New BuildSAP Assessments

Find out how Vision Energy can take care of all your compliance needs for your new Build Project

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ConversionSAP Assessments

Vision Energy can take care of your energy assessments for your conversion project, find out more today

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ExtensionSAP Assessments

All Extensions with 25% or more glazing compared to the floor area require SAP & EPC's, find out more

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New Build
SAP Calculations

Vision Energy are a leading supplier of Energy Assessments & Compliance testing to ensure compliance with Building Regulations, From Design stage all the way through to completion, Have a chat with one of our technical team to see how we can help you

Sustainability & Energy Services

Vision Energy are a leading Sustainability & Energy consultancy working nationwide, We specialise in calculations & reports covering Building Regulations, Planning Permission and all other sustainability or energy needs within the construction sector, With a vast amount of knowledge and experience having worked on thousands of projects across the UK, one of our engineers would be more than happy to assist you on your project. SAP Calculations | SBEM Calculations | Energy Statements | BREEAM Assessments | M&E Design | EPC's | Water Efficiency | Air Permeability

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New Build SAP Calculations & EPC's

Vision Energy will work with you on your new build project from design stage all the way through to completion, from single dwellings to new build developments with 100+ dwellings, Vision energy strive to ensure that all assessments are completed to achieve compliance as well as providing cost effective and feasible solutions to ensure the smooth delivery of your project.

All assessments come with

  • Dedicated energy assessor,
  • Free U-values for Wall, Floor & Roof elements
  • Commitment to achieve compliance without applying costly or solutions that will prolong the build proccess

Vision are more than happy to assist you on all aspects from planning to building control sign off, get in touch to talk to one of our technical team to ensure that your project achieves compliance to Building Regulations Part L1a


Building Regulations Part L1a
New Build Dwellings

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What are New Build SAP Calculations & EPC’s?

Building Regulations Part L1a requires all new build dwellings to undergo SAP (standard assessment procedure) calculations to measure the energy efficiency of the dwelling in order to conform to Regulations. 

SAP calculations measure the annual energy’s costs of a new dwelling, the calculations assess heating elements (including water heating), Ventilation and lighting elements of the dwelling/s, in doing so the annual C02 emissions for the dwelling/s are calculated.

What Elements are assessed during SAP Calculations?

When SAP Calculations are carried out on all dwellings, a number of factors are used to calculate the energy cost & C02 emissions, below is an overview of the elements included within every SAP Calculation,

  • Thermal efficiency of Walls, Floors & Roof elements

  • Thermal efficiency of glazing & doors

  • Boiler efficiency

  • Secondary heating i.e. log burners, open fires

  • Renewable energy i.e. solar panels, Air/ground source heat pumps

  • Air Tightness of the dwelling

What is the target a dwelling needs to meet?

When it comes to achieving compliance, no set standard is in place that a dwelling needs to meet. instead, During the SAP (standards assessment procedure) Calculations the target will be calculated based on a number of factors such as dwelling size, orientation, design & layout. Therefore each dwelling has a completely unique target to achieve, Based on the target being unique to each dwelling Vision Energy recommends completing your calculations at a design stage.

How does the overall process work throughout the design and build process?

Vision Energy recommend carrying out your SAP Calculations at a design stage, however if your dwelling/s is already complete don’t worry, we can still carry out your SAP Calculations at an ‘as-built’ stage, below outlines the step by step process Vision Energy will take to ensure compliance to Building Regulations Part L1a,

Initial Design Review – Vision will review the plans and information provided within architectural drawings or specifications

Design Stage Calculations – Design calculations will be carried out to review the compliance to all elements in Building Regulations

Design Review & Alterations – Were required, Vision will advise on any alterations that are required to the design of the dwelling/s to comply with Building Regulations Part L1a, ensuring that the design alterations are cost effective and feasible on site,

Design SAP Calculations & Predicted EPC – Vision will issue the design stage calculations and predicted EPC for submission to Building control/Local Authority

As-Built SAP Calculations Review – Once the construction of the dwelling/s is nearing completion, Vision Energy will review the construction details compared to the design SAP Calculations to ensure the dwelling/s have been built to the specification, If any alterations have been made, Vision will rerun the calculations and review compliance

As Built SAP Calculations & EPC – Once the review has been complete and confirmed, Vision Energy will issue and lodge the As-built SAP Calculations & EPC for submission to Building Control/ Local Authority

Highlighted Project

SAP Calculations, EPC, MEP   

Multi-dwelling Housing Development