What does a new bathroom design cost in Somerset?
Design has no separate fee on a supply-and-fit job. A complete fitted bathroom in Somerset typically costs £6,600–£12,250 including VAT.
Survey and layout
- Written, itemised quote
Detailed design
- Elevations and tile layouts
Full project
- One contract and one team
Guide prices for Somerset including VAT. Your itemised written quote after the free survey is the price that counts.
Which towns do we cover in Somerset?
Most of Somerset has hard water. We plan easy-clean glass, rimless toilets and finishes that do not show limescale. Hardness varies street by street, so check the figure for your postcode with your water supplier. A design survey in Bath covers drainage, supplies, electrics and ventilation, so nothing on the drawing is guesswork.
What the job includes
- A clear view of which changes are cheap and which mean moving drainage or opening floors
- A measured survey of the room, including ceiling heights, slopes, window and door positions and any boxing
- Elevations and tile layouts on a design, supply and fit project, so the setting-out is agreed before tiling starts
- Layout options drawn to scale, showing the bath or shower, WC, basin, storage and towel rail
- Checks on the soil stack, waste routes, joist direction, water pressure, hot water system and existing electrics
- A conversation about who uses the room, when, and what does not work about the current one
Decisions to make first
Tile setting-out
Centring tiles on the window, basin or niche avoids thin slivers at the edges. Large tiles mean fewer joints but need flatter walls.
Where the shower goes
A shower on an outside wall is easier to ventilate; one under a sloping ceiling needs full head height where you stand, not just at the high side.
The door
Re-hanging the door on the other side, fitting a sliding pocket door or moving the opening can free up a whole wall in a small room.
Keep or change the layout
Keeping the WC and shower where they are saves on plumbing. The WC is the costly one to move, because it is tied to the soil stack.
Rules that apply in England
Changing the layout inside an existing bathroom does not need planning permission. The design does have to respect the electrical zones around the bath and shower under BS 7671, the water fittings rules for new WCs and taps, including a maximum 6-litre flush, and adequate extract ventilation. Listed buildings need listed building consent for alterations affecting their character, including new soil or vent pipes through walls, and in a flat the lease often requires freeholder consent for moving the WC or adding a new vent.
In England, a new connection to the soil stack or new drainage can be building regulations work under Part H, and new circuits or alterations to circuits in the bathroom are notifiable under Part P. Where a new bathroom is formed, Approved Document F asks for extract at 15 l/s intermittent or 8 l/s continuous.

