We’ve refined our building process over decades to make renovating or extending your home as clear, smooth, and stress-free as possible—from first enquiry through to handover.

Our Process

1. Initial Enquiry

After your initial enquiry, we will contact you to arrange an on-site meeting, generally within one week.

2. On-Site Meeting

We meet with you at your home to discuss your objectives for the extension. At this stage we explain what can and can’t be achieved based on building regulations, site conditions, and council requirements.
Where possible, we will suggest suitable design solutions and provide indicative (ballpark) costs.

3. Design Process (Approx. 2–3 Weeks)

Based on the on-site meeting, we prepare an initial design for your extension. In some cases, we will review this design with you and make adjustments based on your feedback.

Once finalised, the design is fully costed and presented with a detailed specification of works.

4. Design Revision

If required, we revise the design and costing. Our goal is to deliver a well-designed extension that enhances your lifestyle and fits within your budget.

5. Preliminary Agreement

Once you are happy to proceed, a preliminary agreement is signed to carry out the following:

  • Preparation of working drawings

  • Soil testing and engineering computations

  • 6-star energy rating

  • Submission of building permit documentation to the building surveyor

  • Liaison with relevant authorities as required

6. Contract Signing

After all documentation is finalised, a standard HIA building contract is signed.
At this stage, domestic building insurance is obtained and the building permit is issued.

7. Construction

Construction generally commences within three weeks of the building permit being issued.

8. Progress Payments

Progress payments are made at the stages set out under the Building Act and outlined in the building contract.

These stages typically include:

  • Deposit – Payable on signing the contract

  • Base Stage – Completion of slab or stumps

  • Frame Stage – Completion of framing and approval by the Building Surveyor

  • Lock-Up Stage – Roof, windows, and external walls installed

  • Fixing Stage – Installation of plaster, skirtings, architraves, and doors

  • Completion – Final works completed and Certificate of Completion issued by the Building Surveyor

Cost Information

Finance is a key part of every building project, and at Deja Blue Homes & Betta Extensions and Renovations we pride ourselves on providing detailed, transparent costings from the very beginning.

We provide clear and comprehensive pricing so you can confidently understand where your investment is being allocated throughout the project. After all, it is your home, your vision, and your budget.

No two projects are the same, however our extensive experience in luxury homes, extensions and renovations gives us a thorough understanding of the building process. This allows us to offer fixed-price contracts with payments structured in project stage instalments for added peace of mind.

What Influences the Cost of an Extension or Renovation?

During your site inspection, a number of factors are assessed to determine the scope and investment required for your project, including:

  • The size of the extension or renovation

  • Roof style, external appearance and selected finishes

  • The complexity of integrating the new build with the existing home

  • Existing floor levels, plumbing and drainage conditions

  • The style, size and quantity of doors and windows

  • Existing services including electricity, heating and water

  • Ground conditions and site accessibility

  • Council planning permit requirements

  • The level of finishes and features desired in your new space

Building Materials

We have established strong supply partnerships with some of the industry’s leading building suppliers. This gives our clients access to quality products, excellent service and competitive pricing, with savings passed directly on to you.

Skilled Trades & Workmanship

Over many years we have built long-standing relationships with trusted trade contractors who share our commitment to quality craftsmanship.

Because we provide consistent ongoing work, we are able to secure highly competitive trade rates while maintaining exceptional standards across every stage of construction.

Project Management

Effective project management is one of the most important elements of a successful build.

While quality materials and skilled trades are essential, strong project coordination is what keeps timelines on track, controls costs and ensures a smooth building experience from start to finish.

Our streamlined processes, attention to detail and industry experience are what set us apart and allow us to deliver exceptional value without compromising quality.