Energy Performance Certificates for Commercial & Domestic Buildings

Assess Ltd

Tel        0121 453 8332

Mob     07771 662 357

Email   [email protected]


Welcome to SAP EPC Assess, we provide SAP Assessments for New Build Homes, Extensions and Conversions (change of use).


We produce U-value calculations, SAP calculations and SAP reports, Part L Compliance Check and SAP EPC (Energy Performance Certificates).


In addition to providing all the documentation required for Building Control we will offer advice and recommendations to ensure that upon completion your project complies with Building Regulations Part L and that your lodged EPC & SAP Reports are ready at completion.

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INVOLVE US EARLY and we will work with you throughout your project and provide on-going advice on the options that you may want to consider in order to  ensure that Part L compliance is acheived as

cost-effectively as possible.

EARLY INVOLVEMENT in your project is critical in acheiving compliance as effectively and painlessly as possible and as Part L building regulations continue to get toughter this becomes even more important.


We can advice you at an early stage of any potential compliance issues and provide specific recommendations that might be introduced to avoid more costly alterations nearer completion. It is never too early to get us involved so please contact us as early as you can.

Architects, Architect, Builder, Contractor, Developer, Self Build, EPC, Building Regulations


SAP Calculations (SAP Calcs) are required for ALL NEW DWELLINGS (including 'change of use') and must be produced by an On Construction Domestic Energy Assessor (OCDEA or SAP Assessor) using the (FULL) SAP methodology and software (F-SAP).


Unlike EPC's for existing dwellings, a SAP EPC can be produced 'remotely' (without the need to visit site) from information supplied by the client at both the design stage and completion stage of the project. Initially a Predicted Energy Performance Certificate is produced based upon the intended design criteria then upon completion the final SAP EPC is produced as part of the compliance process to ensure that the design criteria have been met.


As the production of a SAP EPC for a NEW BUILD DWELLING is a multi-part process which is primarily concerned with ensuring your project complies with Building Regulations Part L and involves the  calculation of thermal efficiencies of your fabric elements (u-values), overall fabric efficiency (TFEE/DFEE) and your overall CO2 efficiency (TER/DER) and requires specialist knowledge of :-

CLICK BELOW for information on :-

SAP assessment and SAP calculations inlcuding building regulations compliance reports NEW BUILD DOMESTIC EXTENSIONS DOMESTIC CONVERSION / CHANGE OF USE


WHAT WE NEED FOR A SAP ASSESSMENT ... is a FULL SET OF PLANS including floors, elevations, sections and site layout ... HEATING/COOLING SPECIFICATIONS detailing space and water heating systems, ventillation and any low-carbon technologies (LZC) ... CONSTRUCTION SPECIFICATIONS including any Accredited Construction Details (ACD) used.


You can send these to us electronically or in printed format and once receieved we will be in touch to discuss your project in specific detail. (complete our SAP Questionniare)


We will 'model' your project within our software and produce some preliminary reports that we will ask you to check to ensure that we have interpreted your data correctly then depending upon the stage you are at with your project (design stage / built stage) we will produce your SAP Calculations, U-value and SAP Reports and your Part L Compliance Checklist and if compliant we can produce your SAP EPC (Pre SAP EPC at design stage, Lodged SAP EPC at built stage).


Should there be any issues with Part L compliance we will provide specific recommendations that you can consider in order to rectify this along with further copies of the compliance checklist to prove that implementing these changes will acheive compliance.


Your final SAP EPC can only be lodged at completion and if it is compliant with Building Regulations Part L.

SAP Assessment by experienced SAP Assessors, SAP EPC, RdSAP EPC, SBEM EPC available.

In addition to calculating the U-Values for the Fabric of the dwelling we need to consider the efficiency of the HVAC services (Heating, Ventilation & Air Conditioning) and can offer you practical advice in ensuring that these contribute to the overall ratings rather than purely meeting minimum requirements.

SAP ASSESSMENT are required for projects involving domestic dwellings including :-


NEW BUILD dwellings ... houses, flats, maisonettes, apartments, that are self contained (ie - they have their own bathroom and kitchen) are required to comply with building regulations part L1A


EXTENSIONS to an existing dwelling ... may require a SAP Assessment if they have glazing which totals more than 25% of the new floor area and are required to comply with building regulations part L1B


CONVERSION to a dwelling ... from a commercial or larger dwelling, dividing or seperating into an enclosed, self contained living space are required to comply with building regulations part L1B


( Complete our SAP Questionniare )

It's not only NEW BUILD DWELLINGS that require SAP Assessment you will also require a SAP EPC for highly glazed EXTENSIONS, Barn CONVERSIONS, COMMERCIAL to DOMESTIC conversions and

SINGLE to MULTIPLE dwellings (flats & appartments).


Existing Domestic EPC's and Commercial EPC's are produced using software that relies on many 'assumed' values (RdSAP & SBEM) however there are instances when calculated U-Values can give a far more accurate and representitive calculation for the property.


ONLY SAP ASSESSORS  /  On Construction DEA's

are qualified to produce U-Value calculations.


EPC Assess are quaified and accredited :-



... so can provide Energy Performance Certificates for (virtually) ANY PROPERTY TYPE and have years of experience working with architects, designers, builders, contractors large and small on thousands of standard and not-so-standard developments across the UK. We are happy to share our knowledge and do what we can to ensure your projects easily acheives compliance however EARLY INVOLVEMENT is CRITICAL if we are to guide you in the most cost effective way.

Opening like windows & doors generally lose more energy than the surrounding building fabric however glazing can provide useful Solar Gains that can be used to compensate for the losses providing they do not cause summer overheating, we can ensure that an optimum balance is achieved to ensure compliance.

It's never too early to get us involved and we are happy to be as involved as you would like us to be and hope our experience a cross a range of building types will allow us to be of service no matter what your next project entails.




  ... so we can help you with what you have planned for tomorrow !


... or CONTACT US on the form below :-

sap epc for new homes, sap epc for new houses, new build, part l1a, new flats, new bungalow, building regulations L1A SAP for NEW BUILD SAP assessment for Extensions, building regulations part l1b, part l1b regulations, orangry, house extension, SAP for EXTENSIONS Conversion Stafford SAP for CONVERSIONS