Wolf Passive Homes

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New Build SAP

Main page   Services   New Build SAP

Standard Assessment Procedure (SAP) calculations are a mandatory requirement for any new build dwelling. SAP is used to show compliance with Part L of the Building Regulations and is applied at the design stage of the build process and is submitted to Building Control.

SAP calculates the energy cost and carbon emissions generated to heat, light, ventilate and provide hot water to a building. A SAP calculation at the design stage, produces a Projected Energy Assessment (PEA) which details how much energy a new home will use. This is translated into a more user-friendly Energy Performance Certificate (EPC) once the building has been constructed. The EPC is a certificate which summarizes the SAP assessment and is used when marketing the property for sale.

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SAP Calculations

The SAP is the single method of compliance with Part L Building Regulations (2006) and takes the notional carbon footprint calculation of a house from the 2002 Part L regulations and specifies that a new build house must achieve a 25% reduction in carbon use, to comply with current regulations.

So, if a house emitted 100 tonnes of CO2 in 2002, a house built after the introduction of Part L 2006 must emit 75 tonnes (at the most) to receive a SAP certificate. This is known as the Target Emission Rate (TER).

Upon completion of construction of the building, a SAP assessor will review the property to ensure that products and techniques specified at design stage have been incorporated into the build. They will then calculate the carbon footprint of the building to ensure the TER has been met. The reading recorded in the building upon completion is known as the Dwelling Emission Rate (DER), and should this be lower than or equal to the TER, the building will receive a SAP certificate.

For commercial properties, a Simplified Building Energy Model (SBEM) is used, which provides exactly the same information as a SAP.

Service

We use fully qualified SAP Assessors and provide the calculations for:
- New Build Dwellings
- Conversions
- Extensions (where the amount of glazing is deemed high)

Building Control will not issue a completion certificate until a valid new build EPC has been produced by a certified Energy Assessor.

Our service has a rapid turn-around time, we are proactive in incorporating innovate materials and renewable energy sources into the calculations where and when required.

We can also assist in standardising building specifications for larger developers i.e. a renewable energy strategy.

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