NSW planning resource · $39 planning report

Do I need approval to extend my house in NSW?

NSW has one of the easiest renovation regimes in the country. Many home extensions are Exempt Development — no approval at all — and larger ones can be fast-tracked as Complying Development. Here's what qualifies, when you need a DA, and how to check your property.

NSW homeowners planning an extension, second storey or major renovation — who want to know whether they need approval, and which pathway, before paying for design.

Check what approval you need — $39 Free NSW Spatial Viewer

Three pathways: Exempt, Complying, or DA

NSW sorts home alterations and additions into three pathways under the State Environmental Planning Policy (Exempt and Complying Development Codes) — the 'Codes SEPP'. Minor work that meets the Exempt Development standards needs no approval at all. Larger work that meets the Complying Development standards can be fast-tracked as a Complying Development Certificate (CDC) — issued by council or a private certifier in around 20 days, without a full DA. Anything outside both is a merit development application to council.

Which pathway you're on depends on the scale of the work and, critically, whether your property carries a constraint that switches the fast pathways off.

Exempt Development — minor work meeting the standards needs no approval
Complying Development (CDC) — larger work meeting the standards is fast-tracked (~20 days)
Development Application (DA) — anything outside the codes, assessed on merit
A building/construction certificate is still required for the works
Heritage, conservation areas and some hazard land switch off Exempt/Complying
Standards cover height, setbacks, floor area, site coverage and privacy

When the fast pathways switch off

Exempt and Complying Development aren't available everywhere. A heritage item or a heritage conservation area, an environmentally sensitive area, foreshore land, and certain flood- or bushfire-affected land generally exclude one or both fast pathways — pushing the work back to a merit DA. The Complying Development standards also have hard limits (height, setbacks, floor area, privacy) that, once exceeded, require a DA.

This is why two identical extensions can have completely different approval paths: one straight through as Exempt or Complying Development, the other a full DA because the property sits in a conservation area or flood zone.

Second storeys and bigger additions

A second-storey addition or a substantial ground-floor extension is usually too big for Exempt Development, but often still qualifies as Complying Development if it meets the height, setback, floor-area and privacy standards and the property isn't constrained. That keeps it out of the council DA queue. Where it exceeds the standards or the land is constrained, it becomes a merit DA assessed against the LEP and DCP.

Check your property before you design

Which pathway your extension can use turns on the scale of the work and whether your property carries a heritage, flood or bushfire constraint. Our $39 NSW planning report identifies your zone and the constraints on your land, with a plain-English read on whether your renovation is Exempt, Complying Development or a DA.

Start free with the Property Snapshot to see your constraints in seconds.

Real example

Worked example

A single-storey rear extension meeting the height, setback and floor-area standards on an unconstrained R2 lot can go through as Complying Development — a ~20-day certificate, no council DA. Add a heritage conservation area and the same extension becomes a merit DA.

The statutory basis

Home alterations and additions in NSW are governed by the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 — the General Housing Code and Housing Alterations Code set the Complying Development standards, and the Exempt Development provisions cover minor work. Heritage, conservation-area, foreshore and hazard constraints in the LEP and other SEPPs can exclude the fast pathways and require a development application under the Environmental Planning and Assessment Act 1979. A construction certificate is required separately. Always confirm the constraints for your address.

Codes SEPP 2008

Exempt + Complying Development (Housing/Alterations Codes)

Standard Instrument LEP

Heritage / hazard constraints

Environmental Planning and Assessment Act 1979