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Building compliance guides

Short, sourced answers to the questions people ask about testing, calculations and reports.

Guides for understanding your next service

The guides answer questions people ask before they commission compliance work: what a test involves, what a report should contain, how two assessment methods differ and what drives the cost. Each one names the regulation or official guidance behind its answer and links to it, then points to the service page where you can ask for the work itself.

Use these guides when you recognise a problem but do not yet know the service name. You might have a request for a report, a proposed change to a building or a test approaching on site. Each guide takes a specific question and explains the information worth gathering before you commission work. Start with the question closest to yours rather than reading the whole collection.

The service directory describes work you can ask us to arrange. The guides provide background for that conversation: how related documents differ, what affects the scope and which project details help an assessor. Reading a guide does not book a visit or establish that its subject applies to your building. Send the actual request or drawings when you want a project-specific scope.

Choose a checklist if several subjects overlap. Choose a comparison if two report names seem interchangeable. Choose a preparation guide if an assessment is already being discussed and you want to understand the practical questions. A cost guide explains the information behind a quotation; it cannot establish a price for an unseen project.

Guides grouped around your project questions

Air leakage, sound and ventilation testing

Energy calculations, certificates and fabric

  • Is a SAP Calculation the Same as an EPC?

    Compare the purposes of a design calculation and an energy certificate before deciding which document your recipient is asking you to provide.

  • SAP vs SBEM: Which Does Your Building Need?

    Identify the building use and project information needed to discuss the appropriate energy calculation route, particularly where different uses share a development.

  • What Is a BRUKL Report?

    Understand where a BRUKL report sits within a non-domestic energy assessment and which supporting design details are useful when discussing its preparation.

  • When Are SBEM Calculations Required?

    Work through the questions about non-domestic building use, proposed work and assessment purpose that help establish an appropriate scope for energy calculations.

  • SAP Calculations for Extensions

    Prepare a clearer enquiry about an extension by collecting existing and proposed drawings, glazing information and the construction details available to your designer.

  • Display Energy Certificate vs EPC

    Distinguish the questions behind a display certificate enquiry and an EPC enquiry before gathering building records or asking for a quotation.

  • How Much Does an EPC Cost?

    Learn which property characteristics, records and access arrangements affect the scope of an EPC enquiry without relying on an assumed standard price.

  • What U-Values Do Building Regulations Require?

    Follow the relationship between a proposed construction build-up and its thermal calculation so that product substitutions can be discussed with the right evidence.

Overheating, planning and water

Existing buildings, safety and retrofit

Project-wide checklists

  • Converting a Building into Flats: Compliance Checklist

    Map the questions raised by a conversion into flats across drawings, existing construction, intended use and the reports requested for the proposed work.

  • New Build Compliance Checklist

    Use a project-stage checklist to connect early design information with later testing enquiries and avoid treating completion evidence as an isolated purchase.

  • Landlord Compliance Checklist

    Bring separate property records into one enquiry while keeping the purpose, building coverage and outstanding questions for each assessment clearly identified.

Using a guide before ordering a service

  • Save the wording of the request you are trying to answer, including attachments and any marked-up drawings. Planning requirements differ by council; check your own application material rather than borrowing a neighbouring project's brief. The official planning application guidance explains the application information context.
  • Write down what is already fixed and what can still change. A layout under review calls for a different conversation from a completed building awaiting a visit. Tell us which drawings are current, which products are selected and whether previous reports refer to an earlier design.
  • Take your unanswered questions to get a quote. Include the guide topic if it helped you identify the issue, but attach the project evidence as well. Ask for the proposed scope to distinguish calculations, site attendance and final reporting so you can compare it with the request you received.