How long does a knockdown rebuild take in Australia?

Knockdown rebuild timeframes vary, but a common range is around 12-18 months total: 2-4 months for approvals, 1-2 weeks for demolition, and 8-12 months for construction. Complex sites or custom designs may take longer. Factor in time for planning, selections, and finding temporary accommodation.

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Knockdown Rebuild

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Address: Adelaide, SA, 5000, AU
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By George Giannakakis · M.Arch · RLA300580 · HIA Industry Judge

Last reviewed: 1 March 2026 · How we research

Working on real numbers? Read the independent Adelaide Build Cost Report 2026 for current per-sqm rates, site-cost bands and the hidden line items most quotes miss.

Knockdown Rebuild explained in detail

Demolishing an existing home and building a new one on the same block. Often more cost-effective than major renovations, and allows you to stay in a location you love with a brand new home designed to your needs. Popular in established suburbs with good infrastructure but ageing housing stock.

Related Terms

Frequently Asked Questions

Common questions about knockdown rebuild

It depends on the extent of renovation needed. As a rule of thumb, if renovation costs exceed 50-60% of a new build, knockdown rebuild may be better value. KDR gives you a new home with warranties, modern design, and energy efficiency. However, renovation may preserve character and avoid demolition/DA costs.

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Helpful Guides

Adelaide Build Cost Report 2026

Per-sqm rates, site costs & ranges

Home Builders Adelaide

How to choose the right builder

First Home Buyer Guide

Grants, costs & complete process

House & Land Packages

The complete Adelaide guide

More Terms in Design

Building Drawings CAD (Computer-Aided Drawings)Design Drawings Elevations Plans Ranch Style Schedules Sections

Popular Building Terms

Site CostsThe hidden costs of building a home

Provisional SumsWhat builders don't always tell you

EavesWhy they matter in Australian homes

Brick VeneerAustralia's most common construction

Practical CompletionWhat happens at handover

Build TimelinesHow long does it take to build?

Authoritative Sources

Verify against the binding rules in your state

BuildPilot is an independent home-build CoPilot - we publish guidance, we don't hold a building licence. Every Australian residential build must comply with the National Construction Code plus state-specific Acts and consumer-protection law. The authorities below are the primary sources of truth for the rules that actually apply to your project.

National

National Construction Code (NCC)

Australian Building Codes Board (ABCB)

The primary national set of technical building standards that every Australian build must comply with. Volume 2 covers Class 1 & 10 buildings (most homes).

Australian Standards (AS / AS-NZS)

Standards Australia

Specific material, product and method standards (e.g. AS 3700 masonry, AS 1684 timber framing) referenced by the NCC.

Housing Industry Association (HIA)

HIA

National peak body for residential builders. Publishes the most widely used home-building contracts and consumer guidance.

Master Builders Australia (MBA)

Master Builders Australia

National peak body for general builders. Publishes commercial and residential contracts and industry guidance.

By state & territory

South AustraliaSA

Consumer and Business Services (CBS)

VictoriaVIC

Victorian Building Authority (VBA)

New South WalesNSW

NSW Building Commission (within Department of Customer Service)

QueenslandQLD

Queensland Building and Construction Commission (QBCC)

Western AustraliaWA

Building and Energy (within Dept of Energy, Mines, Industry Regulation and Safety)

TasmaniaTAS

Consumer, Building and Occupational Services (CBOS)

Australian Capital TerritoryACT

Access Canberra (Construction Occupations Registrar)

Northern TerritoryNT

Building Practitioners Board / NT Worksafe (Building)

Links above open the public website of each authority. BuildPilot is not affiliated with these bodies and does not act on their behalf. Information on this page is general - check the current edition of the NCC and the relevant state Act for binding requirements.