Heritage overlays and heritage conservation areas: what builders need to know

TL;DR

Heritage overlays and heritage conservation areas add a mandatory approval layer on top of the standard DA or planning permit. In NSW a state-listed heritage item needs a Heritage Council Section 60 approval (assessed in 40 to 60 days) before works proceed; local heritage items need a council DA with a Statement of Heritage Impact. In VIC, a Heritage Overlay (HO) applied via Clause 43.01 of the planning scheme triggers a council planning permit for most external works and demolition. In QLD, a Queensland Heritage Register listing makes the works assessable development under the Planning Act 2016, and the Queensland Heritage Council assesses the application. On any of these sites, CDC and complying development fast-tracks are usually off the table. Allow 3 to 6+ months for heritage consent on a complex job. If you find an unregistered relic mid-dig, stop work in the affected area and notify the relevant authority in writing before resuming.

In plain English

Two distinct heritage layers exist in every state:

State heritage registers (Heritage NSW, Heritage Victoria, Queensland Heritage Council): a statutory list of places significant to the whole state. Works on these places require direct state authority approval before or alongside a council DA.
Local heritage listings and heritage conservation areas (HCAs): applied via a council’s LEP (in NSW), a planning scheme Heritage Overlay (in VIC), or a local overlay (in QLD). Managed at council level; works require a DA or planning permit from council.

In VIC, the term “Heritage Overlay” refers specifically to the Clause 43.01 planning scheme control. In NSW the equivalent local control is a heritage schedule in the LEP or a defined HCA.

What it requires

NSW: state heritage items (State Heritage Register)

The NSW State Heritage Register is maintained by Heritage NSW under the Heritage Act 1977 (verified 2026-05-09, heritage.nsw.gov.au). Works with a moderate or greater impact on a listed item require a Section 60 works approval from the Heritage Council of NSW: 40-day standard assessment, 60 days if publicly advertised. Lodge via the Heritage Management System online. A Statement of Heritage Impact (SoHI) is required; a Conservation Management Plan (CMP) must be submitted if one exists.

Minor works may qualify for a fast-track application or a standard exemption — check the exemptions list before lodging (verified 2026-05-09, environment.nsw.gov.au).

Where the same works also need a council DA, the DA becomes integrated development: council determines it but the Heritage Council of NSW is a concurrence authority. The DA cannot be approved without Heritage Council concurrence (verified 2026-05-09, environment.nsw.gov.au).

NSW: local heritage items and heritage conservation areas

Local heritage items and heritage conservation areas (HCAs) are listed in a council’s LEP (typically Schedule 5). Most external alterations, new buildings, and demolition require a DA to council with a Statement of Heritage Impact (verified 2026-05-09, ryde.nsw.gov.au). Routine maintenance (like-for-like repairs, repainting in the same colour) is usually exempt; check the council DCP. CDC fast-tracks are not available for heritage-listed properties.

Work type	Approval required
External alterations, new additions	DA with Statement of Heritage Impact
Demolition of a contributing structure	DA, likely refused or heavily conditioned
Routine maintenance (same appearance, like-for-like)	Usually exempt; check council DCP
Structural internal alterations	Usually DA required
Non-structural internal works (floor coverings, kitchen fitout)	Usually exempt

VIC: Heritage Overlay (Clause 43.01)

A Heritage Overlay (HO) is applied by a council’s planning scheme under Clause 43.01 of the Victoria Planning Provisions (VPP). State-significant places may also sit on the Victorian Heritage Register, administered by Heritage Victoria under the Heritage Act 2017, which is a separate and more demanding approval layer.

A planning permit from council is required for: demolition; external alterations; new buildings or structures (sheds, fences, pergolas); tree removal (if the schedule specifies); and some internal works (if specified in the schedule). Routine maintenance that does not change external appearance does not require a permit (verified 2026-05-09, yarracity.vic.gov.au).

Applications require a Heritage Impact Statement (HIS). Complex works often require a Conservation Management Plan (CMP) from a qualified heritage consultant; a CMP typically has a 5-to-10-year life before review (verified 2026-05-09, heritage.vic.gov.au).

Properties on the Victorian Heritage Register additionally need a heritage permit from Heritage Victoria under the Heritage Act 2017. Heritage Victoria advertises applications publicly for 14 days unless satisfied works will not harm the place (verified 2026-05-09, heritage.vic.gov.au).

Works	Permit required
Demolition	Council planning permit
External alterations	Council planning permit
Routine maintenance (same appearance)	No permit required
Internal alterations (not in HO schedule)	No permit required
Victorian Heritage Register place	Heritage Victoria permit plus council permit

QLD: Queensland Heritage Register

Works affecting a Queensland Heritage Register place are assessable development under the Planning Act 2016 and require development approval assessed by the Queensland Heritage Council under the Queensland Heritage Act 1992 (verified 2026-05-09, legislation.qld.gov.au). For minor works, an exemption certificate from the Queensland Heritage Council may be available, but not for major changes or complex developments (verified 2026-05-09, planning.townsville.qld.gov.au).

