Technical insight

When is an SBEM assessment required?

How SBEM supports Part L compliance for non-domestic projects and where early inputs make the biggest impact.

What SBEM does

SBEM is the non-domestic Part L route where project type and method require it. It checks services, fabric and control assumptions in one model.

Where assumptions matter most

Geometry, fabric, systems, occupancy and controls must align before late-stage submission. Late edits usually carry the highest programme and cost risk.

Confirm route early

Confirm method, stage and building-control route before detailed design, because complex schemes often need additional parallel assessments.

General technical guidance for England. Requirements, assessment routes and responsibilities must be confirmed for the specific building, location and commission.