Find the requirement.
Trace it to
the source.

ClearRegs Search retrieves relevant passages from the indexed Approved Documents and legislation and answers from that material. Each answer names the document and page it drew on, so you can check it against the source.

When an answer matters to a project, add it straight to a compliance item in ClearRegs Projects with its citation attached, or open the source document and select a region of the page to capture a figure, table or clause against the requirement it supports.

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How quality is managed

Built to be checked

We test ClearRegs Search regularly against a set of Building Regulations questions and use the results to improve it. Each answer names the document and page it drew on, so you can check it in context, and it is designed to say so when it cannot find supporting material.

The retrieval pipeline

From question to source grounded answer

Each question passes through a multi stage retrieval process. ClearRegs identifies likely sources, retrieves and reranks relevant passages, then uses that material to produce an answer with traceable citations.

  1. Input Your question Asked in plain English
  2. Stage 1 Source scope detection Likely documents, volumes and sources identified
  3. Stage 2 Hybrid retrieval Relevant passages found by semantic and keyword search
  4. Stage 3 Relevance reranking Candidate passages reordered by relevance
  5. Stage 4 Answer and citation Generated from the retrieved passages and linked to its sources
  6. Output Source grounded answer Source · provision or page
Under the hood

Grounded in indexed sources

ClearRegs Search begins by retrieving relevant material from its indexed regulatory and guidance sources. It uses those passages to produce a source grounded answer with citations that allow the supporting material to be checked in context.

  1. 01

    Your question is interpreted in context

    ClearRegs identifies the regulatory intent of the question and the sources, documents, volumes and topics likely to be relevant.

    This can distinguish between documents intended for different building types, for example the two volumes of Approved Document B, and can retrieve material from more than one source where the question spans several requirements.

  2. 02

    Relevant passages are retrieved

    The system searches the indexed corpus using the meaning and terminology of the question.

    It retrieves candidate passages from the source documents and ranks them by relevance, retaining their source references so the original material can be traced.

  3. 03

    The answer is grounded and cited

    ClearRegs uses the retrieved passages to generate an answer and attaches citations identifying the supporting source.

    Depending on the document, a citation may include the regulation, section, paragraph, clause, table, diagram or page reference. This allows the user to open the source and verify the answer in its wider context.

    Where the indexed material does not support a reliable answer, ClearRegs should make that limitation clear.

  4. 04

    Follow-up questions retain the conversation context

    Within the same session, ClearRegs retains the context of the conversation. You can ask about a cited provision, request clarification or explore a related requirement without restating the original question.

    Each follow-up is treated as a new retrieval request informed by the preceding exchange.

What makes ClearRegs Search different

Answers you can trace back to the source

An ungrounded chatbot response may draw on patterns learned during training rather than the documents governing the question. The result can sound authoritative while misstating a requirement, combining guidance from different contexts or referring to material that is no longer current.

ClearRegs Search starts with its indexed regulatory and guidance sources. It retrieves relevant passages, uses that material to produce an answer and identifies the supporting document and provision or page so that the answer can be checked in its original context.

Where the indexed sources do not provide enough support for a reliable answer, ClearRegs is designed to make that limitation clear rather than fill the gap with an unsupported conclusion.

An ungrounded chatbot response
  • May rely on general model knowledge
  • May not identify the source of a claim
  • Can combine material from different versions or contexts
  • May present an unsupported answer with confidence
  • Can be difficult to verify against the governing document
ClearRegs Search
  • Searches a defined corpus of indexed sources
  • Grounds answers in retrieved passages
  • Identifies the supporting document and provision or page
  • Keeps the answer connected to its source context
  • Identifies when the indexed material does not support a reliable answer
Document coverage

What ClearRegs Search indexes

This is the complete list of sources ClearRegs Search answers from, for England: the Approved Documents for Parts A to T, the Building Regulations 2010, the Building Safety Act 2022 and the other legislation below. Anything not listed here is not indexed.

