Plan the sockets before the plaster goes on

The single biggest regret in most loft conversions is not the paint colour or the carpet — it's the socket that isn't there. Once plasterboard is up, ceilings are skimmed and insulation is packed into the rafters, adding a socket means cutting into a finished wall, chasing cable through a fire-rated ceiling and repainting the whole run. It is messy, expensive and always more disruptive than it sounds.

So the electrical plan should be drawn up at the same time as the layout, before the first fix. Sit down with your electrician while the studwork is still open and walk the space room by room. Mark on the floor plan where the bed will go, where the wardrobe doors swing, where a desk might sit and where you'd plug in a lamp. Even if furniture will change, that conversation forces you to think about traffic routes and reach.

How many sockets is actually enough?

Loft rooms are often bedrooms, home offices or snug living spaces, and each has a different appetite. A reasonable starting point for a double bedroom is:

• Bedside: two sockets each side, plus a lighting point. Phone chargers and a lamp alone account for both.
• Wardrobe or dressing area: one socket, useful for a hairdryer or a charging station.
• Desk or study corner: four sockets. Laptop, monitor, printer, lamp and a phone will happily fill them.
• TV or media point: four sockets plus a coaxial and data point, so streaming boxes and games consoles aren't fighting over one strip.
• Eaves storage: one socket for a router, a dehumidifier or a vacuum charger.
• General: a spare pair on the most sheltered wall, because something always turns up.

USB-C sockets with 30W output are now genuinely useful rather than a gimmick, and they cut down on plug adaptors cluttering the bedside. It's also worth adding a fused connection unit if a shower pump, extractor fan or small boiler is going in the loft — those need a fixed supply, not a trailing plug.

Where to put them in a loft room

Loft geometry is the thing that catches people out. Sloped ceilings and knee walls mean the conventional 300mm-from-floor position may land you on a wall only 400mm high. In practice:

• Set sockets at 300mm from the floor on full-height walls, which keeps cables tidy behind furniture.
• On knee walls, mount sockets at 150–200mm so they clear the top of any eaves boxing and still fall below your skirting line.
• Switches should sit at 1400mm on the wall you naturally approach — usually the one beside the door, on the hinge side.
• Keep sockets off the insulated external gable by at least a little, so the back box isn't buried in insulation.
• Consider a floor socket or a socket in a deep window reveal if a desk will face a view.

Two-way switching on the stairs is non-negotiable, and a switch by the bed for the main light saves a lot of night-time stumbling.

Lighting in layers, not one lonely pendant

Loft ceilings are often low, and a central pendant can feel like it's aiming for your head. Layered lighting solves this beautifully: ceiling downlights or a slim surface fitting for general light, wall lights for a warmer ambience, and a specific task light over a desk or dressing table.

Choose fire-rated downlights if the ceiling is a fire-resisting element — common in conversions and essential in flats. Use dimmable LED fittings from the same batch to avoid colour and flicker mismatch, and check the dimmer is compatible with the driver. A warm 2700K for bedrooms, 3000–4000K for a study, works well.

Don't forget practical points: an interlinked mains smoke alarm on the landing or inside the room, a light in the eaves storage, and a pull cord or low-level switch if the loft is at the top of a steep stair.

Cable routes, insulation and regulations

Loft insulation is the enemy of cable. Covering a cable in thermal insulation reduces its current-carrying capacity, sometimes by half. Your electrician should run cables above the insulation, clip them clear, or enclose them in conduit, and may need a larger cable size to compensate. Grouping several cables together has a similar effect.

All of this work falls under Part P in England and Wales, so it must be designed and tested to BS 7671 and notified where required. Use a registered electrician, ask for the test certificate, and check the consumer unit has spare ways for future circuits.

Future-proofing while the ceiling is open

Once the space is finished, you won't get another chance cheaply. While the boards are off, run a spare draw cord or a length of conduit from the loft to the consumer unit or landing. Pull coaxial, Cat6 or fibre to any TV position, and consider wiring for a wall-mounted air conditioning unit or ceiling fan, both of which need a dedicated supply. A little forward thinking now means no extension leads snaking across the floor later — just a loft room that quietly does everything you ask of it.