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Solar for Semi-Detached Houses (UK)
Semi-detached homes offer a good balance of roof space and orientation options, making them well-suited for solar.
At a Glance
Usable Roof Area
20–35 m² usable
Typical System Size
3–5 kWp
Number of Panels
7–13 panels (400W)
Annual Output
2,550–4,250 kWh
Estimated Cost
£5,500–£8,500
Ranges based on typical UK homes. Your actual figures depend on specific roof dimensions, orientation, and shading.
Constraints & Solutions
Common Constraints
- Party wall on one side — panels typically on one roof plane only
- Possible shading from the attached property's chimney or extension
- Hip roofs (common on semis) reduce usable area vs gable roofs
- Front-facing may need planning check in conservation areas
Solutions
- East-west split across front and rear can increase total capacity on hip roofs
- Optimisers handle partial shading from neighbour's chimney
- In-roof (integrated) panels can be used for aesthetic preference on visible elevations
- Larger systems (4–5 kWp) are usually achievable with careful layout
Tips for Homeowners
- Semi-detached homes are the sweet spot — enough roof for a meaningful system without excessive cost
- A 4 kWp system typically covers 50–80% of annual electricity needs
- If you have a south-facing rear roof, that's usually the best option for maximum output
- Consider future EV charging — a slightly larger system now saves upgrading later
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Our installers design systems specifically for your house type and roof.
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