Buying a House With Solar Panels UK

A house with solar panels can shave hundreds of pounds off annual energy bills and generate income through the Smart Export Guarantee. But the value of any system hinges on the paperwork behind it. Leased panels, missing certificates, or an unregistered installation can complicate your mortgage, affect your insurance, and turn an apparent asset into a source of legal headaches. Here are the eight checks to complete before you exchange.

1. Owned or leased — the most important question

Ask the seller directly: do they own the panels outright, or are they subject to a lease or rent-a-roof agreement? Between 2010 and 2019, solar companies offered homeowners free panel installations in exchange for a long-term lease of their roof space and the associated Feed-in Tariff payments. These leases typically ran for 25 years and are attached to the property, not the individual owner — meaning they transfer to you on completion.

Approximately 27,000 UK households signed up to rent-a-roof schemes during this period. While new schemes of this type closed when the Feed-in Tariff ended in 2019, many leases signed in the early 2010s will not expire until the mid-to-late 2030s. Your solicitor should search the title register at HM Land Registry to check for any legal charge or restriction relating to the panels. A leasehold interest over the roof space should show up in the title documents.

If a lease exists, check:

Who owns it and whether the company still trades
Whether the lease restricts alterations or requires the company's consent to sell
What happens at the end of the 25-year term (removal or ownership transfer)
Whether your mortgage lender will accept it (see check 7)

2. Request the MCS certificate

An MCS (Microgeneration Certification Scheme) certificate is the key installation document. It confirms the installer was MCS-accredited, the system was correctly specified, and the panels meet the performance standards required for regulatory compliance. You will need the MCS certificate number to register as the new SEG generator after completion.

Ask the seller or their solicitor to provide the original MCS installation certificate. If the installer has gone out of business, you can try the MCS online database to retrieve the record. The certificate does not expire and records the installation details permanently. If no MCS certificate exists and the seller cannot obtain a retrospective one, treat it as a significant red flag — the system may not have been installed to standard.

3. Check DNO registration (G98 or G99)

Every grid-connected solar installation in the UK must be notified to the local Distribution Network Operator (DNO). Systems up to 3.68 kW on a single-phase supply are registered under G98 (connect-and-notify); larger systems require prior approval under G99. The government's guidance makes clear that it is ultimately the homeowner's responsibility to ensure this notification was submitted.

Ask the seller for the G98 notification confirmation or G99 approval letter from their DNO. You can identify the relevant DNO by entering the property's postcode on the Energy Networks Association website. If no DNO notification was made, the new owner should regularise this after completion — an unregistered system could theoretically be ordered to disconnect.

4. Which SEG tariff is the system on?

If the system is currently earning export payments under the Smart Export Guarantee, those payments are linked to the seller's name — they do not transfer automatically. Once you complete, the seller's SEG tariff ends. As the new owner, you will need to apply to a SEG-licensed supplier in your own right to start receiving export payments.

The good news is that you can choose any SEG licensee — you are not locked to the previous owner's supplier. To apply, you will need the MCS certificate number and an in-home export meter or a smart meter capable of recording export. Check our guide on the best SEG rates to compare current tariffs before you apply.

Note: if the system is still on the older Feed-in Tariff (FiT), which closed to new applicants in April 2019, the position is different — existing FiT agreements can transfer to a new owner, but the process involves notifying Ofgem and your FiT licensee. Ask your solicitor to raise this specifically if the system predates 2019.

5. Panel and inverter age and remaining warranty

Solar panels typically carry a 25-year performance guarantee; inverters usually carry 5–12 years (some manufacturers now offer up to 20 years with extended cover). Ask the seller to provide:

The make and model of panels and inverter
The installation date (shown on the MCS certificate)
Any warranty registration documents and whether warranties are transferable
Copies of any annual servicing records

An inverter approaching end of warranty is worth factoring into your offer — replacement typically costs £500–£1,500 depending on system size. For more context on how system components perform over time, see our article on solar battery lifespan, which covers degradation rates in detail.

6. Finance charges on the panels

Check whether any finance, charge, or hire-purchase agreement is secured against the panels. Some lease schemes registered a legal charge with HM Land Registry, and some homeowners financed their installation through a loan secured on the property. Your solicitor's standard title search should reveal registered charges; ask them to confirm explicitly that there are no third-party interests in the solar installation itself.

If a charge exists, it must be discharged at completion or assumed by you with lender consent — both outcomes require careful legal management before you exchange.

7. Your mortgage lender's position

Most mainstream UK lenders now accept properties with owned solar panels without issue. The UK Finance Mortgage Lenders' Handbook (clause 5.20 for England and Wales) sets out minimum requirements where a lender consent is needed for a roof-space lease. Lenders broadly require:

The lease term must not exceed 30 years
The lender has an unconditional right to terminate the lease if they need to repossess
The installation was carried out by an MCS-certified installer

Leased panels remain a complication. Some lenders refuse outright; others impose strict conditions. If the property has a rent-a-roof lease, confirm your lender's position before making a formal offer — not after. In Northern Ireland the legal framework is different and a lease of rights (rather than a lease of roof space) is required by lenders.

8. EPC rating and insurance

A correctly installed and grid-connected solar system should be reflected positively on the property's Energy Performance Certificate (EPC). Solar panels that generate electricity can push a property into a higher EPC band, which has implications for mortgage affordability assessments and future minimum energy efficiency requirements. Check that the EPC acknowledges the solar installation — if it was assessed before the panels were fitted, the rating may be outdated.

On insurance: most standard home and buildings policies cover rooftop solar panels as part of the structure, but cover levels vary. Contact the insurer directly before completion to confirm the panels are included in the rebuild value and whether any specialist endorsement is needed. This is particularly important if the panels are leased, as the insurer may need to note the third-party interest.

Quick reference checklist

Ownership: Owned outright, or leased/rent-a-roof? Get title search and lease documents.
MCS certificate: Request original; check installer was MCS-accredited.
DNO registration: G98 notification or G99 approval letter from the seller.
SEG/FiT status: Clarify which scheme; plan transfer or new application after completion.
Age and warranty: Panel and inverter model, installation date, transferable warranty docs.
Finance charges: Confirm no outstanding charges or hire-purchase via title search.
Mortgage lender: Check lender criteria for leased panels before offering.
EPC and insurance: Confirm panels are reflected in EPC and covered by buildings insurance.

Done properly, buying a home with solar panels is straightforward. The system adds real value — reduced bills, export income, and a better EPC — provided the documentation is in order. A solicitor experienced in solar property transactions and an early conversation with your mortgage lender are the two most important steps you can take.