What Is a BREEAM Flood Risk Assessment?
Flooding is becoming a much more significant issue for developments across the UK, and understanding how water interacts with a site is essential for creating safe and sustainable buildings. For projects working toward BREEAM certification, a Flood Risk Assessment often called a BREEAM FRA plays a vital role in demonstrating that a development is both resilient and designed with long term climate impacts in mind.
A BREEAM Flood Risk Assessment reviews every potential source of flooding that could affect a site. This includes river and coastal flooding, surface water, groundwater, sewers and artificial sources such as reservoirs or canals. It also looks at how these risks may evolve over time due to climate change. This is particularly important, as many developments will be in place for decades and must be designed to cope not only with today’s conditions but also with future rainfall patterns and rising water levels. By taking a full and forward looking approach, a BREEAM FRA helps ensure that a development remains safe and functional throughout its lifetime.
Unlike a standard planning Flood Risk Assessment, which focuses on meeting local planning requirements, a BREEAM FRA takes a broader and more holistic view. It assesses how the development will perform in the long term, how safe it will be for occupants and what effect it may have on the surrounding environment. The assessment reviews the characteristics of the site including ground levels, natural drainage patterns, soil conditions, historic flood events and the way water moves both on and off the land. It also checks whether the development could unintentionally increase flood risk for neighbouring properties or local infrastructure.
Reducing Risk with Sustainable Drainage & Mitigation Strategies
One of the most valuable outcomes of a BREEAM FRA is the set of practical recommendations it provides for managing and reducing risk. These measures can include raising finished floor levels to reduce the chance of water entering buildings, planning safe access and escape routes in the event of flooding, and incorporating sustainable drainage systems to manage surface water more effectively. The assessment may also advise on groundwater mitigation, compensatory storage or adjustments to the site layout to help water flow away safely. These recommendations support not only the safety and resilience of the development but also its wider sustainability performance.
A strong and well considered BREEAM FRA supports key areas of the BREEAM assessment process. It contributes to credits related to climate adaptation, resilience, surface water management and occupant wellbeing. By addressing flood risk early in the design process, developers can avoid unexpected redesigns, reduce the risk of delays and create buildings that are genuinely equipped to deal with future environmental challenges. This ultimately leads to projects that perform better, last longer and offer greater confidence to planners, clients and future occupants.
When Should You Commission a BREEAM FRA?
Timing is critical when it comes to maximising your BREEAM scores. To achieve full credits under categories like Pol 03 (Surface Water Runoff) and Wst 05 (Adaptation to climate change), the Flood Risk Assessment must be carried out early in the design process- ideally during the RIBA Stage 2 (Concept Design). Engaging a specialist at this early stage allows flood mitigation strategies, such as permeable paving or attenuation tanks, to be integrated into the site layout seamlessly. Leaving the assessment until later stages can result in missed credit opportunities and costly retrofitting of drainage solutions.
Expert BREEAM Consultancy & Support Services
For design teams and developers aiming to meet BREEAM standards or simply seeking a clearer understanding of flood risk, working with specialists can make the process smoother and more reliable. To learn more or to arrange support with your BREEAM Flood Risk Assessment, talk to our team today.
