ABOUT OB1

We built the system we wished we’d had

OB1 started on a slab in Margaret River with a spreadsheet, a whiteboard and a lot of phone calls. We built the system we wished we’d had: the estimate, the program and the supervisor, in one place, for the way houses are actually built in Australia.

A finished home at dusk with OB1 open on a laptop on the site plans

Our story

One build, programmed by hand

In 2023 our founder programmed his own build — St Alouarn Place — by hand: 12 stages, 160 tasks, dependencies on sticky notes. The program worked. The process didn’t scale.

The program became templates

So we turned that program into templates: task templates, dependency templates, modifier templates, cost codes, procurement and checklists.

Sixty-two revisions later

The OB1 Master Workbook is the engine behind every estimate and program in the app.

Then we added a supervisor

The part a spreadsheet can never do — a supervisor that reads your drawings, watches your lead times and tells you what to order this week.

WHAT WE HOLD TO

Four rules behind every screen

Numbers come from the engine

Every cost and date is calculated in one place, so the estimate, the program and the AI never disagree.

Australian rules

Australian terms, GST, working calendars and the way homes are really built here.

Trades on your side

Clear orders, dates and messages make you the client trades want to work for.

Your data is yours

Your projects are stored in Sydney and stay under your control.

160+tasks in a full construction program

16stages from pre-construction to handover

Rev 62of the engine behind every number

Sydneywhere your project data is stored

The team

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Building soon? Let us show you how OB1 would run it.

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