View of a Cornish beach scene with a sandy pathway leading to the shore, wooden posts with rope fence, rocks and pebbles on the sand, people in the water, and a bright sky reflected on the ocean.

Drainage Design, Flood Risk Assessments and Highway Design for Planning

Supporting developers, architects, planning consultants and private clients across Cornwall and the Southwest with fast, compliant and cost-effective design.

Our Services

Highway Drainage located in Mawgan Porth, Cornwall. Drainage Design Services in the Southwest of England

Drainage Design

Cost-effective, adoptable and private drainage strategies to support planning and technical approval in Cornwall and the Southwest.

  • Adoptable drainage (S98 / S104 / S106 / S185)

  • Private foul and surface water design

  • SuDS strategies and greenfield runoff

  • Planning negotiations and LLFA liaison

Image showing Cornish River to demonstrate the consultancy's flood risk assessment services. Flood Risk Assessments, Cornwall

Flood Risk Assessment

Clear, policy-compliant FRAs that identify constraints early and unlock development potential.

  • Flood Zone 2, 3a and 3b assessments

  • Critical Drainage Area assessments

  • Sites over 1 hectare

  • Hydraulic modelling of watercourses

Image showing highway to demonstrate highway design capabilities

Highway Designs

Practical, adoptable highway layouts that connect your development with confidence.

  • Residential and commercial road design

  • S38 and S278 agreements

  • Pavement design and specifications

  • Feasibility and planning layouts

At Flows and Roads Consulting, we provide practical and responsive engineering support for planning and development projects across Cornwall and the South West. With nearly a decade of industry experience, we work closely with developers, architects and planning consultants to deliver clear, buildable solutions for drainage design, flood risk assessments and highway design.

We understand the importance of meeting planning deadlines and reducing delays, which is why we focus on fast turnaround times, clear communication and technically robust designs. From early feasibility advice through to technical approvals and authority liaison, our aim is to help move projects smoothly from concept to approval.

Engineering Support Across Cornwall and the South West

We support development projects across Cornwall, including Redruth, Truro, Newquay, Falmouth, Camborne and surrounding areas, as well as the wider South West.

Our services include drainage design strategies, flood risk assessments and highway layouts for planning applications, supporting residential, commercial and mixed-use developments. Whether you need support for an outline application, reserved matters submission or detailed technical design, we provide practical advice tailored to your site and local authority requirements.

Why Choose Flows and Roads Consulting

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Wheal Coates. Flood risk assessment consultant Cornwall. SuDS design for housing developments, Cornwall.

Contact Us

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