Solar in commercial property: Cutting service charges without cutting corners

Sustainability is no longer optional in commercial property. Investors, occupiers, regulators and the market now expect buildings to demonstrate genuine carbon reduction and clear ESG progress. At the same time, landlords and agents are under pressure to keep service charges under control, reduce operating costs, and maintain competitive EPC ratings.

It is little surprise, then, that solar panels have become a new focus. They offer a visible way to cut energy bills, strengthen green credentials and future-proof assets against tightening regulation. Government policy is pointing in the same direction, with support for a so-called “rooftop revolution” that encourages installation on existing buildings.

In practice, the road to rooftop solar is not straightforward. For commercial property professionals, the challenge is less about whether solar should be installed, and more about how to structure projects so they deliver savings without creating legal disputes, valuation issues or operational headaches.

Handled well, solar can be a valuable part of an asset management strategy. Handled poorly, it can impact value and occupier trust, whilst leaving landlords exposed to unexpected costs.

Service charges

Energy is now one of the most volatile elements in any service charge budget. Tenants are demanding greater transparency, and agents are expected to demonstrate they are actively managing costs. Solar can provide a direct response by generating power on site, reducing reliance on the grid and passing through savings to tenant service charge which is attractive..

The difficulty lies in how those savings are accounted for. In a single-let building, the position may be relatively simple, with the tenant directly benefiting from reduced bills. In multi-let assets, however, the challenge is to divide benefits fairly. Do tenants receive credits against their service charge accounts? How is consumption measured and allocated? Can the capital costs of installation or roof reinforcement legitimately be treated as service charge expenditure?

Unless these points are addressed at the outset, disputes can follow. A sustainability project designed to cut costs can end up as a flashpoint in service charge negotiations. For landlords and agents, the key is to build clear accounting and allocation mechanisms into leases, licences and service charge schedules.

Leasing and control

Every landlord knows the roof is one of the most sensitive parts of a building. Allowing solar panels changes that equation. It introduces new kit, new risks and new obligations. Tenants may want to drive installations, but landlords must retain control to protect the long-term health of the asset. If the Landlord retains the common parts and maintains them using the roof area for common benefit may be easier.

That control comes through documentation. A small system serving a single occupier may be covered by a licence. Larger or multi-let installations often require more formal arrangements, sometimes even underleases of defined roof zones to a solar provider. Without clear drafting, ownership and responsibility can become muddled. Panels may automatically become the landlord’s property at lease expiry or, conversely, be left as a liability with no clear party responsible for removal.

Clarity is essential. The documents should spell out who owns the panels, who maintains and insures them, and who must reinstate the roof at the end of the lease. Without those provisions, landlords risk inheriting defective systems, disputes with insurers, or unexpected reinstatement bills.

Value and funding

In theory, solar should enhance an asset’s value. Reduced energy costs, improved EPC ratings and tangible ESG performance are all attractive to purchasers and lenders. However, the uplift only materialises if the supporting paperwork is bankable.

Valuers and funders will look for a complete pack of documents: planning and building control sign-offs, grid connection letters, installer warranties, collateral warranties, insurance endorsements, power-purchase agreements, and clear service charge treatment. If these are inconsistent or missing, confidence evaporates. Panels may be viewed as a liability that undermines value rather than a feature that enhances it.

Conversely, a well-documented installation can strengthen buyer appetite, support refinancing and demonstrate future-proofing at a portfolio level. For institutional investors with climate targets, or regional landlords seeking competitive debt pricing, that bankability can make the difference between an attractive investment and a stalled deal.

Structural realities

Not every roof can accommodate solar. Panels add weight and point loads, and wind uplift and snow loading need to be recalculated. Many warehouse and retail roofs were designed with limited spare capacity. As such, reinforcement works, such as purlin strengthening or membrane replacement, may be required.

The commercial question is who pays. In multi-let estates, pushing structural costs through the service charge is rarely acceptable. More often, reinforcement is made a condition of consent, with the cost falling to the tenant or solar provider. Where reinforcement benefits the building beyond the life of the solar system, parties sometimes agree a cost-sharing formula, but this requires careful drafting to avoid disputes over disguised premiums or rent review consequences.

