What Is a Registered Building Control Approver and What Do They Do?

A Registered Building Control Approver (RBCA) is an organisation authorised by the Building Safety Regulator (BSR) to check that building work complies with the Building Regulations through design review, site inspections and formal sign-off.

If you’re planning a development, understanding exactly what an RBCA does, and why the right partner matters, can save you time, money and a great deal of stress further down the line.

Here, we break down in more detail what an RBCA is, how they compare to local authority building control, and how Harwood applies this across the sectors we work in every day.

What is a Registered Building Control Approver?

A Registered Building Control Approver is an organisation authorised by the Building Safety Regulator (BSR) to carry out building control functions on construction projects – checking that designs and work on site comply with the Building Regulations. Individual surveyors within an RBCA who are qualified and authorised to inspect and sign off work are known as Registered Building Inspectors (RBIs).

In practice, this means an RBCA:

• Reviews architectural drawings and technical design information before work starts, to confirm they meet the Building Regulations.
• Carries out site inspections at key stages of construction, from foundations through to completion.
• Works alongside developers, contractors, architects and consultants throughout the life of the project, not just at sign-off.
• Issues the formal certification confirming the completed building complies with the regulations.
• Flags potential compliance issues early, before they become costly problems on site.

Every RBI operating within an RBCA is individually registered with the Building Safety Regulator, which means their competence, conduct, and ongoing professional development are held to a nationally regulated standard – an important safeguard introduced in direct response to the Grenfell Tower Inquiry and wider building safety reform.

RBCA vs local authority building control: what’s the difference?

Both routes exist to achieve the same outcome – confirming that a building meets the Building Regulations – but they operate differently.

Local authority building control is run by the council and funded through public fees. An RBCA is a private-sector alternative, chosen and appointed directly by the client. Because building regulations are a national standard, the legal requirements themselves don’t change depending on which route you take. What does change is the level of service, responsiveness and continuity you get along the way.

This is where working with an RBCA like Harwood adds genuine value to a project:

• A single point of continuity: The same team follows your project from initial design review through to final certification, rather than different officers picking up different stages.
• Proactive, not just reactive, involvement: We’re brought into project planning early, which means potential compliance issues are identified and resolved before they cause delays on site.
• Faster response times: As a dedicated partner, not one of many services run by a local authority, we can prioritise your project’s timeline.
• Sector-specific expertise: Our surveyors bring direct experience of the regulatory detail relevant to your building type, so advice is practical and specific, not generic.
• Consistency across multiple sites or phases: For clients with repeat or multi-site programmes, working with the same RBCA builds up shared understanding, tailored processes and fewer delays with every project.

What sectors does Harwood cover as an RBCA?

Harwood provides Registered Building Control Approver services across both commercial and domestic projects, spanning a wide range of sectors, including:

• Healthcare – from routine refurbishment to complex clinical environments with demanding compliance requirements, including compliance with healthcare-specific Health Technical Memoranda (HTM).
• Education – schools, colleges and university buildings, where safety, accessibility and fire strategy are closely scrutinised, including rigorous application of Building Bulletin 100 (BB100) guidance
• Data centres – highly technical builds with specific fire, structural and services considerations.
• Modular construction – offsite and volumetric methods, which bring their own set of compliance challenges around interfaces, transportation and site assembly.
• Office fit-out and refurbishment – from Cat A shell works to full Cat B fit-outs in occupied or part-occupied buildings.
• Residential and domestic projects – from single dwellings to larger residential developments.

Each sector brings its own regulatory complexities, and our team’s depth of experience means we understand the detail that matters in each one, rather than applying a one-size-fits-all approach.

Why choose Harwood Building Control?

At Harwood, we’re dedicated to being your trusted partner in providing expert building control services across a variety of sectors. With a deep understanding of the complexities each sector brings, we’re committed to ensuring strict adherence to all regulations. Here’s why clients choose to work with us:

• Collaborative: Our proactive approach ensures we’re involved in project planning from the outset, helping prevent potential pitfalls and ensuring smooth execution. We work closely with you, not just to get approval, but to help create better buildings.
• Efficient: We actively ensure these projects comply with building regulations without slowing down the programme.
• Nationwide Coverage, Local Expertise: Harwood has offices nationwide, in Canterbury, Milton Keynes, Sheffield and London/Surrey, so you get local expertise backed by nationwide coverage.
• Experience: Our team has many years’ combined experience across a variety of sectors
• Accreditations & Memberships: We’re ISO 9001 accredited, fully registered with the BSR, and a Constructionline Gold member.
• People & Partnership: Our team is approachable, responsive and thorough, and we build long-term relationships that go beyond a single project.

If you’d like to understand more about how Harwood can add value or would like to work with us on your next project, get in touch with our team.