Which edition applies to a project can depend on transitional provisions, so confirm the applicable version for your own work.

A B C D E F G H J K L M O P Q R S T
Approved Documents
Parts A to T, for England

All 22 current volumes, including the split volumes for Parts B, F, L and M. The edition of each is listed in the register below.

Approved Documents A to T, 22 volumes
Their tables and diagrams
Primary legislation
Building Safety Act 2022

The text of the Act and its schedules, as published on legislation.gov.uk and up to date with changes in force on or before 11 March 2026.

Building Safety Act 2022, full text
Secondary legislation
Building Regulations 2010 and related regulations

The regulations the Approved Documents give guidance on, indexed as the consolidated text up to date with changes in force on or before 16 March 2026, so answers can cite the regulation alongside the Approved Document that explains it.

Building Regulations 2010, including the Part 2A dutyholder duties and Schedule 1
Construction (Design and Management) Regulations 2015
Building (Approved Inspectors etc.) Regulations 2010, for historical reference only
Not yet indexed
Planned or out of scope

These are not currently searchable, and answers will not draw on them.

Regulations made under the Building Safety Act, including the higher-risk building procedures
Building Safety Regulator guidance, including Gateways 2 and 3
Approved Document 7, materials and workmanship
Approved Documents for Wales, and Scottish building standards
Third-party standards, such as British Standards, PAS and CIBSE guidance

Document register

DocumentTitleIndexed edition
Approved Document AStructure2004 edition incorporating 2004, 2010 and 2013 amendments
Approved Document B Volume 1Fire safety: dwellings2019 edition incorporating 2020, 2022 and 2025 amendments, collated with the 2026 and 2029 changes
Approved Document B Volume 2Fire safety: buildings other than dwellings2019 edition incorporating 2020, 2022 and 2025 amendments, collated with the 2026 and 2029 changes
Approved Document CSite preparation and resistance to contaminants and moisture2004 edition incorporating 2010 and 2013 amendments
Approved Document DToxic substances1992 edition incorporating 2002, 2010 and 2013 amendments
Approved Document EResistance to the passage of sound2003 edition incorporating 2004, 2010, 2013 and 2015 amendments
Approved Document F Volume 1Ventilation: dwellings2021 edition
Approved Document F Volume 2Ventilation: buildings other than dwellings2021 edition
Approved Document GSanitation, hot water safety and water efficiency2015 edition incorporating 2016 and 2024 amendments
Approved Document HDrainage and waste disposal2015 edition
Approved Document JCombustion appliances and fuel storage systems2010 edition incorporating 2010, 2013 and 2022 amendments
Approved Document KProtection from falling, collision and impact2013 edition
Approved Document L Volume 1Conservation of fuel and power: dwellings2021 edition incorporating 2023 amendments
Approved Document L Volume 2Conservation of fuel and power: buildings other than dwellings2021 edition incorporating 2023 amendments
Approved Document M Volume 1Access to and use of buildings: dwellings2015 edition incorporating 2016 amendments
Approved Document M Volume 2Access to and use of buildings: buildings other than dwellings2015 edition incorporating 2020 and 2024 amendments
Approved Document OOverheating2021 edition
Approved Document PElectrical safety: dwellings2013 edition
Approved Document QSecurity: dwellings2015 edition
Approved Document RInfrastructure for electronic communications2022 edition
Approved Document SInfrastructure for charging electric vehicles2021 edition
Approved Document TToilet accommodation2024 edition
Building Regulations 2010SI 2010/2214, consolidatedUp to date to 16 March 2026
Building Safety Act 20222022 c. 30Up to date to 11 March 2026
CDM Regulations 2015SI 2015/51Text as published on legislation.gov.uk
Building (Approved Inspectors etc.) Regulations 2010Historical referenceReplaced in England by the registered building control approver regime in 2024