SAP Calculations for Conversions

Whether you are converting a non-residential building into a residential dwelling, splitting a large house into self-contained flats, or vice versa, you will require a Part L1B SAP Calculation to demonstrate that Building Compliance has been achieved.

Achieving L1B Compliance for Conversions

Unlike SAP Calculations for New Builds,  SAP Calculations for Conversions do not require DER (dwelling emission rate) and TER (target emission rate) calculations.

At the design stage, we will produce SAP Calculations and a PEA (predicted energy assessment), and work with you to ensure that the proposed conversion meets the L1B Building Compliance requirements. Once the conversion is complete, we will carry out As-Built calculations to produce a valid Energy Performance Certificate (EPC) for the new dwellings.

conversion sap calculations

Working With RS Energy

At RS Energy, we always go the extra mile. We will not charge extra for revisions and will advise you on best practices for gaining compliance, providing the necessary guidance and advice to ensure that your project advances smoothly throughout. 

Frequently Asked Questions

Do I need a SAP Calculation for a Conversion?

SAP Calculations are required for converted dwellings that are a result of a ‘Material Change of Use’ or ‘Change of Energy Status’, as stated in Part L1B of the Building Regulations. 

When are SAP Calculations for Conversions Required?

As stated in Part L1B of the Building Regulations, SAP Calculations are required for converted dwellings that are a result of a ‘Material Change of Use’ or ‘Change of Energy Status’.  

What are SAP Calculations?

Standard Assessment Procedure (SAP) is the government adopted methodology for calculating energy performance in domestic properties. Introduced into Building Regulations in 1995, this is a vital step towards improving the energy performance of buildings, and reducing CO2 emissions.

Why Are SAP Calculations Required?

SAP Calculations are required in order to increase energy efficiency, and reduce CO2 emissions in domestic buildings.

With over 40% of energy use in the EU being directly attributable to the operation of buildings, and 44% of the UK’s carbon emissions resulting from buildings, addressing energy use and emissions in buildings has the potential to make a substantial difference to the overall energy usage and total carbon emissions in Europe.

The last government made a legally binding commitment to reduce greenhouse gas emissions by 80%, relative to 1990 levels, by 2050.  As a result of these efforts to address greenhouse gas emission rates, more stringent regulations around building emissions are now in force.

Request a quote

Complete our quote form today. By working with RS Energy you’ll enjoy the following benefits.

No additional charge for revisions

We’ll help you gain the compliance ensuring you’re not left stranded

We go that extra mile for all of our clients

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