Residential space
Bathroom Interior Design
Specification
Dimensions and
what goes in
Key dimensions
- Total length
- 2400 mm
- Total width
- 1800 mm
- Ceiling height
- 2700 mm
- Shower area
- 900 × 1200 mm
- Vanity depth
- 600 – 750 mm
- WC area width
- 700 – 900 mm
Layout principles
- Dry and wet zones separated
- Space-saving layout for a Mumbai flat
- Ventilation and lighting planned together
- Niche storage instead of surface clutter
- Falls and waterproofing set before tiling
Wash basin and counter
- Counter height
- 850 – 900 mm
- Counter width
- 600 – 1200 mm
- Counter depth
- 450 – 600 mm
- Basin size
- 400 – 600 mm (W)
- Basin height
- 120 – 180 mm
- Counter finish
- Quartz / granite / marble / solid surface / ceramic
- Basin type
- Above counter / under counter / wall hung
Vanity cabinet
- Length
- 600 – 1200 mm
- Depth
- 450 – 600 mm
- Height
- 400 – 600 mm
- Material
- Plywood / MDF / waterproof board
- Finish
- Laminate / acrylic / veneer
- Storage
- Drawers / open shelves / hidden compartments
Mirror
- Width
- 600 – 1000 mm
- Height
- 800 – 1200 mm
- Depth
- 20 – 30 mm
- Type
- LED backlit / framed / frameless
- Finish
- Silver / black / bronze frame
- Extras
- Anti-fog (optional)
WC
- Seat height
- 400 – 450 mm
- Rough-in, wall hung
- 180 / 230 mm
- Projection
- 520 – 580 mm
- Flush plate height
- 1000 – 1200 mm
- Type
- Wall hung / floor mounted
- Flush
- Dual flush / single flush
- Seat
- Soft close recommended
Shower area and glass
- Shower area
- 900 – 1200 mm
- Glass height
- 2200 mm
- Glass thickness
- 8 – 10 mm toughened
- Shower head height
- 2000 – 2100 mm
- Mixer height
- 900 – 1100 mm
- Door type
- Hinged / sliding / fixed panel
- Hardware
- SS 304 / matte black
- Glass
- Clear / frosted / fluted / smoked
Taps and fittings
- Basin tap height
- 100 – 150 mm
- Basin tap reach
- 120 – 180 mm
- Hand shower holder
- 1200 – 1600 mm
- Rain shower head
- 200 – 300 mm dia
- Material
- Brass / stainless steel
- Finish
- Chrome / matte black / brushed nickel
Niche
- Width
- 300 – 450 mm
- Height
- 300 – 600 mm
- Depth
- 100 – 150 mm
- Finish
- Same as wall / contrast
- Lighting
- LED strip / spot light
Tiles
- Floor
- 600 × 600 / 800 × 800 mm
- Wall
- 300 × 600 / 600 × 1200 mm
- Shower floor
- 300 × 300 mm anti-skid
- Finish
- Matte / glossy / textured
- Common choices
- Beige / grey / white / stone finish
Ventilation and door
- Exhaust fan
- 200 × 200 / 250 × 250 mm
- Fan placement height
- 2200 – 2400 mm
- Door width
- 700 – 900 mm
- Door height
- 2100 – 2200 mm
- Door
- Waterproof flush / PVC / laminate / veneer
- Finish
- Laminate / PU / melamine
What a project here covers
- Wet and dry zoning, and a shower enclosure or screen detail
- Waterproofing specification and fall planning to the drain
- Plumbing point setting-out for every fitting, at real heights
- Sanitaryware and CP fittings selection, matched to the water pressure you have
- Vanity, mirror and storage design in the dry zone
- Ventilation, lighting and a shaver or geyser power plan
What this room has to solve
Water does not go where it should
Falls towards the drain, a properly formed shower threshold and a waterproofing membrane taken up the wall are what keep the rest of the flat dry. Tile choice cannot compensate for any of it.
Storage that gets wet
Open shelving in a wet zone stays damp. Storage belongs in the dry zone, and a mirror unit or under-counter drawer earns its place far more than a niche full of bottles nobody empties.
Ventilation is undersized or absent
In a humid city a bathroom without real extraction grows mould behind the fittings within a year. Exhaust capacity, a run to a shaft or window, and a door undercut for makeup air are all part of the design.
Materials and finishes
- Tile and grout
- Slip rating matters more than pattern on a wet floor. Epoxy grout in the shower zone costs more, does not stain and does not need redoing in three years.
- Waterproofing
- A membrane system taken up the shower wall to a real height, with corners and penetrations detailed. This is the one line in the estimate never worth cutting.
- Fittings
- Chosen against your actual water pressure. A rain shower on a low-pressure line is a disappointment that no amount of finish quality fixes.
What we will ask you
- How many people use this bathroom on a weekday morning?
- Is there a window or a shaft, and how is the room ventilated now?
- Is the water supply from an overhead tank or pumped, and what is the pressure like?
- Is a bath ever going to be used, or would that space be better as a bigger shower?
- Is anyone in the household elderly now, or likely to be using this bathroom in ten years?
In more detail
The parts you never see
Roughly half a bathroom budget goes into things that are invisible the day it is finished: waterproofing, falls, pipe routing, the concealed cistern frame, the extraction duct. That half decides whether the room is still sound in five years. We specify it in writing and check it on site before anything is tiled, because after tiling it cannot be inspected without breaking something.
Zoning a small bathroom
Most flats give you a single small room that has to be shower, WC and basin. The usable version separates wet from dry: shower behind a screen with its own fall, WC and basin outside it, and storage kept entirely in the dry zone. A glass screen instead of a curtain, and a threshold that actually holds water back, are what make a compact bathroom feel like a good one.
Planning for later
Blocking behind the wall for a future grab rail, a shower zone with no step, and a door that opens outward all cost very little at the time and are difficult afterwards. If anyone in the household is likely to need them within a decade, they are worth putting in now.
Talk about your
bathroom
Projects involving this room
Rooms this one usually comes with
Draft wording.This page was written by us from your brief rather than by you. Read it, change anything that is not how you work, and we will set it exactly as you want it.
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