Specialising in ground and first floor additions

your home additions expert


These are the key attributes we pride ourselves on at R&J Building Contractors. For over 25 years, we have built an enviable reputation of quality and innovation construction specialising in ground floor extensions and first floor additions. We are proud of the success we have achieved by exceeding customer satisfaction in all areas of design documentation and construction, all with a focused attitude. When you build with us you will work with our highly skilled team of professionals who have earned a reputation for excellence in design and workmanship, both of which are crucial in adding value to your home and lifestyle. We are passionate about working with you to design and build you a home that meets your needs and is within your budget.

Award Winning Builder


Hills Building & Design Award (Residential Dwelling – Custom Built and Designed Home between $750,000 and $950,000)


Commonwealth Bank Excellence in Housing Award (House Additions/Alterations up to $80,000)


MBA Excellence in Housing Award (House Additions/Alterations $80,001 - $125,000)


Hills Building & Design Award (Residential Building - Additions/Alterations more than $150,000)

Ground Floor Extensions

Ground floor extensions are not the most cost effective way of creating extra space in your home, however they can be perfect if you have the extra land to build on.

An extension of the ground floor is a great way to create additional living space, especially when you would like to open up your living areas to join the outside entertaining area.

First Floor Additions

Thinking about adding a first floor addition to your home? This is the perfect way to create extra space in your home when you don't have the land to build on, or would like to take advantage of the most cost effective solution to gaining extra space.

We have several design packages to suit the needs of a growing family: Teenage Retreat, Parents Retreat and Family Retreat. These designs are a great starting point when thinking about first floor designs and can be altered to adjust your family's needs.

Need more space but don't know where to start?

We offer an initial obligation free consultation with our in-house building designer who will discuss design ideas and the feasibility of the project within your budget.

Our services including stepping you through the whole building process from the initial concept designs, tender proposal, council submissions and issue of the Final Occupation Certificate on final completion. However, if you already have plans finalised, we are more than happy to help with your build.

We are passionate about working with you to achieve your desired outcome.


"It has been a pleasure working with the whole R&J team and everyone that has been on site, whether they be contractors or R&J staff, have been great to deal with. You truly have a fantastic team of people".

Glenn, Winston Hills

"My wife and I were looking at the progress made on our build over the past month or so, and wanted to pass on our honest feedback to the office. First of all, we would like to thank Meeta for the brilliant design, concepts, continued and untiring collaboration over the past year or so, to bring us to this point. She’s been simply wonderful, relentlessly focussed and infinitely patient with us novices. Accomodating to the nth degree , including several discussions late evening or over weekends. She has been supportive, resilient and outstandingly creative with this project. Really grateful to her, and thankful that we have her as our architect and design specialist. Secondly, the outstanding crew led by “Rob the Builder” as I heard the boys sing out yesterday arvo (my 9 yr old son was dying to join them and we barely managed to hold him back)…. LOL …. Rob’s practicality, thoroughness, impeccable organisation, the respect that he commands from his crew, his approachability…. Thorough dedication, sacrificing sleepless nights ….. I’ll never run out of compliments and admiration him. We’re very Very lucky to have him direct and execute this project. The boys (and I only know a few names) are highly professional. Heavy rain, tricky decisions, logistics eg. my bathroom fittings….. nothing deterred them from completing an impeccable job. They are all Extremely polite and every day, through the quality of the progress , we note that they take pride in their work. Amazingly positive and calm attitude, inspiring professionalism. I can’t write enough about how grateful and thankful we are for the project team onsite. Finally, my interactions with the office staff via phone have been very helpful, and you’ve provided guidance and advice whenever sought. It takes a lot lot of effort, coordination, patient follow ups to orchestrate these complex and critically dependent moving parts. You are super humans making it all happen in the background silently. I realize the hours of calls and never ending task lists that you juggle every hour, and that is very much appreciated. I’m sorry this email has turned into an essay (and takes up your valuable time reading) . However, we honestly wanted to communicate our thoughts on the project thus far. In short , you’ve got a magical winning team here at RJBC. Meeta, Rob, the boys, the office staff and the sub-contractors you work with - each complementing the other with their strengths and creative flare. And every one a true professional who takes pride in their work. Thank you for all the hard yards. Looking forward to the coming weeks and project completion. "

Sid, Pia (Payel) and Enzo, Thornleigh

"We are very thankful for the professional and dedicated team at R & J Building Contractors."

