Small Bathroom Renovation Ideas for Hong Kong Flats

Small Bathroom Renovation Ideas for Hong Kong Flats

The average bathroom in a Hong Kong flat measures just 25 to 40 square feet — about the size of a king-sized bed. In nano flats and subdivided units, it can be even smaller. Yet this tiny space must accommodate a toilet, sink, shower, and storage for toiletries and cleaning supplies. A poorly planned bathroom renovation can make a small space feel claustrophobic, while a clever one can make it feel surprisingly spacious. Whether you are renovating a bathroom in a private residential flat in Taikoo Shing, a village house in Yuen Long, or a public housing unit, these ideas will help you make the most of your limited square footage.

Wall-Hung Toilets: The Single Best Space Saver

If you make only one upgrade, consider a wall-hung (wall-mounted) toilet. Unlike traditional floor-standing toilets, wall-hung models are fixed to a steel frame concealed within the wall, with the cistern hidden behind a false panel. The benefits are significant:

• Free floor space — With no pedestal base, you gain roughly 1 to 1.5 square feet of visible floor area. In a 30 sq ft bathroom, that is a noticeable difference.
• Easier cleaning — No awkward gap behind the toilet base where grime and mould accumulate in Hong Kong's humid climate.
• Adjustable height — The bowl can be set at your preferred height during installation, which is a bonus for elderly family members.
• Modern appearance — Wall-hung toilets look sleek and create a sense of visual openness.

Popular brands available in Hong Kong include TOTO (widely available at their showroom in Wan Chai and through authorised dealers), Duravit, and Kohler. Budget around HK$5,000–15,000 for the toilet and concealed cistern frame, plus HK$3,000–6,000 for installation. The installation requires building a false wall to hide the frame, which adds approximately 8–10cm of depth, so it works best on walls that can accommodate this.

Sliding and Pocket Doors

A standard bathroom door swinging inward eats up about 6 to 8 square feet of usable space. In a tiny bathroom, that is a huge percentage of the total area. Two alternatives work well:

• Sliding barn-style door — Mounted on a track above the door frame, it slides along the external wall. This is the easier retrofit option as it does not require modifying the wall cavity. A basic aluminium-frame sliding door with frosted glass costs HK$2,000–5,000 installed.
• Pocket door — Slides into a cavity within the wall, completely disappearing when open. This is the most space-efficient option but requires building a double-stud wall, which can be challenging in Hong Kong concrete-walled buildings. It is more practical during a full renovation.

Wet Room Design

Many Hong Kong bathrooms are already essentially wet rooms — the shower is not separated from the rest of the bathroom by a screen or tray. Embracing this design intentionally, rather than fighting it, can actually make your bathroom feel larger and more cohesive:

• Ensure the entire floor is properly waterproofed with a cementitious membrane system, extending at least 150mm up the walls.
• Install a linear drain along one wall instead of a central drain — this allows for a single, clean slope gradient and looks more modern.
• Use the same floor tile throughout the entire bathroom to create visual continuity. Large-format tiles (300x600mm or larger) with minimal grout lines make the space feel bigger.
• If you want some separation, consider a frameless glass panel (not a full shower screen) positioned to keep the toilet area dry. A single fixed glass panel costs HK$2,000–4,000 installed.

Smart Storage Solutions

Storage is the perpetual challenge in small Hong Kong bathrooms. Here are proven solutions:

• Recessed wall niches — Built into the shower wall during renovation, these provide shelf space without protruding into the room. A typical niche measuring 30cm wide by 60cm tall and 10cm deep can hold shampoo bottles and soap. Cost: HK$500–1,500 to construct, depending on the wall material.
• Mirror cabinet — Replace a flat mirror with a mirrored cabinet above the sink. You gain hidden storage for medications, skincare products, and razors while maintaining the mirror's function. Models from IKEA (Causeway Bay or Sha Tin), Towel Rack Man in San Po Kong, or bathroom shops in Lockhart Road start from HK$500.
• Above-toilet shelving — The wall space above the toilet is often wasted. Install a slim shelf unit or open shelves to store towels, spare toilet rolls, and cleaning products. Use stainless steel or powder-coated metal to withstand humidity.
• Shower caddies with suction or adhesive mounts — These avoid drilling into waterproofed walls and can be repositioned as needed.
• Towel ladder or rail behind the door — Hang a slim towel ladder on the back of the door or on the wall behind it, utilising space that would otherwise be empty.

Space-Saving Fixtures

Beyond the wall-hung toilet, several other compact fixtures can make a real difference:

• Corner sink — A triangular or D-shaped basin that fits into a corner frees up wall space for other uses. Compact corner basins start from HK$800.
• Narrow-depth vanity — Standard vanities are 45–50cm deep. Slim models at 25–35cm depth provide a basin and some under-sink storage without dominating the room.
• Compact shower mixer — A thermostatic shower mixer with a built-in diverter eliminates the need for a separate shower column, saving wall space. Brands like Grohe and Hansgrohe offer slim models specifically designed for small bathrooms.
• Tankless water heater — If your bathroom still has a bulky tank-type water heater, replacing it with a slim, wall-mounted instantaneous heater (such as TGC or Rinnai, widely available in Hong Kong) frees up significant space.

Visual Tricks to Enlarge the Space

Perception matters as much as physical dimensions in a small bathroom:

• Use light-coloured tiles — whites, creams, and pale greys reflect more light and make the room feel open.
• Install a large mirror — extending a mirror across the full width of the vanity wall doubles the perceived depth of the room.
• Use consistent materials — avoid too many different tile patterns or colours, which visually fragment the space.
• Opt for wall-mounted taps — taps that come out of the wall above the basin, rather than from the basin itself, create a cleaner look and make the basin easier to clean.
• Ensure good lighting — a well-lit bathroom feels larger. Combine ceiling downlights with a backlit mirror for even, shadow-free illumination.

Budget and Timeline

A small bathroom renovation in Hong Kong typically costs HK$40,000–100,000, depending on the scope. A basic refresh (new tiles, new fixtures, repainting) starts around HK$40,000–55,000. A full renovation including waterproofing, layout changes, wall-hung toilet, and custom vanity ranges from HK$70,000–100,000 or more. Most small bathroom renovations take 10 to 20 working days. Always get at least three quotations from licensed contractors, verify their references, and ensure the quote includes proper waterproofing — cutting corners on waterproofing in a Hong Kong bathroom will inevitably lead to seepage problems that cost far more to fix later.