DA vs CDC vs CC vs BIC: pick the right pathway for your residential project

TL;DR

In NSW, four approval types cover almost every residential scenario: DA (merit-assessed planning), CDC (code-compliant fast-track), CC (building approval that follows a DA), and BIC (retrospective certificate for existing unauthorised works). DA and CDC are alternative planning pathways; CC is the building-works approval that comes after a DA; BIC is a separate instrument for legitimising work that already happened without consent.

The costliest trap: assuming your Class 1a project is automatically CDC-eligible, pricing the client timeline at 20 days, then discovering mid-process that the lot has a bush fire, flood, or heritage control that kicks you back to DA. The eligibility check comes before the clock starts. Do it first.

What this article is for

Four NSW approval terms get conflated constantly: DA, CDC, CC, BIC. They are not alternatives in the same tier. DA and CDC compete at the planning-approval level. CC sits downstream of a DA. BIC is an entirely separate instrument for retrospective situations.

This article maps all four, explains when each applies, shows what goes wrong, and then translates the NSW terminology into each state’s equivalent for VIC, QLD, WA, and SA.

The four NSW pathways at a glance

Pathway	Full name	Purpose	Decision-maker	Typical timeframe	Indicative cost
DA	Development Application	Merit-assessed planning approval	Council or panel	4-6 months (residential)	$1,000-5,000+ application fee
CDC	Complying Development Certificate	Code-compliant combined planning + building approval	Council OR accredited certifier	20 days (10 days Pattern Book)	$800-2,500 cert fee + $200-600 application fee
CC	Construction Certificate	Building-works approval following a DA (before construction starts)	Council OR accredited certifier	1-4 weeks	$800-3,000 cert fee
BIC	Building Information Certificate	Retrospective certificate for existing (possibly unauthorised) works	Council only	6-12 weeks + possible remediation	$500-3,500 depending on council

Costs are indicative, ex-GST, and vary by council and certifier. Always confirm with the issuing authority before quoting a client.

DA: merit-assessed approval

A Development Application is the default planning pathway for any residential work that does not qualify for exempt or complying development. The consent authority (usually council, sometimes a regional panel or the department for state-significant projects) assesses the proposal on its merits against the relevant environmental planning instruments: the LEP, DCP, any applicable SEPPs, and the EP&A Act 1979.

When you need a DA:

The lot has a constraint (bush fire, flood, heritage, acid sulfate soils, foreshore) that disqualifies the CDC pathway.
The design departs from the prescribed standards in the Housing Code or Low-Rise Housing Diversity Code.
The development category is not listed as complying development in any applicable SEPP.
The LEP has specifically excluded complying development on the lot.

Timeframes: The EP&A Regulation sets a 40-day determination period for local DAs, but in practice most residential DAs run longer once referrals, additional information requests, and notification periods are included. Four to six months is a reasonable residential median in metro NSW. Complex sites or neighbour objections stretch well beyond that.

After approval: A DA consent does not authorise construction. You must obtain a Construction Certificate before breaking ground. See the CC section below.

Statutory basis: Part 4, Division 4.1 of the Environmental Planning and Assessment Act 1979 (NSW).

CDC: complying development fast-track

A Complying Development Certificate is a combined planning and construction approval for development that meets prescribed standards. Council or an accredited private certifier can issue a CDC. This is the key difference from a DA: no council required if the certifier is satisfied.

What a CDC does: Replaces both the DA (planning) and the Construction Certificate (building works) in a single instrument. When you have a CDC, you can proceed directly to construction without a separate CC.

Timeframes:

Standard CDC: must be determined within 20 business days of a valid application.
Pattern Book CDC (from 30 July 2025): 10 business days, provided at least 7 days prior notice has been given to neighbours. Pattern Book designs cover dual occupancy, multi-dwelling housing, terraces, and manor houses.

Key eligibility gatekeepers: The lot must not be subject to a constraint that disqualifies complying development. The State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 (Codes SEPP) and the Housing SEPP 2021 both list exclusions. Common ones that catch builders out: bush fire prone land (certain categories), flood planning areas (above the flood planning level), certain heritage listings, acid sulfate soil risk areas, and lots not connected to reticulated sewer.

Who uses it: Builders and owner-builders on straightforward Class 1a residential projects in R1, R2, R3, and RU5 zones. Also used for Class 10 structures (carports, sheds, pools) where the standards are met.

Statutory basis: Part 4, Division 4.2 of the EP&A Act 1979; Codes SEPP 2008; Housing SEPP 2021.

For a full step-by-step on the NSW CDC process, see NSW Complying Development Certificate (CDC): step-by-step.

CC: Construction Certificate (post-DA, pre-build)

A Construction Certificate is the building-works approval that must be obtained after a DA is granted and before construction commences. It confirms that the detailed plans and specifications comply with the development consent conditions and the Building Code of Australia (NCC).

