SAP Calculations

We are happy to carry out SAP Calculations for extensions and conversions all over the UK, regardless of the size or complexity as there is nothing out of our remit.

Contact us for an instant quote on 0117 287 2899

What we offer

Focus 360 have a strong history in providing SAP Calculations for extensions and conversions. Our highly qualified building surveyors will undertake SAP Calculations from supplied plans and construction specifications and ensure that all new and existing features are taken in to account.

We will always consult and advise several variations on how to get the job done, working with you every step of the way. A typical example, could mean leaving existing walls and floors untouched and where new heating systems may need extra consideration to pass.

We are happy to deal with your building control officer directly to understand what is required and take care of everything, so that you don’t have too.

Do I require SAP for an extension or renovation?

Yes. You will require SAP calculations whether you are extending, renovating or changing the use of a property you will need to ensure that your specifications meet the requirements of building control. (Part L1B in England and Wales and technical handbook section 6 in Scotland).

SAP Calculations


Building regulations state that any new floor space within an extension should not have more than 25% of glazed areas.

Of course, many extensions have more than this and therefore as standard would fail the assessment.

We can help and assist you in getting around this issue quickly and hassle free.


Conversions may be defined as creating a new dwelling from an existing building. For example, changing an office building into flats or converting a barn.

In this case you need to ensure that the required U-Values are met and the new heating system meets all minimum efficiencies.


If you are planning on building a conservatory that is thermally separate from the dwelling, it will be treated as an extension and therefore require SAP calculations.

Please refer to above.

Air Testing 

Sound Testing

Water Calculations

Do you need SAP calculations for a new build?

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Get in touch to request a free consultation

If you would like to discuss your requirements further, but prefer meeting face to face, please fill our your details and we will get back to you as soon as possible (usually within one working day)