A18Delivery risk: AmberGate: pending
Warm homes, inspected before payment
Existing action A18, assessed at the same scope.
Provisional single-reviewer assessment; not an approved business case.
- Who and where
- Low-income and fuel-poor households in inefficient homes, in England. (from the action record) Jurisdiction: England.
- Result so far
- Range if completed: 17.0–20.0 out of 30 (equal weights; not yet assessed: incremental affordability (Co))
- Funded now (baseline)
- The Warm Homes Plan allocates £4,422m of low-income home grants for 2025–26 to 2029–30. The proposal here is targeting by need plus quality assurance, within that programme. (from the action record)
- The change assessed (marginal)
- Health-linked selection, independent inspection before payment and an evaluation inside the Warm Homes grants. (from the superseded 4 October selection table)
- Domain home: Energy
- In the national plan: Equality and opportunity list
- Previous version: NP4: Fix the coldest homes first, and check the work before it is paid for (4 October 2026 slate, superseded 7 October 2026).
What the evidence supports—and the next decision
Insulation can reduce energy need, but poor installation can cause damp and costly remediation. Quality control is part of the intervention.
AI-assisted analytical follow-up · 8 October 2026. Proposed appraisal design; the attributed scores below are unchanged. No funding or delivery agreement is implied.
- Define the change
- Select homes using health and building-condition criteria; compare independently inspected upgrades with the funded baseline.
- Test whether it works
- Weather-adjusted energy use, comfort, damp, health and defects; measure rebound and follow homes beyond installation.
- Establish the cost
- Assessment, works, ventilation, inspection, remediation, maintenance and administration. Do not count grants as both a cost and a resource saving.
- Protect against harm
- Require whole-building suitability, tenant protection and enforceable defect repair before payment.
Read with the outcome evidence and sources in the full assessment. Monitoring proposals are not existing baseline measurements. A numerical benefit or cost score needs evidence for the defined increment, not just the scale of the problem.
Full assessment of Warm homes, inspected before payment: ten criteria, scenarios, delivery, costs and monitoring
The ten criteria (0–3)
Each criterion is scored 0 to 3 by the reviewer. “Not yet assessed” means unknown: it is never counted as zero.
Scale and severity (Sc)3 of 3 — Severe harm across a broad population
Reviewer’s reason: Provisional problem-importance judgement from linked site pages; not the scale of achievable benefit.
Increment beyond baseline (Ad)2 of 3 — Specific material change to existing delivery
Reviewer’s reason: Target poor-quality homes; survey suitability/ventilation; use qualified installers and independent inspection; establish redress. A missing rating requires a defined marginal change.
Confidence in the proposed action (Ev)1 of 3 — Indirect, mixed, modelled or weak causal support
Reviewer’s reason: Energy-saving evidence does not evaluate inspection-before-payment or prove health outcomes for this package.
Expected incremental benefit (Bn)2 of 3 — Material for the target population
Reviewer’s reason: Unknown unless a reasonably defined target-population benefit can be judged; no bonus merely for spanning domains.
Reason and score disagree — under review
Residual harms (Hm)1 of 3 — Material harm/unresolved mitigation
Reviewer’s reason: Damp, overheating, defects and installer constraints; inspection is not a guarantee.
Incremental affordability (Co)Not yet assessed
Reviewer’s reason: Works, assessment, inspection, maintenance, remediation and administration against existing grants.
Delivery capacity (Ca)1 of 3 — Binding scarce resource
Reviewer’s reason: Target poor-quality homes; survey suitability/ventilation; use qualified installers and independent inspection; establish redress.
Distribution (Fa)3 of 3 — Benefits concentrated on disadvantaged people with assessed burdens
Reviewer’s reason: Provisional distribution judgement for the stated target; verify who pays, who gains and excluded groups.
Meaningful first outcome (Ti)2 of 3 — More than one and up to three years
Reviewer’s reason: First meaningful outcome, not announcement: Measured energy use, comfort, health and defects; household costs.
Readiness (Rd)2 of 3 — Named commissioning/allocation/coordination step
Reviewer’s reason: Energy/housing departments, councils and installers; Quality-assured targeted delivery
Four weightings
Normalised as 10 × weighted sum ÷ sum of weights, on a 0–30 scale. Where a criterion is not yet assessed, the range is the lowest and highest result if it were later scored 0 or 3 — not a score, a confidence interval or a rank.
- Equal weights: Range if completed: 17.0–20.0 out of 30. Not yet assessed: incremental affordability (Co). Funding gate: not passed.
- Evidence doubled: Range if completed: 16.4–19.1 out of 30. Not yet assessed: incremental affordability (Co). Funding gate: not passed.
- Scale doubled: Range if completed: 18.2–20.9 out of 30. Not yet assessed: incremental affordability (Co). Funding gate: not passed.
