Home Extensions

A home extension is the perfect way to improve functionality, add space and increase value of your property. Capital Building Contractors have been building stunning Home Extensions across Melbourne for years. We understand the importance of creating spaces that are both functional and beautiful. 

Home extension costs differ from property to property. Typical costing is around $4000-$5000 per square metre. Additional costs should be expected for premium materials, fixtures and finishes. To find out how much your extension will cost, the best way is to get a quote.

With any home extension or building project, we take the time to understand your needs. From design, to permits, to building, we will be with you every step of the way. For a no-obligation appraisal, contact our friendly team

Why Do A Home Extension & What Are The Benefits?

Capital Building, a Melbourne home extension builder, we have many years of experience in designing and building aesthetically beautiful and efficiently functioning homes for our clients.  Whilst we adhere to our own strict Design Principle guidelines, our goal is to meet the needs of the homeowner. We ensure your building or home extension is in harmony with the rest of your home, is energy efficient and is built with only the best and most appropriate materials.

Building Extension Ideas

  • We can help with many different types of house extensions:

    • Single storey building extensions – kitchen/meals area, living rooms, extra bedrooms.
    • Second storey extension – a new living area, bedrooms, a study.
    • Addition of a sunroom, conservatory or pool house.
    • Over-structure extensions – an office, bedroom or extra room over a garage.

Capital Building takes a holistic approach to all its home renovation projects, from initial design, the renovation build and finally the hand-over of the home improvement. 

Benefits Of Home Extensions

There are many reasons why people choose to do home extensions:

  • Extra living space providing greater comfort especially for growing families
  • Additional room or rooms such as a pool room, study or library or an extension to a current room, for example, a kitchen
  • Less time and inconvenience than constructing a new home
  • Increasing the value of your home

Extension Specialists

Capital Building is a registered Master Builder and an experienced building designer.  We can advise you on which type of home extension is most suitable for your requirements.  We can help with the ideas on best room locations and orientations, what are common room sizes, what materials to use, details of structural specifications, financial implications and regulatory requirements and limitations.  We can minimise the complexity of the often complicated business of extending your residence.

Home Extension Costs

The cost of a home extension is dependent on what you are having done.  A double storey extension involving six rooms will cost significantly more than the addition of a small bedroom.  If you can be open about your budget, then we can give you the best advice.  If we know your budget, we can advise you early on as to whether your dream home extension can be met or whether it needs amending.

If you have any worries that by revealing your budget, you may not get the best deal, as a registered Master Builder, we will give you a competitive price that is commensurate with the high quality we deliver.  It is understood, and expected, that you will talk to a number of builders before making your decision. So let us help you figure out what your next step should be in building your dream building extension in Melbourne.  You can call us, request a call back or request a quote.

Weatherboard Extension Builds

Weatherboard extensions have always been a staple in Melbourne’s architectural scene. This trend is not just because of the city’s love for blending heritage with modernity but also for the style, flexibility, and cost effectiveness these extensions offer. Whether it’s a 20th century heritage home, or a contemporary abode, weatherboards fit seamlessly. Their ease of Installation and flexibility make them highly regarded among designers, builders, and owners alike. So, if you’re considering a home makeover, the blend of old and new that a weatherboard extension offers might be the refreshing touch your home needs.

Our Credentials

Building an extension or renovating is one of the biggest purchases in our lifetime. Therefore, it is essential that before going ahead with a project you can trust the building company that you choose.

Capital Building has an impressive list of credentials which means that should you choose it, you will be using a trusted, experienced, honest and safe building operator.

Registered Building Practitioner

Peter Harnischmacher and Travis Vinton, are ‘Registered Building Practitioners’ with the Victorian Building Authority.

Master Builder

Travis is currently a Master Builder member of  Master Builders Australia.

Green Living Master Builder

Capital Building is registered as a Green Living Master Builder Master Builders Association.

Victoria Building Authority

You can check Capital Building’s registration credentials by contacting the Victorian Building Authority. (Tip: search for ‘harnischmacher’ or 'vinton' under the Practitioner Name field)

Public Liability Insurance

Capital Building has Public Liability Insurance up to $5 million. For information about Public Liability Insurance see: Public Liability Insurance

Contract Works Insurance

Capital Building has Contract Works Insurance. For information about Contract Works Insurance see: CoverForce

