Building Regulations Explained: Approved Documents A–T

Let’s dive into the world of Building Regulations! 

If you work in any of these areas – construction, design, or building control. You’ll know first hand how important it is to keep up with these documents. This blog gives a simple overview of Approved Documents A-T, along with the often forgotten Regulation 7, and I will explain what each covers and why it matters.

Structural Integrity and Core Safety: 

Approved Document A – Structure: 

At the heart of Building Regulations lies Approved Document A, this ensures that buildings are designed to remain safe and stable throughout their lifespan. It covers the ability of a structure to withstand: 

People and occupancy. 
Furniture and equipment.
Snow and wind.
Ground movement. 

It also covers foundations, stability, and disproportionate collapse. This document ensures that buildings don’t just stand up, they stand up safely. 

Approved Document B – Fire Safety: 

Fire safety is one of the most critical areas of building design. As fire safety guidance is continuously changing, this means that this document is one of the most frequently updated documents. This document is split into two volumes: Volume 1 – Dwellings and Volume 2 – Buildings other than dwellings. This document sets out requirements for: 

Fire resistance of structural elements. 
Safe escape routes. 
Fire detection and alarm systems. 
Access for firefighting services. 

Approved Document K – Protection from Falling, Collision, and Impact:

Safety in everyday use is just as important as structural safety. It ensures that areas of a building where people could fall, trip, or collide are designed with safety in mind. This document focuses on preventing common injuries by regulating: 

Stairs and ramps.
Balustrades and guarding. 
Glazing safety. 
Collision hazards. 

Comfort and Living Quality: 

Approved Document E – Sound Insulation: 

Noise can have a significant impact on quality of life. Approved Document E helps reduce both airborne and impact sounds, helping to create more comfortable and private living environments. It covers sound insulation between: 

Dwellings. 
Rooms within buildings. 
Floors and walls.

Approved Document O – Overheating: 

This document was introduced recently and as climate conditions change, overheating has become a growing concern. So this document introduced measures to limit overheating in residential buildings by addressing: 

Solar gain. 
Ventilation strategies. 
Building orientation and shading. 

Water, Waste and Utilities:

Approved Document G – Water Safety: 

Part G deals with water systems as these must be safe and efficient. It ensures that plumbing systems are both safe to use and environmentally responsible. This document addresses: 

Hot water safety (including scald prevention). 
Water efficiency measures.
Protection against contamination. 

Approved Document H – Drainage and Waste Disposal: 

Every building must safely manage waste and water. Proper drainage design will prevent flooding, contamination, and hygiene issues. Essentially, it ensures that waste is safely removed from the building. So, this will cover: 

Foul water drainage. 
Surface water management. 
Waste disposal systems. 

Approved Document J – Heat Producing Appliances: 

Heating systems must be installed and operated safely, which is where part J comes to life. It covers fireplaces, boilers, stoves, and flues, and ensures safe installation by regulating: 

Ventilation. 
Flue sizing. 
Carbon monoxide protection. 

Approved Document P – Electrical Safety: 

This document part applies to electrical installations in dwellings. By ensuring that electrical work is designed and carried out safely to prevent risks such as electric shocks and fires. 

Sustainability and Future Proofing: 

Approved Document L – Energy Efficiency: 

This document is a large one, and it focuses on energy performance in both new and existing buildings. Part L sets the standards for and plays a vital role in reducing carbon emissions and improving energy efficiency for: 

Insulation. 
Heating systems. 
Lighting. 
Airtightness. 

Approved Document S – Electric Vehicle Charging: 

This is another recent addition, and with the rise of electric vehicles, buildings must adapt. Part S ensures that new developments include: 

EV charging points, or
Infrastructure to support future installation. 

Approved Document R – Digital Infrastructure: 

Modern buildings must support modern connectivity. So, part R requires new buildings to include the necessary infrastructure, such as ducts and cabling, for high-speed internet. This ensures that buildings are ready for the digital demands of today. 

Accessibility, Security and Use:

Approved Document M – Accessibility: 

This part ensures that buildings are accessible to everyone, including disabled people, which is a legal requirement. It typically addresses: 

Step-free access.
Door widths and circulation. 
Lifts and facilities. 
Sanitary facilities. 

Approved Document Q – Security: 

Security is a key consideration in residential design, as it helps protect occupants and new dwellings from unauthorised access. Part Q sets the standards for: 

Doors and windows. 
Resistance to forced entry. 

Approved Document T – Toilets and Sanitary Facilities:

Sanitary provision is essential in non-domestic buildings, things like – offices, shops, schools, and leisure centres. Part T ensures that adequate and suitable toilet facilities are provided, covering: 

Separate facilities for men and women. 
Accessible toilets where appropriate. 
Privacy.
Layout and provision standards. 

Ultimately, this document part ensures that every building is safe and hygienic. 

Overarching Principle: 

Regulation 7 – Materials and Workmanship: 

Finally, Regulation 7 supports the entire Building Regulations framework. It requires that: 

Materials used are appropriate and suitable. 
Workmanship is carried out to a proper standard. 

Even if all technical requirements are met, poor workmanship can still lead to failure. Which is why this part supports the entire framework. 

Conclusion: 

Each document plays a vital role in shaping how buildings are designed and built across the UK and understanding how they work together not only helps ensure compliance, it leads to better, safer, and more sustainable buildings. 

If you need guidance on Building Regulations or support with your project, feel free to get in touch today. We’re always happy to help. 

For more expert advice on surveying and property matters, check out our range of informative videos on our website or YouTube channel. Harrison Clarke Chartered Surveyors is here to guide you every step of the way!

At the time of writing, we have a total of 155 reviews across Trustpilot and Google. We are proud to say that the average rating is over 4.9/5.

Discover something you would like to know more about?

Harrison Clarke Team - Dave

About the author

David Wallbridge, BSc (Hons) Grad Dip MFPWS MRICS

Associate Director

David started his career in 2007 working his sandwich placement at Rund Partnership Limited while completing his post graduate course in Building Surveying. David continued his career with Rund as a building surveyor, specialising in project management, focusing on delivering social housing. Becoming chartered in 2015, David opened his own building surveying practice and became a director of Talisman Homes, his family run business, where he applied valuable management and technical skills to private residential property development. 

After running his own company for 7 years where he served a variety of different clients, David made the decision to move back into more traditional employment, spending a year with large national multi-disciplinary practice Ridge and Partners LLP, before starting at Harrison Clarke in 2023