Compliance pathway
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Verdict
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Assessment inputs Classification, energy balance and the sleeving declaration — every change re-evaluates the verdict
Development type & route
District: two or more buildings from central source(s) via a pipe network. Communal: only within a single building divided into separate premises. Classify on the legal building boundary.
Only formal designation triggers connection requirements, subject to regulations, notices, thresholds and exemptions.
Eligibility is decided by the kWh balance below, not this selection.
Sleeving declaration
District heat networks only — communal networks cannot be sleeved.
Network type
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Evidence & declaration register Clause basis and live status for every declaration and evidence item
No items match this filter for the current pathway.
Decision summary Interpretation, director position and attention drivers
How the ratings are assessed
Ratings are ordinal (1–5), derived from the live result. Complexity scales with register breadth; evidence burden with open items; attention rating starts at 1 and adds weighted named drivers — declaration gaps +3, factor exposure or declaration reliance +2, procedural items +1 — capped at 5. An indicative screening score, not a statutory, insurance, cost or programme risk rating.
Release status: controlled internal use as a decision-support navigator — it does not replace SAP 10.3 / NCM compliance software, the operator declaration, third-party validation or building-control acceptance. Independently re-audited three times.
Verification basis (fixed; independent of the selected volume): Approved Document L 2026 Volume 1 (paras 1.6–1.9, Tables 1.1 & 1.2, 2.10, 4.4, 0.19) and Volume 2 (paras 1.5–1.8, Tables 1.1 & 1.2, 2.7–2.8, 3.21, 4.4–4.5, 4.19, 0.4, 0.23), both published 24 March 2026; take effect 24 March 2027, higher-risk buildings 24 September 2027; transitional period to 24 March 2028 per Circular Letter 01/2026. Cross-checked against the Notice of Approval dated 24 March 2026 (SAP 10.3 + 2026 NCM only; HEM not approved), heat network zoning material and draft HNTAS TS1. Watch items: Notice of Approval (HEM validity); FHS 2026 notional buildings document; NCM Modelling Guide updates; TS1 finalisation including sub-50°C scope; first formal zone designations.
Verification basis (fixed; independent of the selected volume): Approved Document L 2026 Volume 1 (paras 1.6–1.9, Tables 1.1 & 1.2, 2.10, 4.4, 0.19) and Volume 2 (paras 1.5–1.8, Tables 1.1 & 1.2, 2.7–2.8, 3.21, 4.4–4.5, 4.19, 0.4, 0.23), both published 24 March 2026; take effect 24 March 2027, higher-risk buildings 24 September 2027; transitional period to 24 March 2028 per Circular Letter 01/2026. Cross-checked against the Notice of Approval dated 24 March 2026 (SAP 10.3 + 2026 NCM only; HEM not approved), heat network zoning material and draft HNTAS TS1. Watch items: Notice of Approval (HEM validity); FHS 2026 notional buildings document; NCM Modelling Guide updates; TS1 finalisation including sub-50°C scope; first formal zone designations.