Our House Extension Process
Choose Extensions Unlimited for Your Melbourne Home Extension Project
We don’t just build extensions; we design additions that seamlessly integrate with your existing house, creating a space that feels designed for your life. We take the stress out of the entire process, managing everything from initial design consultations to final construction. Our team comprises highly skilled architects, building designers, experienced builders, and project managers, all dedicated to exceeding your expectations. We believe in clear communication and fixed-price contracts, ensuring you stay informed and in control of your budget. Since 1994, we’ve helped countless Melbourne families unlock the potential of their properties.


Extension Design Service
Following the initial consultation, if you choose to proceed, we’ll move into the design development stage. The initial meeting with your professional home extension designer is at no charge. This collaborative process involves working closely with our building designer to refine your vision and translate it into detailed plans with a functional and aesthetically pleasing design. We believe in open communication and encourage your active participation throughout this stage. Our building designer will present you with creative concepts that maximise the features of your existing home and optimise space utilisation. They might suggest tweaks to improve flow, enhance liveability, or introduce additional features you may not have initially considered. However, your vision always remains the priority, and we’ll ensure the final design reflects your style and preferences.
Detailed Working Drawings
Once the design is finalised, our team of in-house registered building practitioners will draft comprehensive working drawings. These detailed plans provide our experienced builder with a clear roadmap for the construction phase, ensuring your house extension project is built precisely to your specifications. By having a team of trusted specialists readily available, we eliminate the need for you to source and manage external draftspeople, saving you time and simplifying the process.


PERMITS AND ENGINEERING
Navigating building regulations and securing permits can be a complex and time-consuming process. At Extensions Unlimited, we take the burden off your shoulders. Our experienced team will handle all permit applications and negotiations with your local council on your behalf. This includes obtaining a building permit, securing any necessary reports like soil and bushfire assessments, and ensuring your proposed project complies with all relevant regulations. All associated fees are included in the fixed price of your extension, so you can rest assured there are no hidden fees in the final cost.
ASSURANCES
At Extensions Unlimited, we prioritise best building practices and client protection. When you choose us for your house extension projects, you benefit from the following assurances. We utilise industry-standard HIC6 contracts, guaranteeing a fixed project cost, a clear start and completion date, and clear outlined terms for both parties. Your proposed project will be fully covered by all necessary insurance policies, providing peace of mind throughout your home extensions process. Upon project completion, you’ll receive a warranty insurance certificate, offering additional protection for your investment.


CONTRACTS
Our unique three-stage contract approach ensures transparency and minimises risk for you. Stage 1 Design & Development: This initial stage focuses on refining your design, finalizing specifications, and providing a detailed cost estimate. Once you’re happy with the design and pricing, you’ll be invited to proceed to Stage 2. Preliminary Works Agreement: This stage involves securing all the necessary reports and approvals required by law before finalising the contract. This may include soil tests, engineering assessments, energy reports, and local council planning feedback. Extensions Unlimited will manage the entire process, ensuring all reports are obtained efficiently and meet council requirements. Stage 3 Final Contract: Following the completion of Stage 2, you’ll receive the final contract outlining the agreed-upon design, specifications, fixed price, and timeline for your house extension project. Once you’re fully satisfied and ready to proceed, signing the final contract signifies the official commencement of your extension project.
CONSTRUCTION
The construction phase is where your vision becomes a reality. Our team of experienced builders will bring your house extension project to life. We take pride in using high-quality materials and employing exceptional building practices to ensure a flawless and high-quality extension. Throughout the construction process, we prioritise clear communication and keep you informed of progress with regular updates. You’ll have a dedicated project manager as your point of contact, readily available to address any questions or concerns you may have.
We ensure all our tradespeople are fully trained and have completed an occupational health and safety course. All our constructions are regularly inspected by independent surveyors who issue reports during the progress of the works, as well as a final certificate upon completion.
All our electricians and plumbers are fully certified and licensed to ensure the highest calibre work. Our company project managers are qualified professionals who are always available for you if you have questions. Any required scaffolding will be erected by qualified riggers to ensure safety for you and your family. Company tarpaulins are also used to protect your home and the new addition.
Once your house extension is complete, it’s time to experience the joy of your new living space. We’ll conduct a final walkthrough with you to ensure everything is completed to your satisfaction and address any minor adjustments. Once you’re happy, we’ll officially hand over the keys to your dream extension.

