How to plan a bathroom: your 10 step plan

Looking at your bathroom and thinking it’s been at least five (or even 10) years since it’s been done? You’re not alone. The bathroom, much like the kitchen, is one of those rooms that is redone at infrequent intervals – when it’s looking a bit dated, when it doesn’t function very well for you anymore, or you’re just sick of it (quite frankly). Every time I go into my main bathroom, I think about how I could create a large walk-in shower if only the airing cupboard next door could be knocked through – I’ve got the idea, just need to get on and plan it properly.

If you’re thinking it’s time to plan a new bathroom – whether that’s your main family bathroom, ensuite or cloakroom (or maybe you’re converting a space into a brand new bathroom), you’re in the right place.

You might be tempted to follow the latest bathroom trends but put off by the upheaval a project may cause? Well, there’s no need with my lowdown on the secrets to a hassle-free refit.

This double vanity in the home of interiors influencer Little Big Bell is topped with a sleek Ceasarstone composite surface that is designed to stand up to the rigours of busy family life. Frozen Terra 4601 surface, from £410 per sq m, Ceasarstone.

Remember, with careful thought, thorough research, and some knowledge of the process, you can avoid making costly mistakes, causing delays, and get the results you really want instead. And let’s face it, we all want that.

While I go off to knock on that airing cupboard wall to see if a knock through is feasible (promise not to get the hammer out), let’s get to the 10 step plan shall we?

Hansgrohe showers

Recessed lighting, concealed pipework, and seamless tiling strike a fuss-free note. Raindance Select S hand shower 120 three-jet EcoSmart; overhead shower 300 one-jet EcoSmart with shower arm, both from Hansgrohe.

Draw up a plan

Being organised and well informed is key (to life as well as renovations, IMO) and it all starts with having clear intentions. Think about what you want to do. And I don’t mean simply ‘get a new bathroom’. Really, really think about what you want. Is it a place to escape? A family bathroom?

Somewhere where a morning dash is as smooth as possible? Imagine your routine and think about how the bathroom could make life easier, more luxurious, more practical and, importantly, more enjoyable.

Reassessing the existing layout and plumbing arrangements is one secret to a successful refit.
Cayono duo bath in Alpine White; Puro S countertop washbasin in Alpine White, both Kaldewei.

Measure your existing bathroom carefully, noting wall lengths and heights, where doors and windows are, and the position of pipes and waste outlets. Also highlight where precious floor area is being wasted (cue airing cupboards, chimneybreasts, doors blocking areas etc).

Draw your plan with pen and pencil or use online resources – try Roomsketcher – which will allow you to play around with different layouts and return professional results.

Viado freestanding acrylic bathtub, available in three sizes, from £1354 from Bayswater. It is shown here with the Axbridge basin mixer, £220, and floorstanding bath shower mixer, £975, Booth & Co brassware from Vado.

Decide on your budget

‘Plan a bathroom’ and ‘setting a budget’ are two phrases that go hand in hand. Have a clear figure of what you can afford before starting any work. After all, top-end products and fittings are no good if you can’t afford the professionals who have to install them.

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With the average UK bathroom costing around £6000 or more to refit, according to the Homeowners Alliance, it is essential to have your finances in place before engaging any designer or contractor.

Plan lighting and décor early to keep the cost down. Gessi Rettangolo single-lever basin mixer; Kut vanity unit from the Karol Collection; Effegibi FitBox shower system, from CP Hart.

Your budget will need to be divided up to cover labour costs, fittings, and final decorative touches. It is also important to have a contingency pot of around 10% of your total, too, to cover any unexpected costs.

Don’t skimp that 10% either – the contingency is just as important as the main pot of cash. And if something crops up, you’ll be thankful you saved that money, just in case.

In this attic bathroom conversion, a false wall creates separate zones. Conoflat shower surface in Lava Black matt, from £714; Meisterstück asymmetric duo bath, £1260; Centro washbasin in Alpine White, from £734, all Kaldewei.

Decide on a layout

If possible, work with the layout you have. Moving water outlets and, in particular, the waste for the WC, is costly business. If you can make your new bathroom work around these key areas without changing them, plan from there.

