Buying a Frodsham home that already has solar

What changes when a house has panels

A house with panels comes with more paperwork than one without, and with more questions. Most are easy to answer if the seller kept the documents. A few, particularly in Frodsham’s conservation areas and listed buildings, are worth settling before exchange rather than after. The conveyancer will raise some of them through the usual enquiries, but not necessarily all, so it helps to know what to ask for and why.

The certificates

• The MCS certificate. It confirms the system was installed under MCS, records its size and date, and is needed by any supplier offering an export tariff.
• The electrical installation certificate. It covers the wiring work done for the system.
• Building regulations compliance. Usually a certificate issued through the installing firm’s competent person scheme, or a completion certificate from building control.
• The grid paperwork. The G98 notification or G99 approval from the network operator for the address, which the Energy Networks Association search identifies.
• Warranties. For the panels, the inverter, any battery and the workmanship, with a note of whether each can be transferred and whether any is backed by insurance.
• Manuals and monitoring. The handbook, and login details for any monitoring app or portal.

A missing document is not automatically a deal-breaker, but each gap is a question. A firm that is still trading may supply copies, and MCS can sometimes help trace a certificate through its installer records. Choosing an installer lists what a firm should have handed over in the first place, which doubles as a checklist for a buyer. How the grid paperwork works is explained on grid connection.

Consents in the conservation areas

Four conservation areas carry Frodsham’s name. In them, panels on an unlisted roof are usually permitted development under Part 14 of the Order, but three situations need something from the council: a flat roof, which needs a prior-approval decision; a wall, balcony or roof enclosure facing a highway, which needs planning permission; and a garden frame closer to the highway than the house, which needs prior approval. Where any of those applies, ask the seller for the decision and check the council’s planning records. The detail is on Frodsham’s conservation areas and solar, and the council’s conservation area pages say where each area runs.

The rules were amended in 2026 by SI 2026/896, and work begun under the earlier rules may be completed under them until 26 August 2027. A system fitted around the changeover may have been judged under either version, so ask the seller or the firm which applied.

Listed houses

For a listed building, panels needed planning permission and Listed Building Consent. Ask to see both decisions and the approved drawings, then look at the roof and check that what is there matches what was approved. Unauthorised work to a listed building can be the subject of enforcement against whoever owns it, a later buyer included, so this is one gap to close before exchange. The 2006 appraisal for the Town conservation area records many listed buildings along Main Street, and Historic England’s national list confirms whether a particular house is among them. Listed and thatched homes explains the rules.

Export payments after a sale

Under the SEG scheme, payments for exported electricity are made under an agreement between a supplier and its account holder. When the house changes hands, the seller’s arrangement goes with the seller. The buyer chooses a supplier and applies for their own, usually with the MCS certificate and the meter details, and the rate is whatever is on offer then, not what the seller had. Systems registered under the older Feed-in Tariff work differently: those payments are attached to the installation, and a new owner tells that scheme’s supplier about the change of ownership. Export and self-use explains how much a Frodsham roof tends to send to the grid.

Who owns the system

Most systems belong to the owner of the house outright. Some, mainly older ones, were fitted under a long lease of the roof space, with a company owning the panels for the term; others were bought on finance that may still be running. A roof lease affects the title and may need the mortgage lender’s agreement, and outstanding finance has to be settled or transferred. Ask the question directly and early, and pass any documents to the conveyancer.

Is it producing what it should?

Ask for the generation history: the inverter’s lifetime total, or a year of monthly readings. On the PVGIS figures for the town, a south roof at 35° makes about 941 kWh per kWp in a typical year, and an east or west roof about 749. At the foot of the hill south of the centre, the terrain takes about 3.6% from a south roof, mostly in the winter months. A system running well below the figure for its size and direction may be shaded, faulty or simply badly placed. The hill and winter sun and the hill check show what the ridge takes at different points.

The roof beneath the array

A standard survey may see little of the roof under a set of panels. Ask how the panels were fixed, whether repairs were carried out first, and when the roof was last inspected. Look in the loft below the array for staining or damp. On slate, cracked slates around the fixing hooks are easier to deal with before completion than after. If the roof is likely to need work in the next few years, the panels will have to come off and go back, with scaffold each time, which is worth knowing when agreeing a price.

Batteries and insurance

If a battery is included, ask its age, usable capacity and warranty, where it sits and whether it is covered by the grid paperwork; batteries in Frodsham explains what to look for. When arranging buildings insurance, tell the insurer about the panels and any battery from the start.

When to raise it

The earlier the better. The standard property information form a seller fills in asks about solar panels, including when they were fitted and whether they are owned outright, so the conveyancer will see the seller’s answers. But the documents behind those answers can take weeks to gather, especially if the firm that fitted the system has closed or the consent decision has to be found in old council files. Asking the estate agent for copies once an offer is accepted gives the seller time to look, and leaves room to agree what happens if something cannot be found. A missing consent for a listed house, or an unexpected roof lease, is far easier to deal with at that stage than in the last week before exchange.

A short checklist before exchange

1. Certificates: MCS, electrical, building regulations, grid.
2. Warranties and whether they transfer.
3. Any prior-approval, planning or Listed Building Consent decision.
4. Any roof lease or outstanding finance.
5. Generation records against the modelled figures.
6. The condition of the roof under the panels.

Short answers to other common questions are on the FAQ page, and a question about a particular house can be sent through the question form.