Part L Calculations (SBEM) for Building Regulations Compliance

Part L Calculations for New‑Build & Conversion Projects

Part L Calculations are a mandatory requirement for new‑build commercial properties, extensions, and certain change‑of‑use projects. We provide fast, accurate SBEM calculations to demonstrate compliance with Building Regulations Part L (Conservation of Fuel and Power), ensuring your development meets current energy‑efficiency standards.

Whether you’re a developer, architect, builder, or property owner, our service delivers clear, reliable results with full guidance from start to finish.

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What Are Part L Calculations?

Part L Calculations assess the energy performance of a building at the design stage. They are required to:

  • Show compliance with Building Regulations
  • Demonstrate that the building meets minimum energy‑efficiency standards
  • Identify improvements before construction begins
  • Produce the final EPC upon completion

For non‑domestic buildings, this process is carried out using SBEM (Simplified Building Energy Model).

When Are Part L Calculations Required?

You will need Part L Calculations for:

  • New‑build commercial properties
  • Extensions over 100m²
  • Material changes of use
  • Conversions and refurbishments that affect thermal elements
  • Buildings undergoing major services upgrades

If you’re unsure whether your project requires Part L, we can confirm this quickly.

What’s Included in Our Service

Our Part L / SBEM package includes:

  • Full design‑stage SBEM calculations
  • Building Regulations compliance report
  • Recommendations to achieve compliance if the initial design fails
  • You will need to liaise with your architects, builders, and building control
  • As‑built SBEM calculations
  • Final Commercial EPC on completion

We ensure your project passes Part L with minimal disruption and clear, actionable guidance.

Fast Turnaround & Clear Guidance

We understand that delays cost money. That’s why we provide:

  • Rapid assessment turnaround
  • Clear communication at every stage
  • Practical solutions if your design needs improvement
  • Accurate, compliant documentation for Building Control

Our goal is to keep your project moving smoothly.

What We Need to Get Started

To begin your Part L Calculations, simply send:

  • Floor plans, elevations, and sections (PDF Format)
  • Construction details (walls, floors, roof build‑ups)
  • Glazing specifications
  • HVAC and lighting details (if available)
  • Site address and project timeline

If any information is missing, we can guide you through what’s required.

Get a Quote for Part L Calculations

We provide competitive pricing for projects of all sizes, from small commercial units to large multi‑use developments.

Contact us today for a fast, accurate quote and expert support throughout your project.