Ground mounted solar panels are solar PV panels fixed to a freestanding frame on your land rather than on your roof. They usually cost around 15–35% more than an equivalent roof system, but they can be angled and positioned for close to maximum output, which makes them a strong option when a roof is shaded, poorly orientated, too small or off-limits. At most homes in England a small array under 9 square metres can go in without planning permission; anything bigger normally needs an application.
Below we cover when a ground array beats a roof, the planning rules (including England’s 27 August 2026 changes), real costs and how installation works.
What are ground mounted solar panels?
A ground-mounted (or freestanding) solar array uses exactly the same panels, inverter and wiring as a rooftop system. The difference is the structure: instead of roof hooks and rails, the panels sit on an aluminium or galvanised steel frame anchored into the ground. Power is carried back to the house, barn or business premises through an armoured cable in a buried trench, where it connects to the inverter and your consumer unit.
There are three common designs:
- Fixed-tilt rack mounts – the most common type for homes, farms and businesses. Rows of panels sit on a sloping frame, typically set to around 30–40 degrees and facing south.
- Ballasted frames – held down by concrete blocks or weighted trays rather than foundations. Useful where you cannot dig, such as over services, on hardstanding or on archaeologically sensitive land.
- Pole mounts and trackers – panels on a single post, sometimes on a motorised tracker that follows the sun. They take up less ground and can generate more, but they cost considerably more and have moving parts to maintain.
The anchoring method (ground screws, piles, concrete pads or ballast) depends on the ground conditions found at survey.
When do ground mounted solar panels beat a roof system?
For most homes, a well-orientated roof is still the cheapest place for solar. A ground mount starts to make sense in these situations:
Your roof is shaded
Trees, chimneys, neighbouring buildings or a hill can cut a roof system’s output badly, especially in winter when the sun is low. If there is an open, unshaded patch of land away from the house, a ground array can often generate far more from the same number of panels.
Your roof faces the wrong way or is too small
East and west roofs typically produce around 15–20% less than a south-facing one, and a north-facing roof is rarely worth covering. Small roofs, dormers, hips and rooflights also limit how many panels fit. A ground mount lets you face due south at the ideal tilt with as many panels as your land and budget allow.
Your roof is in poor condition or unsuitable
If the roof needs replacing within the panels’ 25–30 year life, you would pay to remove and refit them later. Thatch, fragile slate, asbestos cement farm roofs and weak structures also point towards the ground.
The building is listed or in a sensitive area
Listed building consent for roof panels is often refused where the roof is a prominent part of the building’s character. A discreet ground array elsewhere on the land can be an easier route, although it still needs planning permission because permitted development rights do not apply within the curtilage of a listed building. Our guide to solar panels on listed buildings covers the consent process in more detail.
You need more generation than the roof can provide
Farms, equestrian yards, rural businesses and larger homes with heat pumps, electric vehicles or pools often use far more than the typical UK household. A ground array can be sized to match that demand in a way a single roof cannot.
Ground mounted vs roof mounted solar: side-by-side
| Factor | Ground mounted | Roof mounted |
|---|---|---|
| Installed cost | Typically 15–35% higher for the same size | Lowest cost per kWp in most cases |
| Orientation and tilt | Chosen freely, usually due south at around 30–40 degrees | Fixed by the roof |
| Output per panel | Close to the maximum for the site, plus better cooling | Depends on roof direction, pitch and shading |
| Planning permission | Usually needed above 9 square metres of panels | Usually permitted development for homes |
| Space | Uses land, plus room for row spacing and access | Uses no extra land |
| Maintenance access | Easy, no scaffolding needed | Needs scaffold or access equipment |
| Expansion later | Straightforward if land and grid capacity allow | Limited by roof area |
| Security and damage risk | More exposed to theft, livestock and mowers; may need fencing | Out of reach |
Do ground mounted solar panels need planning permission?
The short answer: small domestic arrays can be permitted development, but most useful-sized ground arrays need planning permission. The rules below apply to England. Wales, Scotland and Northern Ireland have their own versions, so check with your local planning authority if you live outside England.
