EPCs
Energy Performance Certificates (EPCs) provide an independent assessment of a building’s energy efficiency, assigning a letter rating from A to G and identifying opportunities for improvement. EPCs are a legal requirement for most new builds and lettings. They play a key role in demonstrating compliance with current building regulations.
We can arrange and coordinate EPC assessments for both residential and commercial properties, ensuring accurate calculation and certification - aligned with regulatory requirements. If your project requires an EPC as part of planning, completion or compliance documentation, we'd love to hear from you!
SAPs
Standard Assessment Procedure (SAP) calculations are used to assess the energy performance and carbon emissions of new residential dwellings in the UK. SAP forms the basis of Building Regulations Part L compliance and is required to demonstrate that a proposed dwelling meets current energy efficiency standards.
SAP assessments evaluate factors such as fabric performance, heating systems, ventilation, solar gains, and renewable technologies to produce an energy rating and carbon emission calculation. The outputs inform both regulatory approval and the production of Energy Performance Certificates (EPCs).
SBEMs
Simplified Building Energy Model (SBEM) calculations are used to assess the energy performance and carbon emissions of new and refurbished non-domestic buildings in the UK. SBEM forms the basis of Building Regulations Part L compliance for commercial properties and is required to demonstrate that a building meets current energy efficiency standards.
SBEM assessments analyse building fabric, HVAC systems, lighting design, controls and renewable technologies to determine predicted energy use and carbon output. The results are used to confirm compliance with regulatory targets and to produce Energy Performance Certificates (EPCs) for commercial buildings.
Thermal Modelling
Thermal modelling provides a dynamic assessment of how a building performs under varying environmental conditions. Using detailed simulation software, it evaluates temperature behaviour, solar gains, heat loss, ventilation performance, and system interaction over time.
Unlike simplified compliance calculations, thermal modelling offers a more granular analysis of building performance, helping project teams understand how design decisions impact comfort and regulatory compliance.
Thermal modelling is often used to support Part L compliance, overheating assessments and energy strategy development, particularly on complex or high-performance projects.
Overheating Assessments
Overheating assessments evaluate the risk of excessive internal temperatures within a building, ensuring occupant comfort and regulatory compliance. With increasing focus on climate resilience and building performance, overheating analysis has become a critical component of residential and certain non-domestic developments.
Assessments are typically carried out using dynamic thermal modelling in accordance with recognised methodologies such as CIBSE TM59 (residential) and TM52 (non-domestic), or under Approved Document Part O where applicable. By analysing solar gains, ventilation strategy, occupancy patterns, and building fabric performance; overheating assessments help identify potential risks early in the design process and support informed mitigation strategies.
Water Efficiency Calculations
Water Efficiency Calculations assess predicted potable water consumption within a development to demonstrate compliance with Building Regulations and (where applicable) local planning authority requirements. For residential projects, calculations are typically undertaken in accordance with Approved Document Part G, confirming that internal water usage meets the prescribed "litres-per-person-per-day" targets. Some local authorities may impose more stringent requirements than the national baseline.
Water efficiency assessments consider sanitaryware specifications, fittings, flow rates and occupancy assumptions to ensure compliance is achieved without compromising performance or usability.
Whole Life Carbon Assessments
Whole Life Carbon (WLC) Assessments evaluate the total carbon impact of a building across its entire lifecycle, from material extraction and construction through to operation, maintenance, and end-of-life. Unlike operational energy calculations alone, WLC assessments consider both embodied carbon (associated with materials and construction processes) and operational carbon (from energy use over time). This provides a comprehensive understanding of a building’s environmental impact and supports more informed, low-carbon design decisions.
Whole Life Carbon reporting is increasingly required by planning authorities and is becoming a key component of sustainable design strategies, ESG reporting, and net-zero carbon commitments.
Energy & Sustainability Statements
Energy & Sustainability Statements are formal planning documents that outline how a proposed development will meet energy efficiency, carbon reduction, and any specified environmental performance requirements.
These statements typically summarise compliance with Building Regulations, local planning policy and sustainability targets, drawing together outputs from SAP, SBEM, thermal modelling, overheating assessments, water efficiency calculations and whole life carbon assessments.
Prepared to support planning submissions, they demonstrate a clear strategy for reducing energy demand and limiting carbon emissions with the benefit of ensuring the improvement of overall environmental performance.