Indicative 4 kWp install in Glasgow: £6,650–£7,800. Region: Scotland / North / NI (×0.94). Annual irradiance: ~820 kWh/kWp.
What Glasgow homeowners actually pay
Glasgow is the cheapest of the large UK cities for solar, helped by lower labour rates and a competitive central-Scotland market. A 4 kWp install on a Southside semi or West End conversion runs £5,200–£6,800. Tenement flats are the most complex job because the roof is shared — you'll need every owner's signed consent before scaffolding can go up. Generation is lower than England (~820 kWh/kWp/yr) but the Home Energy Scotland interest-free loan changes the payback maths significantly.
Local notes for Glasgow
Slate roofs on West End sandstone tenements need careful mounting — many installers use hooked rails for slate.
Tenement common roofs are shared property — you need every owner's written consent before installing.
Irradiance ~820 kWh/kWp/yr — UK lowest band, so factor lower annual generation.
Scotland's Home Energy Scotland grant and interest-free loan can fund up to £6,000 of the install.
Home Energy Scotland offers an interest-free loan up to £6k for solar + £6k for battery.
Annual generation: ~820 kWh per kWp — about 15% below the south of England.
Frequently asked questions
Can I install solar on a Glasgow tenement flat?
Only if every owner in the close (typically 4–8 flats) gives written consent — the roof is shared common property under the Tenements Scotland Act. Most tenement installs are scrapped at this stage.
Is Glasgow's lower irradiance a deal-breaker?
No — payback is still 9–13 years for most installs once the Home Energy Scotland interest-free loan is factored in. The lower generation is offset by the lower install cost and the loan.
What about Scottish Building Standards instead of MCS?
MCS still applies for the Smart Export Guarantee and most warranty conditions. Building warrants from the council are only needed for unusual structural changes, not standard panel installs.