
Get permission first
If you rent, or own a leasehold flat, you need the landlord's or freeholder's permission before fitting any solar — including plug-in kits. Listed buildings and conservation areas may also need consent.
Plug-in solar
Since 27 August 2026, plug-in solar has been legal in England, Scotland and Wales (not yet in Northern Ireland). A kit of up to 800 W plugs straight into a wall socket, and may be an option where roof panels aren't possible.
- Kits that meet UK rules cost from about £450.
- The Energy Saving Trust estimates an 800 W kit makes about 700 kWh a year and saves about £70–£100 a year, depending on how much you're at home. The government says up to £110 a year.
- Only one device per home is allowed for now, and you must register it before use.
- The Energy Saving Trust says current devices suit gardens better than balconies; a balcony needs a suitable frame and permission.
- In England, permitted development rules don't allow plug-in solar to be fixed to wooden walls, balconies, fences or timber cladding.
See our full plug-in solar guide.
For landlords
The government's Warm Homes Loan Scheme is aimed at owner-occupiers and private landlords, with loans of up to £15,000 for solar and £15,000 for batteries through participating lenders. See grants and loans.
Blocks of flats
In England, blocks of flats now have their own permitted development rules for rooftop and wall-mounted solar. For shared or communal solar on a block, speak to your freeholder or managing agent.
Mortgages and roof leases
If you own your home, note that "rent-a-roof" or free-solar schemes usually involve leasing your roof space, which most mortgage lenders must agree to. In Northern Ireland, lenders don't accept leases of roof space.
Sources
- Energy Saving Trust: Plug-in solar panels
- GOV.UK: Households can save as plug-in solar panels come to market
- Citizens Advice: Six things to know before plug-in solar panels hit UK shelves
- legislation.gov.uk: GPDO 2015 (England) Schedule 2 Part 14
- DESNZ: Warm Homes Loan Scheme – scheme rules (Sept 2026)
- UK Finance: Solar panels and the Lenders' Handbook
This guide is general information, not financial or legal advice. Rules and prices change, and some differ between England, Wales, Scotland and Northern Ireland — check the sources for your situation.