A wet room can make a compact bathroom feel larger, provide easier access for every generation of the household and create a clean, contemporary finish. However, the wet room installation cost is shaped by far more than the choice of tiles and shower screen. Proper drainage, tanking and preparation beneath the finished surface are what make the room safe, watertight and dependable for years to come.
For homeowners in Burgess Hill, Haywards Heath and the surrounding Sussex area, a professionally installed wet room will commonly cost more than a straightforward bathroom refresh. That extra investment is usually in the parts you cannot see once the work is complete: preparing the floor, forming the correct fall to the drain, protecting walls and floors from moisture, and making sound plumbing alterations.
Typical wet room installation cost in Sussex
As a broad guide, a modest wet room conversion in an existing bathroom may start from around £7,000 to £10,000 where the layout remains largely unchanged and the room is straightforward to prepare. A more comprehensive installation, including new sanitaryware, quality finishes, drainage changes and full waterproofing, will often fall between £10,000 and £18,000.
Larger rooms, premium fixtures, bespoke glass, underfloor heating, complex pipework changes or accessibility adaptations can take the overall figure beyond £20,000. These are planning figures rather than fixed prices. Every property has different floor construction, plumbing routes and finishing requirements, so an accurate quotation should follow a proper survey.
The lowest quote is not always the best value. A wet room needs careful work at every stage, and cutting corners on waterproofing or drainage can lead to leaks that affect adjoining rooms, ceilings and the structure below. A well-planned installation protects the property as well as improving daily comfort.
What affects wet room installation cost?
The existing bathroom layout
Keeping the shower, basin and WC in roughly their current positions can reduce labour and material costs. Moving a soil pipe, extending hot and cold supplies or relocating waste pipes may require lifting floors, opening walls or working around structural elements.
This does not mean a new layout is off the table. Repositioning the shower can transform how a small room works, particularly where a bath is being removed. It simply needs to be considered early, before tiles and fittings are chosen, so the design and budget remain realistic.
Floor construction and drainage
Creating a reliable fall towards the shower drain is one of the defining elements of a wet room. Water must flow efficiently to the waste without pooling in corners or travelling towards the doorway.
The work required depends on whether the bathroom has a timber suspended floor or solid concrete floor. Timber floors may need strengthening and careful boarding before the waterproof layer is applied. Concrete floors can need forming or cutting to accommodate the drain and correct gradient. If the existing waste run lacks sufficient fall, the solution may involve more extensive plumbing work.
A good-quality linear drain or central floor drain is not just a visual decision. Its position affects floor levels, tiling, cleaning and how comfortably the room functions every day.
Waterproofing, also called tanking
A wet room should be treated as a fully waterproofed space, not simply a shower area with tiles. Tiles and grout are not a waterproof barrier on their own. Behind them, professional installers use a tanking system that seals the relevant floor and wall surfaces, including corners, joints and pipe penetrations.
The exact extent of tanking will depend on the room design, but it is particularly important around the showering area and across the floor. This work takes time and must be completed correctly before finishes are installed. It is one of the strongest reasons to choose an experienced bathroom installer rather than judging a project purely on its headline price.
Tiles and finishing materials
Tile costs vary considerably. A practical ceramic tile can provide an attractive, hard-wearing result, while large-format porcelain, natural stone or intricate patterned tiles may increase both supply and fitting costs.
Large tiles can make a room look calm and spacious, but they are not always the simplest option for a shower floor. Smaller tiles or mosaic sheets can follow the floor falls more easily and offer additional grip underfoot. Natural stone may need sealing and ongoing care. The right choice balances appearance, maintenance, safety and the layout of the drain.
Finishes also include grout, trims, niches, mirrors, lighting, extraction and decoration. Individually these may seem like minor choices, but together they have a noticeable effect on the final investment.
Sanitaryware and shower fittings
A wet room can be fitted with a simple thermostatic shower, wall-hung basin and close-coupled WC, or specified with concealed valves, digital controls, a rain shower, vanity furniture and a frameless glass panel. There is no single correct specification.
It is worth prioritising quality where it affects everyday reliability. A dependable shower valve, suitable waste system and well-made taps can make a real difference to long-term use. Decorative upgrades can then be selected around the budget available.
Ventilation, heating and electrical work
Managing moisture is essential in any bathroom, especially one designed for open showering. An appropriately sized extractor fan, correctly ducted to the outside, helps reduce condensation and supports the life of finishes and fittings.
Many homeowners also choose electric underfloor heating or a heated towel rail. These additions improve comfort and can help the room dry more quickly, but they require safe electrical installation and should be allowed for from the start. Recessed lighting, illuminated mirrors and shaver points may also require an electrician, depending on the existing installation and bathroom zones.
Where should you spend, and where can you save?
The sensible place to invest is in the preparation that protects the home: drainage, floor construction, tanking, ventilation and competent plumbing. These are difficult and disruptive to put right after a room has been tiled.
Savings can often be made through careful product selection. Choosing a well-made standard-size shower screen instead of bespoke glass, retaining a workable layout, and selecting attractive mid-range tiles can keep a project under control without compromising the installation itself. A smaller tile feature area can also deliver personality without tiling every wall in a premium material.
Be cautious about changing your mind once work is underway. Late changes to the drain position, tile format or concealed shower controls can affect programme, materials and labour. A detailed design before work starts is one of the best ways to avoid unexpected expense.
Is a wet room right for your home?
Wet rooms work particularly well in en-suites, smaller bathrooms and homes where future accessibility is a consideration. With a level-access shower area, they can remove the step over a bath or raised shower tray. They are also easier to clean when designed with sensible storage and good drainage.
There are trade-offs. In a very small room, shower spray may reach more of the space, so a fixed glass panel or carefully planned screen can be worthwhile. Families who rely on a bath for young children may prefer to retain one elsewhere in the property. The key is choosing a layout that suits how your household actually uses the bathroom, rather than following a trend.
Getting a useful quotation for a wet room installation
A reliable quotation should set out the scope of work rather than offering one unexplained figure. It should make clear what is included for removal of the old bathroom, plumbing changes, drainage, tanking, tiling, sanitaryware fitting, electrical work, waste disposal and final finishing.
Before requesting quotations, think about your priorities: whether accessibility matters, which fittings you would like to retain or replace, and whether you want the installer to supply products. Photographs and room measurements are helpful for an initial conversation, but an on-site assessment is the best way to identify issues such as uneven floors, limited waste routes or hidden water damage.
Turner Plumbing & Heating approaches bathroom projects as complete installations, with the plumbing, heating and finishing details considered together. That joined-up approach helps ensure the finished room is not only attractive, but practical for everyday use.
A wet room should feel effortless once it is complete: warm underfoot, easy to maintain and free from concerns about water going where it should not. Taking time to plan the unseen work is what gives you that confidence long after the tiles have been fitted.