Under CDM 2015

The Principal Contractor plans, manages and monitors the construction phase. On domestic projects, the duty often sits with the main builder by default.

Under the Building Safety Act

A Building Regulations-focused Principal Contractor role coordinates compliance during construction. On a domestic project, this is normally the main contractor.

What to insist on

A written appointment, a construction phase plan, and named individuals taking responsibility. Without those, accountability evaporates the moment anything goes wrong.