SAP calculations - Conversions
If you alter a building such that there is a material change of use, then we can undertake a SAP assessment to demonstrate compliance with Approved Document L1B.
Our experienced assessors can guide you smoothly through compliance, providing all the support required to ensure every dwelling achieves a PASS.
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FAST
– maximum 5-day turnaround on all SAP assessments.
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COMPREHENSIVE
– we will provide you with all the relevant SAP documentation required for compliance with Approved Document L1B. No hidden extras and no hidden charges.
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VALUE
– we aim for every quote to be the most competitive, with large discounts available for multi-dwelling developments.
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EPC
– Energy Performance Certificates are available on completion.
Call now for a quote.
What is a material change of use?
Approved Document L1B defines a material change of use as where, after the change:
- the building is used as a dwelling, where previously it was not;
- the building contains a flat, where previously it did not; or
- the building, which contains at least one dwelling, contains a greater or lesser number of dwellings than it did previously.
What is SAP?
The Standard Assessment Procedure ("SAP") is the Government's approved methodology for calculating the energy performance of dwellings.
How is compliance achieved?
Compliance is achieved provided the calculated CO2 emissions of all the dwellings in the building as it will become are no greater than if each dwelling had been built to the minimum standards of Approved Document L1B.
What happens if my dwelling fails the SAP assessment?
Our assessors will be happy to provide you with a free consultancy service, advising you on all necessary amendments to ensure every dwelling achieves a pass.
How long does a SAP assessment take?
We aim to complete each SAP assessment within five working days.
What do I need to provide to the SAP assessor?
- Floor plans, including building elevation and section drawings;
- Details of the buildings location and orientation;
- Specification for the construction of all floors, roofs and external walls;
- Specification for all windows and doors within the buildings external envelope, including frame material, width of gap (if multiple glazing) and emissivity of glass;
- Details of the primary heating system (such as the make and model of the boiler) and associated controls;
- Details of the hot water system, including cylinder size, details of any insulation to the cylinder and pipes, and associated controls;
- Details of any fixed secondary heating system (such as an open fire place);
- Details of any mechanical extract or ventilation systems (for example, the number of mechanical extract fans);
- The number of standard light bulbs and the number of low energy light bulbs; and
- Details of any renewable technology, such as solar hot water or photovoltaics.
