Ground-Mounted Solar Panels UK

Ground-mounted solar panels sit on a frame in your garden instead of on your roof, and the Energy Saving Trust confirms they are a perfectly good option if you have unshaded, south-facing space. Two things separate them from a roof install: the cost is harder to predict, and the permitted development allowance is small. In England and Wales you get 9 square metres of panel without planning permission, which is roughly four modern panels. A full-size array usually means a planning application.

Most pages on this subject either pretend a ground-mounted system is priced like a roof system or skip the planning rules entirely. Neither helps you. Everything below was verified on 17 August 2026 against the Energy Saving Trust, the planning legislation for all four UK nations, the Energy Networks Association and Ofgem.

What counts as a ground-mounted solar system

A ground-mounted (or stand-alone, or free-standing) solar system is one that is not fixed to a building. The panels sit on a metal frame that is either driven, screwed or ballasted into the ground, angled and oriented however the installer chooses. The electricity runs back to your consumer unit through a buried cable, usually via an inverter. The planning legislation calls these systems "stand-alone solar" in England, Wales and Northern Ireland, and "free-standing solar" in Scotland, and treats them under different rules from panels on a roof.

The obvious appeal is siting. A roof gives you whatever orientation and pitch the builder left you. A frame in the garden can face due south at the ideal angle, which matters because the Energy Saving Trust says an east or west facing system "tends to get around 15-20% less energy than one facing directly south". If your roof faces the wrong way, is shaded, or is not strong enough, the garden may simply be a better site. Our guide to which direction solar panels should face covers the orientation maths in full.

What ground-mounted solar panels cost

No UK authority publishes a typical installed price for a domestic ground-mounted system, and the Energy Saving Trust says directly that the cost "is more difficult to predict" than a roof install. The two variables it names are "the type of mounting frame" and "how far away it is from your house". We are not going to invent a figure it declines to publish.

What you can do is anchor to the roof benchmark and reason about the differences. The Energy Saving Trust puts a typical roof-mounted home system at around 4.5 kilowatt peak (kWp), costing around £7,600, using around 12 panels. Against that benchmark, a ground-mounted version of the same system changes the bill in both directions:

• The frame and groundworks are extra. A roof already exists; a ground mount has to be built, and depending on the ground that can mean concrete foundations or driven posts.
• The cable run is extra, and it grows with distance. The trench from the array to your consumer unit is dug, cabled and reinstated at your expense, which is why the Energy Saving Trust lists distance from the house as a cost variable.
• Scaffolding is not needed. There is no working at height, which removes one of the standard cost lines on a roof installation.
• An outbuilding without power adds cost. If the panels go on or beside a shed or garage with no electricity supply, the Energy Saving Trust warns you should "factor this in when looking at the total cost of the system".

Because the frame, the ground conditions and the cable run vary so much between homes, quotes for the same array can legitimately differ more than roof quotes do. That makes comparing several itemised quotes more important, not less. Our full guide to solar panel costs in the UK sets out the roof benchmark in detail, and our cost by system size guide shows how the numbers scale.

The 9 square metre problem: planning rules nation by nation

Every UK nation allows a small stand-alone solar array as permitted development, and every UK nation caps it well below the size of a typical home system. Here is the arithmetic, and it is ours rather than any official body's: the Energy Saving Trust's typical 4.5kWp system uses around 12 panels, and a modern domestic panel is roughly 2 square metres. The 9 square metre cap in England and Wales therefore buys you about four panels, in the region of 1.6 to 1.8 kWp at current panel wattages. Northern Ireland's 14 square metres is about seven panels. If you want the full 12-panel system in your garden, in most of the UK you should expect to apply for planning permission.

The nation-by-nation rules below are for ordinary houses. Panels on your roof are a separate, more generous regime, covered in our guide to permitted development for solar panels.

England

Stand-alone solar is Class B of Part 14 of the General Permitted Development Order. Development is not permitted if the installation would result in more than one stand-alone solar within the curtilage; if any part "would exceed 4 metres in height"; if it "would be installed within 5 metres of the boundary of the curtilage"; if it would be within the curtilage of a listed building or on a scheduled monument; or if "the surface area of the solar panels forming part of the stand-alone solar would exceed 9 square metres or any dimension of its array (including any housing) would exceed 3 metres".

Conservation areas get two extra rules. The height limit drops to 2 metres where the array would sit nearer to a bounding highway than the house itself, and an array in that position also triggers a condition: before starting work you must apply to the local planning authority for a determination as to whether prior approval is required for the impact of its appearance on the character of the conservation area. In a World Heritage Site an array nearer the highway than the house is not permitted development at all. Source: GPDO 2015, Schedule 2, Part 14, Class B, as amended.

Wales

The Welsh Government's rules allow one standalone panel as permitted development provided no part exceeds 4 metres in height, it is not within 5 metres of the highway, no dimension is greater than 3 metres, and "the panel surface shall not be more than 9 square metres". Wales handles boundaries differently from England: instead of banning the array within 5 metres of the boundary outright, it caps it at 2 metres in height inside that zone. When the panels are no longer needed for microgeneration they should be removed. Source: gov.wales, planning permission: solar panels.

