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Solar Panels in Lewisham: Costs, Planning, and Local Advice

Updated 2026-04-074 min read

Lewisham is a large south-east London borough, bordered by Southwark to the west and Greenwich to the east. It has seen significant regeneration in recent years — Lewisham town centre, Catford, and Brockley have attracted new residents, and solar adoption in the borough has grown as a result. The housing stock is predominantly Victorian and Edwardian, with a smattering of 1930s semis and post-war development.

Solar in Lewisham

The core housing type across Forest Hill, Honor Oak, Brockley, and Catford is the Victorian terrace: bay-fronted, three-bed, with a rear roof that often faces south or south-west. These are well suited to 3–4 kWp systems. Hither Green and Grove Park have more interwar semis with slightly larger roofs.

Blackheath in the east of the borough has large Victorian villas and semi-detached properties that can support 5–6 kWp installations — and higher property values that make the ROI particularly compelling.

Typical system sizes:

Victorian terraced (Catford/Forest Hill/Brockley): 3–4 kWp (7–9 panels)
Victorian bay-fronted semi (Honor Oak/Sydenham): 4–5 kWp (9–11 panels)
Larger Victorian detached or semi (Blackheath): 5–6 kWp

Costs and savings

Installation costs in Lewisham are broadly mid-London — inner-south but not the premium of Wandsworth or Lambeth.

System size	Typical installed cost	Typical annual generation
3 kWp	£4,800–6,200	~2,700–3,000 kWh
4 kWp	£6,200–7,800	~3,400–4,000 kWh
5 kWp	£7,800–9,200	~4,250–5,000 kWh

Prices include 0% VAT on supply-and-install, valid to 31 March 2027.

Lewisham property values have risen significantly in recent years. A Forest Hill or Brockley terrace now regularly sells for £550,000–750,000; Blackheath properties often exceed £900,000. At these price levels, the 4–8% uplift that solar delivers in property value is a meaningful part of the financial case.

Planning in Lewisham

Blackheath conservation area is the most prominent planning constraint in the borough. Blackheath Village and the surrounding residential streets are a designated conservation area, and panels on roof slopes visible from the highway are not permitted development. If you are in Blackheath, contact Lewisham's planning team for pre-application advice.

Brockley and Hither Green have conservation areas that follow the standard rule: rear-roof installations are usually still permitted development even within the area.

Sydenham Hill and parts of the Sydenham area near Crystal Palace also have conservation designations.

Check the Planning Portal interactive map or Lewisham Council's planning search before proceeding.

Local schemes

Lewisham Council has distributed Warm Homes Local Grant funding for eligible households with lower EPC ratings. Contact Lewisham Council's climate and sustainability team for current availability.

The national ECO4 scheme (to December 2026) and the emerging Warm Homes Plan apply to eligible Lewisham households. ECO4 is income-tested and requires qualifying heating measures alongside solar.

Brockley and Forest Hill: growing solar community

Both Brockley and Forest Hill have seen notable solar uptake in recent years — which means there are likely neighbours nearby who have been through the same process and can share their experience. Local social media groups and community forums can be a useful source of installer word-of-mouth and advice on conservation area applications in these specific streets.

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