No outlet behind the sofa, need one more point in the kitchen for the coffee machine, or a socket in the bathroom for the washing machine — a common headache. Extension leads and adaptors only solve it for a while, and they can overload the wiring and add danger. The right answer is a new socket installation. But this is electrical work: you need to understand cable sizes, connect everything properly to the consumer unit, provide earthing and comply with regulations. In flats on Mokotow, houses in Bielany, new builds on Wilanow — the wiring differs from one generation to another, and each flat needs its own solution. If you are not sure with electrics, don’t chance it — call a professional.

How much does it cost and what affects the price

The price depends on the type of installation (surface or flush mount), whether the wall has to be chased, if new cable needs to be run, and how far the point is from the consumer unit. A straightforward back-box replacement and socket install is fast. A complete installation from the board, with cable routing, wall chasing and patching, takes more time. Up-to-date rates for all electrical work are shown in the table below. The socket and back box are provided by the client; fixings are included.

How the installation works

1. Inspection: we choose the location, scan the wall for existing cables and check the load on the circuit.
2. Isolating the supply: we turn off the relevant circuit at the board and confirm the line is dead with a voltage tester.
3. Chasing (if needed): we cut a channel for the cable and a recess for the back box using a wall chaser or SDS drill with a core bit.
4. Cable routing: we run a cable of the correct size (usually 2.5 mm² for domestic sockets) from the consumer unit or the nearest junction box.
5. Fitting the back box: we bed it into the wall with plaster, making sure it sits level.
6. Wiring: we strip the cables, connect live, neutral and earth to the socket mechanism, and make sure all terminals are secure.
7. Testing: we power the circuit back on, check voltage with a multimeter and test the socket under load.

Common mistakes

• Connecting to an undersized circuit — 1.5 mm² cable is not meant for high-draw appliances and may overheat.
• No earth connection — dangerous, especially in wet rooms.
• Chasing a load-bearing wall without permission — this can affect the structure and lead to problems with building management.
• Joining wires with twist connections instead of proper terminals — the connection works loose over time and heats up.
• Fitting a standard socket in a bathroom — a splash-proof unit with a cover (IP44 or above) is required.
• Not checking the circuit load — too many appliances on one circuit will trip the breaker.
• Plastering over the chase before testing — if the cable was damaged during chasing, the wall has to be opened up again.

Warning: electrical work can be life-threatening if done wrong. Bad connections may lead to short circuits, fires or electric shock. If you are not a qualified electrician, do not try to do it yourself.

What to prepare before the visit

• Decide exactly where the socket is needed — at what height and on which wall.
• Buy the socket and back box (if you already know the range and colour) — or leave the choice to the technician.
• Check where the consumer unit is and whether there are spare breaker slots.
• If the socket is for a high-power appliance (air conditioner, boiler), mention it in advance — a dedicated circuit is required.
• Clear the wall area — move furniture, pictures and shelves at least a metre away.
• If the wall is tiled or has decorative plaster, tell us — chasing needs extra care.
• Make sure there is access to the consumer unit.
• Keep in mind: chasing makes dust — cover or move items within a 2–3 metre radius.

A real case from Warsaw

We got a call to a flat on Mokotow. The owners had put an electric fireplace in the living room, but the nearest socket was 4 metres away, so they were powering it through an extension lead. The fireplace draws 2 kW and the extension was heating up. We ran a dedicated 2.5 mm² cable from the consumer unit, chased the wall, installed a back box and fitted an earthed socket beside the fireplace. It was connected through a separate 16 A breaker. We tested it under load — everything worked properly, the cable stayed cool and the breaker held. The chase was filled with plaster and the surface was made ready for painting. The whole job took about 3 hours (compatible with Legrand, Schneider Electric, ABB and similar).

Frequently asked questions

Book the installation

We install sockets across Warsaw — flush and surface mount, domestic and heavy-duty, with earthing and protection. We come with tools and supplies. Get in touch — we’ll add the power points you need in a single visit.