SAP Calculations for New Build Dwellings
Our highly experienced SAP Assessors provide a friendly and fully supportive service to a host of clients throughout the UK, including Architects, Developers and Builders of all sizes.
As part of our SAP Calculation service we provide all necessary advice or recommendations that may be required to ensure that your project passes Approved Document L: Volume 1 of the Building Regulations (or local equivalent) in a practical and cost-effective manner.
SAP Assessments for New Build Developments
All newly constructed residential properties in the UK require an individual new build SAP Calculation to be submitted to the appointed Building Control Body (BCB) before any building work commencing.
Approved Document L: Volume 1 of the Building Regulations in England and Wales (and other related build standards elsewhere within the UK) requires all new dwellings to achieve stringent annual carbon emissions targets and minimum thermal performance standards. This is demonstrated by undertaking a SAP Assessment which includes a DER/TER Calculation along with a DFEE/TFEE and DPER & TPER check (applicable to England and Wales only).
On completion of a development, an ‘As Built’ SAP Calculation is provided for each completed dwelling, which is also used to generate an On Construction Energy Performance Certificate.
To discuss your SAP Assessments further, please contact us on 0115 7270599. Alternatively please complete the form below to request a FREE quotation.
New Build SAP Calculations: Expert Consultancy
SAP Calculations for new build residential developments should be completed alongside the detailed design process, once internal layouts have been confirmed, and a provisional or outline build specification is available.
This provides an opportunity to easily adopt any recommended specification changes that may be required to achieve compliance with Approved Document L: Volume 1 of the Building regulations (or other local equivalent standards).
Once the building works are complete, the design stage SAP calculation is updated to reflect the completed dwelling including any specification or design changes, the final heating, hot water and ventilation systems and the actual measured air permeability rate of the residence as determined by an Air Tightness Test.
The final ‘As Built’ SAP calculation is issued for submission to the appointed Building Control Body. It is also used to produce an On Construction Energy Performance Certificate (EPC) for the completed dwelling which is also required by Building Control as part of the sign off procedure, while also being a legal requirement for the subsequent sale let of the dwelling.
For more information relating to SAP Calculations for New Build properties, please explore the Frequently Asked Questions below or those detailed on our general SAP Calculation page.
New Build SAP Calculation – Frequently Asked Questions:
What are the Dwelling Emission Rate (DER) and Target Emission Rate (TER)?
The Target Emission Rate (TER) is a maximum level of annual CO2 emissions that are permitted from a dwelling by Approved Document L: Volume 1 of the Building Regulations (or equivalent local standard). The TER is calculated within a new build SAP calculation, based upon a notional property of the same size and shape as the proposed dwelling that is built to set of minimum energy performance standards as outlined with the Building Regulations.
The Dwelling Emission Rate (DER) is the actual annual CO2 emission rate of a dwelling as determined by a SAP Calculation based upon the overall proposed build specification of the development.
To comply with Approved Document L: Volume 1 of the Building Regulations, the calculated DER must not exceed that of the mandatory TER.
What are the Dwelling Fabric Energy Efficiency (FEE) and Target Fabric Energy Efficiency (TFEE) rates?
Part L1A 2013 introduced Dwelling Fabric Energy Efficiency (DFEE) and Target Fabric Energy Efficiency (TFEE) rates to the Building Regulations in England and Wales, as a means of promoting a ‘Fabric First’ approach to achieving overall compliance with the DER/TER requirements of building regulations.
In a similar manner to the TER, the TFEE is calculated within a new build SAP calculation, based on a notional dwelling of the same size and shape as the proposed property that is built to set of minimum energy performance standards as outlined with the Building Regulations.
The DFEE rate is derived from an actual SAP Calculation based upon the overall proposed build specification of the development.
To comply with Approved Document L: Volume 1 of the Building Regulations, the calculated DFEE must not exceed that of the mandatory TFEE.
What are the Dwelling Primary Energy Rating (DPER) and Target Primary Energy Rating (TPER)?
Approved Document L: Volume 1 2021 introduced Dwelling Primary Energy Rating (DPER) and Target Primary Energy Ratings (TPER) to the Building Regulations in England and Wales, as a means of determining how much energy has been used to create the fuel that is to be used within a dwelling.