Dong, Normanhurst

"I would like to say thank you to the team at RJBC for the great work. I love my new room and deck and greatly appreciate the efforts of everyone. I know there were some issues with council etc and if I had had to deal with them myself, I would have given up!

Lynne, Ermington

"We just wanted to say a big thank you for the work that you have done at our place. We love our new space and are really happy with the way it has turned out. After hearing many horror stories of builders and building I can honestly say the process with your company was pretty painless. The boys on site were always friendly and polite and the office staff were lovely to deal with. Jeff, thank you for answering my million questions and looking after the job for us. You have been fantastic! I have and will continue to recommend you to anyone who asks."

Cameron & Jami, Ryde

"Rob and his team had done a great professional work with our home addition. They were responsive and Rob always wanted to get the job done well. Hence they finished the complete renovation including the first floor addition in just over 4 months. Any construction work has challenges and stress, Rob made sure he was transparent with us and went the extra mile to ensure that the project does not stop or get derailed. Would certainly recommend Rob and his team!!"

Sudip, Cherrybrook

"We are extremely happy with the work completed! Everyone that worked on the job were professional, courteous and a pleasure to have on-site. You should be very proud of your business and we wouldn’t hesitate to recommend you to anyone!"

Chris, Winston Hills

"I had the team from R&J Building contractors add a second level to my existing house. Right from the start everything went smoothly, R&J took care of everything from plans, council approvals and constant up to date progress information. Rob and his team are true professionals, quality work, very polite, best part of the build is we didn't have to move out. When finished I was so impressed I had Rob renovate the down stairs bathroom and laundry. R&J Building Contractors are highly recommended."

Craig, Castle Hill

"Used RJBC for a home extension last year. Very professional, easy to deal with and explained things along the way. We were very pleased with their work and standards."

Daniel, Northmead

"Now to the entire R&J team…. ‘YOU GUYS SERIOUSLY ROCK!’ What a wonderful outcome. We’ve enjoyed working with each & every one of the team. It’s been a pleasure to have the guys as part of our daily family activities for the past several months. We love R&J & our fantastic new home. Thank you most sincerely"

Andrew & Narelle, Pennant Hills

"This is the second time we have used R&J for a building project and both times we have been very happy. The first time was for a garage conversion and the most recent time was to open up our living space for a new kitchen. Every trades person they sent (electrician/plumber/demo/carpenter/tiler) did a fantastic job. I have no issues recommending these guys and we will use them again when we need to add another bedroom."

Charlie, Baulkham Hills

"As you know, choosing a builder for a major renovation is not something you do without a lot of thought. Although we were confident after meeting with you that we’d made the right choice it wasn’t until we were fully into the build that we knew we had. The professional way every member of your team worked as well as the sub contractors you employed made it a hassle free experience. Most of all though, Rob, the way you made yourself so accessible and open to discussing the build right throughout the process made a massive difference. Being able to talk things through with you on a daily basis and make changes where necessary ensured problems were solved on the go. Your follow up too since completing the renovation in attending to the small remaining issues has been excellent. Thank you for creating our new home which we now enjoy so much, we very much enjoyed working with you on the project and wouldn’t hesitate in recommending your services to family and friends".

Veronica, Ryde

The home improvement specialists


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(02) 9651 5500


Unit 10, Dural Park, 280 New Line Rd

Dural NSW 2158

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