The CIBSE TM31 Building Logbook is a structured operational document that captures key building information to support ongoing energy management, compliance, and performance monitoring. It acts as a live document, bridging the gap between design intent, handover information and in-use building performance.
In the UK, the CIBSE TM31 Logbook is widely adopted as the recognised industry format for demonstrating compliance with Approved Document L (Part L) for non-domestic buildings, providing a concise, standardised method of presenting energy related building information and facilities management.
At Practical Completion, Dewick & Associates’ Chartered Engineers provide specialist technical authoring services to produce compliant TM31 Logbooks. Following handover, responsibility transfers to the Building Owner or Facilities Manager (FM), who is responsible for maintaining the logbook as a live document. This includes periodic updates and, as industry best practice, regular updates and at least an annual review to reflect changes in occupancy, system modifications, and actual energy consumption.
The CIBSE TM31 Building Logbook is a standardised operational document based on a defined template, designed to ensure consistency, usability, and clear presentation of key building performance information. It is intentionally concise, focusing on effective energy management and building operation.
Key content includes:
The CIBSE TM31 Building Logbook is not a statutory document in its own right, it is widely recognised as best practice within UK and international building performance frameworks as part of compliance, certification, and handover deliverables.
The TM31 Logbook supports alignment with the intent and evidence requirements of the following regulatory and sustainability frameworks:
In practice, TM31 Logbooks are increasingly expected across regulated and certified projects as part of demonstrating robust handover, operational readiness, and verified building performance management, particularly where sustainability certification or energy performance targets form part of the project brief.
It is important to note that the CIBSE TM31 Building Logbook does not replace statutory project documentation, but instead acts as a high-level operational summary and reference tool designed to improve accessibility and usability of key building information.
It is distinct from detailed Operation & Maintenance Manuals (O&M Manuals), which provide comprehensive technical specifications, manufacturer data, and maintenance procedures in line with the requirements of the Construction (Design and Management) Regulations 2015.
Similarly, the TM31 Logbook is separate from the statutory Health and Safety File required under Construction (Design and Management) Regulations 2015 (CDM 2015), which records residual risks, design hazards and safety-critical information required for ongoing building safety management.
The TM31 Logbook complements, but does not duplicate or replace these documents by extracting and consolidating essential energy and operational information into a clear, user-friendly format for Facilities Management teams.
Services: Mech, Elec, Fire , Hyd, MEP
Format: Digital, online, D&A standard, QR code, client specific
Drafting: As Installed / As Built Drawings
CDM 2015 Compliant
Collation of certificates and content, technical authoring of document by Chartered Engineers
Format: Structured digital file
Content: Architectural and Structural
nucleus, Digital Handover Platform
Collation of certificates and content
Format: Digital, D&A Standard, PDF
Speficic to high risk multi-occupied residential buildings
Forms part of “The Golden Thread”
CDM 2015 Compliant
Content: Details the building facilities and amenities
Format: Digital, online, D&A standard
Technical authoring by Chartered Engineers
