Consumer Unit / Fuse Box Upgrade in London
Fuse Box Replacement in London — New Consumer Unit, Clear Price Before We Start
An inspection report that's come back unsatisfactory. A board with no RCD on it. Breakers dropping out every time the tenant runs the washing machine. We supply and fit consumer units right across London — East London, North London, South East London and beyond — with the price agreed before anyone opens the board.
- Old fuse box replaced properly
- RCD or RCBO on every circuit
- Price agreed before work starts
- Electrical Installation Certificate on completion
Serving London, East London, North London, South East London, South West London and surrounding areas.
Consumer Unit / Fuse Box Upgrade — at a glance
- Areas covered
- London, East London, North London, South East London
- Common work
- Consumer Unit, RCD, RCBO, AFDD
- Same-day appointments
- Same-day appointments are available for all our services
- Quote before work
- Yes — a clear written quote after inspection
An unsatisfactory EICR with C1, C2 or FI codes written against the board is what brings most landlords here, and clearing those codes almost always starts with replacing the board itself. Chasing an HMO or selective licence pushes the same job up the list - councils want current electrical evidence on file, and protection on every circuit is what gets you there. If the trip switch keeps going and nobody can tell you why, that's a fault waiting to be traced, not a switch to keep flicking back up - our emergency electrician cover exists for exactly that. And a board that buzzes, crackles or feels warm under your hand needs isolating and looking at now, not next month. Faults get cheaper the earlier somebody puts a meter on them.
Quick answer
A fuse box upgrade swaps an ageing board - rewireable fuses, no trip protection - for one that cuts the supply in milliseconds when a fault appears. Most London jobs follow an unsatisfactory report or a landlord licence application. We test the circuits, price the work in writing, then fit and certificate the new board. Worth booking before somebody else's deadline lands on you.
Consumer Unit Upgrade London - Done Once, Done Properly
Consumer unit upgrade work in London usually turns up with a deadline attached: a report sitting in your inbox, a licence application waiting on evidence, a tenancy starting in a fortnight. That's why consumer unit upgrade London enquiries rarely sit still - the board has already been flagged by somebody, and the clock isn't yours.
You probably know what's wrong before we arrive. Fuse wire in porcelain carriers. A rewireable fuse someone has "repaired" with a thicker bit of wire, which we still find, and which is about the most dangerous bodge in the trade. No RCD anywhere on the sockets, so nothing cuts the supply when a drill catches a cable or moisture tracks to earth in a bathroom.
What matters more than the box screwed to the wall is everything sitting behind it. Plenty of the boards we're asked to swap in North London flats and West London terraces feed cabling, earthing and bonding nobody has properly checked since the place was built. Fit something new onto that and you've spent good money making old faults harder to see.
So the testing comes first, the findings get explained without the jargon, and the number goes to you in writing. That order is the whole difference between a job done once and a job done twice.
Leave it as it is and the same codes come back on the next report - only now you've paid for two inspections instead of one.
Book an electrician before a small fault becomes a big one
020 7123 9361What a Consumer Unit Upgrade in London Involves
Consumer unit upgrade jobs in London worry people for one reason: they picture the whole flat being pulled apart. It's rarely that. A consumer unit is simply the distribution board holding your main switch and the protective device for each circuit - the grown-up replacement for the old fuse box - and swapping one is a contained, well-rehearsed piece of work.
The part that decides everything is the pre-upgrade circuit testing. Before a price exists, every circuit gets tested at the existing board: insulation resistance, earth continuity, polarity, what's actually connected to what. That's how we find the borrowed neutral between two lighting circuits, the spur nobody documented, the earth that stops halfway down the hall. Skip that stage and you're guessing at somebody else's wiring with a chequebook.