EXCELLENT Based on 60 reviews A M2025-06-30Trustindex verifies that the original source of the review is Google. We recently had our house extension (3 rooms on ground floor) completed by Extension Unlimited. We couldn’t be happier with the results. From start to finish, Nick was professional, reliable, and very responsive to requests and clarifications. Nick and his team were very understanding and offered great suggestions and delivered high quality. Ritchie's workmanship has been excellent and the attention to detail really shows. The team kept disruption to a minimum, which made a big difference with a family still living in the house. We are very happy with the new build and would highly recommend them to anyone considering a home extension. Ar-Janine Bacanto2025-06-26Trustindex verifies that the original source of the review is Google. Our experience with Extension Unlimited is exceptional to say the less. The team is very professional, listen to our needs, explain every step-in details and given us a great comfort and fabulous results. • Starting from the reception who explained each step of the process. • Ted, the designer was very patience listening to our needs and requirements and came up with a great design. Making a few changes was not a big deal to him. • Penny who finalized the contract, permit application etc was great to work with. She explained every step thoroughly and gave us lots of comfort. • Ritchie and Travis – great team of carpenter who are always happy to come to work, did a great job and always clean and tidy up. Always explained in detail when we had any questions. A joy to work with. • The contractors of electrician, plumber, plaster, roof plumber and tiler engaged by Extension Unlimited are efficient and professional. • Nick our project manager – I had worked with a few sites managers in the past on various projects, but none can compare to Nick. His biggest interest is on client’s satisfaction and achieving excellent results. He kept us always informed on job schedule. The response time on phone calls and messages was always so quick and precious. He is a great leader of the team. • I strongly recommend Extension Unlimited to anyone. Matt Armstrong2025-06-04Trustindex verifies that the original source of the review is Google. I highly recommend Extensions Unlimited if you are looking to give your home a new lease on life and expand it to meet your family needs. Our extension was a complicated one, and completely transformed both the look and the functionality of our home. It is now a place we are proud to call our home! The EU staff and recommended contractors were amazing. Ted worked with us tirelessly to fine tune the design to meet our budget, whilst providing the "WOW". Emilio (our project manager) was a pleasure to work with and always had a solution for those head scratching moments. EU are a one stop shop having all experts under the one roof, which saved us both time and money. Luke Kennedy2025-04-12Trustindex verifies that the original source of the review is Google. We highly recommend Extensions Unlimited to anyone looking at either a big or small extension. The entire process from the initial enquiry with Sandy, design stage with Ted and construction phase with Nick was easy yet clear and detailed. We couldn't speak highly enough of Nick and his construction team. They are fantastic people, reliable and trustworthy. Jackson and Nicko were fantastic. Throughout the build we were consistently updated by Nick on what was happening and when. If there was a change in schedule it was communicated promptly and we always knew what was happening and when. 5 stars to all of the team at Extensions Unlimited. BabyG2025-03-23Trustindex verifies that the original source of the review is Google. We have had a wonderful experience with this company, starting with Spiro, and through out the entire build with the amazing team of Brett and his Team ( special mention to Jack). They always kept our comfort and safety in mind the whole time, even our fur babies and grown up kids were always kept comfortable and safe throughout the whole building period. We undertook a huge job with this company and essentially rebuilt our whole home and the final product is a fantastic custom home exactly as we imagined it. Thank you for making our dreams a reality and being so professional and thorough with your work. We can thoroughly recommend this team to anyone who is planning any sized renovation/extension. Thanks Tom and Alida Carmal Trumper2025-03-20Trustindex verifies that the original source of the review is Google. Thanks everyone, we couldn't be happier with the result! Our new extension is life changing and looks like its always been there. From start to finish the team were professional, available and incredibly patient (there were many questions!). The build itself moved quickly and we didn't even need to move out. We love our new home and highly recommend Extensions Unlimited. Anton Winter2025-03-13Trustindex verifies that the original source of the review is Google. We highly recommend Extensions Unlimited for their phenomenal work on our project. Our project manager Brett kept us informed of the progress throughout the build and his team were a pleasure to deal with on site. What sounded like a huge job to us was completed seamlessly and ahead of time. Penni, in the office was most attentive to our needs, no request was too hard. Thanks Extensions Unlimited. Chris Burridge2025-03-04Trustindex verifies that the original source of the review is Google. Great building experience. They were able to design an extension to exactly what we were after. Charles Juhasz2025-02-14Trustindex verifies that the original source of the review is Google. A huge thank you to the Extensions Unlimited team for their exceptional work on our project! From the start, Ted was incredibly patient and enthusiastic throughout the design process, ensuring every detail aligned with our vision. Once construction began, Emilio’s commitment and leadership made all the difference—his dedication to achieving our goals was evident in every step. The entire team was professional, attentive, and a pleasure to work with. We couldn’t be happier with the result and highly recommend Extensions Unlimited to anyone looking for a seamless and high-quality renovation experience! Thank you! Charles & Angela
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