Coordinating multiple plots is easier when unit status and likely test dates are known early.

Late booking or incomplete readiness can create avoidable pressure near handover.

Readiness details, access arrangements and plot information help air tightness testing run smoothly.

The next steps typically move toward compliance sign-off, testing coordination and final certification.

Developers, architects, designers and self-build teams commonly commission SAP Calculations.

Early coordination usually makes SAP smoother on projects with fixed delivery dates.

Late information or specification changes can affect programme certainty close to completion.

Commissioning SAP early helps avoid late-stage design changes and compliance pressure.

SAP Calculations and EPCs are linked, but they serve different roles in the compliance and handover process.

Whether SAP Calculations apply depends on the nature of the works and the compliance route involved.