Retrofit cost and improvement guides
What each home energy measure typically costs in the UK, how much it can save, and the grant schemes that may help. Cost and saving figures are indicative ranges attributed to named public sources on every page.
Loft insulation cost, savings and payback
What loft insulation typically costs to install in a UK home, how much it can save on heating, and the grant schemes that may cover it.
Cavity wall insulation cost, savings and payback
Typical UK cost of filling an unfilled cavity wall, the heating saving it can deliver, and how to check whether your walls qualify.
Solid wall insulation cost, savings and payback
What internal and external solid wall insulation cost for a UK home with no cavity, plus the savings and the trade-offs of each approach.
Heat pump cost and the Boiler Upgrade Scheme grant
Typical UK air source heat pump cost, the £7,500 Boiler Upgrade Scheme grant that can be deducted, and what running costs to expect.
Solar panel cost and payback in the UK
What a domestic solar PV system typically costs, how much it can cut an electricity bill, and what drives the payback period.
Double and triple glazing cost, savings and payback
Typical UK cost of replacing windows with double or triple glazing, the heat and noise benefits, and what affects the price.
Draught-proofing cost and savings
The low-cost measures that seal gaps around doors, windows and floors, and the modest but quick heating saving they deliver.
How to improve an EPC rating
What an EPC measures, the improvements that most often raise the score, and how to find or update a certificate.
ECO4 and the Great British Insulation Scheme: eligibility explained
How the two main government-backed home insulation schemes work, who they are aimed at, and where to check eligibility. Information only.
See it in a real area
These guides explain the measures in general. To see the local picture – the energy-band distribution and what the register estimates insulation could save – open an area page.
Leakiest streets by area Energy & price checkerThese pages are general information, not advice. Figures are indicative ranges from named public sources; check the official source before making a decision.