Offices Nationwide 

Cardiff - SAP Calculations - 029 2193 0147

The counties covered by this office are:
Dyfed, Avon, Powys, Gloucestershire, Gwent, Swansea County, Carmarthenshire, Pembrokeshire, Glamorgan,

Phone Number: 029 2193 0147 Email:

How Is A SAP Assessment Undertaken?

Amongst other things, the SAP assessor will determine how good the thermal elements are in the floors and walls as well as how well heat passes through these elements - this is known as a 'U' value. A high 'U' value represents a high amount of heat lost - this is used in the SAP calculation which is done off-site but requires plans and drawings of the site in order to be calculated.

The crucial information needed for the SAP software relates to the type of dwelling, floors, walls, the roof, windows, doors, lighting, renewable technologies, 'U' values, hot water and ventilation. With this, we can determine if a building complies with Building Regulations in Cardiff.

What Is A SAP Calculation?

A SAP calculation, the Government's Standard Assessment Procedure for Energy Ratings, is required to produce an On Construction EPC (Energy Performance Certificate) or a Predicted Energy Assessment (PEA).

The higher the SAP rating, the lower the cost will be to run the building. The score represents the cost of energy required by a property over the course of a year with a 100 score meaning there's no energy cost. To calculate the SAP, the assessor uses information relating to lighting, heating, hot water systems, renewable technolgies used and the elements of structure.

Why Do I Need A SAP Calculation?

Under Part L of Building Regulations in Cardiff, since 2006, any new dwellings or conversions need to have a SAP Calculation and Predicted EPC before any work can begin.

When changes are made to the heating, hot water provision or air conditioning/ventilation services, it is the responsibility of the builder to provide any On Construction EPCs upon completiong of a new home or conversion into fewer or more units.

If you are selling a home before it has been built, you will need to provide information about energy efficiency in a Predicted Energy Assessment (PEA).

Our other services include:
Code 4 Sustainable Homes, SAP Conversion Calculations, Part G - Water Calculations, Acoustic Testing, Air Leakage Testing, Part F Ventilation Testing, SAP Extension Calculations, Environmental Noise, Sustainability Statements, On Construction EPC, Part E, Energy Statements, Thermography,

SAP Calculations can also be known as:
SAP Calc, TER DER Calculation, SAP Rating, TER DER Calc, Standard Assessment Procedure, Domestic Carbon Emission Calc, Domestic Carbon Emission Calculation, SAP Assessment,

E2 Specialist Consultants
July 22 at 5:05pm
One of our office-based consultants is hard at work on the SBEM calculation for a commercial new build in Bristol, Avon. You can get yourself an SBEM quote from our website:

E2 Consultants Delivering compliance solutions for Architects & Developers    Head Office E2 HOUSE, South Park Way, Wakefield 41 Business Park, WF2 0XJ    Questions? Call: 0800 043 8100