Duncan Thompson Extensions
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Duncan Thompson Extensions
We commissioned Duncan Thompson Extensions to renovate our 1930s single storey weatherboard. We are delighted with the result. From the design to delivery the team has an eye for quality and want to deliver the best product possible. Our house is better than we expected and we know we'll be happy here for many years to come.

Jim has a great understanding of how to interpret needs into design and Sam was patient and honest when project managing the work. We moved back in ahead of time and on budget. After careful consideration we engaged Duncan Thompson Extensions for a second story addition - a project that they managed from start to finish with confidence.
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Duncan Thompson Extensions is open and operating in accordance with the current guidelines outlined by the current Australian Government at this time. For any enquiries please contact our office by phone on 03 9836 8655 or message us via our website info portal. We will update our information as the situation changes.
As a leading Melbourne house extension builder, we are highly regarded within the industry and renowned for the quality of the home extensions we design and build.

With our unmatched quality, specialist in-house designers and an unwavering eye for architectural detail, our house extensions have created happy homes and sound investments for many families in the inner, eastern, south-eastern and bayside suburbs of Melbourne including Hawthorn, Brighton East, Balwyn, Caufield North, Camberwell, Surrey Hills, Glen Iris & Kew.
Because our design consultants are the people that meet with you initially, and the ones that design your extension, they take personal pride in their work and look forward to providing you with a positive outcome. The most important part of their job is to understand you and understand your extension needs.
Unlike some builders our team of experienced tradespeople have been with us for many years and possess all the skills and craftsmanship necessary to build any extension to the highest standard. Carpenters, electricians, bricklayers, plasterers, tilers, painters, no matter what the trade, we have the best people working with us.
Heritage homes are an elegant reminder of a time gone by and often have designs that still stand up today. If you are in love with your heritage home but need more room, then you need a builder with the right touch to deliver you an extension that doesn't compromise on the original style of your classic home.
Reviews (6)
Marilyn Small
Marilyn Small
Nov 04, 2020
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When we told friends we were going to extend, they said 'be prepared for all sorts of hidden costs, the time will blow out etc etc'. Not only did that not happen, the team at Duncan Thompson kept us in the loop from beginning to end, not surprising us at any time throughout the build.
From the time I rang the company to enquire about extending and spoke to Bryn Richards, the Design Consultant, (who was great), to meeting the boss Chris, and our wonderful site supervisor Sam, to the very final day of the build, Duncan Thompson did the most professional, job leaving us with a gorgeous second storey
Derek Nicholas
Derek Nicholas
Jun 22, 2019
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It was a pleasure dealing with Duncan Thompson. From the first appointment with Jim our designer it was a case of doing everything they promised when they said it would be done, unlike the other builders we spoke to while trying to organize our renovation and extension. This continued once the actual construction commenced and the entire project was completed ON TIME AND ON BUDGET. Our initial discussions with Jim our designer, were very helpful and he was able to formalise our wants and ideas into a concrete proposal. At all times he was open to discussion and willing to explain why an idea was
David Button
David Button
Jun 07, 2019
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We engaged Duncan Thompson to manage and build a second storey on our existing home. We initially interviewed three companies and although Duncan Thompson didn't provide a 'free design', we thought it was worth the money due to Jim's architectural experience. We weren't disappointed as Jim came to us with a very different design to the others, even incorporating an existing fireplace and chimney - which the other two companies told us to convert to gas - Jim thought outside the box. The three quotes we received were very close to each other. We decided to engage Duncan Thompson due to their local
Terence McAleenan
Terence McAleenan
Sep 26, 2018
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We initially engaged Duncan Thompson due to their reputation and experience. Bryn was personable, a good listener and made sure he understood our needs. He and owner Chris were flexible in negotiations, ensuring a win win outcome. Site manager Sam, foreman Robbie and team, were highly professional, excellent communicators and made sure the work was completed on schedule and to budget. We now have an attractive and spacious family home which we have no intention of leaving! My wife and I would not hesitate to recommend Duncan Thompson.
Melissa Pellegrini
Melissa Pellegrini
Dec 25, 2016
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Renovating with Duncan Thompson was easy.
The design team really listened to our ideas and translated them into plans that gave us everything we wanted and more, with many thoughtful elements to bring the 'wow factor'.
The build itself was straightforward and even enjoyable! The communication was outstanding, we always knew what was coming up next and when decisions would be required. Our garden and neighbours were respected throughout the process as well.
The building team were a pleasure - from the experience and professionalism of our project manager, to the work ethic of each builder; we
Jenny Skyring
Jenny Skyring
Oct 26, 2016
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We can't speak highly enough of Duncan Thompson. The whole team were truly amazing to deal with. From the initial design phase with Jim who delivered a layout that exceeded our expectations, through to the construction phase with a very professional team lead by site forman Sam and even the MD Chris made himself available which really reassured us that we had chosen the right builder. We have dealt with other builders previously and we believe there is no comparison. Duncan Thompson delivered a quality finish on time without an issues what so ever. For anyone thinking about renovating, we cannot