Then the protection itself. A 30mA RCD disconnects the supply within milliseconds when current leaks to earth, which is the measure standing between a tenant and an electric shock - and absent RCD cover on socket and bathroom circuits is the single most common route from an unsatisfactory report to a board change. Give each circuit its own RCBO and a fault on the ring final circuit trips that circuit alone, instead of taking out half the board and defrosting the freezer. An AFDD reads the current signature of arcing at a loose connection before that heat turns into anything worse. An SPD shunts transient overvoltage away from your wiring and everything plugged into it.
The reasons people book differ wildly: remedial work behind a failed inspection, evidence for a licence, a kitchen refit that needs more circuits than the board can carry, a scorched breaker spotted at a check-in. Where testing shows the cabling itself is finished rather than the board, we say so and price our electrical rewiring service honestly instead of burying it inside a board change.
You get the test results, a written price, the work itself, and the Electrical Installation Certificate that certifies it. That's the real shape of consumer unit upgrade London work - mostly routine, occasionally a can of worms, never a guess.
Boards don't improve while you think about them; they just get discovered by someone else's inspector first.
How a London Fuse Box Replacement Runs, Start to Finish
It starts on the phone, not on site. We ask what the property is, how many circuits are on the existing board, whether there's a report with codes on it, and what deadline you're working to. That conversation decides whether an engineer needs half a day or a full one, and it's why our quotes don't wobble later. Same-day appointments can usually be arranged if a deadline has crept up on you.
On site, the first job is proving what the supply can take. A maximum demand assessment with diversity applied confirms the tails, main switch and incoming supply will carry what you're asking of them - there's no point fitting a bigger board to a supply that can't feed it. Where the cut-out or meter tails belong to the network operator, that's flagged before we start, because supply isolation and the DNO cut-out are not ours to touch on a whim.
Then safe isolation, properly: isolate, lock off, prove dead with a voltage indicator that's been checked against a proving unit, and only then does anyone open anything. A board that keeps tripping gets traced circuit by circuit before we price a thing - you shouldn't be typing "24 hour electrician" or "emergency electrician near me" into your phone at midnight, which is what our emergency electrician call-outs exist to prevent.
The new board goes on with an RCBO per circuit wherever the installation allows it. One RCBO watches earth leakage and overcurrent on its own circuit, so a failing immersion heater trips the immersion heater - not the lights, the alarm and the fridge at three in the morning. Split-load dual RCD arrangements still have their place on tight budgets, and we'll tell you plainly which one your property justifies.
Earthing and bonding get sorted at the same visit: main earthing terminal, main protective bonding to the incoming metallic services where it's missing or undersized. Then every RCD gets trip-time tested, every circuit is retested live, and the board gets labelled properly so the next person can read it.
Paperwork follows, notification included. Book it in a quiet week rather than the week the inspector is due, and the whole thing costs you less stress and no rescheduled tenancy.
When Landlords Book Our London Consumer Unit Upgrade Service
Three situations account for most of the fuse board upgrades we're asked to quote. None of them improve on their own, and two of them arrive with somebody else's deadline attached.
Total power loss in the property
"No electricity in the whole house." "Main fuse blown." It's the call that can't wait, and the honest answer is that it could be several things: the main switch or an RCD may have tripped on a fault inside the installation, it could be a network outage or a blown supplier cut-out fuse on the incoming side rather than your wiring at all, or a failed main switch, meter or tails connection. Guessing between those in the dark is how people end up paying twice - what to do when the whole property loses power is a diagnosis job, and if the board itself has failed, it's a replacement rather than a repair.
HMO and property licence work
Councils asking for a current satisfactory report before they'll grant or renew a licence is now routine across London, and shared-house loads are rarely what the original installation was designed for. Layouts change, sockets multiply, and cooking happens on three floors instead of one. There's also the AFDD question: arc fault detection is expected on socket circuits in certain higher-risk premises, HMOs among them, under the wiring regulations as they now stand - a decision best taken at the board change rather than retrofitted afterwards. If your electrical requirements for an HMO or licence application are the reason you're reading this, the board is usually the biggest single item on the list.
