Geelong Custom
Extension Builders

Were here to guide you every step of the way.

Our building process has been developed from years of experience and takes into account our clients’ needs: in most cases you will be able to live in your home while we extend or renovate, and we make every reasonable effort to minimise disruption to suit your living arrangements.

Elliott Building Group engage and work alongside a select group of licenced, insured and highly skilled professional sub-contractors such as plasterers, tilers, plumbers and electricians most of which have been working with us for many years building dream renovations and extensions in Geelong and the bellarine peninsula.

We recognise that a home extension or renovation is a major investment for families and all members of our team work hard in their respective areas to provide workmanship and service that is of very high quality. 

We have been exceeding our customers’ expectations by providing individual professionalism, integrity and exacting standards over the years and we are here to exceed yours.

Don’t be part of the 45% who DON’T get their project completed!

Talk to a builder before your hire a Architect or building designer, As Geelong extension builders for 20 years, we’ve seen a lot. Don’t waste potential years of your life untill you speak to us. We know the process from the inside out. Plans, dealing with council, surveyors, engineers, budgets, materials, the best way to use your money. The process can be overwhelming. Were here to guide you every step of the way.

St Leonards Design and build : Frame stage.

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Portarlington Design and Build : Lock Up Stage.

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Our Process

Initial Discussions

We initially meet with you on site to discuss your renovation design requirements as well as giving an assessment on existing building structures. We will offer our professional advice to suit your current building structure and tailor it specifically to your requirements.

Following this consultation, we will ask you to consider all information to establish a price indication on construction cost so we can work towards common expectations, goals and budget.

We will then hire a third party estimator who prepares a Bill of Quantitys and a estimation at a cost to you. This enables a clear and consise road forward to a fixed price contract. This fee will be reimbursed on signing the contract.


During this step of the process, we will work with you to finalise construction drawings, product selections and engineer designs to prepare the formal fixed price building contract.


We aim to work with you and walk you through every step of the process. We organise and submit all relevant documentation to obtain a council approval and are with you every step of the way during your project.

Here’s the exciting part, we will demonstrate for you how all appliances and special features work along with passing on our warranties book with your 7 year structural warranty and 12 month maintenance warranty.

Frequent Asked Questions

Our Principal Builder, Tommy Elliott, meets every prospective customer and oversees each stage of the project, from appraisal through to final construction. You will always deal directly with Tommy.

This depends on the plans submitted & the scale of the project, normally approvals are obtained within 4 – 5 weeks.

No, we have a draftsman who prepares your working drawings for approval. We are also open to you sending through your pre prepared plans

No, we submit your plans for you and also organise and pay the relevant insurances, statutory body charges, Engineer Specifications, Certifier fees and Council fees.

Ground floor extensions vary in cost depending upon the size of the extension, construction of the existing house and general scope of works. As a general rule, extensions vary between $2056m2 – $3875m2. The difference is in the type of construction and the quality of the inclusions. For more information give Elliott Building Group a call.

There is a big difference between a free quote (estimate) and a comprehensive fixed price quotation. To obtain a fixed price quotation you will first need a set of plans for which you will need to engage a draftsman or architect who have very limited understanding and involvement in actual building and construction costs. Without having a builder involved from early planning stage budgets tend to blow out significantly and in fact approximately 80% of plans drawn by architects are never built for this reason.

Our concept stage has been developed as a low-cost alternative where we, as design and construction specialists design your extension using our experience and understanding of building methods and costs to provide the best solution to meet your requirements and budget. As you can appreciate and understand, there is a significant amount of time, effort and expense that is involved in preparing a concept design and comprehensive fixed price quotation specific for your proposed extension and renovation. To provide this highly specialised service we enter into a preliminary agreement and require payment of a nominal fee to suit your project.

The estimation fee is reimbursed on signing of the fixed price contract.

Prime Cost Items and Provisional Allowances are the estimated price of providing the work (Provisional Sum) or item (Prime Cost Item). Provisional allowances typically apply to trades such as asbestos removal, excavation, electrical and painting for which a fixed price cannot be provided subject to unknown conditions onsite. A Prime Cost Item is a specified allowance for an individual item such as a toilet suite, tap, vanity, kitchen cabinetry etc, that is subject to the client’s selection. Both Provisional sums and Prime Cost items are specified in both the quotation and carried into the fixed price contract, a credit or debit will be applied to the approved work or the selected item upon completion of works.

As part of the concept stage we obtain a council report on the land, including zoning and relevant planning overlays. This report outlines the:

  • Zoning of your property
  • If your house is in a character area or heritage listed.
  • If the property is affected by flood and/or overland flow
  • If there is any protected vegetation on or around the property
  • If your property is affected by road traffic noise or adjacent to a noise corridor
  • General site contours

With this report we then ascertain and decipher the relevant planning codes and overlays specific to your property and the proposed extension. These codes and overlays provide the requirements and planning restrictions such as:

  • Building Envelope (Front, side & rear setbacks and overall height limitations)
  • Number of stories
  • Site coverage restrictions, for lots greater than 450mwe can cover a maximum 50% of the lot.
  • Design requirements such as demolition control, traditional building character design elements, visual privacy requirements, car parking requirements etc.
  • Where affected by flooding, establish the minimum habitable floor level and design requirements to limit the impact of flooding and overland flow upon the property.
  • The type of works, relevant code and overlays also determines the level of assessment required, i.e. Relaxation Application, Development Application and Building Applications.