Solar installation services
No two roofs take the same installation. A slate Victorian terrace, a felted flat roof, a paddock and a warehouse each need a different mounting method, different fixings, different paperwork and a different crew plan — and the differences decide both the price and how long the system lasts. Each guide below explains one installation type properly: the method step by step, honest 2026 costs, the planning position, and the questions that catch corner-cutters.
Quick answer
Most UK homes take a pitched-roof (on-roof) installation: 8–14 panels, £5,500–£9,500 installed as at spring 2026, one to two days on the roof. In-roof suits re-roofs, flat roofs use ballasted frames, gardens take ground mounts, batteries follow PAS 63100 siting — and commercial roofs are a construction project with their own process. Each guide gives the method and the honest cost.
Pick the guide that matches your roof
Method, cost and compliance for each installation type — written to show you what a properly-run job looks like.
Commercial Solar Installation
30-250 kWp rooftop. 6-year typical payback. £30,000-£250,000.
Flat-Roof Solar Installation
3-10 kWp domestic / 20-100 kWp commercial. 8-year typical payback. £6,000-£11,000 domestic; £20,000-£90,000 smaller commercial.
Ground-Mounted Solar Installation
4-12 kWp domestic / paddock-scale. 9-year typical payback. £7,000-£16,000.
In-Roof (Integrated) Solar Installation
3.5-6 kWp. 9-year typical payback. £6,500-£11,000.
Pitched-Roof Solar Installation
3.5-6 kWp (8-14 panels). 8-year typical payback. £5,500-£9,500.
Solar Battery Installation
5-15 kWh storage alongside 3.5-8 kWp PV. 9-year typical payback. £2,500-£7,000 retrofit battery-only; £9,000-£15,500 combined solar-plus-battery.
Not sure which applies to you?
Most UK homes are pitched-roof installs; flat-roof and ground-mount suit specific properties, and in-roof comes into its own when you are re-roofing anyway. If you are weighing it up, start with the 2026 cost guide or the honest is solar worth it? assessment — or ask us and we will tell you straight which method fits your roof.