New Build SAP Calculations and Extension Projects from just £150
SAP Calculations for New Build Compliance
Energy efficiency is a key part of modern housing design. Every new dwelling in the UK must undergo a SAP calculation to show compliance with Part L of the Building Regulations, unless special exemptions apply. At sap2sbem, we provide fast, accurate, and cost-effective SAP assessments that keep your projects on track.
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Prices from just £150
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SAP Calculations for New Build houses and flats
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SAP Calculations for Extensions
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London Plan compliant SAP Calculations
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Predicted Energy Assessments (PEA's)
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Energy Performance Certificates (EPC's)
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Energy Statements & Overheating Compliance
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Problem solving of non-compliant SAP calculations
When is a SAP calculation required?
You will need a SAP assessment for:
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All new-build residential dwellings
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Extensions with excessive glazing (where glazing exceeds 25% of floor area)
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Conversions or change of use into dwellings (e.g. barn conversions, office-to-residential)
What’s included in our SAP service?
Our SAP calculations cover everything you need for Building Control approval and energy compliance:
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U-value calculations for walls, floors, roofs, and glazing
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Overheating checks (Part O where applicable)
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Predicted Energy Performance Certificates (EPCs)
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Compliance with COâ‚‚ emissions and fabric energy efficiency targets
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Liaison with Building Control to ensure approval
Our SAP calculation process
We keep the process simple and stress-free:
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Send us drawings & specifications – including floor plans, elevations, and construction details.
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Initial modelling – we run the SAP calculation and highlight any areas where performance can be improved, should that be necessary.
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Design feedback – Although we are not designers, you’ll receive clear, practical guidance to ensure compliance whilst considering the cost.
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Design Stage SAP report & PEA – once the design is fixed, we issue compliance reports for submission to Building Control, including the PEA (Predictive Energy Statement. Its also at this time we may also supply additional calculations, such as U Value Proposals, Energy Statements, Climate Change and Sustainability Reports, Part G Water Efficiency Calculations or Part O Overheating Calculations
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As Built SAP report and EPC - As construction concludes, we will gather all the 'As Built' project information and release the AS Built SAP and EPC (Energy Performance Certificate) to complete the process.
Why choose sap2sbem for SAP calculations?
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Competitive pricing – SAP calculations from just £150, usually capped at £500 for complex large projects.
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Fast turnaround – initial results within 48 hours in most cases
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Expert advice – accredited assessors with experience on hundreds of projects
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Support from design to completion – we stay available throughout the build in case changes arise
Linked services
If your project includes non-domestic areas, you may also need an SBEM calculation and BRUKL report. For guidance on the differences between SAP and SBEM, see our blog: SAP vs SBEM — what architects need to know.
Get your SAP quote today
Ready to get started? Contact us today for a free consultation. Call 07800 654321 or use our online form to request your SAP calculation.
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SAP Calculations '101' and tips to get a better result on your project
SAP (which stands for Standard Assessment Procedure) Calculations are required on most New Build Properties and some Extensions due to Part L of the Building Regulations (you can read more about Part L in detail through the link). In short, its a requirement by the government that all New Build Dwellings in the UK have a SAP calculation. That's interesting, as in some circumstances it also means a SAP Calculation is required for an extension to an existing Buildings or even in a Building Conversion project. The building works cannot (or should not!) start without these calculations.
What is a SAP Calculation aiming to achieve?
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The basic idea is that the UK is trying to get all new buildings to be as energy efficient as possible and thus reduce the carbon footprint we are producing. For this reason, on 15th June, 2022 SAP Calculations underwent a major over hall to SAP 10. This has significantly affected the SAP Calculations for new builds, extensions and conversions. Please click here for a detailed break down of SAP 10 if you were familiar with SAP Calculations previous to this date but aren't sure of what's changed..