Planning, compliance and building safety

Solar may be encouraged by policy, but that does not remove the need for compliance. Some installations fall within permitted development rights, but others require express planning permission, especially in conservation areas or on listed buildings. Building regulations always apply, and fire safety has become a sharper focus, with attention on cable routing, isolator placement, maintenance access and emergency shut-down.

Health and safety obligations arise during installation and throughout operation. Safe access routes must be agreed and recorded, method statements observed, and inspection regimes maintained. If corners are cut, liability can fall back on the landlord. For developers, there is also the issue of warranties, too. If the main contractor excludes solar from its scope, funders and purchasers will expect direct collateral warranties from the Solar provider. Without these, forward sales and refinancing can stall.

Insurance and liability

Adding solar changes the building’s risk profile. Insurers will want to see evidence of proper design, recognised standards, commissioning and inspection. Fire is the most obvious concern, but drainage, wind uplift and water ingress also matter.

The allocation of responsibility must be explicit. Who insures the panels themselves, and who insures the building? How are deductibles shared? If the landlord needs to de-energise the system to carry out roof works, who bears the cost of lost generation? If a claim spans property damage and tenant business interruption, how are proceeds distributed?

Without clear answers, disputes can drag out claims and delay recovery. With well-drafted documents, recovery can be swift and responsibilities clear.

Funding mechanics

Where a solar provider finances its system through a lender, landlords are often asked to sign direct agreements. These typically commit not to terminate the provider’s rights without notice, allow cure periods, and may give the lender step-in rights.

For landlords, the risk is loss of control over the roof or building. Step-in rights must be tightly defined, time-limited and subject to core landlord protections. Priority and registration issues should be addressed early, so that a building-level refinance is not derailed by a later-discovered solar security interest.

In practice, lenders increasingly probe the detail. They expect to see clean documentation before funding installations, refinancing assets or consenting to alterations. For landlords, that means treating lender requirements as part of the project plan, not an afterthought.

The tenant exit problem

One of the thorniest issues arises when tenants leave. Many solar projects rely on a power-purchase agreement (PPA) between the tenant and the provider. That makes sense during occupation but becomes problematic at break or surrender.

If not managed, the landlord can find themselves on the hook as “buyer of last resort”, forced to take power they never wanted at terms they did not negotiate. The solutions are clear – PPAs that automatically terminate on lease expiry, or tenant obligations to novate them to successors,but unless these are built in from the outset, exposure is real.

For landlords, the safest route is to make exit treatment a condition of consent, backed by security such as deposits or guarantees to cover termination costs. That ensures risk does not fall unexpectedly on the landlord.

Sector nuances

Solar interacts differently across sectors. In logistics, programme risk dominates: shutting down roof access or power supply, even briefly, can carry significant commercial penalties. Emergency access routes, smoke venting and interaction with racking layouts all need consideration.

In retail, glare, signage and roof warranties are common flashpoints. For offices, the issues often centre on aesthetics, planning optics and façade penetrations. Each sector has its friction points, and documents should reflect the operational reality of the asset.

Agents and asset managers

Agents are increasingly the bridge between landlord ambition and day-to-day reality. They are tasked with aligning sustainability targets with tenant relations, service charge management and building performance. Solar sits at that intersection, and success depends on more than just a consent letter.

Agents who can translate ESG objectives into bankable, well-structured solar projects are adding genuine strategic value. That means anticipating the service charge implications, ensuring roof rights are properly documented, and delivering an installation that strengthens rather than complicates the asset.

Bringing it together

Solar should not be treated as a bolt-on. It is a long-term operational decision that touches leases, service charges, insurance, funding and valuation. Projects that succeed are those embedded in the asset’s business plan, not added on at the margins.

That means:

• Engaging early on ownership, service charge and roof rights.
• Treating reinforcement, insurance and warranties as design issues, not afterthoughts.
• Ensuring exit routes are documented before installation begins.
• Preparing bankable documentation packs for funders and valuers.

Handled with care, solar can reduce service charges, strengthen occupier relations, support refinancing and future-proof portfolios. Done poorly, it can undermine valuations, erode trust and create disputes.

At Newmanor, we believe solar should strengthen commercial property, not weaken it. By embedding projects into the business plan from day one, landlords, developers and agents can deliver cost savings, meet ESG targets and protect long-term value.