What the main project contains
The main project is coordinated architecture and engineering documentation for the permit procedure. It is not concept design without limits.

The main project is not more detail on the same sketch. It is a coordinated technical whole.
What it is for
The main project turns an agreed concept into a technical package an authority can review. Inputs are the concept design (or equivalent agreement) and plot analysis. Output is documentation for the building permit, within agreed scope.
What usually sits in the package
Architecture: site plan, floor plans, sections, elevations, technical description. Structure and services as the intervention requires. Specialist reports required by site and regulation. A clear submission version.
What it is not
Not a contractor bill of quantities. Not the execution set for a build contract. Not a guarantee of approval timing. Not a place for large programme changes without a written amendment.
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Coordination
Most supplements come from misalignment between architecture and structure or services. The office leading the main project must hold one version of truth.
When to start
When the concept is approved. When ownership and location inputs are clear enough. When exclusions are written. Before that, the main project spends money on assumptions.
Questions around this topic
- No. Concept tests spatial decisions. The main project is the coordinated technical package for the permit procedure.
- Those required by the intervention and regulations. The discipline list is written in the proposal.