Selling a house with solar panels (UK): the conveyancing guide

Selling a house with owned, properly documented solar panels generally helps a UK sale rather than hinders it: buyers increasingly want the lower running costs, and a well-installed system is a visible plus. The friction, when it happens, is almost always about paperwork or a lease. A buyer's solicitor will typically ask for your MCS certificate, the DNO G98/G99 notification, any Smart Export Guarantee (SEG) contract and the warranties, and an old "rent-a-roof" lease (where a company owns the panels on your roof) is the one thing that can genuinely slow things down.

This guide is about the selling process, not whether solar adds to your asking price. If you want the value question, owned versus leased, buyer appeal, and what the evidence supports, that's a distinct topic in do solar panels increase your house value?. Here we focus on getting the transaction through cleanly: the documents, the SEG transfer, the MCS certificate, and the lease trap.

Does solar help or hinder a sale?

Short, honest answer: an owned system with its paperwork in order is an asset. Through estate-agent commentary, solar has become a more visible selling point as energy bills have risen, and buyers increasingly ask about running costs, not just purchase price. What turns solar from a plus into a problem is almost never the panels themselves. It's one of two things:

• Missing documentation, which forces the buyer's solicitor to raise enquiries and can delay exchange.
• A leased or rent-a-roof arrangement, where the panels aren't yours to sell, covered in its own section below.

Get ahead of both and solar is a smooth part of the sale. Ignore them until the solicitors are involved and they become last-minute friction. The rest of this guide is how to get ahead of them.

The document pack solicitors ask for

Buyers' solicitors run standard enquiries on any solar installation during conveyancing. Assemble this pack early, ideally before you list, so you're not hunting for it under time pressure:

Document	What it proves	Where to get it
MCS Installation Certificate	The system was installed to the recognised UK standard	Your installer, or the MCS certificate database
Electrical Installation Certificate	The electrical work meets wiring regulations	Your installer / electrician
DNO notification (G98 or G99)	The system was properly registered with your local network operator	Your installer or DNO
Smart Export Guarantee contract	Terms of any export payments and who they're with	Your SEG supplier
Warranties (panels, inverter, battery, workmanship)	The system is still covered and by whom	Your installer / manufacturers
Building Regulations / structural sign-off (where relevant)	The install was compliant	Your installer or local authority

You don't strictly have to have every document to sell, but each missing item is a question a solicitor can raise, and unanswered questions are what delay a transaction. A complete pack lets the sale move without solar becoming a talking point.

The MCS certificate: find this one first

If you chase down one document before all others, make it the MCS Installation Certificate. It's the one lenders and conveyancers most often expect to see, it's what confirms the system was professionally installed to standard, and it's required to register for (and transfer) a Smart Export Guarantee tariff. Without it, a buyer's solicitor may raise enquiries and some lenders get cautious.

If you can't find yours, you can usually request a copy from the installer who fitted the system, noting that they may charge a small fee, or retrieve it via the MCS certificate database. Do this early: recovering a certificate from an installer (or an installer who's since closed) can take time you won't have once a buyer is waiting. If your installer has gone out of business, our guide on what if my solar installer goes bust? covers where the paperwork and warranty cover then sit. More on the accreditations themselves in MCS, RECC and HIES explained.

Transferring the Smart Export Guarantee contract

If your system exports surplus electricity under the Smart Export Guarantee, that contract needs handling at the sale. The key points:

• The SEG contract is generally transferable, but it doesn't move automatically with the house.
• In practice the outgoing owner closes their SEG account and the new owner sets up their own SEG arrangement, which they're free to do with any SEG supplier (not necessarily the same one). This is where the buyer benefits from being able to shop around for the best export rate.
• The MCS certificate is needed to register or re-register for SEG, which is another reason to have it ready.

Be straight with the buyer that the export income is available to them once they set up their own SEG tariff, rather than promising a specific figure that transfers intact. Export rates vary by supplier and change over time, as we cover in will SEG export rates fall?. Framing it as "an income the buyer can set up, with the paperwork ready to make it easy" is both accurate and appealing.

The rent-a-roof / lease complication

This is the big one, and it's worth taking seriously because it's the single most common way solar genuinely stalls a UK sale.

