Solar Panel Cost in Surrey

The solar panel cost in Surrey is built from the same parts as anywhere else, but the inputs are local: what a roof under the North Downs generates, a housing stock that leans heavily towards detached and semi-detached houses, a county whose west is wired by SSEN and whose centre and east are wired by UK Power Networks, and eleven borough and district councils with their own conservation areas and Article 4 directions. Each figure below has a dated, named source.

We quote for homes across Surrey, from Leatherhead, Dorking and Epsom to Guildford and Reigate. Nothing on this page is an HCE price; that comes from a survey of your roof, supply and usage. What we fit, and how the county’s towns differ, is on our solar panels in Surrey page.

On the settings we use across this site (4 kWp, 35° tilt, due south, 14% system losses, building-mounted, PVGIS-SARAH3, 2005–2023), PVGIS gives Leatherhead about 4,006 kWh a year, around 1,001 kWh per kWp, with a year-to-year swing of about ±141 kWh. At that yield a system of the Trust’s typical size would make about 4,500 kWh a year on an unshaded south-facing roof (our arithmetic: 4.5 × 1,001, rounded). We have run 11 Surrey towns the same way: they range from about 3,960 kWh in Epsom to about 4,070 kWh in Haslemere, a spread of about 110 kWh (our arithmetic), less than the smallest year-to-year swing at any one town (±128 kWh). The Met Office station at Wisley, about six miles from Leatherhead, averaged 1,584 hours of sunshine a year over 1991–2020, against about 1,400 for the UK as a whole.

Ofgem’s Typical Domestic Consumption Value from 1 July 2026 is 2,500 kWh a year, so that Leatherhead roof makes about 1.6 times what a medium household uses (our arithmetic: 4,006 ÷ 2,500). The catch is timing. PVGIS puts the same roof at about 492 kWh in July and 136 kWh in December, so December makes about 28% of July’s output, against an average month’s use of roughly 208 kWh (both our arithmetic). In July the roof makes more than twice a typical month’s use; in December, well under it. Much of the summer surplus is exported unless someone is home, an appliance runs at midday or a battery stores it.

A real roof can come in under the model, which is why a survey looks at yours. About four miles up the Mole valley, a co-founder of Dorking Solar Group reports about 2,800 kWh a year from a 3 kW, twelve-panel array fitted in 2016 on a 1930s Dorking semi; PVGIS’s unshaded due-south figure for that size in Dorking would be about 3,040 kWh (our arithmetic: 3 × 1,012). Export is paid under the Smart Export Guarantee at rates that are set by each supplier and must be above zero — they change on short notice, which is why we never print one, so the share of a Leatherhead roof’s output you use yourself, alongside the installed price, decides payback. We stop short of a £ figure: it would rest on a guessed self-use share, and the survey asks when you are in instead. Our guide to how much solar panels can save shows the method, and a Reigate house with panels and a battery is costed line by line in our Reigate worked example.

Method: PVGIS 5.3 (European Commission Joint Research Centre), Leatherhead run 8 September 2026 and 11 Surrey town runs from the towns data; monthly figures from the same Leatherhead point (PVGIS-SARAH3 satellite record 2005-2023; runs made 2026-10-15) · Dorking Climate Emergency — Walking the Talk · Met Office — Wisley long-term averages, 1991–2020 · Ofgem — Typical Domestic Consumption Values · Ofgem — Smart Export Guarantee.

A Camberley detached house on SSEN’s network and a Dorking terrace in a conservation area can need the same twelve panels and still get very different quotes. Three things account for most of the gap:

• The house, the roof and the scaffold. The mix shifts across the county. At the 2021 Census, 43.7% of Surrey Heath’s households and 40.4% of Waverley’s lived in detached houses; Mole Valley’s were 37.6% detached, 28.1% semi-detached and 12.0% terraced. Epsom and Ewell is a borough of semis (34.9%, against 26.4% detached), and in Woking 26.0% of households live in flats or maisonettes, where the roof is rarely the household’s own. A wide detached roof can take more than the Trust’s twelve panels and usually needs more scaffold; a 1930s semi with a hipped roof may have a shorter south slope than it looks.
• The inverter and the grid. A system up to 16 A per phase (3.68 kW) is notified under G98; anything larger needs a G99 approval before work starts, and a 4 kW inverter, at 17.39 A, is just over that line. Surrey is split between two network operators. On their licence boundaries the town centres of Farnham, Camberley, Godalming, Virginia Water, Haslemere, Egham and Staines-upon-Thames sit in SSEN’s Southern Electric Power Distribution area, while Guildford, Weybridge, Walton-on-Thames, Epsom, Cobham, Esher, Reigate, Dorking, Leatherhead, Redhill, Horley, Caterham and Ewell sit in UK Power Networks’ South Eastern area. Near the line the postcode decides. UK Power Networks says there is nothing to pay it unless your supply needs an upgrade.
• Conservation areas, the Surrey Hills and Article 4. Waverley lists 44 conservation areas and Mole Valley 26, three of which (Dorking, Brockham and Leatherhead) carry Article 4 directions over parts of the area. Ewell’s three directions, dated 3 February 2000, cover roof slopes fronting a highway but do not mention solar panels. Roof slopes in a conservation area keep their permitted development rights under the order as amended from 27 August 2026, but a flat-roof array there, or anywhere in the Surrey Hills National Landscape (422 km², around a quarter of the county), needs a prior-approval determination first, and a listed house needs consent wherever it is. See planning permission for solar panels in Surrey and, for one town where the designations stack, Dorking, Article 4 and the Surrey Hills.

A Switch Together round vets its installers for you; outside a round, which is where every Surrey council area stood on 19 October 2026, nobody has. Check the registers whoever quotes. HCE is registered as NAPIT member 73495, MCS-certified for solar PV and battery storage via NAPIT, and a HIES Consumer Code member (HCE/A/1392). For how a quote should be itemised, see what is in a solar quote, line by line.

Sources: ONS Census 2021 TS044 (Nomis): Surrey Heath, Waverley, Mole Valley, Epsom and Ewell, Woking · Energy Networks Association EREC G98 Issue 2 · UK Power Networks — licence boundaries · NESO — GB DNO licence areas · SSEN — Who we are · UK Power Networks — Solar and storage: cost, time and what’s involved · Waverley Borough Council — conservation areas · Mole Valley District Council — conservation areas (read 19 October 2026) · Epsom and Ewell Borough Council — Article 4 directions · Surrey Hills National Landscape · GPDO 2015 Schedule 2 Part 14.