OTJ Building is a licensed Northern Tasmanian builder delivering new homes, custom builds and renovations, with certified Passive House expertise behind every project. Whether it’s your first home or a one-off architectural build, you get the same thing from us: a clear price, a straight process, and a home built properly.
You deal with Oscar, the licensed builder, from the first estimate and quote right through to handover and beyond into maintenance. You won’t be handed between a salesperson, a project manager and a call centre. The person who prices your job is the person who builds it, and the one you call if anything needs attention afterwards.
Our quotes are itemised and fixed-price, so you know exactly what you’re getting for your money before you sign. No vague allowances, no guessing, and no nasty surprises halfway through.
Changes happen on every build. When they do, we document them, price them and get your approval in writing before any work goes ahead. Combined with our monthly client walk-throughs on site, you always know where your build and your budget stand.
Every part of your home is built by qualified, experienced tradespeople we know and trust, not whoever happens to be available that week.
We use Master Builders Tasmania contracts, giving you an industry-standard agreement that clearly sets out the rights and responsibilities of both parties.
Straight answers and realistic timelines — you'll always know what's actually involved.
No cut corners. Every build meets Tasmanian standards and then some.
One point of contact throughout — you always know what stage your project is at.
Meticulous to a fault — every tool has its place, every site is left tidy at the end of the day. Order on site is what attention to detail actually looks like.
Licensed Building Services Provider, No. 786933135 (Tas. Dept of Justice).
Certified Passive House Tradesman
3+ years held
Master Builders Tasmania
Member
pro clima Trained Installer
Airtightness & weatherproofing systems
Read Our Google Reviews“We recently completed renovations with Oscar and the OTJ Building team and were impressed with their service and attention to detail. Oscar managed all the trades efficiently and even came to the house after hours when we had a leak to help problem solve and get it fixed. Oscar is passionate about building high quality homes and is really approachable, even with our young kids around he managed to keep the work up and make them laugh! I would work with Oscar again.”
Michael Loubser · Renovation client, Google review
If you’re planning a new home, custom build or renovation anywhere in Northern Tasmania, get in touch for a no-obligation chat.
Start Your EnquiryOscar Tregaskis-Jago · Builder Licence No. 786933135