Change description : 2025-09-18 10:04:00: Information added to building categories and registered building inspector classes that include permissible work. [Guidance and regulation]
Registered building inspectors carry out regulated building control activities, which are:
assessing plans
inspections
giving advice to building control bodies that carry out regulated functions
After April 2024, if you intend to carry out any of these activities in England or Wales, you must be registered as a building inspector. After this date, if you are not registered it is a criminal offence to work as a building inspector.
Building control bodies
Registered building inspectors (RBIs) work for building control bodies, either as employees or contractors. Building control bodies are:
the Building Safety Regulator (BSR)
local authorities
registered building control approvers
Before you apply to register as a building inspector
The competence framework sets out the skills, knowledge and qualifications required for your registration application.
To apply to register as a class 2, 3 or 4 building inspector, you will need to complete, or be enrolled on, an independent competency assessment. If you apply to register without being assessed, you will be registered as a class 1 building inspector and can only work under supervision.
Building types
To apply to register as a building inspector, you will need to decide which types of building you are competent to work on. There are:
standard and non-standard buildings
8 different building categories
Standard buildings
A standard build is designed and constructed from common industry recognised standards and codes.
Non-standard buildings
A non-standard build are buildings that include anything outside of common construction techniques in England or Wales. They do not follow industry recognised design principles set out in relevant building guidance codes, such as:
buildings with unusual occupancies or high levels of complexity, for example shopping centres occupied by shoppers and workers, conference centres and hospitals
very large or very tall buildings and large timber buildings
some buildings that incorporate modern construction methods
Before a building project starts, building control bodies should identify if a building is non-standard, due to being:
very large
very tall
large timber buildings
Building categories
The 8 building categories you can register to work on are:
category A, residential dwelling houses (single household) under 7.5m
category B, residential flats and dwelling houses under 11m
To apply to register as a building inspector, you’ll need to decide which registration class you are competent to apply for. There are 4 classes of RBI.
Class 1
Must only work under supervision. You do not have to complete a competency assessment to register as a class 1 building inspector. This class is suitable for anyone new to the profession who is undergoing training.
Class 2
Can work unsupervised on building categories they are registered to work on, which may include:
Can work unsupervised on building categories they are registered to work on, which may include category A to F buildings and:
category G
category H
Class 4 technical manager
Technical managers are class 2 or class 3 building inspectors with additional responsibilities for the technical management of teams and processes.
A class 2 building inspector, who is also a class 4 technical manager, cannot carry out any class 3 activities unless supervised.
Someone who is not a registered building inspector can administratively manage a building control team, but not on technical matters.
Competency assessment
To apply to register as a class 2 or 3 building inspector, you must complete a competency assessment from an approved scheme. There is no mandatory competency assessment required to register as a class 4 building inspector, although a voluntary class 4 competency assessment is offered by some schemes.
You can get a competency assessment by contacting one of the providers of the approved schemes:
As part of the assessment you will need to submit a portfolio of your work and pass an exam or an interview. You must be re-assessed at least every 4 years.
After you complete your assessment you will receive a certificate number. You will need to provide the number when you register as proof of your assessment.
After passing your competency assessment
Once you have successfully passed your competency assessment and received your certificate number, contact BSR to upgrade your registration. You will not be charged for this.
Registrations will usually be valid for 4 years, unless varied, suspended or cancelled by BSR.
If you registered before 6 April 2024, the 4 years begin from 6 April 2024.
Information you will need
To complete the registration, you will need to provide:
your name, date of birth and contact details
your National Insurance number to cross-check with your competency assessment
the building inspector class you want to register as
the categories of buildings you are competent to work on
details of your independent competency assessment, if you want to register as a class 2 or 3 building inspector
membership details of relevant professional bodies, if you have any
your employment status
Code of conduct
As part of your application to register, BSR will ask you to confirm that you comply with the code of conduct for registered building inspectors in the countries you are registered in.
BSR will tell you if your application is approved, approved subject to conditions, or rejected.
In cases where the application is subject to conditions or rejected, BSR will tell you why.
You can challenge the decision. The process is different depending on whether you applied to register in England, Wales, or both.
To request a review of an English registration decision, you should contact BSR within 21 days of receiving your decision. You will need to tell us:
your application reference
the date the decision was made
the reasons why you want us to review the decision
any further information that may be relevant but was not available at the time of the original decision
If at the end of a review the decision is upheld, you can appeal to a First-tier Tribunal.
To appeal a Welsh registration decision, you can lodge an appeal with the Magistrates’ Court within 21 days of receiving the decision. This time limit can be extended with the written agreement of BSR.
