Solar ROI by Property Type

Which property type gets the best solar ROI?

Solar panel ROI by UK property type: DETACHED HOUSE: Typical system: 5-6kW (13-15 panels). Cost: £7,000-£9,000. Annual savings: £850-£1,200. Annual ROI: 12-15%. Payback: 7-10 years. Advantage: largest roof, most panels, highest total savings. SEMI-DETACHED: System: 3.5-4.5kW (9-11 panels). Cost: £5,500-£7,500. Savings: £580-£850. ROI: 10-13%. Payback: 8-11 years. Good balance of cost and return. TERRACED: System: 2.5-3.5kW (6-9 panels). Cost: £4,000-£6,000. Savings: £380-£600. ROI: 8-11%. Payback: 9-13 years. Smaller roof limits system size but still profitable. BUNGALOW: System: 4-5kW (10-13 panels). Cost: £5,500-£7,500. Savings: £680-£950. ROI: 11-14%. Payback: 7-10 years. Large roof area relative to floor space. Retiree occupants = high daytime self-consumption. FLAT: Limited options — shared roof, need freeholder permission. Individual flat solar: rarely possible. Community solar schemes: emerging alternative. Sources: English Housing Survey (gov.uk), PVGIS, Ofgem, MCS installer data.