Shower Installation Cost London 2025 — Types, Prices and What to Expect

Shower Types and Installation Costs in London

Electric Shower (Instantaneous)

An electric shower heats water directly from the cold mains supply — it does not need the boiler to be running and does not draw from the hot water cylinder. This makes it ideal as a second shower in a property, or in properties with a combi boiler where simultaneous hot water draw causes pressure drops.

• Supply and installation (London 2025): £200-450 including electrician for the dedicated circuit
• Key requirements: Dedicated electrical circuit from the consumer unit (cannot share with other circuits); a Part P-certified electrician must install or certificate the electrical work; adequate cold mains pressure (minimum 1 bar)
• Popular models: Mira Sport, Triton T80, Aqualisa Aquastream — 8.5kW to 10.8kW rating (higher kW = hotter at higher flow rates)

Thermostatic Bar Valve (Exposed)

A thermostatic bar valve mixes hot and cold water from your existing plumbing and maintains a set temperature. The "exposed" version has the pipework and valve visible — the most common type for over-bath and shower cubicle installations.

• Supply and installation: £350-700 including plumber and basic shower enclosure
• Key requirements: Balanced hot and cold supply pressures (either both gravity, or both mains). Unbalanced supply (one mains, one gravity) causes temperature fluctuation. In London properties still on gravity-fed systems, a thermostatic valve requires either a pump or supply balancing.
• Popular models: Hansgrohe Croma Select, Grohe Grohtherm, Mira Platinum

Thermostatic Concealed Valve

The valve is fitted inside the wall with only the control knobs and the outlet (shower head, body jets, bath filler) visible. Premium aesthetic; used in higher-specification London properties.

• Supply and installation: £700-1,500 including tiling to cover pipework
• Requirements: Wall must be suitable for in-wall fitting (solid walls or correctly supported stud walls); balanced supply pressures; access panel or provision for future valve access

Wet Room

A fully waterproofed bathroom where the shower has no screen or tray — water drains from a linear or central drain in the floor. High-end specification increasingly common in London conversions and HMOs being renovated to attract professional tenants.

• Full wet room installation: £2,000-5,000+ depending on size, tile specification, and whether the floor structure needs strengthening for the drain
• Requirements: Floor waterproofing system (tanking) installed before tiling; adequate fall toward drain; adequate waste pipe below-floor drainage; structural engineer sign-off if floor joists are being modified

London-Specific Considerations

• Hard water: Install a shower head filter or in-line scale reducer to prevent shower head calcification. Unfiltered London water reduces shower head flow by 30-50% within 12 months in hard water postcodes.
• Gravity-fed systems: If the property still has gravity cold (loft tank), shower performance will be poor without a pump. A negative head pump boosts both hot and cold supplies to the shower to provide adequate pressure.
• Ventilation: Building Regulations require mechanical ventilation in bathrooms without windows, or where the window is too small. Shower installation triggers this requirement — an extractor fan running at minimum 15 litres/second must be fitted.