Flood Risk & Drainage Consultancy Pricing
Fixed, transparent fees for all services. Free no-obligation quotes within 24 hours. No hidden costs, no surprises.
Our Pricing
We believe in transparent pricing. Most flood risk and drainage consultants won't publish their fees — we do, because we think clients deserve to know what to expect before committing.
All prices below are + VAT and are indicative starting fees. Your specific quote may vary based on site complexity, flood zone and scope of work — but we always confirm a fixed price before starting, and the price you're quoted is the price you pay. No hourly rates, no scope creep, no surprises.
Free quote within 24 hours. Send us your site address, planning reference and a brief development description and we'll provide a fixed-fee quote by return — no obligation.
Flood Risk Assessments
FZ1 — Standard FRA
Flood Zone 1 sites, householder applications, minor commercial development. Basic flood source assessment, drainage overview, planning-ready report.
- All FZ1 development types
- Householder extensions in flood risk areas
- Minor change of use applications
- Delivered in 3–5 working days
FZ2 — Medium Risk FRA
Flood Zone 2 sites requiring Sequential Test evidence and full flood risk assessment including climate change, FFL recommendations and drainage strategy where required.
- Sequential Test evidence included
- Climate change assessment (EA guidance)
- Finished floor level recommendations
- Delivered in 3–5 working days
FZ3 — High Risk FRA
Flood Zone 3 sites requiring Sequential Test, detailed flood level extraction from EA models, Exception Test where required, safe access/egress assessment and full NPPF compliance.
- Sequential & Exception Test support
- Detailed EA model interrogation
- Safe access and egress assessment
- Flood resilience specification
Major Residential FRA
Major residential and commercial schemes (10+ units, large commercial, mixed use). Priced individually based on scope, site complexity and flood zone. Contact us for a fixed quote.
- All flood zones and development types
- LLFA pre-application engagement
- Hydraulic modelling where required
- Full condition discharge support
SuDS Drainage Strategies & Design
Our fixed-fee model means you always know the cost upfront — and that cost covers the full scope until the job is done. We don't charge by the hour, and we don't reduce quality to hit a price point. Fixed scope, fixed cost, delivered on time.
Outline Drainage Strategy
Outline SuDS drainage strategy for planning submission. SuDS hierarchy, greenfield runoff assessment, indicative attenuation sizing and LLFA-ready report.
- Minor and outline planning applications
- SuDS hierarchy assessment (CIRIA C753)
- Infiltration assessment (BRE 365)
- Delivered in 5–10 working days
Detailed SuDS Design
Full detailed SuDS design for planning condition discharge. Hydraulic calculations (Flow+), AutoCAD drainage layout drawings, construction specs and LLFA proforma completion.
- Attenuation sizing (Flow+ v16)
- AutoCAD drainage layout drawings
- LLFA SuDS proforma completion
- Construction specification notes
Drainage Condition Discharge
Complete drainage condition discharge package including technical response to LLFA comments, revised calculations, drawings and Maintenance & Management Plan.
- Response to LLFA technical comments
- Revised calculations and drawings
- SuDS Maintenance & Management Plan
- SuDS compliance statement
Other Services
LLFA SuDS Proforma Completion
Standalone LLFA proforma completion, or included as part of a drainage strategy instruction. All LLFA formats covered.
Flood Consequence Assessment (Wales)
TAN15 (2024) Flood Consequence Assessments for planning applications in Wales. All Welsh LPA areas covered.
Sequential & Exception Test
Sequential Test evidence and Exception Test submissions for Flood Zone 2 and 3 development. Standalone or as part of an FRA.
S23 Watercourse Consent
S23 Ordinary Watercourse Consent applications to your LLFA for culverting, bridging or watercourse diversion works.
LLFA Objection Response
Technical responses to LLFA flood risk and drainage objections. Priced based on the issues raised and technical work required.
Construction SWMP
Construction Surface Water Management Plans for silt runoff control on construction sites.
All fees shown are indicative starting fees + VAT. Complex sites, major schemes or sites requiring hydraulic modelling are priced individually. We always provide a fixed fee before starting work — contact us with your site address and we'll quote within 24 hours.
Frequently Asked Questions
Get a Free Quote
Free, no-obligation fixed-fee quote within 24 hours. All flood zones and LLFAs covered.
Get a Free QuoteOr contact us directly: 07826 705389 •