After you register
After registration, you must maintain and develop your competence as a building inspector. This means you must:
abide by the code of conduct
continue to develop your skills and knowledge, this can be evidenced by maintaining an up-to-date portfolio of work
complete an independent competency assessment at least every 4 years
If you want to expand the range of work you are registered to do, you can:
develop your competence within your class under the appropriate supervision, to work across more building categories
pass an independent competency assessment to change your registration class
Supervision
When you work under supervision, it means that your work is overseen by a suitably competent RBI. A suitably competent RBI is someone of a relevant registration class who can carry out the work.
Working under supervision: class 1 trainee building inspector
Work you could be supervised on, as a class 1 trainee building inspector, includes:
checking plans for compliance with building regulations where the plans are re-checked by a suitably competent class 2, 3 or 4 RBI
inspecting building work alongside a suitably competent class 2, 3 or 4 RBI, this will include discussing findings and having your decision-making overseen
gathering information to show a suitably competent class 2, 3 or 4 RBI for a decision on compliance
Working under supervision: class 2 registered building inspectors
Work you could be supervised on, as a class 2 building inspector, includes:
checking plans and specifications for compliance with a suitably competent RBI against building regulations for class 2 work, which you are not registered for
checking plans and specifications for class 3 work where the plans are re-checked by a suitably competent class 3 RBI
inspecting building work alongside a suitably competent class 2 or 3 RBI, this will include discussing findings and having your decision-making overseen
gathering information to show a suitably competent RBI of a class 2 for which you are not competent, or class 3 for a decision on compliance
Working under supervision should form part of your professional learning and development.
You should keep evidence of your work, including work done under supervision, in your portfolio.
Supervising registered building inspectors
If you supervise the work of another building inspector, you are responsible for the work and must make sure it is done correctly.
You can only supervise work you are competent to carry out.
You can find out more about your responsibilities in the relevant code of conduct.
Finding a supervisor
The building control body you work for must provide you with a supervisor. This is the same whether you are employed or self-employed.
The building control body must have a process in place to make sure all supervised work is up to standard.
Public register
There are 2 public registers of building inspectors, one for England and one for Wales.
To change your details, call BSR on 0300 790 6787.
Monday to Friday, 8:30am to 5pm (except Wednesdays when we are open from 10am to 5pm, and public holidays when we are closed). Normal call charges will apply.
BSR will ask for your email address and send you a form and a ShareFile link with instructions on how to upload your changes.
You do not need to re-register after making a change unless your registration is due to expire.
Conflicts of interest
You must not undertake work, or continue to undertake work, where a conflict of interest is identified.
A conflict of interest can include:
political, such as holding the position of councillor in the area you are allocated to complete a building project
financial, such as ownership in a company you are called to inspect
relationships, such as completing or contributing to building control work with a friend or relative
personal, such as not wanting a certain type of building near your home
You must take steps to identify potential and actual conflicts of interest, prior to you starting work, and during work activity. If you identify a conflict of interest, you must notify your employer immediately.
Professional misconduct and complaints
If you are found to be guilty of professional misconduct you could face sanctions. A breach of the code of conduct may be used as evidence of professional misconduct.
You are committing an offence and could be prosecuted if you:
carry out work that you are not registered to do without supervision
work as a building inspector after April 2024 without being registered
The following information has been added to the guidance: There is no mandatory competency assessment required to register as a class 4 building inspector, although a voluntary class 4 competency assessment is offered by some schemes.
3 July 2025
To register as a class 2 or 3 registered building inspector (RBI), individuals must complete a competency assessment from an approved scheme. There is no competency assessment to register as a class 4 RBI. Therefore, any mention of competency assessments for class 4s have been removed from the guidance.
18 June 2025
New information has been added about permissible work for class 2 building inspectors in England.
6 May 2025
Description of category H buildings updated to include 'all buildings' so it is now inline with the building inspector competence framework.
9 April 2025
Welsh translation added.
19 March 2025
Changed links in bullet points under 'Non-standard buildings'.
1 October 2024
The competency assessment extension period has ended, information about it has been removed from the page.
16 July 2024
Changes made to the definitions of building categories and addition of class 2 RBI exclusions
7 July 2024
Update made to competency assessment extension period information
29 May 2024
Guidance on conflicts of interest added.
9 May 2024
Guidance on building types, such as standard and non-standard buildings added.
9 May 2024
Guidance on building types, such as standard and non-standard buildings added.
14 March 2024
Competency assessment extension period guidance added. From 6 April to 6 July 2024 experienced building inspectors in England can complete their competency assessment and upgrade their registration.
Guidance on extension period eligibility has also been added.
31 January 2024
Guidance additions for registering as a building inspector for Wales. This includes links to the code of conduct, competency framework, charging scheme and reviews for Wales.
Annual maintenance charge has also been added to the guidance.