Flood Risk and Drainage Consultants

A flood risk assessment (FRA) is a document that reviews a development in its proposal form to assess it against the risk of flooding, whether that be from groundwater, river (fluvial), surface water (pluvial), estuary/coastal (tidal), or from sewer sources. It should also take the surrounding area into account and whether the development poses a flood risk to areas nearby. Generally a scheme can be in a flood risk zone 1, 2 or 3.

An FRA is required under the National Planning Policy Framework (NPPF) and the Environment Agency (EA) guidance on development and flood risk when a development is located in Flood Zone 2 or 3,  a Critical Drainage Area, or the site is greater than  or equal to 1 hectare in size, for sites in Flood Zone 1.

You’ll also need an FRA if your development is taking place within 20 meters of an EA main river. EA activity permits will be required if the proposal includes temporary and permeant works within 8m of a EA river and 16m of a tidal EA river.

We provide professional hydrology consultancy and advice for many different planning applications that span the whole of the UK.

These can include standard reporting for sites within flood zone1 to more complicated reports requiring flood compensation, sequential testing, exception testing and drainage impact assessments.

Our Design Capability Includes:

  • Below ground drainage
  • SUDs design
  • Drainage strategies
  • Environmental Impact Assessment consultation
  • Flood response plans
  • Drainage Impact assessment
  • Highway drainage design
  • Section 104/185 designs
  • Drainage adoption (S104) applications

Everything that we do is compliant to BREEAM requirements to ensure your absolute peace of mind. With a flexible and efficient approach to your needs we help many clients gain the planning approval that they need in the timeframes needed.

We have a vast breadth of knowledge that sees us communicating with the Environment Agency, insurers and local planning authorities daily. What we do requires a completely bespoke approach to each of our client’s needs and we offer a professional approach that gets you what you need and when you need it.

Syntegra has experts specialising in flood risk, below ground drainage design, highways design, transportation, foul sewage and utilities assessment, geotechnics and land quality to inform critical decisions on infrastructure design. It’s an illustration of the importance of getting infrastructure right to ensure a site works seamlessly for all parties and provides ‘best value’ engineering.


Our expert team of planning specialists, sustainability consultants and Chartered Engineers are here to help.

Get in touch with us today


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