Drainage-Ready Planning and Development Copilot

Liverpool's ageing combined sewer and culvert network is at or near capacity. The 2026 IDP says current drainage and sewer infrastructure is insufficient for significant new development without upgrades and that development may be restricted until major works are complete. Developers can spend heavily on land, layouts and applications before discovering that drainage evidence, outfall strategy or network timing makes the programme unacceptable or uneconomic.

The evidence is fragmented across national flood maps, strategic assessments, Section 19 investigations, sewer-provider enquiries, ground data, local policy and site-specific engineering. Planning teams and United Utilities also need consistent early information on units, floorspace, build-out and drainage approach to understand cumulative demand.

- SME developers and land buyers that cannot commission full technical work on every candidate site. - Architects and planning consultants needing an early, evidence-based drainage brief. - Lead Local Flood Authority and development-management officers reviewing inconsistent submissions. - Water companies assessing cumulative development and connection timing. - Communities exposed to surface-water and sewer-flooding risk.

Local evidence: - Liverpool's IDP identifies significant culvert-failure and sewer-flooding risk, says surface-water upgrades are urgently needed and warns that development may be restricted until major infrastructure is delivered. - It describes an ageing combined network at or near capacity, notes that recent flood investigations recommended integrated catchment modelling and says phasing should be linked to infrastructure resilience. - The draft Local Plan requires infrastructure sufficiency and early provider engagement, making drainage readiness a planning and delivery issue rather than only an engineering issue.

National evidence: - Environment Agency guidance says an LPA may refuse an application if a required Flood Risk Assessment is missing or unsatisfactory, and national SuDS guidance defines the expected strategy content.

Commercial implication: - The cost of late redesign, application delay or stranded land supports per-site screening plus enterprise subscriptions.

- The local evidence uses unusually strong language: infrastructure is insufficient, upgrades are urgent and development may be restricted. - Developers routinely need paid flood-risk specialists for non-simple sites. - United Utilities requests structured development information and early engagement to assess growth. - New national standards and updated maps create an ongoing rules-and-data maintenance need.

The Environment Agency provides authoritative maps and guidance; GeoSmart and other environmental-data vendors sell site reports; engineering consultancies deliver FRAs, hydraulic models and SuDS design. These are strong incumbents in their respective layers.

A viable entrant should orchestrate rather than duplicate them: combine authoritative sources, local validation requirements and proposed-scheme data into a readiness score, evidence request and specialist workflow.

A map-led pre-application product where a developer enters a boundary, land use, unit count, floorspace and build-out profile. The system identifies flood sources, local policy tests, likely FRA/SuDS requirements, known network constraints, missing evidence and recommended provider engagement.

For councils and utilities, aggregated consented and pipeline schemes create a cumulative-demand view while protecting applicant confidentiality.

Underserved score 91/100

Evidence 25/25 + severity 20/20 + buyer urgency 18/20 + market gap 12/15 + timing 9/10 + delivery feasibility 7/10 = 91/100. Confidence is 91/100 because the IDP identifies a direct growth constraint and national guidance defines a paid specialist workflow; principal uncertainty is data licensing and liability management.