Built To Last.
Driven By Excellence.
Premium roofing and cladding solutions across Sydney.
Quality. Integrity. No shortcuts.
Our Services
Roofing &
Cladding
Experts
Complete roofing and construction services for residential, commercial and strata.
View All Services
Why Choose Ontra
We Don't Cut Corners.
We Raise Standards.
We take pride in delivering exceptional results that last. Our core values are at the heart of everything we do.
Integrity
Honest advice. Clear communication. No hidden agendas.
Quality
Premium materials. Expert workmanship. Built to last.
Reliability
On time. Every time. You can count on us.
Safety
Safe work sites. Protecting our team and our clients.
Accountability
We own our work. If it's not right, we make it right.
Recent Projects
Built Different.
Built To Last.
Commercial Roof / Gutters & Downpipes
Rouse Hill, NSW
Re-roof / Re-gutter & Downpipe
Kingsford, NSW
Commercial Cladding
Haberfield, NSW
Tile to Metal Reroof
Castle Hill, NSW
Custom Home
Gledswood Hills, NSW
Strata Roofing
Gladesville, NSW
“ONTRA Construction were professional from start to finish. The quality of work and attention to detail is second to none. Highly recommend to anyone looking for a reliable roofing team.”
Daniel M.
Mosman, NSW
“The Ontra Crew working with JSJ Roofing came and replaced my roof. Fantastic job, beautiful work, clean and professional. Rare to see such care taken, awesome work.”
Rob Wensing
Re-roof, Sydney NSW
Our Partners
Trusted Industry
Partnerships
We collaborate with Sydney's most respected suppliers and specialists to deliver uncompromising quality on every project.