During the Feed-in Tariff era (roughly 2010–2016), some homeowners took a "rent-a-roof" (free solar) deal: a company installed panels at no cost in exchange for keeping the Feed-in Tariff income and holding a lease on your roof, often for 20–25 years. If that's your situation, the panels on your roof are not yours to sell, and the lease becomes part of the transaction:

• The buyer's solicitor must review the lease, which takes time and raises enquiries.
• Some mortgage lenders are cautious about a lease on part of the property the homeowner doesn't own, and a few have specific requirements the lease must meet.
• The lease terms can outlast your ownership, becoming something the buyer inherits, so they'll want to understand exactly what they're taking on (access rights, the company's obligations, break clauses).

None of this makes a leased-solar home unsellable, but it does mean flagging it early. If you're not certain whether your system is owned or leased, check your original paperwork or contact the company that fitted it, and tell your estate agent and solicitor up front. If a lease is involved, ask the lease provider for their standard homeowner-sale / assignment pack at the start, because that's the document set the buyer's side will need. Sorting this before you list is the difference between a manageable step and a nasty surprise at the enquiries stage.

If documents are missing

Don't panic if the pack has gaps. It's usually recoverable, and it's better to fix it before listing than to discover it mid-sale:

• MCS certificate: request a copy from the installer, or via the MCS certificate database.
• DNO notification: your installer or your local Distribution Network Operator can usually confirm the registration.
• Warranties: manufacturers can often reissue or confirm cover against your system details; the installer holds the workmanship warranty.
• Installer gone bust: the paperwork and some warranty cover may sit elsewhere. See what if my solar installer goes bust?.

A house can be sold with imperfect paperwork, but every gap is a potential enquiry, and enquiries cost time. Recovering documents early keeps the sale on track.

A practical seller's checklist

Before you list a home with solar:

• Confirm whether the system is owned or leased, and if leased, get the provider's sale pack.
• Locate the MCS certificate (chase a copy now if it's missing).
• Gather the electrical certificate, DNO notification, SEG contract, and warranties into one pack.
• Note the system size, panel and inverter details, and any battery, so your agent can market it accurately.
• Have an honest line on export income: available to the buyer via their own SEG tariff, ready-to-transfer paperwork, no invented figure.

Do that, and solar is a straightforward, positive part of your sale. On the value side, whether it lifts your asking price and by how much, see do solar panels increase your house value?; and if you're on the buying side of a solar home, the same document pack is exactly what you should be asking the seller for.

Frequently asked questions

Does having solar panels make a house harder to sell?

Owned, well-documented panels generally help rather than hinder, because buyers increasingly want lower running costs. The two things that can slow a sale are missing paperwork and a rent-a-roof lease (where a company owns the panels on your roof). Get the document pack together early and flag any lease up front, and solar becomes a smooth, positive part of the transaction.

What documents do I need to sell a house with solar panels?

A buyer's solicitor will typically want the MCS Installation Certificate, the Electrical Installation Certificate, the DNO G98/G99 notification, any Smart Export Guarantee contract, and the warranties for the panels, inverter and any battery. Building regulations sign-off may also be relevant. You can sell without a complete set, but each missing item is a potential enquiry that can delay exchange, so assemble the pack before you list.

Can I transfer my Smart Export Guarantee to the buyer?

The SEG contract is generally transferable but doesn't move automatically with the house. In practice the seller closes their SEG account and the buyer sets up their own SEG tariff (with any SEG supplier they choose), using the MCS certificate to register. So the export income is available to the new owner once they arrange it, rather than passing across intact at a fixed rate.

What is a rent-a-roof solar lease and why does it complicate a sale?

Rent-a-roof (or free solar) deals from the Feed-in Tariff era saw a company install panels for free in exchange for keeping the tariff income and holding a lease on your roof, often for 20–25 years. Because the panels aren't yours, the buyer's solicitor must review the lease, some lenders are cautious about a lease on part of the property, and the terms can outlast your ownership. It's manageable, but flag it early and get the provider's sale pack at the start.

I've lost my MCS certificate. Can I still sell?

Yes, but sort it before listing. The MCS certificate is the document lenders and conveyancers most often expect, and it's needed to register for the Smart Export Guarantee. Request a copy from the installer who fitted the system (they may charge a small fee) or retrieve it via the MCS certificate database. If the installer has closed, our guide on installers going bust covers where the paperwork and warranty cover then sit.

Related

• Do solar panels increase your house value in the UK?
• Do solar panels affect your EPC rating?
• Smart Export Guarantee: how UK solar exports actually pay
• MCS, RECC and HIES explained
• What if my solar installer goes bust?
• Is my roof suitable for solar?