Fund emergency home energy upgrades

Policy baseline

Party capital costings include GBP 8.4bn for climate and nature, including home upgrades, renewables, grid and storage.

• Targets homes, energy networks and habitats.
• Capital spending produces benefits with lags.
• Delivery depends on skills and grid capacity.

Core trade-offs

The direct beneficiaries are households, clean-energy firms and nature projects. The costs fall mainly on taxpayers and constrained supply chains. The main economic question is poor targeting can produce low additionality.

• Households, clean-energy firms and nature projects gain most directly.
• Costs fall mainly on taxpayers and constrained supply chains.
• Key risk: poor targeting can produce low additionality.

Fiscal impact by 2028-29

+GBP 3.0bn to +GBP 11.0bn. Central estimate: +GBP 5.0bn.

• Positive numbers mean net fiscal cost; negative numbers mean Exchequer savings.
• Main channel is the scored tax, spending or delivery change.
• Offsets depend on tax receipts, behaviour and pass-through.
• Range reflects uncertain implementation and economic response.
• This is not an official costing.

Economic impact by 2028-29

• Jobs: Green construction and supply-chain jobs rise; fossil-linked jobs face transition risk.
• Wages: Skilled retrofit and energy workers may gain; households gain only if bills fall.
• Prices: Upfront costs are high; long-run energy bills may fall if delivery succeeds.
• GDP / productivity: Potentially positive through lower energy imports and innovation; delivery bottlenecks can weaken returns.

Assessment

This is a real trade-off, not a free gain. Households, clean-energy firms and nature projects benefit, while taxpayers and constrained supply chains bear most costs. Overall output depends on behaviour, capacity and pass-through.

Confidence: Medium-low. Higher on the policy target and fiscal channel; lower on behaviour, pass-through and economy-wide effects.

Main risks

• Supply-chain limits: Skills, grid connections and materials can delay delivery.
• Cost overruns: Retrofit and energy projects often face uncertain unit costs.
• Weak additionality: Public money can replace private investment rather than add to it.

Safeguards

• Publish project pipelines and unit costs.
• Use competitive procurement where possible.
• Report additional private investment mobilised.

Academic evidence

UK government evidence

Sources

• PolicyLens illustrative scenario methodology for fund emergency home energy upgrades Internal - PolicyLens, 2026
• The Environment and Directed Technical Change Academic article - Acemoglu, Aghion, Bursztyn and Hemous, American Economic Review, 2012
• Carbon Taxes and CO2 Emissions Academic article - Andersson, American Economic Journal: Economic Policy, 2019
• Funding a Fair Deal: Liberal Democrat Manifesto Costings Party costing - Liberal Democrats, 2024
• For a Fair Deal: Liberal Democrat Manifesto 2024 Party policy source - Liberal Democrats, 2024

Other Liberal Democrats policies

• Introduce free personal care
• Raise Carer’s Allowance by GBP 20
• Create a Carer’s Minimum Wage
• Scrap two-child and benefit caps
• Recruit 8,000 more GPs
• Guarantee urgent NHS dentist access
• Put counsellors in schools
• Extend free school meals