A CC is not a planning approval. It does not assess merits or land-use. It is a technical check: do the construction documents comply with the NCC and with the specific conditions attached to the DA consent?

Who issues a CC: Council or an accredited certifier (private). Many builders default to a private certifier for speed. The private certifier becomes the principal certifier for the project once the CC is issued.

What triggers the CC: Every DA-approved project needs a CC before work starts. There is no alternative for DA-approved development: you cannot go from DA consent to construction without a CC.

What a CC is not: A CC is not the same as an Occupation Certificate. The OC comes at the end of construction, once the principal certifier is satisfied the work is complete and compliant.

Timeframes: Private certifiers typically turn around a residential CC in 1-4 weeks once complete documentation is submitted. Council is slower, often 4-8 weeks.

Statutory basis: Part 6, Division 6.3 of the EP&A Act 1979.

BIC: Building Information Certificate (retrospective)

A Building Information Certificate is a retrospective certificate that prevents council from taking certain enforcement action against an existing building or building works. It does not grant development consent and it does not authorise ongoing use. It is issued by council only (not by a private certifier) under s6.25 of the EP&A Act 1979.

When a BIC is used:

Unauthorised work has been done (extensions, structures, internal alterations) without a DA or CDC, and the works cannot be retrospectively consented through the ordinary process.
A property is being sold and the buyer wants certainty that council will not order demolition or remediation of existing structures for a defined period.
A building has an informal history (older additions, conversions) where the original paperwork is lost.

What a BIC does: From the date of issue, council is prevented for 7 years from making an order under the EP&A Act or Local Government Act 1993 requiring the building to be repaired, demolished, altered, added to, or rebuilt. It also prevents council taking civil proceedings related to any encroachment onto council-controlled land.

What a BIC does not do:

It does not authorise the use of the building. Separate development consent is still required for the ongoing use if the use is not otherwise permissible.
It cannot be used to obtain an Occupation Certificate for the unauthorised work. The BIC pathway and the OC pathway are separate; if you need an OC, the works must go through a proper consent or construction certificate process.
It does not freeze council from acting on non-structural issues such as fire safety orders, swimming pool barriers, or stormwater compliance.
Some non-compliant works cannot be retrospectively legitimised at all. If council determines the works cannot be issued a BIC (because they are unsafe or incapable of meeting the relevant standards even after remediation), the council can refuse the certificate.

Cost: Varies significantly by council. A $40 lodgement fee applies to file through the NSW Planning Portal (EP&A Regulation 2021, cl. 268(2)). Council assessment fees on top of this range from approximately $500 (smaller councils, simple structures) to $2,000-3,500 for larger or more complex buildings.

Statutory basis: Part 6, Division 6.7, s6.25 of the EP&A Act 1979.

Cross-state equivalents

The NSW terms DA, CDC, CC, and BIC are NSW-specific. Other states have equivalent concepts under different names.

NSW term	VIC equivalent	QLD equivalent	WA equivalent	SA equivalent
DA	Planning permit (Planning and Environment Act 1987)	Development Application, impact assessable or code assessable (Planning Act 2016)	Development Application to council or DAP	Development Application, Performance Assessed (Planning, Development and Infrastructure Act 2016)
CDC	Permit-exempt (single dwellings on lots >300m2 post-VC282, Sept 2025); VicSmart for simpler permitted works (10 business days)	Accepted development (straight to building approval, no planning DA); QDC MP 1.1 or MP 1.2	Deemed-to-Comply check under R-Codes Volume 1, then straight to building permit (no separate planning DA)	Code Assessed Deemed-to-Satisfy (P&D Code; decided within 5 business days; mandatory approval if compliant)
CC	Building permit (Building Act 1993; always required even when planning permit is exempt)	Building approval (Building Act 1975; required separately from the development approval)	Building permit (Building Act 2011; required separately from planning, even for Deemed-to-Comply)	Building consent (Development Act or Building Rules Assessment under PDI Act; issued post-planning approval)
BIC	No direct equivalent; retrospective building permit possible in some councils; heritage exemption permits available	Building approval after-the-fact (limited; generally requires full compliance with QDC)	No direct equivalent; retrospective building permit possible in limited circumstances	No direct equivalent; non-compliant works typically require performance assessment or enforcement action

Key patterns:

Every state separates planning approval from building/construction approval. NSW’s CDC is unusual in bundling both into one certificate. Everywhere else, even the fast-track pathways require a separate building permit.
WA’s Deemed-to-Comply check is the closest structural equivalent to the NSW CDC eligibility check, but the building permit is always a separate step.
SA’s Code Assessed Deemed-to-Satisfy is the fastest residential planning pathway nationally: 5 business days, mandatory approval if the standards are met, no public notification.
No state has a true equivalent to the NSW BIC. VIC, QLD, and WA may allow retrospective building permits in limited circumstances, but the protection they provide differs.

