Indicative 4 kWp install in Bath: £6,750–£7,900. Region: UK average (×0.98). Annual irradiance: ~940 kWh/kWp.
What Bath homeowners actually pay
Bath is the hardest of the south-west cities to install solar in — and one of the most rewarding when you do. The UNESCO World Heritage status and city-wide conservation area mean front-elevation panels are effectively off the table inside the centre, and many Georgian and Victorian houses are listed. Outer Bath (Combe Down, Oldfield Park, Twerton) is much more straightforward. Expect £6,200–£8,000 for a 4 kWp install, with around 3,820 kWh produced per year.
Local notes for Bath
Entire historic centre is a UNESCO World Heritage Site — extremely strict on front-elevation panels.
Most of central Bath sits inside the Bath Conservation Area; many homes are Grade II listed.
Bath stone slate and clay-tile roofs — installs need careful fixing selection to avoid stone damage.
DNO is NGED — G99 sign-off typically 4–6 weeks for BA1 and BA2.
Field notes
Generation ~3,820 kWh/yr from a typical 4 kWp south-facing array.
Listed Building Consent often required — even for rear-roof installs.
DNO is NGED — typical G99 sign-off in 4–6 weeks.
Frequently asked questions
Can I install solar in central Bath?
Rarely on the front, and only with planning consent on the rear if the building is listed. The City of Bath Conservation Area covers most of BA1 and the council assesses each application individually. Outer suburbs (Combe Down, Twerton, Oldfield Park) are far more straightforward.
What system size suits a typical Bath home?
3–4 kWp on most Oldfield Park or Twerton terraces. Larger Combe Down and Bathampton semis often fit 5–6 kWp with battery.