About solarpanelsforbarns.co.uk

An independent guide to barn solar — and only barns

Solar Panels for Barns is an independent information service operated by SEO Dons Ltd (Company No. 16766013), registered at 71–75 Shelton Street, Covent Garden, London WC2H 9JQ. It is a publisher, not an installer: nobody here fits panels, surveys roofs or holds an MCS, NICEIC, RECC or TrustMark registration. Every page on this site is about one thing — putting solar PV onto a barn roof, whether that roof spans a 300 kW poultry complex or a 6 kW converted stone barn — and the aim is to give you the sourced numbers, the planning route and the grid position before an installer's sales visit does.

To be straight about what this site is and is not: it does not install, quote or contract for works. When you ask for a feasibility summary or a quote, the details you send are passed to a suitable installer who can price the work, and this site may receive an introduction fee for that introduction. Every figure and rule quoted in the guides is drawn from the published cost, yield, tariff and planning references cited on the relevant page, and reviewed on the date shown in each page's byline.

Why the guide covers only barns

A barn is not a big house, and treating it like one is exactly how a barn solar project goes wrong. The building type is genuinely distinct, and the differences are the whole job:

• Permitted-development rights work differently. Rooftop PV on a working agricultural building is normally Permitted Development under Class J, Part 14 of the GPDO 2015 — no planning application — provided the panels sit within 0.2 m of the roof slope and at least 1 m in from the roof edge (an array over 50 kW also needs a prior-approval application to the council, on design and glare, before work starts). Knowing exactly where your barn sits within those rules is the first check a competent installer should make.
• Heritage and listed barns need a sensitive design, not a refusal. Stone, brick and timber-framed threshing barns, Dutch barns and field barns lose Permitted Development when they are listed (or stand in the curtilage of a listed building); a conservation area, National Park, AONB or the Broads alone does not remove the right to fit panels to a roof. Listing changes the consenting route — but with the right approach it rarely makes solar impossible.
• Asbestos-cement roofs are common on pre-2000 barns. They can't be drilled or loaded with panels, and only a licensed contractor may remove them under CAR 2012. The proven route is a combined strip-and-reclad to modern profiled steel, then PV on the new roof.
• Rural grids are capacity-constrained. A G99 application is required above 3.68 kW per phase, and rural DNO networks often need a connection study or an export-limited design. This is a defining feature of barn projects, not a footnote.
• Barns span hard commercial and domestic at once. A 24/7 poultry shed and a barn-conversion home are sized, costed, taxed and consented in completely different ways. One template cannot serve both.

Because the guide covers only barns, every one of these is treated as routine rather than as a footnote. You can see how each building type is handled — and how the numbers differ — across the barn types, from steel-frame portal sheds to traditional and listed barns.

How a barn solar project runs

This is the sequence a well-run barn project follows, and the order to expect from any installer you shortlist. The free desk feasibility summary this site offers covers the first step; the rest is the installer's job, and the guide tells you what good looks like at each stage.

• Desk feasibility. Half-hourly meter data (where a supply exists) and a photo of the roof are enough to model an indicative system size, generation and payback before anyone visits. For a working barn the system is sized to the actual load — a typical 180 kW broiler-shed array on two clear-span roofs is sized to the continuous ventilation, heating and lighting load, not to a one-size template. You should get an honest first picture for the cost of an email.
• Written proposal. When the desk study stacks up, the installer moves to a written proposal — sized to the roof and the load, with figures that match the relevant barn type rather than a headline guess. Sense-check the ranges yourself on the barn solar cost page before you sign anything.
• Structural appraisal. PV adds a modest dead load of roughly 10–15 kg/m² plus wind uplift, so a short structural appraisal confirms the purlins and frame can carry it. Modern steel portal frames almost always can; older or modified barns occasionally need minor strengthening, which should be priced in before any panels go up.
• Planning, LBC and grid. The barn's exact Permitted-Development position is confirmed first and, where a listed barn or designated area requires it, the Listed Building Consent or planning application and its supporting heritage statement are prepared — by the installer or a planning consultant. The G99 DNO application should go in alongside the survey to start that clock immediately: on rural networks the grid connection is usually the long pole.
• MCS-certified installation. The install itself should be carried out by an MCS-certified installer — suppliers ask for MCS (or an equivalent) on systems up to 50 kW before they will pay Smart Export Guarantee tariffs — with biosecurity and animal-welfare protocols followed in full on livestock and poultry units, and DSEAR and grain-dust precautions taken on operational grain stores.

When you're ready for tailored figures, the quickest route is to request a free desk feasibility summary.

Standards to hold an installer to

Barn solar should be installed to the same standards as any quality commercial or domestic system. This site holds none of the accreditations below — no publisher does — but the installer you appoint should, and each can be checked on the issuing body's register rather than taken on trust:

• MCS commercial and domestic certification — what SEG suppliers ask for on systems up to 50 kW, and the route to most product and workmanship warranties.
• NICEIC or another electrical competent-person scheme — electrical installation and inspection standards.
• RECC and TrustMark — consumer-protection and Government-endorsed quality frameworks.
• An insurance-backed workmanship warranty — an insurer stands behind the workmanship cover if the installer ceases trading; ask for the certificate.

Treat these as the bar to clear on every barn, from a single field barn to a multi-shed complex.

An honest answer either way

Not every barn is right for solar, and this guide says so. If a roof is the wrong pitch or orientation, if a fragile or asbestos roof would need a re-clad that doesn't make financial sense, if a low-load barn would export so much that the payback doesn't earn its keep, or if a grid constraint shrinks a scheme below the point of being worthwhile — that should be clear at the desk-feasibility stage, before you've spent anything. A straight "not yet" or "not this roof" is worth more than a system that disappoints. A barn roof is the best solar site on most rural properties, but only when the building, the planning and the grid all line up — and the point of this guide is to help you check that they do before anyone recommends a single panel.