Guaranteed Home Extension Melbourne
We provide fixed-price home extensions in Melbourne, handling design, permits, and construction in 3-6 months for families needing more space, guaranteed on time and on budget. Our building solutions offer peace of mind.
The price we quote in your HIA building contract is the price you pay. This gives you complete financial certainty for your project and there are no hidden costs.
Your extension is protected by our 10 year building guarantee. We build high quality extensions that are made to last.
You deal directly with our owner, providing clear communication from the first meeting to project completion.
Free & Friendly Consultation
Get A Free No Obligation Quote
Who We Help with House Extensions
We specialise in expanding your living space to perfectly match your family lifestyle upgrade with our expert home extensions. Our process delivers certainty and a stress free renovation from a trusted builder.
Add new bedrooms and living areas to create the space your family needs to grow.
Build a dedicated home office for a quiet and productive work environment.
Create an open-plan living and alfresco area for modern family entertaining.
Seamlessly blend a new extension with your home’s original character and charm.



This service is not suitable for renters or non-residential properties.
Our 3-Step Home Extension Process in Melbourne
Our streamlined process ensures your house extension is delivered on time and on budget. This is how we manage every home renovation project.
Consultation & Quote
We meet at your home to discuss your goals and assess the site. You then receive a detailed, all inclusive fixed-price quote within 48 hours for total clarity from the start.
Design & Building Approvals
We collaborate to finalize the architectural plans for your approval. Our team then manages the entire council permit process, securing all necessary building approvals on your behalf.
Construction & Handover
Our owner, a registered builder, personally supervises the build to guarantee quality. Upon completion, we conduct a final walkthrough with you and hand over the keys to your new space.
Ready to Plan Your Perfect Home Extension?
You’ve seen our process and our promises. Take the next step towards creating the home your family needs. Your on-site consultation and detailed, fixed price home extension quote are completely free and carry no obligation.
Our Home Extension Portfolio
Browse our gallery of recent work and imagine the possibilities for your own home, backed by our 10-year structural warranty.
Melbourne Home Transformation Case Studies
Beyond the images, here are the stories of the specific problems we solve for our clients.

"We design for your family's real life, not just for the plans. Our focus is on solving your daily frustrations to create a lifestyle matching extension that genuinely improves how you live."
Wafa Ismael, Founder & Licensed Builder
Kew Home Extension for a Growing Family
Problem: A cramped, disconnected living area that made family life feel chaotic.
Solution: A ground floor extension creating a vast, central living hub and open plan kitchen. This design created more space.
Outcome: Completed in 4 months, on budget, delivering a significant family lifestyle upgrade. The renovations were a huge success.
Kew Home Extension for a Growing Family
Problem: A cramped, disconnected living area that made family life feel chaotic.
Solution: A ground floor extension creating a vast, central living hub and open plan kitchen. This design created more space.
Outcome: Completed in 4 months, on budget, delivering a significant family lifestyle upgrade. The renovations were a huge success.
“Mardo Building Co. made it seamless. Our home feels twice as big and functions perfectly for our family now.”
Jane S.
Homeowner
Bentleigh Renovation for a Professional
Problem: No dedicated space for a quiet home office setup to work from home effectively.
Solution: A second storey home addition with a quiet, sun lit home office and master suite. A clever extension design.
Outcome: A perfect work-life balance in a productive work environment without sacrificing valuable garden space.
Bentleigh Renovation for a Professional
Problem: No dedicated space for a quiet home office setup to work from home effectively.
Solution: A second storey home addition with a quiet, sun lit home office and master suite. A clever extension design.
Outcome: A perfect work-life balance in a productive work environment without sacrificing valuable garden space.
“The new office is a game changer for my productivity. The entire process was professional and stress free.”
Mark R.
Homeowner
More Reviews from Melbourne Homeowners
Our guarantees are more than just words. Here is the proof, directly from the homeowners who have experienced our process.