- Cost ignored (the funding gate still applies): Range if completed: 18.9–18.9 out of 30. Not yet assessed: incremental affordability (Co). The missing criteria carry no weight here, so the ends meet; the record is still incomplete. Funding gate: not passed.
Funding gate: Not passed — the cost is not yet assessed or no allocation is committed for this scope. Ignoring cost in a weighting never removes the gate.
Delivery risk and gate
Delivery risk shown: AmberReview’s claim: Amber. Best the recorded evidence allows: Amber.
Review’s reason: Works, assessment, inspection, maintenance, remediation and administration against existing grants.
Why it is not Green yet
- Scope (population, place and increment) not verified against the delivery baseline.
- No verified owner with the powers in place.
- Delivery capacity not verified.
- Lifetime incremental costs not complete.
- No credible funding (a committed allocation for the scope).
- Safeguards not specified.
- Monitoring lacks a metric, a data source or a baseline.
Green needs verified scope, a verified owner with the powers, verified capacity, complete lifetime costs with credible funding, specified safeguards and monitoring with a metric, source and baseline. Amber means appraisal gaps remain; Red means a material delivery obstacle. Red does not mean unimportant.
Gate: Pending — appraisal incomplete (review label: “Pending: incomplete appraisal”).
Why: Scores incomplete; Funding gate not passed (cost unknown or no credible funding).
The gate is separate from national list membership: being listed does not make an option eligible, and an eligible option need not be listed.
Cost and funding
Lifetime costing: Partial — some lines costed, no whole-life total. Review: “Full incremental costing not established in reviewed material”.
- Warm Homes Plan: low-income home grants (published programme envelope; C-WHP-LOWINCOME)
- Property surveys, installation quality checks, remediation and monitoring (not costed; C-A18-QUALITY)
Still to cost: Works, assessment, inspection, maintenance, remediation and administration against existing grants.
Funding status: programme route, not allocated.
Owner, powers and capacity
Proposed owner: Energy/housing departments, councils and installers (proposed, unverified).
Powers: needs a decision or allocation. Capacity: binding constraint.
Powers and capacity read from the review’s Rd and Ca anchors; no proposed owner has agreed to act (the review: “Proposed owners have not agreed to act”).
- England:
- DESNZ and MHCLG, with councils, landlords and accredited installers (action record)
- Scotland:
- not assessed
- Wales:
- not assessed
- Northern Ireland:
- not assessed
Warm Homes Plan grants are England-focused; devolved arrangements were to be set out separately; Scotland and Wales run their own schemes.
Dependencies, safeguards and risks
Depends on: None recorded.
Safeguards
None specified yet.
Risks and residual harms: Damp, overheating, defects and installer constraints; inspection is not a guarantee.
Monitoring and measured results
Metric: Measured energy use, comfort, health and defects; household costs.
Data source: Not yet named. Baseline: Not yet established.
Measures already on the domain page
- Households in fuel poverty: latest 9.4% (2025); baseline not published (England).
A page measure is not necessarily the review’s metric; linking the two is an editorial decision still to be made.
Evidence for the outcome
Outcome: Measured energy use, comfort, health and defects; household costs.
Energy-saving evidence does not evaluate inspection-before-payment or prove health outcomes for this package.
Effect records for this action
- Gas use in homes after solid wall insulation: −17% median gas use (evaluated, moderate confidence; England and Wales)
- General, respiratory and mental health of residents: size not established (evaluated, limited confidence; Studies in several countries, searched to 2012)
- Low-income households counted as fuel poor: size not established (plausible spillover, limited confidence; England)
- Damp and mould after poorly specified or installed insulation: size not established (plausible spillover, limited confidence; England)
SWOT points it addresses
- Poor installation or ventilation can leave homes damp, and measured savings vary year to year. (Energy)
- 9.4% of households in England — about 2.36 million — were projected to be in fuel poverty in 2025, based on 2024 final estimates; these are not final 2025 survey results. (Energy)
- The Warm Homes Plan allocates £4.4bn of grants for low-income homes over five years, within £15bn of public investment. (Energy)
- Quality-assured upgrades for the least efficient homes, and electricity prices that reward clean heating, could lower bills and gas exposure together. (Energy)
Review record
Assessment status: Provisional single-reviewer assessment; not an approved business case.
Reviewer: Original assessment author (name not supplied). Reviewed: 6 October 2026.
Scored in the working review of 6 October 2026 on the shared ten-criterion scale (one reviewer); not independently calibrated.
First 90 days (review): Produce a signed scope and current-delivery baseline; Target poor-quality homes; survey suitability/ventilation; use qualified installers and independent inspection; establish redress. Obtain incremental costs and an accountable decision before expansion.
Decision route: Quality-assured targeted delivery
An earlier assessment exists on the 4 October 2026 selection table (nine H/M/L bands; superseded 7 October 2026). Its bands are kept, not converted into these scores.
An editorial screening framework by one reviewer, not a formal appraisal or business case. Proposed owners have not agreed to act.