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

Site location, proposed drainage context and access details help plan an infiltration testing visit.

New homes commonly need an EPC as part of completion, handover or compliance steps.

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

Leaving site testing late can create avoidable programme pressure where drainage decisions are already critical.

Leaving the certificate late can create avoidable friction close to transaction or occupation deadlines.

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

Booking early helps align site access, ground conditions and the wider drainage design programme.

SAP and EPC are connected, but they sit at different points in the compliance and handover process.

If a plot fails, the practical next step is to review likely leakage points and plan a retest efficiently.