Hook Mason is a multi-award winning practice that undertakes a diverse range of projects within a multitude of client sectors including; residential, commercial, ecclesiastical, retail, healthcare, leisure, education, industrial and defence.

Hook Mason work in close collaboration with their clients, consultants, engineers and other specialist consultants to bring each project to fruition. Individual projects are led by an experienced Director or Associate, who have all worked for major clients throughout their careers, with the support of a design team this allows them to take each new project from inception to completion with the assurance of quality throughout.

SAP and Energy Performance Certification

SAP calculations are required at the design stage of a project to show compliance with Building Regulations, and at practical completion, to allow an Energy Performance Certificate to be issued for completed dwellings.

SAP calculations may also be required in order to support Building Regulations applications for existing dwellings – for example, when an extension is being added, or when a building undergoes a material change of use or material alteration. This may be particularly relevant where the extension is substantially glazed.


Hook Mason have an accredited On Construction Domestic Energy Assessor (OCDEA) who can undertake the production of SAP & EPC information for both new and existing dwellings.


For further information please contact