Permitted development for homes in England (from 27 August 2026)
Stand-alone solar in the garden or grounds of a house falls under Part 14, Class B of the General Permitted Development Order. The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2026 changed these rules from 27 August 2026, with a 12-month transition to 27 August 2027 during which either the old or new rules can be used. Under the current rules, a ground array at a house is permitted development only if:
- it is the first stand-alone solar installation on the property – any further array needs planning permission;
- the surface area of the panels is no more than 9 square metres, and no dimension of the array is more than 3 metres;
- its height does not exceed 4 metres in most cases, 2 metres if it is within 5 metres of the boundary or in a conservation area, and 1 metre if it is within 5 metres of the boundary and in front of the house’s principal elevation;
- it is not within the curtilage of a listed building or on a scheduled monument;
- it is sited, as far as practicable, to minimise its effect on the amenity of the area, and removed when no longer needed.
The biggest change for homeowners is the boundary rule. Previously, a domestic ground array had to be at least 5 metres from the boundary. It can now be closer, provided it stays within the lower height limits above.
Conservation areas, National Parks and other protected land
Protected land (known as article 2(3) land) includes conservation areas, National Parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites. In a conservation area, you must apply to the council for prior approval of the array’s appearance if it would be nearer to a highway than the house. On any article 2(3) land, prior approval is also needed if the array would be within 5 metres of the boundary. In a World Heritage Site, arrays within 5 metres of the boundary or nearer the highway than the house are not permitted development at all.
You can read the official summary on the Planning Portal and the amending legislation on legislation.gov.uk.
What 9 square metres actually means
This is where many online guides stop, and it is the most important practical point. A modern 430–450W domestic panel is roughly 1.7 metres by 1.1 metres, or about 1.9 square metres. Combined with the 3 metre dimension limit, the permitted development allowance usually fits somewhere between two and four panels – roughly 1 to 2 kWp. That is useful for a garden office or to top up a small roof system, but a typical 4 kWp home system needs around ten panels. In practice, most worthwhile domestic ground arrays need a householder planning application.
That is less daunting than it sounds. Well-sited, well-screened arrays are frequently approved, and the councils’ target for householder decisions is eight weeks. The householder application fee in England rose to £528 in April 2025 and is now index-linked each year. A good installer will provide the layout drawings, elevations and product details the application needs.
Farms and non-domestic land
Stand-alone solar at non-domestic premises falls under Part 14, Class K. The limits are similar – one array, 9 square metres of panels, no dimension over 3 metres, no higher than 4 metres, and at least 5 metres from the boundary of the curtilage. The August 2026 changes did not alter Class K. Any farm or commercial ground array of meaningful size therefore needs full planning permission, and the council will look at landscape and visual impact, glint and glare, ecology, drainage, access during construction and, on farmland, agricultural land quality.
At the very large end, solar farms above 100 MW in England are now classed as Nationally Significant Infrastructure Projects (the threshold rose from 50 MW on 31 December 2025). Everything below that goes through the local council.
How much do ground mounted solar panels cost?
The Energy Saving Trust puts a typical 4.5 kWp roof system at around £7,600. Ground-mounted systems cost more because of the frame, the foundations, the trench and the extra cable, plus planning and design time. Industry sources put the premium at roughly 15–35%, depending on the site. The table below gives typical 2026 ranges for a fully installed system by an MCS installer, before any battery.
| System size | Typical use | Roof mounted (typical) | Ground mounted (typical) |
|---|---|---|---|
| 1–2 kWp (2–4 panels) | Permitted development array, garden office top-up | £3,000–£5,000 | £3,500–£6,000 |
| 4–5 kWp (10–12 panels) | Typical home | £6,500–£8,500 | £8,000–£12,000 |
| 6–8 kWp (14–18 panels) | Larger home, EV or heat pump | £8,500–£12,000 | £11,000–£17,000 |
| 10 kWp (22–24 panels) | Large home, small holding | £12,000–£17,000 | £15,000–£27,000 |
| 20–30 kWp | Farm, equestrian or small business | Varies with building | Quoted per site (see our farm solar page) |
These are guide ranges drawn from published UK figures, not quotes. The site-specific items below drive most of the variation.
