Infiltration testing provides site-specific evidence to help drainage design and planning decisions.

Turnaround depends on access, property type, urgency and assessor availability.

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.