Knockdown Rebuild Timeline

How Long Does a Knockdown & Rebuild Take?

One of the first questions homeowners ask when considering a knockdown and rebuild is “How long will my knockdown rebuild actually take?”.

The answer is that every project is unique. Factors such as your home’s design, council requirements, site conditions and approvals all influence the overall timeline. However, while every project differs, most follow a similar process from the initial consultation through to handover.

Many people are surprised to learn that although the construction phase typically takes less than a year, much of the overall project timeline occurs before the first sod is turned. The design, documentation and approval stages are essential for ensuring your new home is built efficiently and with minimal delays.

The Typical Knockdown & Rebuild Timeline

These timeframes are indicative only and will vary depending on factors including council requirements, planning approvals, site conditions and the complexity of your home’s design.

Stage 1 – Initial Consultation and Feasibility

Every successful knockdown and rebuild begins with careful planning.

During the initial consultation, Elevate Building Group will:

• Inspect your existing property
• Discuss your goals, lifestyle and budget
• Assess whether a knockdown and rebuild is the most suitable solution
• Review planning overlays and local council requirements
• Identify any potential constraints early in the process

This stage lays the groundwork for the entire project. Taking the time to properly assess the site and understand your objectives helps reduce unexpected issues later in the process.

Stage 2 – Design and Pre-Construction (Typically 6-12 Months)

The pre-construction phase is often the longest part of a knockdown and rebuild, and it’s also the phase homeowners most commonly underestimate.

This stage typically includes:

• Concept home design
• Working drawings
• Structural engineering
• Soil testing
• Energy assessments
• Consultant reports
• Interior selections
• Detailed pricing
• Contract documentation

There are often numerous consultants involved, along with significant documentation and regulatory requirements before construction can begin. Coordinating these elements takes time, but it ensures your project is properly planned before work starts on site.

While many clients expect demolition or construction to commence shortly after signing a contract, the reality is that thorough planning during pre-construction is one of the biggest contributors to a successful build.

Planning Permits vs Building Permits

Every knockdown and rebuild requires a building permit before construction can commence.

Depending on the design and whether it complies with local ResCode guidelines, your project may also require a planning permit from your local council.

Whether a planning permit is needed depends on factors such as:

• Local council planning requirements
• ResCode compliance
• Site constraints
• Design complexity

Projects that comply with local planning requirements generally progress more quickly than those requiring additional planning approval.

Demolition and Site Preparation

Once all required approvals have been obtained, demolition is typically one of the quickest stages of the entire project.

This phase generally includes:

• Disconnecting existing services
• Demolishing the existing home
• Clearing the site
• Preparing the land for new foundations

In most cases, demolition and site preparation are completed within one to two weeks, allowing construction to commence soon afterwards.

Construction (Typically 9-12 Months)

Once construction begins, a typical custom home build takes approximately 9-12 months, depending on the home’s size, design and level of complexity.

Construction generally progresses through the following stages:

• Slab or base stage
• Framing
• Lock-up
• Internal fixing
• Fit-off
• Practical completion
• Handover

Throughout construction, quality workmanship, inspections and careful project management help ensure every stage is completed to a high standard before moving to the next.

What Can Delay a Knockdown & Rebuild?

While many projects progress smoothly, several factors can extend the overall timeline.

Common causes of delays include:

• Planning approval delays
• Council processing times
• Weather conditions
• Unexpected site conditions
• Material availability
• Engineering changes
• Client-requested variations
• Consultant availability

Not every delay can be avoided, but many can be minimised through detailed planning, realistic scheduling and proactive communication.

How Homeowners Can Help Keep the Project on Schedule

A successful knockdown and rebuild is a collaborative process between the builder and homeowner.

You can help keep your project moving by:

• Finalising selections as early as possible
• Minimising design changes during construction
• Responding promptly to requests for information or approvals
• Making progress payments on time
• Maintaining clear and open communication throughout the project

Locking in selections early significantly reduces the likelihood of delays once construction is underway.

Is There a Best Time of Year to Start?

Although knockdown and rebuild projects can commence throughout the year, October is often an ideal time to begin construction.

Starting around October provides several advantages:

• The base stage can often be completed before the Christmas shutdown period.
• Construction can continue efficiently early in the new year.
• There is a greater opportunity to have the home weatherproof before winter arrives.

Ultimately, the best time to begin depends on your approvals, design readiness and builder availability.

Is a Knockdown & Rebuild Faster Than Buying Land and Building?

There is no universal answer to this question.

Buying land in a new estate may involve delays associated with land titling, infrastructure and developer timelines. Conversely, knockdown and rebuild projects may encounter planning complexities depending on council requirements and site constraints.

The overall timeline depends on factors such as:

• Home design complexity
• Local council requirements
• ResCode compliance
• Site-specific conditions

Rather than comparing construction time alone, homeowners should consider the entire journey from planning through to moving into their new home.

Common Misconceptions About Knockdown & Rebuild Timelines

“Construction is the longest part.”

While construction typically takes around 9-12 months, the design, approvals and documentation phase often takes just as long, or even longer.

“Once I sign a contract, construction starts immediately.”

In reality, there is extensive planning, consultant coordination, approvals and documentation required before demolition and construction can commence.

“Every project follows the same timeline.”

No two projects are identical. Every site, council, design and approval pathway presents unique challenges that influence the overall schedule.

Real Project Example

A recent Elevate Building Group project demonstrates how careful planning and efficient project management can deliver outstanding results. The Edmonds Project, a new home built on a freshly subdivided block, was completed in approximately eight months, with construction taking place between February and October 2024.

While every knockdown and rebuild follows its own unique timeline, this project shows how thorough pre-construction planning, effective coordination and proactive project management can help keep construction progressing efficiently once work begins on site.

Conclusion

A knockdown and rebuild is a significant investment, and understanding the timeline helps set realistic expectations from the outset.

As a general guide, homeowners should allow:

• 6-12 months for design and pre-construction 
• 9-12 months for construction
• Approximately 15-24 months from initial enquiry through to handover

Although every project is different, experienced planning, proactive project management and clear communication can significantly improve certainty and reduce unnecessary delays.

If you’re considering a knockdown and rebuild, the team at Elevate Building Group can provide a personalised assessment of your property, discuss the process and develop a realistic timeline based on your site, design goals and local council requirements. Get in touch today to start planning your new home with confidence.