About Us

Built on honesty.
Delivered on time.

Build Demo was founded with one conviction: that residential construction in Sydney could be done without the surprises, the excuses, and the extras that come standard with most builders. Eight years and 500 homes later, we still operate that way.

The honest version of how we got here.

Founder James Thornton spent fifteen years working for large residential builders before he stopped being able to defend what he was selling. The plans were designed to be built quickly, not lived in comfortably. The contracts were priced to look competitive, then varied to be profitable. The warranty calls went unreturned.

Build Demo was his answer: a smaller, more deliberate operation where he could personally stand behind every project. The first five builds were all referrals from the first client. That pattern has held.

Work With Us
2016
First project completed in Kellyville
2018
Expanded to duplex and multi-dwelling
2021
200th home delivered
2024
Team of 50+ specialists, 500+ homes
How We Work

The things that aren't negotiable.

We don't start with a catalogue — we start with your family
Fixed-price contracts that actually stay fixed
Every trade on site answers directly to us
Weekly written updates, no chasing required
Open site access any time, any day
5-year structural warranty on every build
The Team

The people you'll actually deal with.

James Thornton
Founder & Lead Builder
30 years experience
Sophie Marchetti
Head of Design
15 years experience
David Okafor
Structural Engineer
20 years experience
Mei Lin
Client Experience Manager
10 years experience