Solar Panels for Gardens, Done Properly
The best solar site on many UK properties is not the roof — it is the patch of garden that faces south all day. This site covers every way to use it: ground-mounted arrays, garden rooms that earn their keep, solar pergolas, and the small-scale systems that run lights and water features. With the planning rules stated plainly and the costs in pounds, not promises.
Where the panels go decides everything else
Planning rules, costs, and yields all hang on the mounting decision. Pick your starting point.
Ground-mounted arrays
Frames in the lawn or borders, angled perfectly south. The highest-yield option per panel and the one with the most specific permitted development limits — 9m², under 4m tall, 5m from boundaries, one per property in England.
Ground array guide →Garden rooms & offices
A garden office roof is free mounting space that powers the building beneath it. Off-grid independence or a grid-tied connection through the house — the decision rests on how often you work out there.
Garden room guide →Pergolas & canopies
Semi-transparent panels as the pergola roof itself: shade for the patio, power for the house, one structure doing two jobs. The most architectural route into garden solar — and the one to cost carefully.
Pergola systems →Lighting & small-scale
Path lights, pond pumps, greenhouse ventilation, gate openers. Small dedicated panels beat both mains trenching and the disappointing solar stakes from the garden centre — if you size them honestly.
Small-scale guide →Garden solar vs roof solar, compared honestly
Both work. They fail and excel in different places — this is the comparison most installers skip.
| Garden ground array Frame-mounted, south-facing | House roof array Conventional rooftop | |
|---|---|---|
| Orientation & pitch | Always optimal — you choose | Fixed by the house |
| Permitted development ceiling | 9m² (England, conditions apply) | Whole roof, usually |
| Yield per panel | Up to 10–15% higher (angle + cooling) | Baseline |
| Cleaning & inspection | Stepladder | Scaffold or pro visit |
| Garden space cost | Real — lawn or border lost | None |
| Shading risk | Fences, hedges, washing lines | Chimneys, dormers, trees |
| Cable run | Buried armoured run to house | Short drop to consumer unit |
| Visual impact at ground level | Visible — siting matters | Mostly out of sight |
The rule that shapes every garden solar project
England's permitted development rules treat stand-alone garden solar generously but precisely: the array is often PD if it is the first one on the property, no part stands more than four metres above ground, it sits at least five metres from every boundary, the panel area stays within nine square metres, and the property is neither listed nor — without extra conditions — in a conservation area. Nine square metres is roughly four modern residential panels: about 1.8 kilowatts-peak, a meaningful contribution rather than a token. Panels mounted on a shed, garage, or garden room follow different, generally more permissive outbuilding rules; a solar pergola is usually assessed as a structure first and a solar installation second.
Wales, Scotland, and Northern Ireland each run their own versions of these rules with real differences in the details, and individual properties can have PD rights stripped by Article 4 directions or old planning conditions. So treat everything above as a map, not the territory — the planning and PD page goes deeper, and a short email to your Local Planning Authority settles your specific case for free. Budget figures for the consented and PD routes both live on the costs page.
How a garden array project actually runs
A PD-sized ground mount is one of the quickest solar projects there is — most of the timeline is waiting for paperwork you start early.
- 01Week 0
Shade-watch the site
Track sun across the proposed spot on a clear day, or use a sun-path app. An hour of midday shade from a hedge costs more yield than any equipment upgrade can recover.
- 02Week 1–2
Settle the planning question
Measure against the PD limits, email the LPA with a sketch if anything is marginal. Apply for consent now if you want more than 9m² — determination takes around 8 weeks.
- 03Week 2–4
Design and quote
Array size, frame type (driven posts vs ballast vs concrete pads), inverter location, and the armoured cable route back to the consumer unit. MCS installer if you want SEG export income.
- 041–2 days on site
Install and connect
Groundworks and frame one day, panels and electrics the next, DNO notification handled by the installer. Smaller and faster than any roof job — no scaffold.
Garden solar yields, without the brochure gloss
A south-facing array at 35 degrees in the English Midlands produces around 950 kilowatt-hours per year per kilowatt installed — more on the south coast, less in northern Scotland, and a ground mount's perfect angle plus cooler running typically beats the same panels on a compromised roof by a tenth or more. A PD-sized 1.8kWp garden array therefore delivers roughly 1,600–1,800kWh a year. Used directly in the house, that offsets electricity bought at 24–28p per kWh; exported, it earns a Smart Export Guarantee rate of 4–15p depending on supplier. The difference between those two numbers is why batteries and habit changes — running the dishwasher at noon — move garden solar economics more than any panel brand choice.
Seasonality is the part to internalise before buying: December output is about a fifth of June's. Garden arrays accept this gracefully when grid-tied (the grid absorbs the swing), but off-grid garden projects — a garden office, a lighting system — must be sized on the winter floor, not the summer ceiling. Worked numbers for both cases continue in the blog, including a piece on what shade really costs.
What people ask before going garden-solar
Five of the questions we answer most. The full set lives on the FAQs page.
Can I put solar panels in my garden instead of on my roof?
Yes, and for many homes it is the better engineering choice. A ground-mounted or garden-structure array can face due south at the ideal 35-degree pitch regardless of how your house is oriented, stays cooler than roof panels (which improves output), and is cleaned and inspected from a stepladder rather than scaffolding. The trade-offs are garden space and planning limits: stand-alone arrays only enjoy permitted development rights up to 9 square metres in England — about four panels — beyond which you apply for planning permission.
Do garden solar panels need planning permission?
Small ones often don't; large ones usually do. In England a stand-alone garden array is often permitted development if it is the property's first, stands under 4 metres tall, sits at least 5 metres from the boundary, and stays within 9 square metres of panel area — with listed buildings and conservation areas treated more strictly. Panels on a garden building roof follow outbuilding rules instead. These are summaries, not advice: confirm with your Local Planning Authority before ordering hardware.
How much do garden solar panels cost in 2026?
A 9m² permitted-development ground array (about 1.8kWp) costs £2,200–£3,500 professionally installed, benefiting from 0% VAT until March 2027. Larger consented arrays run £1,100–£1,400 per kWp. A solar pergola or canopy adds structure costs — £4,000–£10,000 all-in is typical. Small 12V systems powering lighting or a water feature start under £200 DIY. The costs page itemises each route.
Will panels in a garden get enough sun in the UK?
A well-sited garden array outperforms most roofs. South-facing at 35 degrees, UK panels yield roughly 850–1,050kWh per kWp per year depending on region. The genuine garden-specific risk is shading: a fence line, hedge, or neighbouring tree that shades the array for even an hour around midday costs disproportionate output. Watch the proposed spot across a sunny day — or use a sun-path app — before fixing anything to the ground.
Can a garden array power the whole house?
A 9m² PD-limited array supplies roughly 1,500–1,800kWh a year — between a third and half of a typical home's consumption, used directly or exported under the Smart Export Guarantee. Powering most of a home needs 3.5–5kWp, which in a garden means planning permission and around 20–28m² of ground. Many households land on a hybrid: PD-sized ground array plus whatever the roof can take.