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

Pranita C.
We are delighted that we chose Capital for our extension project. Pierce, who was the first point of contact for us at Capital in the initial phases, was one of the main reasons for us to go with Capital. Pierce was very patient with us and made a lot of effort to understand and translate our requirements. They transformed our 2-bed villa into a 4-bed family house, not only by adding all that extra space but also by enhancing the appearance of our house to a modern, contemporary home. The process took approximately seven months (including Christmas break), which was very quick. We lived in the house while extending and had no trouble. The speed did not compromise the quality. All trades used were experienced and strived for perfection. Capital has a great team of people, well led by Travis. All our interactions with Capital team were professional and I would highly recommend Capital (CB) to anyone wanting to do an extension/transformation of their home.
Response from the owner: Thankyou for the review Pranita. We are thrilled you are enjoying your new extension and it was great working with you also. Best of luck for the future, CBC Team.
Dinesh M.
We had our 3 bedroom single storey 1950s house transformed into a 2 storey 4 bedroom house. When we bought our place it was the best we could afford, and once we outgrew it we tried looking for something bigger but the cost is prohibitive and you'd have to move to the outer suburbs to get something reasonably sized. We approached several builders, and they1. Didn't even bother turning up,2. Demanded a $1000 payment for plans without even looking at the house3. Turned up, looked at us, and basically told us we couldn't afford it.Enter Dean from Capital Building. Over several meetings, he patiently and professionally visited our place, listened to our wants, offered us options, and generally gave us the feeling that we had a way forward. We would like to thank Dean for his enthusiasm and the confidence he gave us to go ahead with this exercise.Once permits were in place, we were handed over to the build team, and again, we were put at ease with their approachability and professionalism.We have never built before, so all this was new to us. The team at Capital was very good at explaining the processes and addressing our concerns. Travis, as the director, is a good operator and very switched on. Laura, our designer, helped us a lot with her input for the materials and components of the build. Tiffany kept us in the loop with constant communication regarding dates and activities.Andrew was the supervisor assigned to our build and was in charge of the team doing the work on our house. We want to thank him for his patience and the way he tried his best to make this process as smooth as possible.Make no mistake, a build of this nature is not a walk in the park. It is significant work and to live through it as we did with our young family can be challenging. However, Capital and their team genuinely did their best to make it as low impact on us as possible and 7 months later we basically have a brand new house. We still can't believe it sometimes.Thank you to the team at Capital. With the housing market being what it is, I think extensions like these are a great affordable option for families who grow out of their homes but want to stay in the suburbs where they've put down roots. Capital's 5 star reviews and growth are no accident. They are good at what they do and great to work with.We wholeheartedly recommend them.
Response from the owner: Fantastic Dinesh, We are really glad you are enjoying the space and your review perfectly sums up our process and what we try to achieve. We agree, extensions are a quick and cost affective way to increase your space. Thanks again CBC Team.
Craig C.
Travis, Kyle and the rest of the Capital Building Team demonstrated professionalism, honesty, punctuality, great communication and experience throughout every stage of our build. They were a pleasure to deal with and I would highly recommend.
Response from the owner: Hi Craig, Fantastic to hear from you! We are glad to hear everything is going well & you had a great experience with us. Thanks again, CBC Team
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.

Google Rating
Based on 27 reviews