UK Solar Cost Index 2026

This index is a cleaned, citable version of the official regional table—not a survey of advertised prices. Download the complete CSV or use the table below for the latest financial year.

2025/26 regional cost per kW

| Region | All systems mean | Under 4 kW mean | Records | Coverage | |---|---:|---:|---:|---:| | London | £1,898.92 | £2,101.01 | 7,998 | 92.25% | | South East | £1,766.36 | £1,858.90 | 36,678 | 95.96% | | East Midlands | £1,744.14 | £1,839.81 | 24,687 | 98.68% | | South West | £1,739.28 | £1,887.23 | 30,971 | 98.27% | | North West | £1,714.03 | £1,799.83 | 22,983 | 96.38% | | Yorkshire and The Humber | £1,709.04 | £1,800.21 | 18,824 | 97.39% | | East of England | £1,708.36 | £1,795.76 | 28,708 | 96.61% | | West Midlands | £1,699.91 | £1,778.37 | 21,961 | 98.21% | | North East | £1,696.22 | £1,760.41 | 13,283 | 97.69% | | Scotland | £1,692.49 | £1,766.90 | 28,224 | 96.74% | | Wales | £1,645.83 | £1,838.00 | 22,460 | 97.48% |

What is included

DESNZ describes the recorded cost as solar generation equipment, installation, connection to the electricity supply and VAT where applicable. Batteries are excluded. The release covers small-scale installations in Great Britain; Northern Ireland is not included. It is labelled “official statistics in development,” so its method and historic figures may be revised in later releases.

Methodology

1. We downloaded the DESNZ Solar Costs 2025/26 (TIC) workbook released 28 May 2026.
2. We extracted the Regional costs (TIC) table without changing its values.
3. We retained year, region, sample, exclusions, coverage, overall mean and capacity bands.
4. We rounded displayed currency to two decimals. Every CSV row identifies its source and extraction date.
5. We checked that the latest regional sample totals 256,777 records. We do not create a national mean by averaging regional means because that would be methodologically wrong.

Interpreting the figures

London has the highest latest regional mean in this release and Wales the lowest. That does not prove geography alone caused the difference. System-size mix, property type, new-build share and job complexity can differ. Treat this as a quote benchmark: if a proposal is far above it, ask which extra work explains the gap; if it is far below, check equipment, warranties, scaffolding and exclusions.

Change history and reuse

• 29 August 2026: first release; 33 region-year rows covering 2023/24 to 2025/26.

The transformed CSV is free to reuse under CC BY 4.0 with credit and a link. The source data is Crown copyright under the Open Government Licence. We publish dated corrections rather than silently replacing values. Report an issue through contact.