Every property is different, but these rough guides give you an idea of common costs in Croydon, Wallington, Sutton and surrounding areas:

• Replace existing light fitting: from £70–£90
•  
• Fit new ceiling light (no wiring changes): from £80–£110
•  
• Replace existing single socket with double: from £80–£100
•  
• Install new double socket on existing circuit (surface or easy access): from £110–£140
•  
• Replace standard light switch: from £70–£90
•  
• Replace with dimmer switch: from £80–£110 (plus
•  cost of dimmer)
•  
• Fault finding / loss of power (first hour on site): £80–£90, then £60–£70 per hour thereafter
•  
• Small job bundle (multiple minor tasks in one visit, up to 2 hours): from £140–£160
•  
• EICR (1–2 bed flat): from £150
•  
• EICR (3–4 bed house): from £180–£220
•  
• Replace like‑for‑like extractor fan (bathroom/kitchen, existing wiring): from £90–£130
•  
• Fit mains‑powered smoke or heat alarm (on existing circuit): from £80–£120 each (discount for multiples)
•  
• Outdoor security light replacement (existing wiring): from £90–£130
•  
• New outdoor light point (short run from existing circuit): from £130–£180
•  
• Electric shower replacement (same rating, existing cabling & isolator): from £180–£250
•  
• Cooker / hob connection (existing circuit): from £80–£120
•  
• Consumer unit / fuse box replacement in typical 1–3 bed home: from £600–£750 including testing & certification
•  
• EV charger installation (standard install, short run): from £800–£1,100 including testing & notification
•  
• Full rewire 1–2 bed flat: from £3,500–£4,500 (subject to survey)
•  
• Full rewire 3 bed house: from £5,500–£7,000 (subject to survey)

These are guideline prices only. Final costs depend on the condition of your existing wiring, access, specification and any extra work required to bring the installation up to current regulations.