Solar in London: 2026 Guide

Is solar worth it in London?

Solar panels in London — the complete 2026 guide: IRRADIANCE: 1,030 kWh/m²/yr (PVGIS) — 95% of UK maximum. London gets plenty of sun. COSTS: 10-15% above national average. 4kW: £7,000-£8,500 (vs £5,500-£7,000 national). Higher labour costs, parking/access charges, congestion. SAVINGS: £890-£1,050/yr (4kW, 40% self-consumption). Higher electricity prices in London boost savings. PAYBACK: 8-10 years — competitive with anywhere in the UK. PROPERTY VALUE: London properties command the highest solar premiums. An EPC improvement from D to B on a £500,000 London property could add £15,000-£25,000. CHALLENGES: Smaller average roof size (terraced houses, flats). Many conservation areas (check permitted development). Air pollution (minimal impact — 1-2% output reduction). More scaffolding complexity (terraced streets, parking restrictions). OPPORTUNITIES: Highest electricity prices, highest property values, strong demand from eco-conscious buyers. Sources: PVGIS (re.jrc.ec.europa.eu), GLA London Datastore, Ofgem, MCS.