"The surveyor says it needs rewiring"
Sometimes that's true. Original rubber or lead-sheathed cable still in service, lighting circuits with no earth at all, or a patchwork of part-rewires that never touched the oldest runs - those need honest answers, not a new board bolted over the top. Often, though, the test results say the cabling is sound and it's the board that's failing, so a new consumer unit deals with it for a fraction of the cost. Either way, whether a property actually needs rewiring is decided by test results, not by the age on the deeds.
Every one of these gets worse and pricier the longer it sits - and inspectors, tenants and licensing officers all tend to arrive at once.
Send us your unsatisfactory EICR for a remedial quote
020 7123 9361Consumer Unit Upgrade Near Me: The Boards Behind London Front Doors
Search "consumer unit upgrade near me" from a Victorian conversion in North London and the job on the other end of it is fairly predictable. Two flats, one meter cupboard, a board per unit added at different decades, and lighting circuits that were never earthed hiding behind perfectly modern light fittings. The board swap is the easy half; sorting out which circuit belongs to which flat is what takes the time, and it's why a proper price only exists after testing.
Post-war and ex-council blocks across East London and South East London throw up the other classic. Original boards, no RCD, and a landlord duty that has only recently brought the flat into the inspection cycle - so the first report lands and the board fails on protection alone. Those are straightforward jobs when access to the riser and the incoming supply is arranged in advance, and miserable ones when it isn't.
One thing worth knowing about older installations: a plastic board in an under-stairs cupboard was normal once. Since January 2016 the wiring regulations have required a domestic board to be in a non-combustible housing, so a metal consumer unit enclosure is what replaces it - not a style choice, a fire-containment one. On flat conversions and small commercial units above shops, that's often the observation that tips a report from tolerable to unsatisfactory.
Sort the board while the property is empty between tenancies. Doing it around a tenant, a fridge and a work-from-home setup costs everyone more than it needs to.
Comparing Electricians for Your Board Change?
Take your time - the decent ones expect you to. Book an inspection and you'll get the circuits tested, every code explained in plain English, and a clear written quote for the fuse board upgrade before anyone commits to anything. Bookings are taken 24/7, and a same-day appointment is often possible if your deadline is nearer than you'd like.
New Fuse Box London: The Questions Landlords Ask
How do I know if my fuse box needs upgrading?
Look at what's actually in it. Rewireable fuse carriers, no residual current protection, a plastic housing, or a board an inspector has already written observations against - any one of those puts you in the queue. It's normally the largest single line behind an unsatisfactory report, because protection can't be bolted onto a board that was never designed to carry it. If you're already unsure, that uncertainty is the answer.
Is my old fuse box still legal to use?
An old board isn't automatically illegal. What happens is that it gets assessed against today's standard during an inspection and coded accordingly - C1 where danger is present, C2 where it's potentially dangerous, C3 as an improvement recommendation. Absent RCD protection on sockets and bathrooms is now expected rather than optional, so old boards tend to attract codes that a landlord has to clear anyway. Legal today, unlettable next month, is a real position to end up in.
What should I look for when choosing an electrician?
Ask for their competent person scheme registration and qualifications, ask to see a sample report, check they carry insurance, and insist on a written scope before anyone starts. Our engineers hold the qualifications the work requires, and we'd rather you asked those questions than didn't - the traders who dodge them are the reason so many second opinions get booked. You can see the rest of our London electrical safety services if the board turns out to be one item on a longer list.
How long does a fuse box replacement take, and will the power be off?
A straightforward flat or terrace is generally a day's work, longer where circuits need splitting, earthing needs upgrading or the supply has to be dealt with. Power goes off for the working part of that day, which is why an empty property between tenancies is the cheapest slot you'll ever get.
What paperwork do I get afterwards?
An Electrical Installation Certificate for the new board, confirming it was designed, installed, inspected and tested to the current wiring regulations, plus the Building Regulations compliance paperwork covering notification under Part P. That's what your letting agent, your council and any future buyer will ask to see - and chasing it retrospectively is far harder than having it issued at the time.