Solar Panels and Buying or Selling a Home: What Buyers and Sellers Need to Know

Solar panels can add real value to a property — a 2024 study by Swansea University and the University of Birmingham, analysing over 1.5 million transactions, found that homes with solar PV sold for between 6.1% and 7.1% more than comparable properties without them. That is a typical premium of £14,000 to £16,000 on an average UK home. But the same panels can complicate a sale — sometimes significantly — if they are on a lease, if documentation is missing, or if the buyer's mortgage lender has concerns about the roof arrangement. This guide explains what buyers and sellers each need to know.

Owned panels vs leased panels — why it matters most

The single most important question when buying a home with solar panels is whether the panels are owned outright or subject to a roof-space lease. The answer changes almost everything that follows.

Between roughly 2010 and 2015, many thousands of UK homeowners accepted a free solar panel installation in exchange for a 25-year lease of their roof space to an energy company. The installer took the Feed-in Tariff payments; the homeowner got free electricity during daylight hours. These lease arrangements are now a well-known complication in the conveyancing process.

• Owned panels transfer with the property at completion. The buyer simply takes over ownership — along with any remaining manufacturer warranties and export tariff arrangements.
• Leased panels involve a third-party legal interest in the roof. The lease must be formally assigned to the buyer. This requires the solar company's consent and can add weeks to a transaction if the company is slow to respond or no longer exists.

Sellers can confirm ownership by checking the original installation contract or looking at whether any payments (such as Feed-in Tariff receipts) were made to a third party rather than to them.

Leased panels and mortgage lenders

Mortgage lenders take a cautious view of leased solar panels because the lease creates a third-party interest in the roof — part of the security they are lending against. The requirements are set out in clause 5.20 of the UK Finance Mortgage Lenders' Handbook. Lenders who use the Handbook will only consent to a new lease of roof space where a set of minimum requirements are met, and they require confirmation of compliance using the UK Finance template letter.

Key requirements that early leases frequently fail include:

• An unconditional right to break the lease in the event of repossession, to allow the lender to sell the property quickly.
• The lease must not prevent the borrower from complying with their mortgage conditions.
• Adequate buildings insurance arrangements for the panels must be documented.

If the existing lease does not meet these criteria, a deed of variation will be needed before exchange of contracts. Obtaining one requires negotiation with the solar company — which may charge a fee, may take several weeks, or (in cases where the original installer has gone bust and the lease was assigned to a portfolio owner) may be genuinely complex to arrange. Sellers should instruct their conveyancer at the point of marketing, not after a buyer is found, so that any lease compliance issues are identified and resolved as early as possible.

In Northern Ireland, the position is stricter: a lease of roof space is not acceptable to most lenders at all, and a lease of rights structure is required instead.

EPC ratings and what solar does to them

Solar PV improves a property's Energy Performance Certificate rating because it reduces dependence on grid electricity. According to the government's Standard Assessment Procedure (SAP) methodology, solar panels typically increase an EPC score by around 18 points on average — often enough to move a property up one or two bands.

This matters commercially: Rightmove data from 2023 found that moving an EPC rating from D to C increases property value by around 3% on average. An EPC of C or above is increasingly important to buyers, particularly as minimum EPC requirements for private rented property continue to tighten. For a buyer, a solar-equipped home with a B or C rating is a meaningful selling point — lower energy bills and a better starting position against future regulations.

For a full breakdown of how EPC bands translate to running costs and potential bill savings, see our guide to solar panel costs and savings.

The MCS certificate and why you need it

The Microgeneration Certification Scheme (MCS) certificate is the most important document in any solar panel property transaction. It is proof that the installation was designed, installed, and commissioned to recognised industry standards by a certified installer, using approved products.

You need it for three reasons when selling:

1. Export tariff transfer: Ofgem requires the buyer to provide the original MCS certificate number when registering as the new owner of a Smart Export Guarantee (SEG) or legacy Feed-in Tariff installation. Without it, the new owner cannot take over export payments.
2. Buyer due diligence: A buyer's solicitor will request the MCS certificate as part of standard conveyancing enquiries. A missing certificate is a red flag that can cause a buyer to reduce their offer or withdraw.
3. Warranty validity: Many manufacturer warranties (often 10–25 years for panels, 5–10 years for inverters) are conditional on MCS-certified installation. A missing certificate can invalidate warranty claims.

If you cannot locate your MCS certificate, contact your original installer first. If they are no longer trading, MCS maintains a public register at mcscertified.com where you can search for your installation by address. Some certificates may also be retrievable through Ofgem's Microgeneration database if your system was registered for FiT or SEG.

Documents a seller should assemble before marketing

Getting paperwork in order before you list your home avoids delays once a buyer is found. Your conveyancer will need:

• MCS installation certificate — confirms standards-compliant installation.
• Building regulations completion certificate — confirms local authority sign-off (required for systems installed since 2012 in most cases).
• NAPIT or NICEIC electrical installation certificate — for the DC and AC wiring.
• Manufacturer warranties — for panels, inverter, and mounting system.
• SEG or FiT agreement — the export tariff contract, so the buyer can take it over.
• System monitoring data — optional but reassuring to buyers; shows the system is performing as expected.
• Deed of covenant or lease documents — if the panels are leased.

If you are missing any of these, start tracking them down now. MCS certificates in particular can take several weeks to locate if the original installer has wound up. See our broader guide to solar system registration and grid notification for context on how installations are recorded.

Questions a buyer should ask

Before making an offer on a home with solar panels, ask the seller's agent — or raise through your solicitor — the following:

1. Are the panels owned outright or subject to a lease?
2. Can the seller provide the MCS certificate and building regulations approval?
3. Is there an active SEG or FiT arrangement, and what are the payment terms?
4. When was the system installed, and what inverter and panel brands were used?
5. Are there monitoring logs showing recent generation output?
6. Are the manufacturer warranties still in force, and are they transferable?

If the panels are leased and the answers to questions 2–6 are vague, factor time and potential cost into your offer. Your mortgage lender will want assurance that the lease meets UK Finance requirements, and if a deed of variation is needed, that cost typically falls on the seller but can slow a transaction by four to eight weeks.

Transferring the SEG or FiT at completion

If the property has an active Smart Export Guarantee contract, the buyer must notify the exporting energy supplier after completion. To register as the new owner, Ofgem requires the original MCS certificate number and EPC certificate number used by the previous owner. Sellers should include these in the completion paperwork as a matter of routine.

Legacy Feed-in Tariff arrangements (closed to new applicants in April 2019) transfer similarly, but the FiT licensee — usually the energy supplier — must also be notified. Payments do not automatically redirect; the buyer needs to register actively. Failure to do so means export payments continue to the previous owner's account until corrected, which is a minor but avoidable dispute.

Does solar add value? The honest picture

The 2024 Swansea University research is the most robust UK evidence to date: owned solar panels add approximately 6.1%–7.1% to sale price, based on 1.5 million transactions. Earlier, more conservative estimates from RICS put the premium at 0.9%–2%, and regional variation is significant — the premium is generally larger in areas with higher energy costs and stronger environmental buyer sentiment.

The key qualifier is owned. Leased panels in poor compliance with lender requirements can — and do — reduce buyer interest and slow transactions. If you are considering installing solar with the intention to sell in the near future, purchasing the system outright (rather than accepting a free lease) is strongly preferable. Our guide to solar panel costs in 2026 explains what a purchased system currently costs and how quickly it pays back.