Licence to Alter Explained for UK Leasehold Flat Buyers

A licence to alter is a formal written agreement from your freeholder giving you permission to make changes to your leasehold flat. Think of it as a green light in legal form. Without it, even perfectly sensible, well-executed work can technically put you in breach of your lease.

Most leases contain a clause saying you cannot make alterations without the landlord's consent. That landlord is usually the freeholder, though in some buildings it might be a head leaseholder. Either way, someone above you in the ownership chain has a legal say over what you do to the inside of your home. It feels strange when you've just handed over hundreds of thousands of pounds, but that's leasehold for you.

The licence itself is a proper legal document. It sets out exactly what work is permitted, any conditions attached, and who is responsible if something goes wrong. It's not just a letter saying "yeah, fine, go ahead."

Not every bit of DIY triggers this. Hanging pictures, repainting walls, swapping light fittings, that sort of thing is almost always fine without asking anyone. The licence to alter territory starts when you're doing something structural or something that affects shared parts of the building.

The clearest examples are removing or altering internal walls, especially if they're load-bearing. Changing your flooring is another big one, and it catches a lot of people off guard. If you want to rip up carpet and lay hardwood or engineered timber, many leases require consent because hard floors transmit noise downward and your downstairs neighbour has rights too.

Other work that typically needs a licence includes installing underfloor heating, moving a bathroom or kitchen, creating a new doorway, adding a mezzanine level, and any alterations to pipes, drains, or electrical systems that run through shared parts of the building. If your planned work touches anything structural, anything that could affect another flat, or anything specifically mentioned in your lease as requiring consent, assume you need one and check.

The honest answer is that you should read your specific lease, because they vary enormously. Some are more restrictive than others. Your solicitor can flag the relevant clauses when you buy, so ask them directly.

You start by writing to the freeholder or their managing agent, setting out what you want to do. You'll almost always need to provide drawings, a specification of works, and the name of your contractor. For anything structural you'll usually need structural engineer's drawings too.

The freeholder will typically instruct their own solicitor and possibly their own surveyor to review your application. Here's the bit that surprises people. You pay for their professional fees, not them. That's standard in leasehold law and it's written into most leases. Freeholder solicitor costs for a straightforward licence often run to somewhere between a few hundred pounds and over a thousand pounds. Add surveyor fees if they want an inspection, and your admin costs alone can reach fifteen hundred to two thousand pounds or more before you've lifted a hammer.

On top of that, some freeholders charge a licence fee itself, sometimes called a consent fee, as a condition of granting permission. There's no fixed rate. It varies by freeholder and by the nature of the work.

Timescales are another thing to plan for. A straightforward application might take six to eight weeks. A more complex one, or a freeholder who's slow to respond, can stretch to several months. Build that into your renovation timeline and don't book contractors before you have the licence in hand.

Walls in a block of flats aren't always just yours. Some are structural and affect the integrity of the whole building. Others might contain shared services like pipes or cables. Even a non-structural partition wall might sit on a floor slab that's a shared structure, and cutting into it or removing it without proper sign-off creates real risk.

Freeholders are protective of this for good reason. If a leaseholder removes a load-bearing wall without proper structural oversight and the building is damaged, the consequences ripple out to every other flat owner. Buildings insurance can be voided. Other leaseholders can be affected. The freeholder, as the building owner, carries responsibility for the structure.

This is also why your freeholder will want to see a structural engineer's report before they'll grant consent for wall removal. Some will also require a schedule of condition before work starts, so there's a record of the building's state beforehand. They may insist on a right to inspect during and after the works. All of that is reasonable, even if it feels like a lot of hoops.

Hard flooring is probably the most common unlicensed alteration in leasehold flats. Thousands of people have ripped out carpet and laid wood or tile floors without ever asking their freeholder. It looks great, it adds value in their minds, and nobody said anything at the time.

Then they come to sell.

The buyer's solicitor sends a standard set of enquiries asking whether any alterations have been made and whether consent was obtained. The seller has to answer honestly. If they say yes to alterations and no to consent, the buyer's solicitor flags it as a potential breach of lease. The buyer gets nervous. Their mortgage lender might get nervous too, because a breach of lease can in theory give the freeholder grounds to forfeit the lease, though in practice that's rare for minor breaches.

At best, the seller has to apply retrospectively for a licence, which takes time and costs money, and the buyer may insist on a retention from the sale proceeds until it's resolved. At worst, a nervous buyer pulls out entirely. It's a genuinely stressful situation that's entirely avoidable.

Some sellers try to indemnity insurance as a fix. A specialist insurer will issue a policy covering the buyer and their lender against the risk of the freeholder taking action over the unlicensed work. It's cheaper than getting retrospective consent and it's quicker. But it's not always accepted by lenders, and it doesn't actually fix the underlying breach. It's a workaround, not a solution.

If you're buying a leasehold flat that's been renovated, ask your solicitor to check whether a licence to alter was obtained for any alterations. This should come up in the standard enquiries, but make sure you actually read the answers rather than leaving it all to your solicitor to filter.

If there's been a wall removed, flooring changed, or a bathroom moved and there's no licence on file, treat it as a negotiating point. You can ask the seller to obtain retrospective consent before exchange, or to reduce the price to account for the cost and hassle of sorting it yourself, or to put indemnity insurance in place. Which route is right depends on how significant the work is and how cooperative the freeholder is likely to be.

If you're planning alterations yourself after you move in, start the licence application early. Read your lease first, ideally with your solicitor, to understand exactly what needs consent. Budget for the freeholder's professional fees on top of your build costs. And keep all the paperwork when the licence is granted, because you'll need to produce it when you sell.

It's worth stepping back and being honest about what leasehold means for your freedom to alter your home. You own the flat, but you don't own the building. The freeholder owns the structure, and the lease is the contract that governs how you can use it. Alterations clauses exist to protect the building and the other people who live in it.

That doesn't mean freeholders are always reasonable. Some are slow, some charge fees that feel excessive, and some are difficult to deal with. The Leasehold Reform (Ground Rent) Act 2022 and the ongoing leasehold reform agenda in England and Wales are slowly changing the landscape, but for now the licence to alter process is what it is.

The practical takeaway is simple. Before you plan any significant work on a leasehold flat, check your lease, speak to your solicitor, and contact your freeholder or managing agent early. Getting consent properly is far cheaper and far less stressful than dealing with the fallout at resale. A licence to alter isn't a bureaucratic nuisance. It's your proof that the work was done with everyone's knowledge and agreement, and that proof is genuinely valuable.