EXCELLENT Based on 23 reviews Posted on Google Omar De La PazTrustindex verifies that the original source of the review is Google. Very happy with the engagement with Wafa from start to finish. He personally reviewed the job, discussed with me what was going to be done and completed it with no hassles. Whilst the job was not big it was professionaly done. Satisfied with the end result.Posted on Google Siying ZhouTrustindex verifies that the original source of the review is Google. Excellent in communication. Nice completion of the required job.Posted on Google Robert J. SedkyTrustindex verifies that the original source of the review is Google. Highly recommend. Excellent work and communication.Posted on Google mark dorganTrustindex verifies that the original source of the review is Google. Professional & efficient company! Very polite & obliging. Very happy with the results, would highly recommend.Posted on Google DiaTrustindex verifies that the original source of the review is Google. Wafaa and the team are great, highly recommended.Posted on Google Stathis PaleologosTrustindex verifies that the original source of the review is Google. I honestly can’t recommend Wafa and his team enough! They were professional, honest, and kept us in the loop the entire time. Plus they delivered exactly what they promised with no shortcuts. They were also super accommodating when we wanted to make a few changes along the way. Their attitude was so positive throughout, and they reconstructed our porch to be even better than it was before. If you want a building company that’s efficient, honest, and reliable, seriously—don’t look elsewhere.Posted on Google LESLIE EARNSHAWTrustindex verifies that the original source of the review is Google. We had Marbo Co completely paint the inside of our house. Waffa gave a quick response, the quote was fair, and he was patient when we had to delay the start. Sean did a fantastic job, we were very happy with results and the communication, and both Sean and Waffa returned after we moved back in to make sure we were happy with the job and to do a couple of incidentals that were really helpful. Could not recommend them more highlyPosted on Google Peter AtanasovskiTrustindex verifies that the original source of the review is Google. I've used Wafa and his crew for three separate jobs now from a bathroom renovation through to full house renovations, and I've had a great experience every time. He always answers the phone, is super responsive, and communicates clearly throughout the process. He shows up when he says he will, gets the job done properly, and genuinely wants to make sure you’re happy with the result. It’s rare to find someone you can trust to both start and finish a job to a high standard, but that’s exactly what you get with Wafa. Highly recommended!Posted on Google Yasir A. HasanTrustindex verifies that the original source of the review is Google. Wafa and his team at Mardo Co. were good to work with—professional, reliable, and genuinely attentive to their clients. I’m happy with the renovation results and would recommend them. 🌹Posted on Google AryanTrustindex verifies that the original source of the review is Google. We had a great experience with Mardo Building. The construction of our home was done on time with very professionals and with excellent attention to detail. Wafa, the contractor, was reliable, knowledgeable, and easy to communicate with throughout the project. The work was completed on time and the quality exceeded our expectations. We highly recommend Mardo Building to anyone looking for a dependable builder. It was really good to work with Wafa. The team was professional, reliable, and delivered excellent quality work. Very happy with the result. Thank you for making our dream come true with excellence.
Your Benchtop, Engineered by Builders
Your home extension is personally supervised by our founder. This direct to builder approach is our promise of quality and your assurance of a stress free process.
You’ve seen the possibilities. The next step is a simple conversation to transform your ideas into a fixed price plan, managed by Melbourne’s expert building team.
Frequently Asked Questions
With a clear understanding of the process, let’s address some final common questions about renovations and home extensions.
What is the typical timeline for an extension?
3-6 months. This is the standard construction timeframe for most home extensions, and your specific timeline will be locked into your HIA building contract for your renovation.
How do I know if my home is suitable for an extension?
We assess this for you. In our initial free consultation, our house extension builders evaluate your property’s structure, land, and council zoning to confirm viability before any work begins on your home.
How is a fixed price contract different from an estimate?
It’s a guarantee. An ‘estimate’ can change. Our fixed-price contract is a legally binding document that locks in the cost, protecting you from budget blowouts during the build.
Who will be my day to day contact on the site?
Our owner. He provides daily site management, so you always have a direct line to the owner-supervised build for ultimate clarity and accountability for your house extension.
What happens if you find unexpected issues like asbestos?
We provide a transparent variation. When it comes to asbestos handling in extensions, safety is key. We stop work and provide a clear project variation document detailing the cost and time to rectify it. We never proceed without your full, informed approval.
What if I want to make a change mid-project?
We document it clearly. If you request a change, we prepare a variation document outlining the cost and timeline impact. We only proceed once you have reviewed and approved it for your home extension.
Start Your Home Transformation with Confidence
We have shown you the clear, guaranteed way to extend your home.
Partner with Mardo Building Co. for a fixed-price contract, a 10-year structural warranty, and a seamless process that delivers the space your family deserves. Let’s build your future, together.