SAP Calculations for Extensions

SAP Calculations for Extensions – Guaranteed Compliance no matter How Much Glazing

If you are constructing, converting or extending a property and need SAP Calculations in London or elsewhere in the UK, we can help. These types of calculations can only be issued by trained and qualified assessors.

At Assessment Hive, we prioritise customer service, valuing politeness, consideration, and punctuality when working on a customer’s property. Count on us to deliver your reports promptly and efficiently, ensuring they are ready when you need them.

What are SAP Calculations and are they needed for extensions?

SAP stands for ‘Standard Assessment Procedure’ and is the government’s method for calculating the energy performance of dwellings.

In the case of extensions, SAP calculations, also known as heat loss calculations, are used to assess the energy efficiency of a house extension and determine if it complies with Building Regulations.

A SAP Calculations for an Extension is only needed when the glazing area of the extension is more than 25% of the new floor area. This means large extensions with very little glazing will not need an SAP Calculation, but those with more glazing will.

SAP calculations compare the carbon emissions of the existing house and proposed extension (Actual Dwelling) to the existing house plus a notional extension (Notional Dwelling). Moreover, the notional extension would only have the 25% glazing allowance. To demonstrate compliance, the carbon emissions of the Actual Dwelling must be equal to or lower than the Notional Dwelling.

How quickly can I have my SAP Calculations

It depends on the size of your property however; on average it takes about 3 days to complete. We will require a full set of plans and building details to start the process.

If you need an SAP energy performance certificate for a property in Hertfordshire, Kent, Essex, London or anywhere else in the UK – Assessment Hive can help.

Instant Quote

I have been using Assessment Hive for quite some time now. I find them very friendly, efficient and would definitely recommend their services to others”.
Savvas Eracleous, E & M Solicitors

“Amazing professional service everytime! extremely friendly and helpful staff, reports are done fast and to a high standard. Here at Platinum Estates, we highly recommend this company.”
Lory Godfrey, Platinum Estates

“Amazing service each and every time we instruct! extremely friendly and helpful staff. I had SAP Calculations that needed to be done urgently. These were carried out the next day and certificates issued that day, Thanks so much”
Mehmet Bekir, Builder/Developer

SAP Calculations for Extensions