What drives the cost of a ground mount
| Cost item | Typical range | What pushes it up |
|---|---|---|
| Mounting frame | Around £700–£2,000 for a domestic array | More rows, steeper tilt, higher wind exposure, trackers |
| Foundations and groundworks | A few hundred pounds to several thousand | Soft or rocky ground, slopes, concrete instead of ground screws, poor access for machinery |
| Trenching | Around £30–£50 per metre; roughly £1,500 for a 10–15 metre garden run | Long runs across paddocks, crossing driveways or hardstanding, reinstating lawns and paving |
| Armoured cable | Rises steeply with length | Longer runs need thicker cable to keep voltage drop in check |
| Planning | £528 householder fee (England, 2025, index-linked) plus drawings | Heritage statements, ecology or landscape reports on sensitive or larger sites |
| Grid connection | Often nil for small systems | G99 studies, export limits, or supply upgrades on larger systems |
| Security | Optional | Fencing, anti-theft fixings or livestock protection in fields |
VAT on ground mounted solar
Solar panels installed at homes currently carry 0% VAT until 31 March 2027, after which the rate is due to return to 5%. HMRC’s guidance defines qualifying solar panels as systems installed “in, or on the site of” a building, so a ground array in the grounds of your home can qualify when it is supplied and installed together. Farm and commercial installations are standard-rated. See our 0% VAT on solar panels guide and HMRC’s VAT Notice 708/6.
Output advantages: why a ground array can out-generate a roof
The extra cost of a ground mount buys you control over the three things that matter most for output.
Optimal tilt and orientation
In the UK, a fixed array generates most over the year when it faces due south at roughly 30–40 degrees, with the southern counties at the lower end of that range. South-east and south-west still achieve around 95–98% of the south-facing figure, but east- or west-facing roofs typically lose around 15–20%. On the ground, you simply set the frame to the ideal angle. Converting an east-west roof layout into a south-facing ground array can therefore add a meaningful chunk of generation from the same panels.
Better cooling
Solar panels become less efficient as they heat up. Panels on a ground frame have air moving freely around both faces, so on hot summer days they run cooler than panels tucked tight against roof tiles, and output holds up better.
Room to avoid shading
You can position the array away from trees and buildings, and design the row spacing so one row does not shade the next when the winter sun is low.
Bifacial panels
Bifacial panels generate from the rear face as well as the front, using light reflected from the ground. They suit ground mounts far better than roofs because the rear face is exposed. The gain in UK conditions is modest over grass – Spirit Energy reports around 4% – rising to around 8% over pale gravel or white stone. They are worth considering on a new ground array, provided the frame is raised high enough to let light reach the rear face.
Ground mounted solar panels for farms and commercial sites
Ground arrays are common on farms because the land is available, the demand is high and many agricultural roofs are unsuitable. Dairy units, cold stores, grain drying, workshops and farm shops use a lot of daytime electricity, exactly when solar generates, and every unit used on site is worth far more than a unit exported.
Things to plan for on agricultural and commercial land:
- Site selection – lower-grade or awkward corners of land, field margins and areas near the existing supply keep costs and planning objections down. Grazing sheep under raised arrays (sometimes called agrivoltaics) can keep the land in agricultural use.
- Livestock and machinery – cattle and horses will rub against and damage frames, so arrays in fields usually need stock fencing. Protected cable routes matter where vehicles cross.
- Three-phase supply – larger systems generally need a three-phase connection to export and to balance the load.
We install ground-mounted arrays where roof space or orientation is limited, alongside roof systems on barns and commercial buildings. You can read more on our farm solar panels and commercial solar pages.
Grid connection and DNO approval
Every grid-connected system has to be notified to, or approved by, your Distribution Network Operator (DNO). There are two routes under the Energy Networks Association standards:
- G98 – for systems up to 16A per phase, which is about 3.68 kW of inverter capacity on a single-phase supply. The installer connects and then notifies the DNO within 28 days.
- G99 – for anything larger. The DNO must approve the connection before installation. It has up to 45 working days to respond to a low-voltage application, and in practice approval often takes 8–16 weeks, or longer in areas with network constraints.
Many domestic ground arrays exceed 3.68 kW, especially once a battery is added, so a G99 application is common. Sometimes the DNO will approve the system only with an export limit, which caps what you can send to the grid. That is not necessarily a problem if most of the power is used on site or stored in a home battery. For large farm and commercial arrays, the DNO may require network reinforcement, which can add significant cost and delay. It is worth asking about this early, before paying for detailed planning work.
How a ground mounted solar installation works, step by step
- Site survey – we check the land for shading throughout the year, ground conditions, access, buried services and the cable route to your consumer unit or distribution board. We also look at your electricity use.
- Design – panel layout, tilt, row spacing, frame and foundation type, cable sizing for the run length, inverter and any battery. You get an output estimate based on MCS methodology.
