Architecture . Interiors . Kitchens
Flood Risk Assessments
At Hosannahs, we provide flood risk assessments to help you understand the risk of flooding of your site, property or premises. We help clients understand and manage flood risk and meet planning requirements​ through the provision of Flood Risk Assessments/ Flood Consequence Reports. We have the capability to take these strategies to full detailed design and work with developers and contractors to provide construction level information to allow the development of the site. ​
What is a Flood Risk Assessment (FRA)?
An FRA is a formal report that evaluates the likelihood and potential impact of flooding on a specific site or development project. It’s usually required as part of the planning application process in areas that may be at risk of flooding.
When do you need a Flood Risk Assessment?
You will usually need a Flood Risk Assessment (FRA) as part of planning application if your site:
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Lies within Flood Zone 2 or 3. These are ares with medium or high flood risk, as defined by Environment Agency.
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Is a large site in Flood Zone 1- typically over 1 hectare, or where there are known drainage issues.
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Faces other flood risks- such as surface water flooding, high groundwater, poor drainage or proximity to reservoirs or canals.
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Falls under Local Authority policy- some councils require an FRA based on their own flood risk evidence or strategic plans.
What is included in flood risk assessment?
We create bespoke reports and make the process simple, with a friendly team ready to support you every step of the way.
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An analysis of local flood risk data (river maps, drainage capacity, rainfall, etc.).
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Flood depth, velocity, and extent modelling.
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Consideration of climate change impacts (for example, rising sea levels, increased rainfall).
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Mitigation strategies such as sustainable drainage systems (SuDS), raised floor levels, flood storage, or safe access/evacuation routes, using the flood risk assessment.​
To complete this type of report, we review all relevant flood data from the Environment Agency, Natural Resources Wales, or the Local Planning Authority. This includes information on flood protection measures and consultations to identify the specific flood risks and considerations linked to the site and any proposed development.
Local planning authority requirements
Due to significant development pressure, Local Planning Authorities must carefully manage flood risk. This risk arises from multiple sources, including heavy rainfall, high groundwater, overwhelmed drainage systems, and nearby reservoirs. For sites identified as vulnerable, particularly to surface water flooding, the LPA will require a Flood Risk Assessment to ensure new development is safe and resilient.
How much does a Flood Risk Assessment cost?
The cost of a Flood Risk Assessment (FRA) depends on the size, location, and complexity of the site. At Hosannahs, a simple FRAs for smaller, low-risk sites can be straightforward and start from just a few hundred pounds.
We always provide clear, upfront pricing so you know exactly what to expect. Our reports are tailored to your site and requirements — no unnecessary extras.
Get in touch today for a free quote tailored to your project.
or call 02921150515 now