Existing HRB Works
& Category B Support

Support for works to existing higher-risk buildings

Planning works to an existing higher-risk building can be difficult to navigate.

The rules are very detailed. The approval route depends on the type of work, the building, whether the work falls within the higher-risk building regime, and the BSR’s requirements as the Building Control Authority. Where plan checks or site inspections are required, the BSR may involve appropriately registered inspectors, including Class 2C or 2F RBIs where the work falls within their permitted scope.

enevo helps building owners, accountable persons, managing agents, contractors, architects and dutyholders understand the right route before work progresses.

We can support works to existing HRBs by helping establish the likely work category, preparing Building Safety and compliance information, and supporting the BSR application process where required.

Send us your project details and we’ll send a quote

Who this is for

This service is designed for teams planning or managing works to existing higher-risk buildings, including:

building owners and accountable persons
managing agents and asset managers
developers and contractors
architects and design teams
dutyholders under the Building Safety Act
resident management companies
project managers and consultants

It may be relevant where proposed works affect an existing high-rise residential building, care home or hospital that falls within the higher-risk building regime.

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How enevo can help

01

Scope review and route advice

We review the proposed works and help you understand whether they are likely to fall within Category A, Category B, exempt work, competent person scheme work or another route requiring BSR approval.

02

Building Safety and regulatory duties

We identify the likely Building Safety Act and Building Regulations duties that apply, so responsibilities are clearer from the outset.

03

Evidence and documentation support

We advise on and help prepare the information needed to support the works, including the Building Regulations compliance statement, Schedule 1 documentation where required, design evidence, compliance records and Golden Thread information.

04

Dutyholder and design coordination

We help clients, designers, contractors and other dutyholders understand their roles, responsibilities and information requirements.

05

Design, compliance and risk review

We review design and compliance information to identify risks early and reduce the chance of missing evidence, unclear decisions or late-stage issues.

06

Regulatory and BSR coordination

We help prepare the right information for engagement with the Building Safety Regulator and support responses to regulatory queries. Where plan check or inspection input is required, this remains within the BSR’s Building Control Authority process, with appropriate RBI assistance brought in by or on behalf of the regulatory authority.

The Code of Conduct

What types of work this may relate to

For in-scope higher-risk building work, the Building Safety Regulator remains the Building Control Authority. The GOV.UK Code of Conduct confirms that Class 2C and 2F Registered Building Inspectors may carry out defined permissible work on existing HRBs when acting on behalf of the regulatory authority, where it is the building control authority.

This may include certain internal layout changes within a residential unit, provided no other Category A work is involved, and Category B work as defined under the higher-risk building procedures.

From a Building Safety perspective, enevo can assist with preparing the Building Regulations compliance statement, supporting Schedule 1 documentation where required, fire compliance information for relevant Category B work, design evidence, Golden Thread information and wider application support. The BSR remains responsible for the building control approval process.

Frequently Asked Questions

Can Class 2C and 2F inspectors work on existing HRBs?

GOV.UK states that Class 2C and 2F RBIs can carry out permissible work on existing HRBs on behalf of the regulatory authority when it is the building control authority. The scope is limited and should be reviewed against the proposed works.

What is Category B work on an HRB?

Category B work is defined in Regulation 12(6) of the Building (Higher-Risk Buildings Procedures) (England) Regulations 2023. The practical impact depends on the specific proposed works, so the scope should be checked before proceeding.

Does this mean all HRB work can be handled by a Class 2C or 2F inspector?

No. The GOV.UK wording is limited to permissible work on existing HRBs. Wider HRB works may require different competence, approval routes or BSR involvement.

Can enevo help with works to existing high-rise residential buildings?

Yes. enevo can help review the proposed works, advise on likely regulatory routes, support dutyholder coordination, prepare documentation and coordinate Building Safety and Building Control input where appropriate.

Why enevo Building Safety?

enevo’s team brings deep, hands-on experience in delivering HRB projects under regulatory pressure. Our credentials include:

Multi-disciplinary specialists in fire safety, design compliance, and building control
Direct experience preparing Gateway 2 and 3 submissions for residential, mixed-use, and refurbishment HRBs
Familiarity with CDE workflows, change control requirements, and Regulation 38 expectations
Proven track record advising Principal Designers and Clients through complex, high-risk schemes
Chartered professionals with CABE, CIOB, and RICS status
Over 70 years’ combined experience across building control, health and safety, and regulatory compliance
Proven background in both public and private sector regulatory work
Direct project involvement in high-rise residential, mixed-use, commercial fit-outs, schools, hospitals, and defence sites
Experience delivering Gateway 2 submission documentation and Regulation 38 handovers
Deep understanding of Common Data Environments (CDEs), change control, and golden thread principles
Frequent collaboration with developers, architects, contractors, and local authorities

Whether you're preparing an application or recovering a stalled submission, we bring clarity, assurance, and capability to HRB compliance.

How can we help you
with your project?

Trusted, Time And Time Again

Harry gave me excellent advice and clear understanding on what BREEAM means as well about the specific accredited assessing required by professionals like Harry.

Angela Singh

Very efficient and professional service. Cant recommend enevo enough, glad I chose them for my project.

William Brannon

Very impressive on all aspects of energy calcs. Responsive and cost competitive. Highly recommended

Nick Spencer

enevo are always helpful, friendly and efficient in carrying out SAP calculations for our clients.

Lizzie Hicks

enevo were fantastic from start to finish and helped make each step of the project run smoothly. I would highly recommend and we will definitely be using again, if needed in the future.

Rees Doyle

We have always found enevo to provide an excellent service in the preparation of SAP Calculations and Assessments as well as EPC Certificates for projects that they have worked on for us. They are also reasonably priced so we would certainly recommend them to anyone looking for this type of service.

Martin Booker

Used enevo from start to completion of our recent project of 2No. new builds. Services included SAP/EPC and property air testing. Great service, understanding of requirements and cost. Person friendly company and good with communication.

Mark Radcliffe

Very efficient, personal, professional service, with a quick report turnaround. Highly recommended if you're a self-builder trying to navigate the complexities of the latest regulations.

Edward Broadhead

Always efficient and prompt service, enevo are an asset to my company, having used their services on multiple developments I wouldn't hesitate to recommend them.

Mac Chappell

Great service with a fast turnaround. Communication was excellent throughout. Richard the engineer was polite and professional. Will certainly be using enevo again.

ECO PROPERTY DEVELOPMENTS LTD

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03301 901 200

info@enevo.co.uk

Existing HRB Works
& Category B Support