Before anyone measures a Harlow roof for panels, there is a simpler question to settle: whose roof is it? Across the district, 23.9% of households rented directly from Harlow Council at the 2021 Census and another 15.4% rented privately. Most owner-occupied homes carry a restrictive covenant, whether they were built by Harlow Development Corporation and later sold or bought from the council under Right to Buy. The answer decides who you ask first, well before anyone counts panels.
This guide goes through Harlow’s housing type by type, using Census figures and the council’s own covenant and planning guidance. For what an array would generate and cost on your house, see our page on solar panels in Harlow.
Harlow’s homes in numbers
| Home type | Share of households, Harlow built-up area (Census 2021) |
|---|---|
| Terraced house | 45.0% |
| Flat, maisonette or apartment | 27.5% |
| Semi-detached house | 17.2% |
| Detached house | 10.2% |
Tenure across the district’s 37,856 households splits three ways: 53.7% own their home (23.0% outright, 30.7% with a mortgage), 29.3% rent socially, most of them from the council, and 15.4% rent privately. Those two tables together explain most of what follows.
Terraces: the commonest Harlow roof
A terrace shares its side walls but has a roof of its own. The Energy Saving Trust’s typical system, around 4.5 kWp and about 12 panels, needs 20 to 30 m² of roof, and a mid-terrace slope may take fewer panels than that. A smaller system costs less in total but usually more per kW: DESNZ’s 2025/26 median was £1,595 per kW for systems under 4 kW, against £1,546 for 4 to 10 kW.
The generation side is sound. PVGIS puts a south-facing 4 kWp array in Harlow at about 4,024 kWh a year, and terraces whose best slope faces east or west make less, which the survey models for your roof. ONS puts Harlow’s terraced houses at a median EPC score of 69, exactly on the band C line, so many owner-occupied terraces can go straight to the generation conversation rather than starting with insulation.
Which slope? Outside the conservation areas, roof panels on a house are permitted development, front or back, provided they sit no more than 0.2 m proud of the slope and no higher than the highest part of the roof. And Harlow Council’s covenant guidance states that roof-mounted solar does not need covenant permission unless the property is in a conservation area.
Flats: more than a quarter of households
In a block, the roof is usually not yours: the freeholder or managing agent decides, and roof space rarely divides neatly between flats. For a council-owned block in Harlow, that freeholder is the council. Its own recent building shows the direction of travel: its new homes at Staple Tye Depot, completed on 7 April 2026, and at Parnall Road, completed on 11 June 2026, are described on its housing pages as supporting carbon reductions through solar panels and EV charging points. For a flat owner in an older block, the first step is a letter to the freeholder, not a quote.
Council tenants and Right to Buy owners
If you rent from Harlow Council, solar is the council’s decision as your landlord, so start with your housing officer. The Warm Homes: Local Grant does not cover this case, because GOV.UK limits it to privately owned homes, whether lived in by the owner or privately rented; Harlow is one of the councils in the Essex consortium that GOV.UK lists with £6,000,000 of funding.
If you bought under Right to Buy, the roof is yours, and the covenant guidance above applies: no covenant permission for roof panels unless you are in a conservation area. In Church Langley, the council has decided not to administer restrictive covenants, so the developers’ original covenants in your deeds are the ones to check.
Semis and detached houses
Semis and detached houses together are 27.4% of households in the built-up area (our arithmetic). They usually offer more roof, easier access and a garage or utility room for a battery. Whether the house is in Newhall, Potter Street or Great Parndon, the same covenant and planning checks apply as for a terrace, and in Church Langley the developers’ covenants in the deeds are worth reading before the survey.
Ten conservation areas and Old Harlow’s directions
Harlow has ten conservation areas, and in any of them the council says covenant permission is needed for roof panels. Planning is a separate question. Since 27 August 2026 the national conservation-area exclusion covers only a wall, balcony or roof enclosure fronting a highway, but four Article 4 directions in Old Harlow change that for named addresses. The Old Harlow, Park Hill and Mulberry Terrace, and St John’s Avenue directions, all in force since 1 June 2012, and the High Street direction, since 27 February 2017, require a planning application for putting up or replacing solar panels on a roof visible from the road, at addresses on Bury Road, New Road, the High Street, Old Road, Park Hill, Mulberry Terrace and St John’s Avenue.
The Mark Hall North direction, in force since 28 October 2023, covers alterations including the front roof slope, and the Churchgate Street direction, in force from 4 March 2026, covers porches, chimneys and alterations visible from the road. Neither lists solar equipment, which sits in its own class of the Order, but covenant permission still applies in both. Listed buildings always need consent.
Where a battery goes
Most Harlow terraces have no side access, so a battery rarely goes on a side wall as it might on a semi. The realistic spots are an inside wall near the meter, a rear wall reached through the house, or a garage where there is one, and we will not put a unit where it blocks the way out. The covenant guidance does not mention batteries, so for a unit on an external wall, or in a conservation area, ask the covenant team first. A standard battery shuts down in a power cut unless backup is designed in. For sizing, see our guide to what size home battery you need, and for the rest of the battery picture, our page on battery storage in Harlow. Neighbouring towns are on our solar panels in Essex hub.
Sources: ONS, Towns and cities, characteristics of built-up areas, Census 2021 (tables 1c and 5c); ONS Census 2021, TS054 Tenure, Harlow (Nomis); ONS, Median energy efficiency score, March 2025 edition (tables 2a and 2b); Harlow Council, Covenant control, Conservation areas, Article 4 directions (Old Harlow, Mark Hall North, Churchgate Street) and housing development pages for Staple Tye Depot and Parnall Road; Energy Saving Trust, Solar panels: costs, savings and benefits explained (updated 27 August 2026); DESNZ, Solar PV cost data (May 2026); PVGIS 5.3 (European Commission JRC), PVGIS-SARAH3 2005–2023, run 15 October 2026; legislation.gov.uk, GPDO 2015 Schedule 2 Part 14 Class A as amended by S.I. 2026/896; DESNZ, Warm Homes: Local Grant guidance and successful local authorities (updated 2 July 2026).