This is one of the most common and most expensive misunderstandings in Central London flat refurbishment. Someone buys a flat in a mansion block, takes up the tired carpet, finds boards underneath, and has a wood floor fitted. Six weeks later the flat below complains that they can hear every footstep. The managing agent writes. Someone reads the lease properly for the first time. And the question stops being about flooring and starts being about whether the floor comes back up.
It happens constantly, and it is almost entirely avoidable. The information you need exists, it is in your own paperwork, and it takes an afternoon to establish. The problem is that nobody looks until after the adhesive has gone off.
The rules come from your lease, not from the internet
Start here, because everything else follows from it. In a leasehold flat, what you may do to your floor is governed principally by the terms of your own lease, together with any block regulations or house rules made under it. These are private contractual terms. They were drafted for that building, sometimes decades ago, and they vary enormously — between blocks, between buildings on the same street, and sometimes between flats in the same building where leases were granted at different times.
That means there is no universal rule anyone can tell you. Not us, not a flooring showroom, not a neighbour who did theirs last year, and not an article. Anyone who tells you confidently what is required in a Central London flat without having read your lease is guessing. What we can usefully describe is the shape these clauses tend to take, so you know what to look for and what to ask.
What these clauses usually look like
Broadly, lease provisions about floors tend to fall into a few recognisable families, and a lease may contain more than one of them.
Some leases restrict hard floor finishes directly, requiring the floors of the flat, or of particular rooms, to be kept covered with carpet or similar. Some express this as a proportion of the floor area that must be carpeted, with exceptions commonly carved out for kitchens and bathrooms. The stated proportion varies between leases, and you should read your own rather than assume a figure you have heard elsewhere.
Some leases prohibit altering the floor finish, or doing anything that changes the level or construction of the floor, without the landlord's written consent. Some require any hard finish to be laid over an acoustic layer meeting a stated standard or achieving a stated level of performance, which we go into in our guide to acoustic underlay requirements for flats.
Almost all leases contain a general nuisance or quiet enjoyment covenant: an obligation not to do anything that causes annoyance or disturbance to other occupiers. This one matters more than people expect. Even where a lease is silent on flooring specifically, a floor that makes the flat below unliveable can put you in breach of a nuisance covenant. Silence on floors is not permission.
Finally, many blocks have regulations or house rules sitting alongside the lease, which the lease itself may allow the landlord to make and vary. These often deal with floors, and they can be updated over time, so an old copy in your purchase pack may not be current.
Why mansion blocks are the hard case
The building stock explains most of this. Central London mansion blocks — the Victorian and Edwardian ones through Marylebone, Maida Vale and Bayswater, the 1930s ones in St John's Wood — were built with timber floors on joists. Your floor is the ceiling of the flat below. There is no meaningful separating structure, just a deck, a void, and lath or plasterboard beneath.
That construction transmits impact noise extremely well. Impact noise is not a sound travelling through air; it is energy put directly into the structure by a heel, a dropped object, a chair leg, or a dog's claws, which then radiates into the room below. Carpet and underlay are remarkably effective against it, essentially by absorbing the impact at source. That is why so many of these leases were written around carpet: at the time they were drafted, carpet was simply what floors were, and it happened to solve a problem nobody had to name.
Take the carpet away and lay a hard finish directly on the deck, and you have removed the one thing making the arrangement work. This is why the complaint is so predictable and why it is usually genuine rather than a neighbour being difficult. The flat below is not imagining it. Their acoustic environment has materially changed, and they did not agree to it.
Newer blocks, including the concrete-framed stock around Paddington Basin, behave differently — mass helps — but they are not immune, and their leases and building rules commonly address floors too.
Building Regulations Part E: relevant, but probably not the point
People often reach for Building Regulations here, so it is worth being precise about the limits of that argument. Part E deals with resistance to the passage of sound. It is, however, principally directed at new build and at material changes of use such as conversions — situations where separating floors and walls are being created or formed — rather than at replacing a floor finish in an existing flat.
So in most cases, swapping carpet for wood in an existing mansion-block flat is not the situation Part E is aimed at, and pointing at it will not tell you what you are allowed to do. It can become relevant if what you are doing is more substantial than a change of finish — a conversion, a material change of use, or works forming a new separating floor — and the position depends on the specifics. You should confirm how it applies to your particular works with your managing agent, your surveyor, and where appropriate the local authority building control body or an approved inspector, rather than relying on a general statement here.
The practical point is this: your lease is likely to be the binding constraint long before Building Regulations are, and your lease can require more than any regulation would. Complying with a regulation is not a defence to breaching a covenant.
Do this before you buy flooring
The order of operations is the whole game. Do it in this sequence and this is administration. Do it backwards and it is a dispute.
First, read your lease. The relevant provisions are usually in the tenant's covenants, in a schedule of regulations, or both. Look for anything about floor coverings, carpet, alterations, and nuisance. If the drafting is old or unclear, do not interpret it optimistically on your own — leases are legal documents and this is exactly the situation where a solicitor's half-hour is cheap.
Second, ask your managing agent or freeholder in writing what is required, and what consent process applies. Ask specifically whether they require a particular specification or standard, whether they need to approve the build-up, and whether they require anything to be demonstrated after the work. Ask for the current block regulations rather than relying on the copy in your purchase pack. Get the answer in writing and keep it.
Third, if consent is required, apply before ordering. Consent for alterations frequently comes as a formal licence to alter, and freeholders often charge their own and their surveyor's costs. It takes time. Build that time into your programme rather than discovering it when the fitter is booked.
Fourth, tell the flat below. This is not a legal requirement and it is the highest-value thing on the list. Neighbours who were told what was happening, and who were given a name and a timeframe, complain far less than neighbours who woke up to a hammer.
If the floor is already down
If you are reading this after the complaint, the position is more awkward but not hopeless. Get the lease read properly now. Establish whether you are actually in breach, because you may not be, and an aggressive letter is not the same as a legal position.
If consent should have been obtained, retrospective consent is sometimes possible, though a freeholder is under no obligation to be accommodating and is negotiating from strength. If the floor genuinely fails what the lease requires, the honest range of outcomes runs from adding an acoustic remedy where the build-up allows, through rugs and adjustments that address the practical complaint, to lifting the floor and relaying it correctly. Which of those is available depends on how the floor was laid, and a bonded floor is much less forgiving here than a floated one.
This asymmetry is worth stating plainly, because it is the reason this page exists. Doing it properly first costs a specification conversation and possibly a consent fee. Doing it wrongly can cost the entire floor twice, plus the freeholder's costs, plus a neighbour you now have to live above.
What to ask any flooring contractor
Ask whether they have read the requirement, or only heard it described. Ask what acoustic layer they propose and what it is being specified against. Ask what the total build-up height is and what that does to your doors and thresholds, because acoustic layers add height and that height has to go somewhere. Ask how the floor meets the edges, since a floating acoustic floor bridged rigidly to the skirting or a pipe can transmit straight into the structure and undo the layer beneath. Ask whether they will put the proposed specification in writing so you can send it to the managing agent for approval.
A contractor who waves this away is telling you something useful about how the job will go.
Where we come in
We ask what your lease says before we talk about boards, because the answer changes the specification and sometimes the price. We will put a proposed build-up in writing for you to send to your managing agent, and we will tell you honestly if what you want is not compatible with what your block requires. Our wood flooring work starts from £30/m² and is confirmed by a fixed quote before anything begins; if you are still weighing up the finish itself, our guide to engineered versus solid wood covers the practical trade-offs. Where flooring sits inside a wider refurbishment, we sequence consent first, not last.