About Us

We're highly experienced with a wide range of building services from bathroom and kitchen renovations to new house builds, and home extensions.

We'll Make Your Dream a Reality

Geoff fulfilled his childhood dream of becoming a builder way back in the late 70s with an apprenticeship for a large construction company. With a fine attention to detail and strong work ethic, he climbed the ladder quickly, taking a leading foreman’s position within 4 years.

In 1990, Geoff took the plunge into self-employment forming a partnership with a fellow builder. This fifteen year partnership not only provided a good grounding for small business management, but also cemented many long-term associations with sub-contractors and employees across Canterbury.

In February 2005, GMac Builders Ltd was established, with Geoff as Managing Director, and Lee working behind the scenes running the administration side of the business.

Contracts Manager, Greg, was first employed by Geoff back in the ‘90’s.  Since then, he left to set up and run his own business.  Years later he came back to work for us in 2019, and progressed to his current position of Contracts Manager.  Greg has a wealth of knowledge and is a valuable addition to the management team.

As a strong team, we’ve been building dream homes for Cantabrians ever since.

Get In Touch
Geoff McIlroy

Geoff McIlroy

Managing Director

E: geoff@gmacbuilders.co.nz
P: 027 494 0665

Lee McIlroy

Lee McIlroy

Administration

E: lee@gmacbuilders.co.nz
P: 021 246 7686

Greg Muir

Greg Muir

Contracts Manager

E: greg@gmacbuilders.co.nz
P: 022 015 0259

Core Values

Experience

Fully qualified with 40 years of experience in the construction industry, when you choose GMac Builders to complete work on your property, you can enjoy peace of mind knowing that you are in the hands of experts who will not let you down.

Workmanship & Dedication

We have built a reputation on the back of expert workmanship, professional service and dedication to delivering results, which is why GMac Builders is widely considered to be your premier choice in building companies Christchurch-wide.

Sound Advice

If you live in the Christchurch area and are contemplating a renovation project or are looking to make your dream home a reality, give the team at GMac Builders a call. Whether it’s in the form of expert advice or professional building services, we’re here to help you achieve the best results.

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Integrity. Dedication. Workmanship. 

Our Testimonials

We offer reliable top-quality building services for property owners all across Canterbury.

“Our rebuild with GMac was very well managed and stress-free. Geoff kept us informed and helped with suggestions through each stage. Nothing was ever a problem and all issues were dealt with promptly. GMac's tradesmen and subcontractors were experienced and professional. All work was completed to a very high standard. We would not hesitate to recommend GMac, and will definitely use them for any future projects.”

Linda & MikePreston Downs, West Melton

Simply put, we love our new house. The quality and attention to detail has been beyond what we could have hoped for. We had a very specific vision of what we wanted to achieve, creating a bespoke home around how we like to live. Geoff and his team have made that vision possible. At times, translating into reality what we and our architects had in mind wasn’t the easiest, but through great communication, and builders who know their stuff, we have achieved a home that gives us great pleasure and a place we are proud to share with our family and friends.

Dave & HeatherLincoln Project

We were thrilled with their professionalism and excellence that made for a smooth and stress-free build. We asked GMac Builders to take on a large-scale outdoor project to build a deck, pergola, and sandpit. Early on, the work had to be discussed and coordinated with an earthworks company and an architect. Very professional and knowledgeable, Geoff and his team were able to come up with good solutions to work around any potential issue that came up. Our foreman, Greg, built the deck and pergola to a very high degree of workmanship leading to an outstanding end result. The large outdoor area that GMac Builders has built for us has completely transformed the house and we enjoy it every day. This was not our first time doing a building project with GMac Builders and once again, we were thrilled with their professionalism and excellence that made for a smooth and stress-free build. They have to be one of the best building companies in the country, and we highly recommend their services.

Christelle & RegisChristchurch

We are really pleased and very proud of our new home. Geoff kept us well-informed throughout the whole process from design to completion. Geoff’s experience and expertise enabled us to have everything on our wish list, and the quality and workmanship is outstanding. Thanks for a pleasurable building experience and a wonderful new home.

Lynette & GlennLinden Grove

An expert builder, sound advisor, and a reasonably priced worker. I have known Geoff McIlroy since 1994 when my wife and I purchased our house, which he had recently built to an architectural design. Over the years he has completed any work we have required of him, including a substantial extension some years ago. We regard him as an expert builder, sound advisor, and a reasonably priced worker who has become a valued friend. I have no hesitation in recommending him and his work as a builder and organizer.

Roy WalkerMt Pleasant

I needed someone to do repairs after a flood in March 2014. After two earthquake repairs (both under cap through EQR) I was extremely stressed; wondering if there were only cowboys out there - cowboys only interested in making a quick dollar, making something look okay on the surface only. As it turned out – not only were there flood repairs, we found additional earthquake damage. It was a chance comment by another person that led me to GMac Builders. As well as being able to do both types of work, they are not cowboys. It was a huge weight off my shoulders. I found Geoff and his workers to be very professional and thorough. Geoff took the time to listen and answer questions, no matter how “dumb” I thought they were. He communicated well throughout the process, and regularly called in to check on progress. He and his workers were respectful that they were in someone’s home, not just on a building site. They did a great job and I am very happy. I would have no hesitation in using GMac Builders again.

Jane CollierHealthcote Valley

We were delighted with the end result. Geoff was recommended to us by architect Peter Milligan, to be the builder for the extension to our house. We were delighted with the end result. Geoff has excellent interpersonal skills and met with us often, always listening and offering sound advice. His staff were always pleasant and considerate. They put in a ‘false’ wall to enable us to have access to the living/dining area, and they also cleaned up every day. We are very pleased to recommend Geoff as an excellent builder.

Isobel & David PhillipsAvonhead

We would like to say how delighted we are with the house and the alterations made by the GMac team. It is always hard at the beginning of a project of this size to imagine how it will unfold and even understand what will happen along the way. In saying that, Geoff and the GMac team have not only achieved a great result for us, but made the whole experience really enjoyable throughout, even when we were challenged by the weather. In particular, their honesty and openness has meant that we never had to even consider referring back to the contract. Your recommendations for changes ensured that we now have a house that is not only practical, but also achieves our original design goals.

Mark & Leigh FiggitIlam