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SAP Calculations for New Builds
Part L compliant SAP Calculations for new builds, completed by Elmhurst accredited assessors. Fast turnaround for clients nationwide.
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What is a New Build SAP Calculation?
A New Build SAP Calculation is a SAP 10 compliant energy assessment for a newly constructed dwelling. It is used to prove that the design meets the Part L energy efficiency requirements before work starts and that the completed home matches the approved specification once it is built.
The calculation looks at the full fabric and services specification for the new build. This includes wall, floor and roof U-values, glazing performance, thermal bridging, air tightness, heating and hot water systems, ventilation and any renewable technologies. The results are used to check that your Dwelling Emission Rate and Primary Energy Rate meet the targets set by Building Regulations.
For new build homes we provide both Design Stage SAP calculations and As-Built SAP assessments using Elmhurst approved SAP 10 software. All reports are suitable for submission to Building Control and for issuing the final EPC when the dwelling is finished.
What is Included in Our New Build SAP Service
Our New Build SAP service is designed to make compliance straightforward for builders, architects and self-builders. We handle the full SAP 10 assessment and give clear, practical feedback so you know exactly what needs to be done for your house to pass.
- Design SAP calculation for new build homes in England, Wales and Scotland
- Calculation of wall, floor and roof U-values for Part L compliance
- Thermal bridging assessment using supplied junction details or approved schemes
- Heating, hot water and ventilation specification check against Part L minimum standards
- Clear pass or fail summary with targeted recommendations if the design does not meet the target first time
- Reasonable specification revisions at design stage until the SAP passes Building Regulations
- As-Built SAP assessment and EPC at completion as an optional upgrade
- BREL or equivalent Part L compliance reports for submission to Building Control
- Email support for your architect, builder and Building Control officer throughout the project
Pricing for New Build SAP Calculations
New build SAP Calculations are charged per dwelling with fixed, transparent pricing. The design stage SAP and the As-Built SAP with EPC are treated as separate stages so you only pay for what you need. Discounts are available for multi plot developments with similar designs.
New Build SAP 10
From £250 per dwelling for Design Stage SAP 10 calculations that meet current Part L requirements.
New Build SAP + Part O
From £375 for combined SAP 10 and overheating assessments for suitable new build homes.
As-Built SAP + EPC
For £80 per dwelling when we have completed the Design SAP. Includes final SAP update and EPC lodgement.
How the New Build SAP Process Works
The new build SAP process is simple. We keep paperwork to a minimum and provide clear updates at each stage so you know exactly where you stand with Building Control.
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1
Send us your drawings and specification
Upload your floor plans, elevations, sections, site plan and basic construction and services specification through our client portal. If anything is missing we will let you know what is needed before we start.
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2
We complete your SAP 10 Design calculation
We build your SAP model, check it against the current Part L targets and identify any areas that need improvement. You receive a clear pass or fail summary with a list of recommended changes if required. Design changes and revised calculations are included until the dwelling passes.
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3
Submit your reports to Building Control
Once the SAP passes we issue your Design SAP report and Part L compliance documentation. These reports can be sent straight to Building Control so your build can progress without delay.
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4
As-Built SAP and EPC at completion
When the house is finished we update the SAP with the final specification, air test result and photographic evidence. We then issue the As-Built SAP report and lodge the EPC so you have everything needed for sign off and sale.
What We Need for a New Build SAP Calculation
The more detail you can provide at the start, the smoother the SAP process will be. In most cases we can complete the assessment from standard architect drawings and a straightforward construction specification.
- Floor plans with dimensions and room labels for each storey
- Elevations and sections showing floor heights, roof build up and any steps in the site
- A site plan showing orientation, access, parking and any attached or adjacent structures
- Construction build up for external walls, ground floors and roofs, including insulation type and thickness
- Window and door schedule with sizes, U-values and frame types if available
- Heating and hot water specification, including boiler or heat pump model, emitters and controls
- Ventilation details, such as intermittent fans, dMEV, MEV or MVHR systems
- Any renewable technologies, for example solar PV, solar thermal or connection to a heat network
If you do not have all of this information yet, we can work from reasonable assumptions and refine the SAP as the design develops. We will always highlight where assumptions have been used so you can confirm or improve them before you build.
Why Choose Us for New Build SAP Calculations
New build projects need an assessor who understands Part L, OCDEA requirements and the practical realities of building on site. We work directly with self builders, architects and small developers to deliver reliable SAP results without slowing your project down.
- Elmhurst accredited OCDEA using the latest SAP 10 software
- New build SAP Calculations for single plots and small developments across the UK
- Fixed, transparent pricing with no hidden extras or rush fees
- Fast turnaround times with honest timescales from the start
- Unlimited design stage revisions so you can refine the specification with confidence
- Reports written in clear language that Building Control can follow easily
- Direct contact with the assessor, not a call centre or anonymous team
New Build SAP Frequently Asked Questions
How long does a new build SAP calculation take?
Most single new build homes are turned around within two to three working days once we have all of your drawings and specifications. Larger developments or more complex designs may take a little longer, but we will confirm expected timescales as soon as we have reviewed your plans.
What documents do I need to send for a new build SAP?
We need floor plans, elevations, sections, a site plan showing orientation, construction details, your heating and hot water specification and a window and door schedule. Ventilation details and any planned renewables are also helpful. You can upload everything through our client portal.
What happens if my new build fails the SAP calculation?
If the first SAP result does not meet the Part L targets we will explain why and give a clear list of changes that will bring the design into compliance. This may include improving U-values, adjusting glazing, upgrading heating or adding renewables. All reasonable revisions are included in the price.
Do you provide As-Built SAP and EPC for new builds?
Yes. Once the house is completed we update the SAP with the final specification, air test result and photographic evidence, then produce the As-Built SAP and lodge the EPC. If we completed the Design Stage SAP this is available for a reduced upgrade fee.
Will Building Control accept your SAP reports?
Yes. All SAP 10 assessments are completed by an Elmhurst accredited OCDEA and produced from approved software. Our Design SAP and As-Built reports are suitable for submission to Building Control across the UK.
Can you help improve my design to pass SAP first time?
We regularly work with architects and builders at planning and technical design stages. We can advise on fabric performance, heating choices, ventilation and renewables so you can achieve a comfortable, compliant and buildable specification.
Ready to get your SAP Calculation?
All SAP calculations completed by an Elmhurst-accredited OCDEA and accepted by Building Control nationwide.