How much do solar panels for office buildings cost?
Real UK costs by system size, sub-vertical, and financing route. Updated for 2026.
Cost ranges by sub-vertical
Corporate Headquarters
- Typical system
- 300-1000 kW
- Project value
- £270,000-£900,000
- Payback
- 6 years
- Annual generation
- 275,000-920,000 kWh
Multi-Let Office Buildings
- Typical system
- 100-500 kW
- Project value
- £90,000-£450,000
- Payback
- 7 years
- Annual generation
- 92,000-460,000 kWh
Serviced & Managed Offices
- Typical system
- 75-400 kW
- Project value
- £68,000-£360,000
- Payback
- 7 years
- Annual generation
- 69,000-368,000 kWh
Coworking Spaces
- Typical system
- 50-200 kW
- Project value
- £45,000-£180,000
- Payback
- 6.5 years
- Annual generation
- 46,000-184,000 kWh
Business Parks & Office Parks
- Typical system
- 200-2000 kW
- Project value
- £180,000-£1,800,000
- Payback
- 6.5 years
- Annual generation
- 184,000-1,840,000 kWh
Government & Public Sector Offices
- Typical system
- 150-800 kW
- Project value
- £135,000-£720,000
- Payback
- 7 years
- Annual generation
- 138,000-735,000 kWh
Professional Services Offices
- Typical system
- 60-300 kW
- Project value
- £54,000-£270,000
- Payback
- 6.5 years
- Annual generation
- 55,000-276,000 kWh
Tech & Software Offices
- Typical system
- 100-500 kW
- Project value
- £90,000-£450,000
- Payback
- 6 years
- Annual generation
- 92,000-460,000 kWh
Cost questions
How much do solar panels for office buildings cost in the UK?
Installed cost in 2026 ranges from £700-£1,000 per kWp depending on system size, roof type, and inverter spec. A 100 kWp office system typically costs £90,000-£100,000; a 500 kWp HQ system £350,000-£450,000; a 1 MWp business park £700,000-£950,000. We provide fixed-price quotes within 7 working days of receiving your half-hourly meter data.
What's the payback period on office solar in 2026?
5-7 years on cash purchase for most UK offices, 0 years on PPA (cash-flow positive from day one). The exact number depends on your day-rate electricity cost (every 5p/kWh moves payback by roughly 0.5 years), self-consumption ratio (offices typically hit 70-85% without battery), and whether you can claim AIA in year one. Our model is from half-hourly data, not blended-rate assumptions.