Solar Panels in Hounslow, Greater London
Hounslow is one of the larger towns in Greater London with a population of 271,523. With a solar yield of 960 kWh/kWp and 1,570+ sunshine hours per year, the numbers stack up well for homeowners here. A typical 4kWp system generates approximately 3,840 kWh annually, covering 101% of average household electricity use. With 0% VAT on installation, the typical cost is £6,600 to £8,500 for a 4kWp system, with payback in 11 to 13 years.
Hounslow solar at a glance
The Picture in Hounslow
| Area Data | Value |
|---|---|
| Population | 271,523 (Census 2021) |
| Elevation | 15 metres |
| Postcode Area | TW3 |
| Location | Inland |
| Coordinates | 51.4680°N, 0.3620°W |
Population and housing data: ONS Census 2021.
Hounslow council schemes, planning and neighbourhoods
Hounslow homeowners can apply for solar panels through the GLA's Warm Homes: Local Grant, the council publishes its own solar guidance, and the borough has 29 conservation areas, with Article 4 directions in Bedford Park and part of Gunnersbury Park. Here is what applies before you get quotes.
Council scheme
Warm Homes: Local Grant (GLA)
The GLA runs this government grant for 31 London councils, with free or subsidised upgrades that can include solar panels and batteries where an assessor finds them suitable. It is for privately owned or rented homes rated EPC D to G, with household savings under £25,000 and usually a household income of £36,000 or less, an eligible postcode or certain benefits. Applications queue within each borough on a first come, first served basis, and demand is high.
London Warm Homes: Local GrantPlanning in Hounslow
29 conservation areas
There are 29 conservation areas in Hounslow. The council says planning permission will usually be needed for solar panels on a property in a conservation area covered by an Article 4 direction, which applies in Bedford Park and part of Gunnersbury Park to works fronting a highway, open space or waterway. Elsewhere in a conservation area, panels are usually permitted development unless on a wall fronting a highway.
Local advice
Better Homes, Better Health
A free service run by Groundwork London for the council, with a phone consultation, a home energy assessment and advice on grants for vulnerable residents. Phone 0300 365 3005.
Visit Better Homes, Better HealthSolar panels in Hounslow neighbourhoods
Towns just outside Hounslow
Compare reviewed installers in Hounslow
Google and Trustpilot ratings for MCS-certified firms working across Hounslow.
Solar panels across London
Hounslow is part of London. See London-wide costs, council schemes and planning rules, plus every London borough we cover.
About Solar Energy in Hounslow
Hounslow is a large town in Greater London with a population of 271,523 (ONS Census 2021). The postcode area for Hounslow is TW3. You'll need your full postcode when getting quotes from MCS-certified installers.
0% VAT and Savings for Solar in Hounslow
What a typical home in Hounslow needs, what it costs fitted with 0% VAT, and what it generates at Hounslow's solar yield of 960 kWh per kWp:
1–2 bed
3 kWp, 7 panels
- Output in Hounslow
- 2,880 kWh/yr
- Typical cost
- £5,700–£7,000
- Payback
- 13–15 years
3 bed
4 kWp, 10 panels
- Output in Hounslow
- 3,840 kWh/yr
- Typical cost
- £6,600–£8,500
- Payback
- 11–13 years
4 bed
5 kWp, 12 panels
- Output in Hounslow
- 4,800 kWh/yr
- Typical cost
- £8,300–£10,200
- Payback
- 11–13 years
5+ bed / EV
7 kWp, 16 panels
- Output in Hounslow
- 6,720 kWh/yr
- Typical cost
- £11,000–£13,000
- Payback
- 9–11 years
Typical yearly use: 1–2 bed about 1,800 kWh, 3 bed about 2,700 kWh, 4 bed about 4,100 kWh, 5+ bed / EV 4,100 kWh or more. Payback assumes an average export rate; the best tariffs shorten it.
Solar Installers in Greater London
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Power Cuts in Greater London Today
Live power cut map for Hounslow and the rest of Greater London, with recent power cuts and how long they usually last.
What Hounslow homeowners ask about solar
How much do solar panels cost in Hounslow?
A typical 10-panel (4 kWp) system costs £6,600–£8,500 fitted in Hounslow, with 0% VAT. Install prices vary little across the UK, but output does: in Hounslow that system generates about 3,840 kWh a year and saves around £684, paying back in roughly 11–13 years.
Is there a solar panel grant or council scheme in Hounslow?
Warm Homes: Local Grant (GLA): The GLA runs this government grant for 31 London councils, with free or subsidised upgrades that can include solar panels and batteries where an assessor finds them suitable. It is for privately owned or rented homes rated EPC D to G, with household savings under £25,000 and usually a household income of £36,000 or less, an eligible postcode or certain benefits. Applications queue within each borough on a first come, first served basis, and demand is high.
Do I need planning permission for solar panels in Hounslow?
Usually not for an ordinary house. There are 29 conservation areas in Hounslow. The council says planning permission will usually be needed for solar panels on a property in a conservation area covered by an Article 4 direction, which applies in Bedford Park and part of Gunnersbury Park to works fronting a highway, open space or waterway. Elsewhere in a conservation area, panels are usually permitted development unless on a wall fronting a highway.
Where can I get solar advice in Hounslow?
Better Homes, Better Health: A free service run by Groundwork London for the council, with a phone consultation, a home energy assessment and advice on grants for vulnerable residents. Phone 0300 365 3005.
How do I find a good solar installer in Hounslow?
Use an MCS-certified installer, so you qualify for 0% VAT and Smart Export Guarantee payments, and compare at least three quotes for the same panels, inverter and warranty. Our Hounslow reviews page ranks local firms by their Google and Trustpilot ratings.
Solar Guides & Resources
More on solar panels for Hounslow homeowners:
Sources
- MCS, Microgeneration Certification Scheme
- MCS, Find a Certified Installer
- Ofgem, Smart Export Guarantee (SEG)
- PVGIS, EU Joint Research Centre (solar irradiance data)
- ONS, Census 2021
- Met Office, Climate Data
Last updated: November 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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