The Standard Assessment Procedure (SAP) is the methodology required by the Department
of Energy & Climate Change (DECC) to assess and compare the energy and environmental
performance of dwellings. Its purpose is to provide accurate and reliable assessments
of dwelling energy performances that are needed to underpin UK energy and environmental
SAP works by assessing how much energy a dwelling will consume and how much carbon
dioxide (CO2) will be emitted in delivering a defined level of comfort and service
provision, based on standardised occupancy conditions. This enables a like-for-like
comparison of dwelling performance.
SAP is a Government approved calculation that is required to demonstrate compliance
with Part L1A & L1B of the Building Regulations. It is a calculation of the
energy performance of a dwelling and is required for all new homes. It is also
an acceptable methodology when adding highly glazed extensions or un-separated
There are 2 stages to the SAP assessment process:
Stage 1 - the 'Design'
stage - must be calculated and submitted to the relevant Building Control
Officer (BCO) or your Approved Inspector (AI) at the point when you make
your Building Control Application.
Stage 2 - the 'As-built'
stage - comes into force when the build is completed. A 'pass' certificate
must be produced for presentation to your BCO or AI. Any changes that were
made to the build specification must be incorporated in the "As Built"
assessment. Your final On Construction EPC will be based on the information
confirmed at this stage.
All you need to do is provide us with scale drawings, building, heating, hot water,
ventilation and lighting specifications and we can do the rest for you.
G Building Regulations Water consumption calculations
The Government updated Part G of the Building Regulations in April 2010.
This sets a whole building standard of 125 litres per person per day for
domestic buildings. This will be specified using the methodology set out
in the 'Water Efficiency Calculator for New Dwellings' also used for the
Code for Sustainable Homes where even tougher standards have to be demonstrated
- down to 80 litres at Code 5/6.
If you are building a new home, you must ensure that it will have a predicted
water consumption of less than 125 litres/person/day using the methodology outlined
in the 'Water Efficiency Calculator for New Dwellings' in compliance with 17.K
Active Energy can complete this calculation for you normally within a few days
of receiving your drawings and details of all the proposed water fittings. The
results of this calculation will have an effect on your SAP Calculations and could
affect your Energy Performance Certificate rating.