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For practitioners · Updated 20 September 2026 · As at 20 September 2026

SDS evidence-base checklist

Use this checklist when assembling or reviewing a Spatial Development Strategy evidence base. The first block follows NPPF policy PM1. The second block is the appraisal and cumulative-effects stack. Tick only what exists as a dated document. If a box is empty, say so in the SDS. Do not invent a figure to fill it.

Print this page. Mark each row: have / commissioned / gap.

PM1 content

Required by PM1Document (title, date)Status
Growth strategy covering at least 25 years
Apportionment of housing and other strategic uses to LPAs
Broad locations for growth and regeneration
Spatial expression of Local Growth Plans / Industrial Strategy
General extent of Green Belt; broad locations for possible boundary work
Broad locations for nature; strategic historic environment
Strategic infrastructure (transport, social, waste, utilities, water, flood)
Alignment with the 10 Year Infrastructure Strategy and LTPs
Maps and diagrams
Delivery mechanisms
Monitoring framework

Act content (section 12D)

RequirementDocumentStatus
Reasoned justification for strategic policies
Stated period
Climate-change mitigation and adaptation
Account of relevant local nature recovery strategies
Confirmation that no particular sites are specified
SDS timetable (sections 12E–12F)

Appraisal and cumulative effects

TopicMethod namedZone of influenceAlternatives comparedStatus
Sustainability Appraisal / SEA
HRA including in-combination
Water resources and quality
Nutrient / water neutrality (if advice applies)
Transport and air quality
Landscape and visual (GLVIA3 if used)
Ecology (CIEEM if used)
Cross-SDS growth corridors

State, in one line, that there is no single UK cumulative-effects standard and which guidance you followed (PINS CEA advice, IEMA 2020, others).

Examination readiness (PM14)

  • Positive: needs met or a written exception after cooperation
  • Appropriate: reasonable alternatives, 10 Year Infrastructure Plan, Industrial Strategy, Local Growth Plans
  • Effective: local plans can allocate to implement the strategy; monitoring where markets must change
  • Consistent with national policy: no restated national DM policies

Sources

  1. NPPF August 2026, policy PM1 (Spatial development strategies)MHCLG, 17 August 2026
  2. NPPF August 2026, policy PM14 (Examining spatial development strategies)MHCLG, 17 August 2026
  3. Nationally Significant Infrastructure Projects: advice on cumulative effects assessmentPlanning Inspectorate / GOV.UK, 1 January 2019. Formerly Advice Note 17. States there is no single industry standard for cumulative effects assessment.
  4. Conservation of Habitats and Species Regulations 2017legislation.gov.uk, 30 November 2017
  5. Planning and Infrastructure Act 2025, inserted PCPA 2004 s.12D (contents)legislation.gov.uk, 18 December 2025

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