The decision tree

Work through these questions in order for any NSW residential project.

Step 1: Is construction starting from scratch, or has it already happened?

Already happened without approval: go to BIC (if the works are existing and you want retrospective coverage) or investigate whether a retrospective DA/CDC is possible (rare, limited circumstances).
Starting fresh: continue to Step 2.

Step 2: Is the development exempt?

If the works are minor (fences within height limits, small sheds, certain repairs): exempt development requires no approval at all. Check the Codes SEPP.
If not exempt: continue to Step 3.

Step 3: Does the lot qualify for complying development?

Check the Codes SEPP exclusion list. If any of these apply, the CDC pathway is not available:

Bush fire prone land (risk category applies to the lot)
Flood planning area (land below the flood planning level)
Heritage listed item or conservation area
Acid sulfate soil Class 1 or 2
Not connected to reticulated sewer

Yes, lot qualifies: Does the design comply with the Housing Code (or Low-Rise Housing Diversity Code, or Pattern Book Code) standards in full? If yes: CDC pathway. 20 days (10 days for Pattern Book). Issued by council or accredited certifier. No CC required.

No, lot does not qualify, or design does not comply with standards: DA pathway. After DA consent: you need a Construction Certificate before construction starts. Appoint your principal certifier, apply for the CC, then build.

Step 4: Post-construction.

After construction: apply for an Occupation Certificate through the principal certifier. The OC is the final sign-off that the building is fit for occupation.

What can go wrong

Starting a CDC and getting kicked back to DA. If the eligibility check reveals a disqualifying constraint after you have committed to a timeline, the client’s program collapses. Run the lot check before you scope the project, not after the first pre-lodgement meeting.

Assuming a CC is not needed because you have DA consent. DA consent authorises the use and development of land. It does not authorise construction works. Without a CC, no work can start lawfully. Builders who start on site after DA but before CC put their licence at risk.

Treating a BIC as an OC substitute. A BIC prevents council enforcement action for 7 years. It does not make the building lawfully occupiable if it lacks an OC. If an unauthorised extension was done to a habitable room and the buyer later wants to sell, the absence of an OC on those works will surface in any competent s10.7 search. Fix the underlying consent issue; do not rely on the BIC as a permanent solution.

Confusing NCC classifications with planning categories. Class 1a, Class 1b, Class 2 are NCC terms for construction. Planning instruments use different language: dwelling house, dual occupancy, residential flat building, multi-dwelling housing. Both systems run in parallel and both must be satisfied. A building that is Class 1a under the NCC still needs to qualify as “complying development” under the relevant planning instrument for the CDC pathway to apply.

Quoting state-specific terms across borders. CDC does not exist in VIC or QLD. “Construction Certificate” is NSW terminology; the equivalent in every other state is a building permit. If you are scoping a job in WA after working in NSW, mentally translate before quoting process to the client.

For the full NSW CDC eligibility checklist, see Class 1a CDC checklist NSW.
For the DA lodgement process in NSW, see Submitting a DA in NSW, step-by-step.
For private vs council certifiers (who issues the CDC and CC), see Private vs council certifiers.
For the cross-state planning hierarchy that underpins all of this, see Australian planning scheme structure.

References

Environmental Planning and Assessment Act 1979 (NSW), Part 4 (development assessment) and Part 6 (post-consent and completion), via legislation.nsw.gov.au (verified 2026-05-23).
State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 (Codes SEPP), via legislation.nsw.gov.au (verified 2026-05-23).
NSW Planning Portal, Complying Development overview, via planning.nsw.gov.au (verified 2026-05-23).
NSW Planning Portal, Stage 5 Construction Certificate, via planning.nsw.gov.au (verified 2026-05-23).
EP&A Act 1979 s6.25 (Building Information Certificate), summarised via BAL Lawyers (verified 2026-05-23).
EP&A Regulation 2021, cl. 268(2) (BIC lodgement fee $40), via NSW Planning Portal service fees (verified 2026-05-23).
Pattern Book Development Code 2025 and 10-day CDC pathway, via Lindsay Taylor Lawyers (verified 2026-05-23).
VIC Amendment VC282 (8 September 2025), Clause 54 VPP single dwelling permit-exempt and building permit requirements, via Victorian Building Authority (verified 2026-05-23).
Planning and Environment Act 1987 (VIC), via legislation.vic.gov.au (verified 2026-05-23).
Planning Act 2016 (QLD), development assessment categories, via planning.qld.gov.au (verified 2026-05-23).
WA R-Codes Volume 1, Deemed-to-Comply check process, via wanneroo.wa.gov.au (verified 2026-05-23).
SA Planning and Design Code assessment pathways (Deemed-to-Satisfy, 5 business days), via plan.sa.gov.au (verified 2026-05-23).