Your Outdoor Area Deserves to Be Done Right
Premium deck replacements, pergolas, and outdoor entertainment renovations. Josh McKenzie personally manages every project from first call to final nail.
Premium Outdoor Living Renovations
We specialise in transforming tired outdoor areas into beautifully designed, low-maintenance spaces you'll actually use.
Deck Replacement and Composite Decking
Full removal of old unsafe decking and replacement with premium composite or hardwood systems. Modern, durable, and zero maintenance.
Pergolas and Insulated Roofing
New pergola structures with insulated roofing panels or EPS systems. Weatherproof, energy efficient, and year-round usable.
Outdoor Entertainment Areas
Complete outdoor living spaces including aluminium balustrades, privacy screens, outdoor stairs, and motorised screens. Everything as one complete project.
Every Project is Owner-Led
JMC Build is a premium residential building company based in Thornleigh, servicing Sydney's Upper North Shore and surrounding suburbs.
Josh McKenzie has 20+ years of experience across carpentry, residential building, and outdoor construction. He personally oversees every project from the initial site visit through to final completion. You won't be passed off to a site manager or a subcontracted crew.
We specialise in substantial outdoor transformations for established homes. Our clients are homeowners who want quality done right the first time, clear communication throughout, and a builder they can actually trust.
Projects We're Proud Of
Before and after transformations on Sydney's Upper North Shore. Every project managed personally by Josh from start to finish.
Homeowners Who Had It Done Right
Before and after photos, completed project walkthroughs, and real client experiences available on request.
"We had an old timber deck that was completely unsafe. Josh came out, assessed everything, gave us a clear quote and the whole project was finished on time. Couldn't believe the difference."
"The communication throughout the entire project was excellent. We always knew where things were at. The finished pergola and decking is exactly what we had in mind."
"We had a complete outdoor transformation. Old decking, leaking pergola roof, the lot. JMC handled every part of it. The result is better than we imagined. Worth every cent."