In most suburbs the first solar question is which way the roof faces. In Muswell Hill it is often whose roof it is. Edwardian houses built for one family now hold two, three or four flats, and the largest single group of households in Muswell Hill ward lives in one of them. This guide goes through N10’s housing type by type: who controls each kind of roof, where panels fit, and what to sort out before anyone books a survey. For what an installation involves locally, see our page on solar panels in Muswell Hill.
The figures are 2021 Census ward figures, because London has no town-level Census tables. Muswell Hill ward had 3,812 households; Fortis Green, its neighbour along the ridge, is counted alongside it where that helps.
How Muswell Hill’s homes split
In Muswell Hill ward, 32.6% of households lived in part of a converted or shared house, 26.2% in purpose-built flats, 20.3% in terraced houses, 13.3% in semis and 2.7% in detached houses. Fortis Green leans the other way, with terraces leading at 28.7%. Across Haringey’s 105,092 households, 22.8% live in converted or shared houses and 35.4% in purpose-built flats, with semis at 9.4% and detached houses at 3.9%. Ownership is high for the borough: 55.4% of Muswell Hill ward households and 59.2% in Fortis Green own their home, against 37.2% across Haringey.
The history explains the stock. Haringey’s conservation-area appraisal describes an essentially Edwardian suburb laid out in under 20 years, between 1896 and 1913, much of it by the builder James Edmondson after he bought The Limes and Fortis House estates. It also notes that many houses on Queens Avenue have since been subdivided into flats.
Whole houses: terraces and semis
If you own a whole terrace or semi, the decision is yours and the roof is the question. An Edwardian roof in N10 is rarely a clean rectangle: dormers and chimney stacks break it into planes, and the main slope’s direction decides output. PVGIS 5.3 gives about 3,955 kWh a year from 4 kWp facing due south at 35° at Muswell Hill Broadway, roughly 989 kWh per kWp, with about 475 kWh in June and 142 kWh in December. The Energy Saving Trust’s typical 4.5 kWp system needs around 12 panels over 20 to 30 m² of roof, and on a narrow terrace one slope may not hold that many. The survey measures what actually fits.
Converted houses: one roof, several owners
This is the Muswell Hill case. In a house split into flats, the roof is normally held by the freeholder or shared between leaseholders, and the top-floor flat does not own it just by living under it. Before any design, the owners need to agree who pays, who benefits and who maintains the system. There is also a wiring question: an array is normally connected to one electricity supply, so the owners decide whether it feeds one flat, or a shared landlord supply where there is one, or whether each flat has its own smaller system. On a small Edwardian roof, a third of an array may be too little to justify the cost, and we would rather say that at the start.
Purpose-built flats
Part 14, Class A of the permitted development order covers solar on a block of flats as well as on a house, with its own conditions, but the right sits with whoever controls the building. With 26.2% of Muswell Hill ward households in purpose-built flats, a leaseholder’s route is to raise a communal array with the freeholder or managing agent.
If you rent
Renting decides it for you: the landlord controls the roof. Haringey’s own guidance reminds landlords that it is unlawful to let a home rated EPC F or G without a valid exemption, and in the Hornsey and Friern Barnet constituency the median EPC score is 68, band D, with only 25.5% of terraced houses and 18.7% of semis reaching band C. For many N10 landlords insulation comes before panels.
A battery in a converted house
A battery adds a siting question. In a flat, it needs a place that meets the manufacturer’s manual and the BSI’s PAS 63100 fire-safety standard, and consent from the freeholder before anything is fixed to the building. In a whole house there are usually more options, such as a utility space near the consumer unit. Our page on a home battery in Muswell Hill covers the options, and our guide to what size home battery you need covers sizing.
Planning, briefly
Muswell Hill and Fortis Green have been conservation areas since 1 March 1974. Neither carries an Article 4 direction, so roof-mounted solar on a house remains permitted development within the 0.2 m and roof-height limits; the conservation-area exclusion covers only equipment on a wall, balcony or roof enclosure fronting a highway. The Rookfield Estate’s 1978 direction does not name solar equipment, and we read it against any Rookfield address.
Help with the cost
The Power Boost Haringey Fund, from March 2026, offers private homeowners 15% cashback for two types of measure or 25% for three, up to £5,000, with solar and a battery counting as one type. Switch Together, formerly Solar Together, says it is not open in Haringey at the moment. Residential solar carries 0% VAT until 31 March 2027, then 5%. Our guide to how much solar panels can save shows how to read the sum for your own bills, and our solar panels in North London hub covers the wider area. You can ask for a survey through our contact page.
Sources: ONS Census 2021, TS044 accommodation type and TS054 tenure, Muswell Hill (E05013594) and Fortis Green (E05013589) wards and Haringey (E09000014), via Nomis; London Borough of Haringey, Muswell Hill Conservation Area Character Appraisal (adopted 11 February 2008), List of conservation areas, Rookfield Estate Article 4 Direction 1978, Power Boost Haringey scheme and retrofit design guide (planning and other statutory regulations); ONS, Energy efficiency of housing in England and Wales, EPC records to March 2025 (tables 4a and 4b); PVGIS 5.3, European Commission Joint Research Centre (PVGIS-SARAH3 2005–2023; 4 kWp, 35°, due south, 14% losses; Muswell Hill Broadway run 15 October 2026); Energy Saving Trust, Solar panels: costs, savings and benefits explained (updated 27 August 2026); legislation.gov.uk, GPDO 2015 Schedule 2 Part 14, as amended by S.I. 2026/896; Switch Together, Haringey page; HMRC, VAT Notice 708/6.