Conservation Management Plans

A CMP is a heritage management document that sets out a place’s significance and policies for managing change. It does not authorise works on its own, but it conditions approvals. In NSW, the Heritage Council no longer formally endorses CMPs (changed in 2019), but continues to recommend preparing them and uses them when submitted (verified 2026-05-09, environment.nsw.gov.au). In VIC, a CMP is expected for complex Heritage Overlay applications and typically required for works on Victorian Heritage Register places. CMPs have a useful life of 5 to 10 years.

What it doesn’t cover

State heritage overlays and listings do not cover Aboriginal cultural heritage (separate legislation in each state), World Heritage or National Heritage listings under the federal EPBC Act, or unlisted relics encountered during construction (see below).

Practical implications

Check the heritage status of any site before commissioning a design. In NSW, search the State Heritage Register at heritage.nsw.gov.au; check the council LEP for local listings and HCAs. In VIC, search the planning scheme heritage schedule at planning.vic.gov.au/property.

Heritage approval adds time on top of the standard DA or planning permit:

Approval type	Typical additional time
NSW Section 60 (standard)	40 to 60 days, on top of any DA
NSW local heritage DA with heritage referral	4 to 8 weeks extra for report and council assessment
VIC Heritage Overlay planning permit	60 to 90 days (longer if objections)
VIC Heritage Victoria permit (state register)	4 to 6 months for complex works
QLD Heritage Register development approval	20+ business days plus Heritage Council assessment

Engage a heritage consultant before lodging. A well-prepared Statement of Heritage Impact or CMP that directly addresses significance will move faster than a thin one that generates RFIs.

What happens if you discover an unmapped heritage item mid-build

Stop work in the affected area immediately.

NSW: Under Section 146 of the Heritage Act 1977, you must notify the Heritage Council of NSW within a reasonable time via the Heritage Management System (HMS) online portal. Do not resume work until you receive a formal written response. The Heritage Council will advise whether you can continue or whether a Section 60 or Section 140 excavation permit is required (verified 2026-05-09, environment.nsw.gov.au).

VIC: Under the Heritage Act 2017, all works must cease and Heritage Victoria must be notified as soon as practicable. If previously hidden significant built fabric is uncovered, works affecting those elements must also stop. Works may only resume once Heritage Victoria has responded and any required consent or permit exemption is in place (verified 2026-05-09, heritage.vic.gov.au).

Practical steps on discovery

Stop excavation in the immediate area.
Photograph and document the discovery (location, depth, what was found).
Notify the relevant state authority in writing (Heritage Management System in NSW; Heritage Victoria by phone and email in VIC).
Do not disturb or remove any artefacts pending advice.
Notify your client in writing; document everything for site records.
Await written clearance before resuming work in the affected area.

The stop-work obligation applies even if the site is not on any register. All unmapped relics are protected under state heritage legislation.

What can go wrong

Discovery after design is locked: a heritage overlay found late requires redesign of setbacks, materials, and scale. A pre-DA check or Section 10.7 certificate search takes hours; redesign takes weeks and costs fees.
Missing the integrated development trigger (NSW): lodging a DA on a state heritage item without flagging it for Heritage Council concurrence will bounce. Council returns the application as invalid.
Assuming CDC is available: CDC and complying development are not available on heritage-listed properties in NSW. Assuming a CDC pathway will run adds weeks when the lodgement is rejected.
Proceeding after a relic find without clearance: resuming excavation after an unexpected relic discovery without Heritage NSW or Heritage Victoria written clearance is a breach of the Heritage Act in each state and can result in enforcement action and stop-work orders.
Heritage overlap not on Section 10.7 (NSW): the Section 10.7 certificate discloses state and local listings but not every interim heritage order or the boundaries of all HCAs; a heritage consultant’s desktop review of the LEP heritage schedule is more reliable.

References

Heritage NSW, State Heritage Register, heritage.nsw.gov.au (verified 2026-05-09)
Heritage Act 1977 (NSW), s.60 and s.146, legislation.nsw.gov.au (verified 2026-05-09)
Heritage NSW, Section 60 works application, environment.nsw.gov.au (verified 2026-05-09)
Heritage NSW, Notify discovery of a relic (s.146), environment.nsw.gov.au (verified 2026-05-09)
Heritage NSW, Conservation management plans, environment.nsw.gov.au (verified 2026-05-09)
Heritage Victoria, Permits and consents, heritage.vic.gov.au (verified 2026-05-09)
Heritage Victoria, Historical archaeology, heritage.vic.gov.au (verified 2026-05-09)
Victoria Planning Provisions, Clause 43.01 Heritage Overlay, planning.vic.gov.au (verified 2026-05-09)
Queensland Heritage Act 1992 (Qld), current as at 22 July 2024, legislation.qld.gov.au (verified 2026-05-09)