The Primary Energy Factor differs depending on the fuel type and indicates how many kWh of energy were used to produce 1 kWh of energy used in the dwelling.
To comply with Approved Document L: Volume 1 of the Building Regulations, the calculated DPER must not exceed that of the mandatory TPER.
What are the notional build standards used to calculated the Target Emission Rate (TER) , Target Fabric Energy Efficiency (TFEE) and Target Primary Energy Rate (TPER)?
The TER, TFEE and TPER rates are calculated based on a notional dwelling of the same size and shape as the actual proposed dwelling if it is constructed to a concurrent specification.
|External Walls||0.18 W/m2K|
|Party Walls||0.00 W/m2K|
|Air Permeability||5 m3/m2/hr @ 50 Pa|
|Thermal Bridging||Y = 0.05 W/m2K / Psi values from Appendix R of SAP 10|
|Space & Water Heating||Mains gas boiler (system / combi as per actual), 89.50% efficient (SEDBUK), radiators with a flow temp of 55oC|
Single storey, where living area > 70% of floor area – Programmer, Room Thermostat and TRV’s
All other – Time and Temperature Zone Control
All – Interlock, ErP Class V Compensator
|WWHRS||Instantaneous WWHRS, connected to all showers|
|Lighting||Capacity – 185 x Floor Area, Efficacy – 80 lm/W|
|Ventilation||Natural with intermittent fans (System 1)|
Houses – kWp = 40% of floor area of lowest storey (including unheated spaces such as garages) / 6.5
Flats – kWp = 40% of building footprint (including unheated spaces such as garages & corridors) / (6.5 x no. of storeys in block)
System facing south-east or south-west
It is, however, noted that these details are not prescriptive and may not be the most economically feasible option for all development. Designers and developers are therefore free to pursue other specifications provided the final DER, DFEE & DPER equal or better the TER, TFEE and TPER .
What happens if the SAP Calculation fails?
Specification improvements are usually required If a SAP calculation initially fails the minimum energy performance standards of the Building Regulations. At EPS Group, we specialise in working with our clients to devise low cost, practical options to achieving overall compliance with Approved Document L: Volume 1 (or equivalent local standard). Rest assured, we will work with you to provide options that will guarantee your SAP calculation passes.
How can EPS Group help with SAP Calculations?
There are many reasons to appoint EPS Group to provide your SAP Calculations
How can EPS Group help with SAP Calculations?
At EPS Group, we are interested in forming ongoing partnerships with property professionals and self-builders by offering unrivalled customer support and technical consultation, which can be relied upon.
As part of this commitment, our SAP Calculation service includes all required advice and recommendations to ensure that your project passes with the appropriate Building Regulations in a practical and cost-effective manner.
Don’t let compliance obligations hold you back! Our Energy Consultants and certified Assessors have the experience to understand your challenges, and the expertise to meet them on your behalf.
We complete thousands of new build SAP Calculations each year. You can rest assured that we know how to demonstrate compliance with Approved Document L: Volume 1 of the building regulations in a cost-effective and practical manner.
Expedited Service Available
We appreciate that developments move fast. If you require energy calculations or pressure testing urgently, give us a call and we will try our best to help.
We provide transparent, competitive, all-inclusive fixed fees with significant discounts available for developments with multiple units.
Fully Accredited Team
Our SAP Assessors are all fully accredited and insured. You can therefore rely on the advice and services that they provide.
We only provide energy calculations and testing services. With no materials or products to sell you can be confident that we will aim to provide you with the most economic and feasible solutions to achieving compliance.
One Stop Solution
From planning to completion we provide an extensive range of complementary services which helps to simplfiy our client’s energy compliance obligations.
We tailor our services around you and your bespoke requirements. This is not an industry where a one-size fits all approach should be used.
Ongoing Technical Support
Plans and specification change. We are therefore available to provide technical support throughout the duration of a build in order to prevent any regulatory problems arising at completion.
Recent SAP Projects
EPS Group: A Partner for those in the Construction Industry
We value the importance of a solid working relationship with those in the construction industry, and for many, we serve as the reliable go-to-company to entrust from the planning stage of a development through to completion.
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