A change of use may require an FRA in Flood Zones 2, 3 or 3b, or in relevant Flood Zone 1 circumstances. RIDA’s broader service covers flood risk assessments for planning permission.
Get A Free No Obligation QuoteA requirement may arise from local standing advice, critical drainage matters or a change in flood-risk vulnerability, including proposals with limited physical works. The Flood risk and coastal change Planning Practice Guidance sets out the policy context. RIDA checks the position of the Sequential Test and Exception Test for your proposal; neither is assumed for every application.
Request a Change of Use FRA Quote
Get A Free No Obligation Quote| Technical deliverable | Purpose |
|---|---|
| Review of the site, application route, drawings and existing and proposed uses. | Defines the correct FRA scope for your proposal. |
| Assessment of relevant flood sources, including rivers, sea, surface water, groundwater, sewers and reservoirs where applicable. | Provides site-specific evidence beyond a flood-zone lookup. |
| Review of vulnerability, planning tests and local validation requirements. | Identifies policy evidence or related work that may be needed. |
| FRA covering applicable climate change allowances, access and egress, floor levels, mitigation and residual risk. | Supports submission and local planning authority review without guaranteeing approval. |
| Drainage or hydraulic modelling recommendations where identified by the evidence. | Clarifies any related technical commission rather than assuming extra work is required. |
The Environment Agency Flood Map for Planning supports the initial flood-zone check, but it does not replace a site-specific FRA. RIDA may use the service to check the long-term flood risk for an area when reviewing other available flood information.
Our flood risk consultants review the available evidence before confirming the commission. See the factors that influence flood risk assessment cost.
Send Your Site Details for a Scoped Quote
Request a QuoteView a relevant example of RIDA’s change of use flood risk assessment work. Project evidence is site-specific and does not guarantee the outcome of another application.
View the Elmbridge East Molesey change of use FRA projectYou may need one if flood-zone, site, vulnerability or local validation criteria apply. RIDA can review your address, proposed use and planning information to confirm the likely scope.
Yes. The proposed use may change the development’s flood-risk vulnerability and the planning evidence required, even where physical alterations are limited.
Send the site address, existing and proposed use, available drawings, application route and any planning correspondence. These details allow RIDA to assess the required work and dependencies.
RIDA can review planning authority or consultee comments. Any revisions, supporting evidence or extra technical work will follow the agreed commission or a separately confirmed scope.
Send your site address, existing and proposed use, available drawings and planning correspondence. RIDA will review the information before confirming the assessment scope, cost and programme.
Request a Change of Use FRA Quote
Request a Quote