a designer acting on their behalf) lodges the DA through the NSW Planning Portal. Required documents include site survey, architectural plans, statement of environmental effects, BASIX certificate for energy and water efficiency and any specialist reports required for the site (heritage, geotechnical, bushfire, flood, contamination).

The council assesses the DA against the relevant planning instruments. Public exhibition is mandatory for most DAs. Adjoining owners and the public can object. The council then issues development consent (subject to conditions), defers the decision or refuses it.

A separate construction certificate (CC) is required before work can start. The CC confirms the construction documents meet the NCC and the conditions of development consent. The CC can be issued by the council or a private certifier.

Timeline: a straightforward DA takes 6 to 12 weeks. A complex DA with multiple referrals and a panel determination can take 6 months or longer.

Complying development certificates

A CDC is the fast-track pathway. The work must meet the standards in the relevant code of the Codes SEPP (the General Housing Code, the Rural Housing Code, the Greenfield Housing Code, the Commercial and Industrial Code and others). Common examples that fit the CDC pathway include a single-storey new house on a standard residential lot, a single-storey alteration or addition within prescribed setbacks and a swimming pool meeting safety standards.

The applicant lodges through the NSW Planning Portal. An accredited certifier (private or council) reviews the application against the Code standards. If the work meets all standards, the certifier issues the CDC. No public consultation is required.

Timeline: a CDC for a standard residential build typically takes 2 to 4 weeks from lodgement.

The CDC issued by the certifier acts as both the planning approval and the construction certificate (no separate CC is required). The certifier remains the regulator throughout construction, conducting inspections and issuing the occupation certificate at completion.

Exempt development

Exempt development is the smallest pathway. The relevant Code of the Codes SEPP lists specific types of work that require no approval, subject to the work meeting the listed conditions (size, location, materials, setbacks). Common examples include:

• Internal alterations that do not change the building structural elements
• Small garden sheds within size, height and setback limits
• Decks below a height threshold and within setback limits
• Replacement of like-for-like fixtures (hot water systems, air conditioning units)

The builder must self-certify that the work meets the conditions. There is no document issued by an authority. Records of compliance with the conditions should be kept in case of later dispute. If the work later turns out not to meet the conditions, the work is unauthorised and exposes the owner and builder to compliance action.

The accredited certifier

The accredited certifier is the key figure under the EP&A Act for both CDC and DA pathways. Private certifiers are individuals accredited under NSW law and overseen by the NSW Department of Customer Service through the relevant accreditation framework.

Under a CDC pathway, the certifier reviews the application, issues the CDC, conducts mandatory inspections during construction and issues the occupation certificate. Under a DA pathway, the certifier issues the construction certificate after development consent is granted by the council, conducts mandatory inspections and issues the occupation certificate.

The certifier carries legal responsibility for the assessment. Wrong assessments expose the certifier to professional consequences and (in some cases) personal liability.

Which pathway to pick

For a standard NSW residential project, the choice of pathway is usually driven by what the local planning controls permit, not by builder preference.

Builders and homeowners should run the proposed work through the Codes SEPP first. If the work fits the General Housing Code (or the relevant code for the site), the CDC pathway is faster, cheaper and more certain. If the work is excluded from the Code (heritage, bushfire-prone land beyond a certain BAL rating, flood prone, certain zones), the DA pathway is the only option.

The Codes SEPP includes exclusions for site conditions that the Code cannot adequately assess. Sloping land beyond certain gradients, sites with specific environmental constraints, conservation areas and heritage items are commonly excluded. A pre-design check of the site eligibility for the CDC pathway is a useful first step.

Practical implications

For NSW residential builders, three habits keep the approvals position clean.

Check the site eligibility for CDC against the Codes SEPP before designing. Designing to the Code mandatory standards rather than against them keeps the CDC option open and avoids costly redesigns if the CDC pathway is preferred.

Engage the certifier early. The certifier view on whether a specific design meets the Code standards is the determinative one. Getting their preliminary view before lodgement saves time and rework.

Document exempt development compliance. Where work is undertaken as exempt development, keep photographs, measurements and a written record of how the work meets the relevant Code conditions. If a council compliance officer later queries the work, the documentation is the answer.

Related entries

NCC compliance applies regardless of approval pathway and is covered in the ncc-compliance-residential-builders entry. Statutory warranties under the Home Building Act 1989 apply to work done under any of the three pathways (statutory-warranties entry). HBCF and the residential building contract framework apply once the approval is in place and work begins (hbcf-insurance-requirements, choosing-residential-building-contract).