Typical appointments
- New residential and non-domestic buildings
- Extensions, conversions and refurbishment where applicable
- Early energy-strategy and option decisions
- Design changes with an energy or compliance impact
Energy and compliance
Part L compliance
Building energy compliance developed alongside architecture, fabric and MEP system decisions.
Service overview
Assessment connected to design decisions
Part L compliance is a coordinated design activity. Fabric performance, air permeability, heating, cooling, ventilation, lighting, controls and renewable systems need to be considered together with the required evidence.
MEPX helps define the assessment route, assumptions, information responsibilities and design actions appropriate to the project stage.
Scope note Applicable assessment, evidence, lodgement and third-party responsibilities are confirmed for each commission.
Project fit
When the service is useful
Information to begin
- Building type, location and scope of work
- Architectural geometry and fabric specification
- Proposed MEP systems and controls
- Project programme and approval strategy
Technical scope
Outputs and design considerations
Typical deliverables
- Compliance-route and responsibility review
- Coordinated inputs and assumptions register
- SAP or SBEM assessment support as applicable
- Design actions and evidence requirements
Design considerations
- Fabric and thermal-bridge performance
- System efficiencies and controls
- Commissioning and handover evidence
- Interaction with ventilation, overheating and planning targets
Common questions
Before commissioning the work
Is Part L only an energy-model calculation?
No. Compliance depends on coordinated fabric, building-services, controls, commissioning and evidence requirements. The exact route depends on the building and work type.
When should Part L be considered?
It should be considered during briefing and concept design so energy targets influence fabric, plant, lighting and controls before spatial and technical decisions are fixed.
Does MEPX cover domestic and non-domestic projects?
MEPX can support residential and non-domestic design workflows. The required SAP, SBEM, certification and specialist responsibilities are confirmed for each commission.
What happens if a design is not meeting the target?
The assumptions and model can be reviewed to identify influential factors and compare practical improvement options with the wider design team.
Project discussion
Confirm the assessment route early
Share the building type, location, design stage and available information. MEPX can identify the likely assessment scope and information needed to proceed.