How to fit out a functional 4 m² bathroom – practical layouts with a shower, bath and washing machine

A small space doesn’t have to mean giving up comfort and style. A 4 m² bathroom can be surprisingly functional if you plan its layout and fittings well. How do you fit in everything you need – from a shower to a washing machine? Is it worth going for a bath, or is it better to choose a modern walk-in shower?

In this article, you’ll find concrete tips, tried-and-tested solutions and inspiration for a 4 m² bathroom to help you design a practical, attractive space tailored to your needs.

Small 4 m² bathroom – functional, clever layouts?

Can you create a practical, comfortable space in 4 m²? Absolutely – provided you plan it well. Designing a small 4 m² bathroom calls for clever solutions and smart choices: from the type of fittings, through finish materials, to storage.

Even a small room can accommodate a bath, shower, toilet and basin – and still look contemporary rather than like a storeroom. The key is to match the fixtures to the bathroom layout and choose a style that won’t overwhelm the space.

Designing a 4 m² bathroom with a shower – how to make the most of the space?

Planning to swap the bath for a shower? In a small bathroom, that’s often the best choice. Here are proven ways to maximise the space:

1. Install a corner shower enclosure. Fitting it into a corner frees up more room in the centre of the bathroom. Choose models with sliding doors that don’t need extra swing space.
2. Opt for a walk-in shower. No tray and a clear glass panel visually enlarge the room. A walk-in is also a convenient, elegant solution without thresholds or awkward corners.
3. Choose a linear drain. It replaces a traditional shower tray and allows a perfectly level floor. It’s a modern, hygienic and very practical solution for everyday use.
4. Install a ceiling-mounted rain shower. It saves space and eliminates the need for visible shower arms. It also creates a pleasant home-spa feel.
5. Integrate the shower area with the rest of the bathroom. Avoid hard divisions – use the same tiles across the floor and walls. This will make the room look cohesive and more spacious.
6. Ensure good lighting in the shower area. Discreet LED lighting over the shower adds atmosphere while improving comfort and safety in this zone.

A 4 m² bathroom with a shower can be not only comfortable but stylish too – all it takes is a bit of planning and a few good decisions.

A 4 m² bathroom – a layout with a bath for proper relaxation

You’ve only got four square metres but don’t want to give up your soak? It’s possible! A 4 m² bathroom with a bath requires a thoughtful design, but it can be just as functional as the shower version.

Choose a compact bath 140–150 cm long, ideally a corner or asymmetrical model. That way you’ll free up room for the other elements, such as a basin or cabinet.

A great option is to pair the bath with a shower screen – you’ll get the functionality of a shower without giving up baths. Go for a light colour palette, a large mirror and slimline cabinets – they’ll make even a small bathroom feel more spacious.

For best effect, use the same tiles on the walls and floor to visually enlarge the space.

A 4 m² bathroom with a washing machine – how do you find space for an extra appliance?

Seems impossible? And yet – a 4 m² bathroom with a shower and a washing machine is a genuine option, even in a very tight space. The key is to use every centimetre smartly and choose the right solutions.

Here are a few proven ideas to help you find room for a washing machine without sacrificing comfort:

1. Go for a slim washing machine. These appliances are 33–45 cm deep and work brilliantly in small bathrooms. You can fit one beside the basin, in a niche or under a worktop with no trouble.
2. Enclose the machine with bathroom cabinetry. Choose a unit with a door to hide the appliance – you’ll get a neat, cohesive look and extra worktop space above. In the same run you can plan shelves or drawers for detergents, towels and other accessories.
3. Use the space above the machine. The wall over the washer is perfect for vertical storage. Hang cabinets, open shelves or baskets for detergents, toilet paper and cleaning products. You gain lots of storage without taking up floor area.
4. Plan a straight-line layout. Positioning all elements – the basin, washing machine and shower enclosure – in one line along a wall makes the space feel larger and more orderly. It’s ideal for narrow, rectangular bathrooms.
5. Integrate the washer with the basin worktop. The worktop over the machine can also host a countertop basin. It’s a stylish, modern and very practical solution that saves a lot of space.
6. Use sliding or bi-fold doors. If you want to conceal the washer but don’t have room for hinged doors, choose sliding or folding ones. They save space and won’t block access to the appliance.

A well-designed small 4 m² bathroom can be fully functional – even with a washer and a shower! The main thing is to plan vertically and make use of every niche. You’ll gain more than you expect.

Which radiator to choose for a 4 m² bathroom – looks and space-saving

In a small bathroom, every element should be well thought out – the radiator included. What kind of radiator does a 4 m² bathroom need most? One that combines functionality with a simple form.

The most popular choice is a ladder-style model – it not only heats but doubles as a towel dryer. It’s worth considering an electric radiator if you don’t have access to a central heating system.

Match the radiator colour to your bathroom’s style – white, matt black or chrome are safe, elegant options. Adjustable output is another plus that translates into real savings.

How much does finishing and fitting out a 4 m² bathroom cost – a step-by-step budget

How much does a 4 m² bathroom cost? Prices can vary widely depending on the materials and fixtures you choose. A budget version with a compact shower enclosure, basic sanitaryware and neutral tiles will cost around 10,000–15,000 PLN.

If, however, you go for a 4 m² bathroom with a bath, premium tiles, designer fittings and bespoke units, the cost can rise to 25,000 PLN or more.

Remember the labour costs and essentials such as lighting and a radiator. Every detail matters, so investing in quality usually pays off quickly – in day-to-day comfort.

So if you dream of a beautiful, functional 4 m² bathroom – don’t wait! Start with a plan, choose proven solutions and create a space that really works day-to-day. And if you’re looking for more inspiration, check out our other interiors guides and start designing the bathroom of your dreams today.