The electrical installation in a Maida Vale mansion flat has an unusual property: quite a lot of it is not in your flat. The supply comes off a rising main somewhere in the building. The meter may be in a communal cupboard on the landing, or in a bank of meters in the basement. The cable that feeds you passes through parts of the block you have no key to. What you own, electrically speaking, often starts a good distance from your front door — and that single fact governs most of what can be done, how quickly, and who has to agree to it.
This is the opposite of a house, where everything from the cut-out onwards is yours to sort out. In a block, the first job is working out where your installation actually begins.
Rising mains, meter cupboards and the landlord's supply
Edwardian blocks were not built with electricity as we now use it, and the distribution has been retrofitted, extended and modernised in waves. In most blocks you will find a supply entering the building, a rising main taking it up through the structure, and tails branching to each flat's meter and consumer unit. Alongside it runs the landlord's supply, feeding the communal lighting, the lift, the entryphone and whatever plant the block has.
Several practical consequences follow:
- Your available capacity may not be your decision. If you want more load — a new shower, electric heating, an EV point in a parking space — the question is what the rising main and your supply can carry, not merely what your consumer unit can hold. That is a conversation with the managing agent and often the distribution network operator, and it is best had before, not after, a kitchen is designed around it.
- The meter cupboard is usually communal. Work in it typically needs the building's agreement and, frequently, a porter to open it.
- The tails between your meter and your unit may cross communal space. Replacing them is then not purely your work.
- Communal and flat installations age at different rates. A beautifully rewired flat can still sit behind decades-old distribution. Worth knowing, even if it is not yours to fix.
None of this is a reason for pessimism — these blocks are generally robust and well built. It is a reason to establish the boundary and the capacity early, in writing, with the managing agent. Your lease sets out what forms part of your demise; check it rather than assume.
What tends to be found behind the plaster
The wiring history of a mansion flat is usually visible in layers. Somewhere in the fabric there may still be very old cable — rubber-insulated, cloth-covered, or lead-sheathed — surviving in a run that a later rewire did not reach, typically feeding a hall light or a redundant point that was capped rather than removed. Above that sit one or more generations of rewiring, done at different times, to different standards, by different people, often with the flat's layout at the time in mind rather than the layout it has now.
The result is an installation that works but has grown. Spurs off spurs. A circuit added for a kitchen extension that was never load-assessed. A consumer unit changed without the circuits behind it being examined properly, which produces the specific and common situation of modern protective devices guarding cable that is not really up to it.
Old cable is not automatically dangerous, and age alone is not a reason to strip a flat. Testing is what tells you. What is genuinely a problem is a hidden mix of old and new that nobody has ever mapped, because it means every future job starts with an archaeological dig. If a flat has never been properly recorded, an inspection that produces a real schedule of circuits is the most valuable thing you can buy first.
EICRs when someone lives there
Electrical work in dwellings falls under Building Regulations Part P and installations are tested to BS 7671. Rented homes in England need an electrical installation condition report at least every five years under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020.
In a block, the awkward part of an EICR is rarely the testing. It is the choreography. The tenant has to be in or the agent has to let us in. Access may need booking with the estate office. The meter cupboard may need the porter. Power goes off during testing, which matters more when a neighbour's freezer shares a circuit history nobody has mapped. And if remedial work follows, that is a second appointment unless someone planned for it.
We would rather do this in one properly booked visit with the remedials priced and ready to authorise, than in three visits spread over a month. If you also need a gas safety check — required annually where there is a gas appliance under the Gas Safety (Installation and Use) Regulations 1998 — put it on the same day. One appointment is easier on the tenant and cheaper on you; our Maida Vale plumbers work off the same schedule.
Rewiring a mansion flat: the real constraints
A rewire in one of these flats is a lesson in working within someone else's building.
Floors. Cables want to run under floors. Floors in a mansion block are the ceiling of the flat below, and most leases have rules about floor coverings and acoustic performance. Lifting them is usually possible; leaving them in a worse acoustic state than you found them usually is not. Anything that changes floor finishes typically needs freeholder or managing agent consent.
Walls. Chasing into a party wall between flats is a different proposition from chasing an internal partition. Solid masonry, neighbours the other side, and noise that carries.
Noise and hours. Chasing is loud, and everybody in the block can hear it. Expect permitted working hours, and expect them to be enforced. Plan noisy work into a defined window rather than scattering it across three weeks; it is the single most effective thing you can do for your relationship with the block.
Ceilings. Original lath and plaster with cornice is fragile and expensive to reinstate. Route around it where possible.
Access. Materials in and waste out via a specified route, with protection down on communal floors and in the lift. If there is a porter, they are the most useful person in the building — brief them, do not surprise them.
Because of all this, a rewire in a block is usually best folded into a wider programme rather than run as a standalone. If the flat is being reworked, see refurbishment in Maida Vale, where the electrics sit inside one programme and one set of consents.
Bathrooms and kitchens in this stock
Bathrooms engage Part P for electrics, Part F for ventilation and Part G for sanitation and hot water. In a mansion flat, the electrical side interacts with the plumbing in ways worth planning: bonding to metallic pipework that continues into a communal riser, extract that has to reach a ventilated route rather than a convenient void, and the load an electric shower adds to a supply that may already be near its limit. Move a fitting and you have both a consent question and a capacity question. See the Maida Vale bathroom refurbishment page for how the whole room is best sequenced.
What helps us before we arrive
- Where your meter is. In the flat, on the landing, or in the basement — it tells us a great deal.
- A photo of the consumer unit, with the cover on. Send it on WhatsApp.
- Your supply rating if you know it, and anything you have been told about capacity.
- Whether the block has a porter or estate office, and how access is normally arranged.
- Any previous EICR or certificate, however old.
- What you are actually trying to achieve. "More sockets" and "an electric shower" lead to very different conversations about the rising main.
One further point that saves people money: tell us early if the flat is being sold or let, because that changes what is worth doing. A report with a schedule of circuits and a clear list of remedials is what a buyer's surveyor or a letting agent wants to see, and producing it in one visit is straightforward. Producing it retrospectively, after work has already been done piecemeal by several people, rarely is. The same applies in reverse: if you have just bought a flat in one of these blocks and intend to rework it within a year or two, there is little sense in spending on cosmetic electrical improvements now that a later programme will strip out. Better to establish the condition, fix anything genuinely unsafe, and hold the rest until the wider scope is decided.
Our electrical services page covers the trade in general, and the Maida Vale area page covers the rest of what we do in W9. If your flat is one of the lower-ground or garden flats in a converted villa nearer the canal, damp rather than shared distribution tends to be the governing issue — see our Little Venice electrician page.
How we price it, and who you deal with
Electrical work starts from £80. Before anything begins you get a fixed quote against a defined scope, and if the testing changes the picture — a capacity limit, a circuit that will not take what you want to put on it — you hear that with options, not as a surprise. One person co-ordinates the work, talks to the porter and the managing agent, and stays reachable throughout. Request a quote and we will come back quickly.