Our Reviews

Mohammad A. ★★★★★ Fantastic, superb, and excellent. These are a few words to explain how Capital Building completed our extension in just under seven months’ time. We engaged Capital Building to our much-loved home and were nervous with such a major change happening while we are living in the property. But Travis and his team came out professionally and with a ‘Can do’ attitude to complete and deliver the best that we had expected from Capital. Travis and his team are customer specialised, skilled, and experienced which are highly important to handover a house that we all love. Travis took good care of our requirements and at times visited our site to ensure everything was on track based on our needs. Thanks Travis, we appreciate your assistance throughout. We also like to thank Dean, Tiffanie, Janine, Jay, Tom and the rest of the Capital team members and would definitely recommend Capital who are honest, dedicated and deliver the best to the building industry based on their promises. All the best Capital and keep up the good work!- Mohammad & SanjiResponse from the ownerThank you very much for your kind words, Mohammad, it was a pleasure to work with you and make your dream a reality. Cheers, CBC Team. Garry M. ★★★★★ We highly recommend Capital Building Contractors, without any hesitationWe signed a contract in March 2022 for a 71sqm second story extension which was finished and handed over in November.And it looks fabulous.Not only were Capital the easiest to deal with through the quote stage, but they gave us the best price.Capital honoured the spirit of the fixed price agreement, doing numerous extra things that were not part of the contracted spec but required to deliver our vision.The tradies on site were skilled, polite and worked with consideration that we were living in this construction site.Our take: they are a competitively priced, customer focussed, expert, high quality and dependable house extension builder that is a delight to do business with.Garry and Jennifer McCarten, DoncasterResponse from the ownerThank you for your wonderful feedback, Garry and Jennifer. It was our pleasure to deliver your project and are so happy we could realise your dream. Cheers, CBC Team. Janice W. ★★★★★ Highly recommend Capital Building Contractors.We have just moved back into our newly renovated home (7 months build) and are extremely happy with the results.We commend Travis, Tom, Dean and team for delivering our house to budget and timeframes given the challenges experienced by the building industry with COVID-19 restrictions and supply chain issues. This company is well run, competitively priced, has excellent customer service and MOST IMPORTANTLY care about doing a good quality job. The team are experienced, hard working and have been a pleasure to deal with - from the designer (Dean), builders (Travis, Tom and team) to the support staff (Tiffanie, Janine and team).During the initial consultation/design, Dean worked patently with us in the middle of COVID lockdowns across many iterations of the design, providing valuable guidance on design decisions and budgetary impacts. Dean successfully translated our vision and even visited towards the end providing suggestions when I asked about lighting, furnishing and paint colouring !!During construction we had regular communication with fortnightly on site meetings discussing status, activities over the next few weeks and any issues requiring decisions.Travis, Tom and team are true professionals and focused on doing a quality job correctly. No shortcuts were taken - eg. when old floorboards were ripped up they rectified the flooring support which was not to current standards. Challenges such as fitting the large internal glass door and floating fireplace ledge were resolved with "out of the box" thinking and ongoing consultation with us. On completion, the surroundings of the house were also made good, with the side gate rebuilt and top soil added to the backyard - this was over and above our expectations.Capital Building Contractors were recommended to us through word and month. We are extremely grateful that we went with this company and would absolutely recommend them.Thank you Travis and team! .Response from the ownerThank you so much for your wonderful words, Janice. It was such a pleasure to work with you and achieve such a great outcome together. All the best. js_loader
A home extension involves adding additional space to your existing home, expanding its size and accommodating your changing needs without the need for moving.

Capital Building offer a variety of home extension options, including rear extensions, side extensions, loft conversions, basement conversions, and multi-story extensions, depending on your specific requirements and property layout.

The need for planning permission depends on factors such as the size and location of the property and the proposal, along with property covenants and overlays.. Our team will assess your project and advise you on the necessary permits and planning regulations.

The duration of a home extension project varies depending on its size and complexity. Typically, the planning and design phase takes 3-4 months, excluding town planning approval if that’s required. Depending on the scope of the project, construction might take 6 months for a smaller and simpler build and up to 9 months or more, for larger and more complex builds.

Yes, Capital Building offer design and build services to plan and visualise your home extension. Our team of designers can provide free, no obligation concept designs and budgets, which can be formalised into professional drawings by Architectural Draftspeople.

To get started, you can contact us to schedule an initial consultation. Our team will visit your property, assess your needs, discuss design ideas, provide an estimate, and guide you through the next steps.

Depending on the scope of the extension and the level of disruption, it may be possible to live in your home during the construction. However, there may be certain periods where temporary accommodation is recommended or required.

Typically, house extensions cost $3500-$4500 per square metre. This cost will change based on your build preferences. The most accurate way to find out how much your extension will cost is to get a free quote.

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