Buying a House With Solar Panels: What Should Be Checked Before Exchange?
Buying a House With Solar Panels: What Should Be Checked Before Exchange?
Solar photovoltaic panels can reduce electricity costs and allow a homeowner to generate renewable energy. They can be an attractive feature when buying a property, particularly where the installation is modern, properly maintained and supported by suitable documentation.
However, solar panels also introduce additional legal, electrical and building-related matters. Buyers should establish who owns the system, whether it was properly installed and whether the roof remains in satisfactory condition before exchange of contracts.
Who Owns the Solar Panels?
Do not assume that the panels belong to the seller simply because they are fixed to the roof. Some installations were provided under “rent-a-roof” arrangements. Under these schemes, a solar company retains ownership of the panels and receives the associated generation income. The homeowner grants the company rights over the roof, often under a long-term lease. Such arrangements can affect:
· mortgage lending;
· future roof repairs;
· extensions or loft conversions;
· removal or relocation of panels;
· buildings insurance; and
· the future sale of the property.
Your solicitor should establish whether the system is owned outright, financed, leased or subject to any continuing agreement. Where a lease exists, its terms and acceptability to the proposed mortgage lender should be checked before exchange.
Is the Installation Properly Documented?
The seller should be asked to provide the available installation records. These can include:
· the original quotation and specification;
· the installer’s details;
· commissioning documents;
· electrical certification;
· warranties for panels and the inverter;
· evidence of any required network notification or approval;
· planning or listed-building consent, where applicable; and
· maintenance and repair records.
Certification associated with the original installation may also be relevant to payments or export arrangements.
Missing paperwork does not necessarily mean that the system is unsafe. It does, however, create uncertainty about its design, age, ownership, compliance and remaining warranty protection.
Were Planning Restrictions Relevant?
Roof-mounted solar panels can often be installed without a specific planning application, subject to limitations and conditions. Additional controls can apply to listed buildings, conservation areas and installations that project significantly beyond the roof covering. Panels installed on a flat roof, outbuilding or within the grounds can also require closer consideration. Your solicitor should confirm whether planning permission, listed-building consent or another approval was required and, if so, whether it was obtained.
Is the Roof in Suitable Condition?
Solar panels can remain in place for many years, while the roof covering beneath them continues to weather and deteriorate. A roof that was already approaching the end of its serviceable life when the panels were installed can become expensive to repair. The panels may need to be temporarily disconnected, removed, stored and reinstated before roofing work can proceed. The survey should consider, where visible:
· the age and condition of the roof covering;
· slipped, damaged or missing tiles;
· evidence of water penetration;
· roof deflection or distortion;
· defective flashings;
· the position of panel fixings;
· disturbed or poorly replaced tiles; and
· the condition of accessible roof timbers.
Much of the roof surface will be obscured by the panels. A visual survey therefore cannot confirm the condition of every concealed tile, fixing or weatherproofing detail.
How Are the Panels Fixed?
Solar panels should be securely supported and fixed without compromising the roof covering. Poor installation can result in cracked tiles, inadequate weatherproofing and localised water penetration. Fixings should transfer loads safely to the roof structure rather than relying solely on tiles or slates. Wind loading is also important because panels sit above the roof surface and can be exposed to uplift forces. The mounting system is rarely fully visible during a standard survey. If movement, leakage or poor workmanship is suspected, specialist inspection by a competent solar installer or roofing contractor should be arranged.
Is There Evidence of Leakage or Structural Stress?
The installation adds weight to the roof, although a conventional domestic system will not automatically cause structural problems. Concerns arise where the roof was already defective, altered or inadequately strengthened. Warning signs within the loft can include:
· cracked or deflected rafters;
· displaced supports;
· water staining;
· damp insulation;
· daylight around fixings;
· corrosion to metal components; and
· makeshift structural alterations.
Any significant distortion or damage can require assessment by a structural engineer.
What Condition Is the Electrical Equipment In?
Solar panels form part of an electrical installation. The associated equipment can include an inverter, isolators, cables, meters, control devices and battery storage. The inverter has a shorter anticipated service life than the panels and can require replacement during the ownership of the property. Its age, location, condition and warranty should therefore be established. Cables should be appropriately supported and protected. Improvised routing through roof coverings, loft hatches or external walls can create defects and increase the risk of damage.
A building survey is not an electrical safety test. Where the documentation is incomplete or the equipment raises concern, inspection by a suitably qualified electrician or solar specialist should be undertaken before exchange.
Are Birds Nesting Beneath the Panels?
The space beneath roof-mounted panels can provide shelter for pigeons and other birds. Nesting material can obstruct gutters, cause noise and fouling, and create maintenance difficulties. Mesh guards can reduce access, but they should be properly fitted without damaging the panels or roof covering. Loose or poorly secured guards can themselves require repair. Buyers should ask whether bird-control work has previously been required and whether the gutters are regularly cleared.
Are Payments or Export Arrangements Transferable?
Older systems can be connected to financial arrangements based on electricity generation, while newer installations may receive payments for exported energy. The buyer should not assume that an existing tariff, account or payment automatically transfers with the property. The seller and solicitor should confirm:
· which scheme applies;
· who currently receives the payments;
· whether the arrangement can be transferred;
· what readings and documents are required; and
· whether any finance remains outstanding.
Predicted energy savings should also be treated cautiously. Performance depends on the orientation, pitch, shading, system condition and household electricity usage.
What Can a Survey Confirm?
A surveyor can assess the visible condition of the roof, accessible roof structure and installation. The inspection can identify staining, damaged coverings, structural movement, poor cable routing and other warning signs.
However, a standard survey is visual and non-destructive. It does not test electrical output, verify ownership, confirm tariff eligibility or certify concealed fixings.
For a property with extensive solar equipment, battery storage, an older roof or incomplete documentation, further specialist inspection should be completed before exchange.
Details of Rectory Surveyors’ residential survey services are available at:
To discuss a property before arranging an inspection, please contact:
Solar panels can be a valuable feature, but the benefits depend on clear ownership, sound installation and a roof capable of supporting the system throughout its remaining serviceable life. Investigating these matters before exchange can prevent unexpected legal restrictions and repair costs.
Rectory Surveyors are experts in building and surveying, friendly and experienced, with a high degree of professionalism for all your surveying requirements. Learn more >
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