Scotland

Free-standing solar within the curtilage of a house falls under Class 3B, the general class for garden structures, per the Scottish Government's Circular 1/2024. There is no square-metre cap on the panels themselves, but the resulting structure must be "not higher than 3 metres", it cannot be forward of a wall forming part of the principal elevation (or a side elevation fronting a road), and the development plus any existing structures cannot cover more than half of the relevant curtilage. Class 3B rights do not apply in conservation areas or within the curtilage of a listed building at all. On uneven ground, height "should be measured from the lowest point immediately adjacent to the development". Source: Planning Circular 1/2024, Class 3B.

Northern Ireland

Class C of the Planning (General Permitted Development) Order (Northern Ireland) 2015 permits one stand-alone solar of up to 14 square metres, the most generous area cap in the UK, but with a lower height limit: development is not permitted if "any part of the stand alone solar would exceed 2 metres in height", or if it would sit nearer to a road which bounds the curtilage than the nearest part of the house. Within the curtilage of a listed building, listed building consent is needed first. Source: Planning (GPD) Order (NI) 2015, Schedule, Part 2, Class C.

Two practical points cut across all four nations. First, permitted development rights can be removed from an individual property by planning condition or an Article 4 direction, so check with your council before assuming any of the above applies to your house. Second, these caps are per curtilage, not per application: one array is the limit everywhere, so you cannot chain multiple 9 square metre frames across the lawn.

How far from the house can the panels be?

Planning law does not set a maximum distance from the house; the practical limits are your own boundary and the cost of the cable run. The permitted development rules above require the array to be inside your property's curtilage, away from boundaries (5 metres in England, with a height penalty inside 5 metres in Wales) and, in several nations, no closer to the road than the house. Beyond that, the law does not care whether the frame is 5 metres from your back door or 50.

Your budget will care. The Energy Saving Trust names distance from the house as one of the two variables that make ground-mounted costs hard to predict, because every extra metre is more trench, more cable and more labour, and on long runs the installer may need heavier cable to keep electrical losses acceptable. A competent MCS installer sizes the cable for the run as part of the design. When you compare quotes for a ground-mounted system, the cable run is one of the lines most worth reading.

Grid connection and getting paid: the rules are the same as a roof

The electricity network does not distinguish between panels on a roof and panels on a frame. The Energy Networks Association's thresholds apply to the system's output, not its mounting: up to 3.68kW per phase (16 amps) the install falls under G98 and your installer connects first and notifies your network operator within 28 days; above that it is G99 and needs approval before connection. The threshold counts the total aggregated output of all generators on the property, so a garden array added to an existing roof array or battery can tip a home into G99 territory. Our G98 and G99 guide explains the paperwork, which your installer normally handles. In Northern Ireland the installer registers the system with NIE Networks instead.

Export payments work the same way too. The Smart Export Guarantee requires the technology and installer to be "certified under the Microgeneration Certification Scheme (MCS) or equivalent", plus a smart meter that records exports, and it applies in England, Scotland and Wales but not Northern Ireland. A ground-mounted system installed by an MCS-certified installer qualifies exactly as a roof system does. Rates are set by suppliers rather than the government; the Energy Saving Trust says a typical rate is around 12p per unit, while electricity you avoid buying is currently worth 26.11p per kWh under the July to September 2026 price cap, which is why using your own generation beats exporting it. Our guide to current SEG rates compares what suppliers are actually paying.

Ground mount or roof: which is the better site?

If your roof is unshaded and faces somewhere between south-east and south-west, the roof usually wins on cost and simplicity. The garden wins when the roof is the problem.

• The garden wins on orientation and tilt. The frame is set to whatever angle and direction the installer wants, rather than whatever your roof happens to be.
• The garden wins on access. The Energy Saving Trust notes that a ground-mounted array is easy to keep clean, with no ladders or roof access involved, and there is no question about whether your roof structure can take the load.
• The roof wins on planning. A roof array on a house is permitted development across most of the UK at full system size; a garden array above 9 square metres in England and Wales generally is not.
• The roof wins on predictability of cost. No frame, no trench, no groundworks.
• The garden loses space. A 12-panel array plus room to avoid shading is a real commitment of lawn, and it cannot be forward of the house in most nations.
• Ground level brings its own maintenance. The Energy Saving Trust warns that debris "is more likely to build up if you have ground-mounted panels" and that you need to be more careful about rodents and physical damage. Rain still does most of the cleaning if the panels are tilted at 15 degrees or more.

The economics underneath are the ones that apply to any solar install: the panels should last 25 years or more, the inverter needs replacing after around 12, and payback on a typical roof system runs at roughly 9 to 12 years depending on where you live and how much of the output you use yourself. Our guides to whether solar panels are worth it and how long solar panels last work through those numbers, and how many panels you need covers sizing the system to your usage before you decide where to put it.

Ground-mounted solar panels: frequently asked questions

Figures and quotations on this page were verified on 17 August 2026 against the Energy Saving Trust solar panels and Smart Export Guarantee guidance (pages updated 13 August 2026 and 20 May 2026), the General Permitted Development Order 2015 Schedule 2 Part 14 as amended (legislation.gov.uk), gov.wales planning guidance, Planning Circular 1/2024 (gov.scot), the Planning (GPD) Order (Northern Ireland) 2015, the Energy Networks Association and the Ofgem price cap for 1 July to 30 September 2026. Planning rules and prices change, and permitted development rights can be removed from individual properties. Check the linked primary sources and your local planning authority before making a decision.