- Planning and DNO – we confirm whether the array is permitted development, then prepare the planning application or prior approval if needed, and submit the G98 or G99 application.
- Groundworks – ground screws or piles are installed, or pads are poured, and the trench is dug. Armoured cable is laid in the trench, typically at around 600mm deep and deeper under driveways, with warning tape above it, before the trench is backfilled and reinstated.
- Frame and panels – the mounting structure is assembled, levelled and set to the design tilt, then the panels are fitted and wired.
- Electrical connection – the inverter, isolators, protection and earthing are installed and connected to your supply, with a battery if chosen.
- Commissioning and handover – the system is tested and commissioned, you receive the electrical certification and MCS certificate, and the DNO is notified. You can then apply for the Smart Export Guarantee to be paid for exported electricity.
On-site work for a domestic array usually takes a few days; planning and DNO approval, where needed, set the overall timescale.
Disadvantages of ground mounted solar
A fair guide should be clear about the drawbacks:
- Higher cost than the same size roof system.
- Planning is needed beyond a few panels, adding time and cost.
- Land take – a 4 kWp array with spacing and access can use 25–40 square metres or more.
- Exposure to theft, livestock, mowers and footballs, and grass must be kept down so it does not shade the lower edge.
- Visual impact – neighbours may comment on a planning application.
If your roof is south-facing, unshaded and in good condition, a roof system is normally the better-value choice. Our solar panel installation page covers both options.
Frequently asked questions
Do ground mounted solar panels need planning permission?
Not always. In England, one stand-alone array at a house is permitted development if the panels total no more than 9 square metres, no dimension exceeds 3 metres, and it stays within the height limits: 4 metres generally, 2 metres within 5 metres of the boundary or in a conservation area. It is not permitted development within the curtilage of a listed building. In practice, most arrays large enough to power a home need planning permission.
How much do ground mounted solar panels cost in the UK?
A typical 4–5 kWp domestic ground-mounted system usually costs around £8,000–£12,000 installed, compared with roughly £6,500–£8,500 on a roof. Larger 10 kWp systems typically cost £15,000–£27,000. Trenching distance, ground conditions and planning are the biggest variables.
Are ground mounted solar panels worth it?
They are worth it when your roof is shaded, poorly orientated, too small, in poor condition or restricted by listing, and you have an open, sunny patch of land. They are also worth it when you use a lot of electricity, such as on a farm or with an EV and heat pump. If you have a good south-facing roof, a roof system is usually better value.
What are the disadvantages of ground mounted solar panels?
The main disadvantages are a higher installed cost (typically 15–35% more than a roof system), the likely need for planning permission, the garden or field space they take up, and greater exposure to theft, damage and vegetation shading.
Can I install ground mounted solar panels myself?
You can build a frame and dig a trench yourself, but the electrical connection to your home must be done by a qualified electrician. It must also be notified to the DNO. The 0% VAT rate only applies when the panels are supplied and installed together, and Smart Export Guarantee payments require an MCS certified installation.
How far from the house can ground mounted solar panels be?
There is no fixed legal maximum. Runs of 10–30 metres are common, and 50 metres or more is possible. Longer runs need thicker armoured cable to limit voltage drop, and trenching costs rise with every metre, so a site closer to the house is usually cheaper.
Can you put solar panels in your garden without planning permission?
Yes, if the array meets the permitted development limits. In England, that means one array with panels of no more than 9 square metres, no dimension over 3 metres, within the height limits, and not at a listed building. This usually allows roughly two to four modern panels.
Do ground mounted solar panels qualify for 0% VAT and the Smart Export Guarantee?
Yes, at homes. HMRC’s zero rate covers solar panels installed in or on the site of residential buildings until 31 March 2027, when supplied and installed together. Any MCS certified system can also apply for the Smart Export Guarantee. Farm and commercial installations pay standard-rate VAT.
Thinking about a ground mounted solar array?
Every ground mount is a site-specific project, and the numbers depend on your land, your cable route, your planning position and your grid connection. As an MCS certified installer with directly employed electricians, we survey the site, design the array, handle the planning and DNO paperwork and install the whole system. We cover Sussex, Surrey and neighbouring counties. If you are weighing up ground versus roof, book a free survey and we will give you an honest recommendation, with output estimates and costs for each option.
