Building and Insulators Invercargill

When my father, Brian, started BJ Carter back in the early 60s, he was big on three things: "do it once, do it right", loyalty and great communication.


 James and Vehicle (JPG - 34kb)Those values remain a cornerstone of our approach today, and, we reckon, lie at the heart of why we're one of Southland's longest-serving building and insulation firms.


For my part, I joined the family business in 1992. I had served my apprenticeship with Invercargill builder Dave Marshall 10 years previously, before setting off on my big "OE" working in construction in Australia, Britain and South Africa.


In every job we take on at BJ Carter, large or small, I personally oversee each project from start to finish. If there's a problem, a concern or a question, all our clients have a direct line to me to get what they need immediately. We put as much effort and care into building great relationships as we do building structures.

On the building front, we specialise in new homes, including design and build, renovations and alterationsmaintenance, as well as light commercial work. What we don't do is "build by numbers"- we work carefully with every client to ensure their unique vision is brought to life, and there's no template for that.

All of our tradesmen have been carefully handpicked, not just for their building talents, but their attitude, integrity and strong work ethic. As a result, our team has a long tradition of punching well above its weight in terms of awards, with several regional and national accolades for projects ranging from family homes and renovations to commercial developments.


We were one of the first specialist insulators in Southland three decades ago. And, recently, we launched our own insulation line, Envirowool - using 100 per cent pure southern New Zealand wool.

As part of our commitment and passion, we have always been actively involved in Registered Master Builders, as well as regularly taking on apprentices, to help and develop our industry and our business.

Perhaps the biggest compliment we receive is the repeat business we gain from our family of clients, who come back to us, project after project, generation after generation.


Looking back to 1961 when the foundations of BJ Carter were laid, a lot has changed in how homes are designed, built and insulated.

The houses may have varied, but our driver is the same today as it was the day BJ Carter began: Commitment - commitment to craftsmanship, commitment to quality and commitment to superior client care.

James Carter

So, welcome to our site - if you would like some further information or you're keen to discuss your next project, the team and I are here to help in any way we can.

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James Carter
Managing Director
BJ Carter Limited



We were among the pioneers of home insulation 30 years ago, and have been bringing southerners warmer, drier and healthier homes ever since – we’ve even recently developed our own system, Envirowool.

We’ve specially designed Envirowool – including its installation technology – to reach every nook and cranny of the roof cavity, insulating areas other products don’t have a chance of reaching.

Using pure southern New Zealand wool blown into the roof space, Envirowool prevents up to 40 per cent of a home’s heat loss. It’s affordable, toxin-free, professionally installed by our qualified tradespeople and brings with it a wealth of benefits only wool can.

Read more

Email us at, or give us a call on 03 235 2848 to arrange a free, no obligation quote.


Bringing out the best in older homes is one of our key specialties, particularly restoring villas.

Whatever era your home, if you’re looking to give it a makeover, give us a call, and we’ll help you scope out the project and the budget, and bring your vision to life.


Tel: 03 235 2848


Our new joinery factory is now up and running, turning out high-end, custom-made woodwork.

Whether it’s a commercial shop fit-out, an organiser system for your walk-in wardrobe or beautiful bespoke joinery for your home, we ensure innovation and craftsmanship in every project we take on.

To talk to us about your joinery project, call us on 03 235 2848 or email