There are basically three stages of SAP Calculations required for any new build project, whether New build, Extensions or conversions:
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'As Designed' SAP Calculations
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'As Built' SAP Calculations
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'EPC' (Energy Performance Certificate)- Produced from the As Built SAP Calculations
As the SAP Calculations are taken from the buildings plans and specifications, at present there is generally no need for me to visit the property as most, if not all, of the required information can be gathered from remotely.. In this webpage I will explain in detail what are each of these SAP Calculations are and also what is required for SAP Calculations for extensions and SAP Calculations for conversions.
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What are Design Stage SAP Calculations? Step by step guide below:
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To be able to produce SAP Calculations you (or your representative, architect, builder etc.) will need to supply us with the following information:
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Detailed Scaled Plans with North Orientation
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Scaled Elevation Drawings
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Planned Heating,, air-con and ventialtion (HVAC) Specifications
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Planned Water Heating Speciifcations
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Planned Lighting Specifications
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Any renewable technology you plan to fit
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Detailed Specification of the Building Fabric, (ideally with planned building products works best)
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Details for planned windows and doors, skylights etc.. and thermal bridging
I compile this detailed information and enter the calculations into an approved government software (SAP) to see if the planned building or extension complies with Part L of the Building Regulations. These are important calculations as the actual building will be measured against them, and any deviation from these (Intentional or unintentional!) may lead to the actual building or extension not passing and expensive remedial works needed in order for the building to comply! Thankfully though, you will be please to know that would be impossible if the plans and specifications are implemented correctly. Another reason to make sure you have a reliable builder and project manager for your project!
Occasionally, the submitted plans don’t meet Part L for various reasons and that's when I will work with you or your architects to quickly find solutions that work but are also practical and cost effective.
If I am also instructed to carry out the ‘As Built’ SAP Calculations, during the build, with you permission I like to keep close contact with the project manager or architect and am happy to recalculate any potential changes to the project along the way to ensure all is smooth and we still comply when we get to the ‘As Built’ Stage.
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All you need to know about ‘As Built’ Stage SAP Calculations
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Once the project has been completed, we will need to prove that everything we calculated at the ‘AS Design’ SAP Calculations stage has been installed and the beautiful new finished building still complies. If everything has been built to plan, that is relatively straight forward however it can be more challenging if there have been changes that I don’t know about so, please, keep me informed through the project of any changes! Remember I am here to support you and want the project to comply as much as you do. Once we have achieved compliance I will send you an ‘As Built Sign Off’ Document which you or your representative will sign to confirm the project is built to the discussed details (Including any changes we made on the way!) and complies with Part L of the Building Regs.
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At this stage I will also need other supporting documents to produce the ‘As Built’ SAP calculations such as:
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The air tightness certificate
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Thermal Bridging Junctions Checklists or Illustrations
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Microgeneration Certificate Scheme (MCS) Certificates ( If applicable)
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Heating/ Ventilation commissioning Certificates.
Energy Performance Certificate (EPC) Report
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This Certificate contains the multi-coloured energy graph many are now familiar with and information about the property presented in an ‘easy to read’ format. The SAP Energy Performance Certificate (New Build EPC) is different to the RdSAP EPC used in existing buildings and can only be produced using the details provided in the ‘As Built’ information by an ‘On Construction Domestic Energy Assessor’ (OCDEA). It is easier for me to produce the EPC if I have calculated the building at the previous stages, however I am qualified and experienced in existing and new building assessment so can advise you correctly if there is any uncertainty which type of EPC is required. In certain circumstances I can produce an EPC on a new build property without having been involved in earlier stages of the project.
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In September 2020, the government launched a new Energy Performance for Buildings Register for England, Wales and Northern Ireland (Note not Scotland- It is a different register). The EPC will be stored and accessed from here and is valid for 10 years, regardless of how many times the property is sold or rented.
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I would love to be involved in your next project. Why not fill in the online form or call me for a chat on 07800 654321 to see how I could help your project successfully meet the standards. I am between the UK and Spain but my mobile number is UK rates.
