Category: Legal

Selling a Building with a Solar PPA in Place

Selling a commercial property with a solar PPA on the roof? How change-of-control, assignment and novation clauses affect the sale, and what buyers demand.

Yes, you can sell a commercial building with a solar power purchase agreement in place — but the PPA does not vanish at completion. It is a long contract attached to your roof and meter, so the incoming owner inherits it. How cleanly that transfer happens depends entirely on the change-of-control, assignment and novation clauses you agreed years earlier.

Why a PPA complicates a property sale

A solar PPA is not the same as a utility supply contract you can simply close. The panels are owned and operated by a third party who has invested capital expecting 10 to 25 years of off-take revenue from your site. To protect that revenue, most agreements are backed by a registered lease, a rooftop licence or a wayleave against the title, plus step-in rights for the provider's lender. When you sell the freehold or assign the leasehold, those interests pass to the buyer whether or not anyone reads them in advance.

The result is that the PPA becomes a live issue in conveyancing. The buyer's solicitor will find the registered interest at the Land Registry, raise enquiries, and refuse to complete until the energy contract is understood. Handled early, this is routine. Handled at the eleventh hour, it stalls the transaction and hands the buyer a reason to chip the price. This piece focuses on the property transaction; if you are selling the trading company rather than the building, the share or asset-sale angle is covered separately in our note on PPA assignment on the sale of a business.

What the contract clauses actually do

Three clauses govern what happens at sale. Read your executed PPA — not the heads of terms — for each one.

Change-of-control

This triggers when ownership of the site or the off-taker entity changes. A well-drafted clause permits transfer to any buyer of comparable size and covenant without provider consent. A restrictive one gives the provider an approval right, the ability to demand fresh guarantees, or in some cases a fair-market-value buy-out on disposal.

Assignment

Assignment is your right to pass the contract to the new owner. If assignment is freely permitted, the sale is straightforward. If it requires provider consent "not to be unreasonably withheld", build in time — the provider will run a credit check on the buyer's covenant before agreeing.

Novation

Novation is the mechanism that does the work. Unlike assignment, which transfers your rights, novation substitutes the buyer for you as a brand-new party, releasing you from all future PPA obligations. A property buyer's lawyer will almost always insist on a deed of novation rather than a bare assignment, precisely because it gives the seller a clean exit and the buyer direct privity with the provider.

Mechanism	Effect on seller	Provider involvement
Assignment	Transfers rights; residual liability can remain	Often consent-based
Novation	Full release; clean exit at completion	Must be a party to the deed
Buy-out on change-of-control	Pay to terminate; PPA ends	Provider sets the figure or formula

What a property buyer will demand

Acting for the purchaser, a competent commercial property solicitor treats the PPA as an encumbrance and works through a predictable enquiry list. Expect to supply all of the following.

• A certified copy of the executed PPA and every variation or side letter
• The registered lease, rooftop licence or wayleave, and its expiry date relative to the building's use
• The current tariff per kWh and the escalator basis, so the buyer can model future cost against market
• Evidence of the provider's covenant strength — the buyer inherits a counterparty, not just a contract
• Confirmation of the provider's lender step-in rights and any restrictions on the buyer's future works to the roof
• A signed deed of novation, executed at or before completion, naming the buyer as incoming off-taker

Two of these decide whether the PPA helps or hurts the price. First, an over-market tariff is a future liability the buyer will discount against. It is worth running an indicative PPA tariff per kWh check against current rates so you can pre-empt the argument. Second, the buyer is taking on a long-term relationship with a third party, which is why the PPA off-taker covenant works both ways — the provider vets the buyer, and the buyer scrutinises the provider's financial stability before signing.

How to structure the sale upfront

The cheapest time to fix a transfer problem is before you list the property — ideally before you ever sign the PPA. If you are still negotiating the original contract, push for assignment to any comparable-covenant buyer without consent, a capped or zero assignment fee, and a pre-agreed novation template annexed to the PPA. Those three terms remove almost every obstacle a future sale could throw up.

If the PPA is already signed and you are now selling, work the sequence in this order.

1. Audit the clauses early. Pull the executed PPA and identify which transfer route applies before you instruct an agent.
2. Notify the provider. Many contracts require notice of a proposed sale. Open the conversation before the buyer's solicitor does — providers cooperate far more readily with a seller than with an unknown purchaser.
3. Draft the deed of novation in parallel. Don't wait for buyer enquiries. Have the tripartite deed ready so it slots into the conveyancing timetable.
4. Disclose in the data room. Put the PPA, the registered interest and the proposed novation into due diligence from day one. Surprises late in a deal cost money; early disclosure builds buyer confidence.
5. Resolve any provider fee. If the contract allows an assignment or consent fee, agree the figure before exchange so it does not become a completion-day renegotiation.

Where the PPA sits against alternatives in the buyer's eyes

A property buyer assessing the rooftop system is implicitly weighing the PPA against the routes they could have chosen instead. Understanding that framing helps you present the contract as an asset rather than a burden. A buyer who would have bought the system outright sees the PPA as a financing structure that conserved your capital — useful context, which is why our guide to comparing a PPA against buying solar is worth sharing in the data room. It explains why a no-capex contract exists in the first place and what the buyer gains by stepping into it: continued discounted power with no maintenance liability, because the provider keeps the asset and the obligations attached to it.

One nuance that reassures buyers: the system is genuinely income-generating for the building, not a stranded cost. The export side of the arrangement, where surplus generation earns revenue, differs from a domestic export tariff — our explainer on SEG versus PPA export sets out why commercial PPA economics are structured around on-site consumption rather than grid export, which is exactly what a buyer occupying the building wants.

What happens if the buyer does not want the PPA

Occasionally a purchaser refuses to take the system — they plan to redevelop the roof, or simply want a clean asset. In that case you are back to the contract's exit provisions. Some PPAs allow a buy-out at a fair-market-value figure on change-of-control; others run to natural expiry only. Either way, the costs and ownership questions at the end of the term are governed by the same clauses, set out in our note on what happens at the end of a PPA contract. If a buy-out is the route, model it early: it is a real number that comes off your net sale proceeds, and you would rather know it before you agree a headline price than after.

The short version

• The PPA transfers with the building — plan for it, don't discover it
• Novation, not assignment, gives the seller a clean release at completion
• The buyer's solicitor will treat the PPA as a title encumbrance and enquire in full
• Over-market tariffs and weak provider covenants are the two things that depress value
• Disclose everything in the data room on day one; surprises late in a deal cost real money

Find out where your contract stands

If you are preparing to sell a building with a solar PPA on the roof — or weighing a PPA before a future disposal — an independent read of your transfer clauses is the cheapest insurance you can buy. We are not a provider; we match commercial sites to UK solar PPA providers and explain the contract mechanics in plain English. Tell us about your site and we will flag the change-of-control, assignment and novation terms that matter most for a sale, and return an indicative tariff range within one working day.