Flood Risk Assessment

SUR 1/SUR 2 & Flood Risk Assessment

The Code for Sustainable Homes has been introduced to encourage continuous improvement in the construction of new developments. The code is an environmental assessment method in which a development is rated based on the following points:

  • Energy and CO2 Emissions
  • Water Use
  • Materials
  • Surface Water Run-off (Sur1 & Sur2)
  • Waste
  • Pollution
  • Health and Well-Being
  • Management
  • Ecology

There are 3 achievable levels in the assessment, Code Level 3 to 6. Many councils have started to implement a minimum standard of Code Level 3 or 4 for all new developments within their jurisdiction. This in turn requires an accredited sustainability consultant to oversee the project.

To comply with the mandatory requirements for Surface Water Run-off (SUR 1), an appropriately qualified person is required to carry out hydrological calculations to assess the impact from the new development and to minimise the increase of surface water to local drainage.

Although flood risk assessments (SUR 2) is not a mandatory requirement for the Code for Sustainable Homes, it gains valuable points in which aid in acquiring your required code level.

We can undertake flood risk assessments, as required now for many planning applications in England, for single dwellings up to large gas drilling sites.

  • Preparation of flood risk assessments
  • Drainage assessments
  • Assessment of current and future risks.
  • Design of Sustainable drainage systems (SUDs)

Sustainable Drainage Systems (SUDs) have a role to play in new and existing developments. All different land use changes have an effect on the natural hydrological cycle, and needs to be carefully controlled.

Areas of expertise

Flood risk assessment: Flood risk assessment map, flood risk assessment companies, flood risk assessment uk, flood risk assessment methodology, flood risk vulnerability classification, check my flood risk wales, ea standing advice flood risk assessment, check my flood risk Hampshire.

Flood risk assessment checklist: Flood risk assessment map, flood risk assessment Hampshire, flood risk assessment Dorset, assessing flood risk, flood risk assessment methodology.


We are situated in the heart of the New Forest with Lymington, Sway, Brockenhurst, Lyndhurst and New Milton on our doorstep.

We service clients throughout Hampshire and Dorset including Bournemouth, Southampton and Winchester.

R Elliott Associates Ltd

Structural & Civil Engineers | Since 1987

We have over 30 years experience working within engineering, architectural design, planning and construction in the New Forest, Hampshire and Dorset.


Compliance with mandatory requirements for Surface Water Run-off (SUR 1), an appropriately qualified person is required to carry out hydrological calculations.

Area’s Of Expertise

SUR 1 flood risk Hampshire, SUR 2 flood risk Hampshire, SUR 1 flood risk Dorset, SUR 2 flood risk Dorset, types of runoff, runoff water cycle, groundwater runoff, surface runoff definition, runoff science.

factors affecting runoff, subsurface runoff, runoff notes, drainage assessment report, drainage assessment Dorset, surface water drainage Hampshire, surface water drainage responsibility UK, surface water drainage design guide, surface water runoff law UK, .

Surface water drainage regulations, surface water drainage design calculations,

Do you have a project we can help you with?