Solar Panel Cost in North London

The solar panel cost in North London is built from the same parts as anywhere else, but the inputs here change from borough to borough: semis in Havering and Harrow, purpose-built and converted flats in Wembley and Muswell Hill, terraces in Walthamstow and Wood Green, two UK Power Networks licence areas, and conservation-area rules that run from Haringey’s street-elevation directions to Waltham Forest’s permissive line on roofs. Each input below has a dated, named source.

Nothing on this page is an HCE price; that comes from a survey of your roof, supply and usage across Barnet, Harrow, Brent, Haringey, Enfield, Waltham Forest or Havering. What we fit and how a survey runs is on our solar panels North London page, and the rules for your own street are in our guide to planning permission for solar panels in North London.

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 a Harrow roof about 3,965 kWh a year, about 991 kWh per kWp, with a year-to-year variation of about ±154 kWh. Across our 14 North London town pages the figure runs from about 3,938 kWh in Edgware to about 4,055 in Romford, a spread of about 117 kWh (our arithmetic). Roof direction and shading matter far more than the borough.

Ofgem’s Typical Domestic Consumption Value from 1 July 2026 is 2,500 kWh a year, so that Harrow roof makes about 1.6 times what a medium household uses (our arithmetic: 3,965 ÷ 2,500). The catch is timing. The same PVGIS run gives about 477 kWh in June and about 140 kWh in December, so December makes about 29% of June (our arithmetic). Much of a summer afternoon’s output is exported unless someone is home, an appliance runs at midday or a battery stores it.

Harrow is a fair test case: 37.1% of its 89,642 households live in semi-detached houses and 11.3% in detached ones (Census 2021), so a whole pitched roof is common. 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. A unit used at home displaces one you would otherwise buy, so the share of those 3,965 kilowatt-hours 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. The same arithmetic for any town is on our solar panels Harrow and solar panels Romford pages.

Method: PVGIS 5.3 (European Commission Joint Research Centre), one run per town on 15 October 2026 (monthly figures from the same Harrow run in our battery dataset) · ONS Census 2021, TS044 Accommodation type, Harrow (Nomis) · Ofgem Typical Domestic Consumption Value · Ofgem — Smart Export Guarantee.

Two houses in the same borough can be quoted differently for the same panels. This is what changes between them here:

• The house, the roof and the scaffold. Havering is the semi-detached end of London: 41.2% of its households live in semis, the second-highest share of London’s 33 local authorities, against 18.6% for London. Harrow follows at 37.1%. Across Walthamstow’s nine wards 35.9% of households live in terraces (our sum). Brent is 38.0% purpose-built flats and 16.5% converted or shared houses. A semi, a terrace and a house split into flats each need different roof access and scaffold, and that is a real line on the quote; in a block or a converted house the freeholder’s consent comes before either.
• The inverter and the network. UK Power Networks runs the network in all seven boroughs, but on its boundary data 13 of our 14 town centres sit in its Eastern area and Walthamstow in its London area; Hendon, Tottenham and Chingford are close to that line, and central Wembley is also close to SSEN’s Southern England area, so check your own postcode. G98 covers systems up to 16 A per phase (3.68 kW); larger ones need G99 approval before work starts, and a 4 kW inverter, at 17.39 A, is just over that line. UK Power Networks approves home solar and storage automatically where the maximum export is under 5 kW, and where the supply can take the system there is nothing to pay it.
• Planning, where it applies. In Haringey, Article 4 directions in force since 21 December 2020 withdraw the solar right on the street elevations of homes in Noel Park, Tower Gardens and Peabody Cottages. In Brent, the Barn Hill and Wembley High Street directions withdraw it “with exception of rear roof slopes”. Waltham Forest says solar PV can often go on conservation-area roofs, including those fronting a highway, without planning permission. If only the rear slope is allowed, the array size and the price follow it. See planning permission for solar panels in North London.
• The rest of the house. Enfield’s semi-detached houses have a median EPC score of 60 and only 15.2% of them reach band C, so for many of them insulation belongs in the same conversation as panels.

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 via Nomis, TS044 Accommodation type (Havering, Harrow, Brent, London and all London local authorities; Walthamstow’s nine 2022 wards) · UK Power Networks, licence boundaries open data (town-centre point checks) · ENA EREC G98 Issue 2 · UK Power Networks, Solar and storage: cost, time and what’s involved · London Borough of Haringey, Article 4(1) directions (confirmed 17 December 2020) · London Borough of Brent, Barn Hill and Wembley High Street Article 4 directions · London Borough of Waltham Forest, Conservation areas and listed buildings · ONS, Energy efficiency of housing in England and Wales (28 October 2025).