However, moving outlets if necessary is possible, so don’t be put off. Remember to factor this into your budget (see above) and speak to a plumber to check it is possible. Also remember, this will add time to your project timeline, so plan for that too.

The WC usually dictates where the other items in the space will go, so decide on its location early. In most bathrooms, the basin sits close to the WC as they are the two pieces that are used most regularly.

The bath or shower often work best towards the back of the room and can become the focal point when incorporated with a mirrored or tiled feature wall.


Clever solutions such as fitted cupboards and a central freestanding wall can create extra storage and a more inviting arrangement. The Viado Bath, from BC Designs is shown here in a project by The Brighton Bathroom Company.

Consider sightlines from adjacent rooms, too – nobody wants to sit in bed facing the toilet, right? Right.

Besides practical issues, consider the feel you wish your new scheme to have. Could repositioning certain items make a space feel more luxurious? For example, think about whether a freestanding bath could become a central feature, or if a beautiful vanity unit could be a focal point.

Think practicalities

Lighting and storage also need to be planned at this stage. Think about which areas require task illumination and where softer, ambient solutions will work best. Also consider highlighting key design features, such as a statement bathtub or a set of shelves, and incorporate wiring as needed.

Bathroom light fittings need a minimum ingress protection (IP) rating of IP44 to prevent water getting in, so you need to be clear about their exact positioning and proximity to the shower, bath, or any other area where water might splash before you buy. Any domestic electrical work should always be carried out by a NICEIC-registered electrician, but this is even more important in wet areas.

Partitioning off a section of the room for the WC and mixing open and closed storage creates a cosy mood. Add a luxury touch with marble tiles, ambient lighting, and gold embossed wallpaper. Beyond Surfex Unik base unit with two drawers and one door; Beyond Surfex bath, both from Roca.

When it comes to choosing storage solutions, look carefully at how you can get the most out of wasted areas. A vanity can make good use of the dead space under your basin and you are also likely to gain valuable space around this area if you add a small work surface. Perfect for that matching soap dish and toothbrush holder I’ve got my eye on.

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Adding a radiator or heated towel rail is another key issue part of this stage, as pipework and electrical circuits may need to be extended.

The Smart.46 modular cabinets can be personalised to suit you. Vanity unit in Grafite Pino Vintage with Kuk handle in Titanio; integrated basin in matt ceramic white: four-LED mirror, £387; tall unit in Grafite Pino Vintage; Rock towel rail in TItanio, from Alternative Bathrooms.

Check water pressure

Not having the right water pressure or choosing a fixture that doesn’t suit your system can lead to a disappointing and frustrating experience where water flow is too low pressured.

Most products on the market require a minimum pressure to work, as well as an optimum to operate at their full potential – so make sure you check this with your retailer and plumber before you buy.

This ensuite bathroom combines industrial-look brushed brass taps and fixtures with a sleek freestanding tub and wall paneling. It was created by West One Bathrooms, where prices for a scheme start from £8000.

Find the right trades to help

You could tackle some of the work yourself if you like and your budget dictates it, but when it comes to plumbing, electrics, and complex jobs, always (read: ALWAYS) call in the professionals.

Coordinate different trades along with product delivery times yourself or go for a complete design and installation package from a specialist bathroom company – these come at a price, but take away the stress.

Establish a good relationship with your designer from the start to ensure you feel fully involved and can check on progress. When commissioning a design package, ensure you have a full breakdown of products, labour costs, and a timeline of what is happening and when.

You could also opt for a mixed approach, where a bathroom retailer designs the layout and supplies products and you hire trades or fitters. Whatever you choose, always obtain three written itemised quotes to compare before making a decision. You’ll also need to ensure all work meets building regulations and can be certified by your local council once completed.

Pembroke 52 sink, Victoria + Albert Baths, and 3831 Contemporary three-hole basin mixer set with crosshead handles in Satin Brass, Perrin & Rowe. (photograph: Kasia Fiszer)

Time to strip the space

The likely first stage of your refit, once plans are complete and you’re ready for work to begin, is to remove unwanted tiles, flooring, and fittings prior to renewing and installing essential services. This includes any building work as well as changes to pipework and electrics.

Walls may need to be channelled out and refinished and floorboards lifted, plus you may even have to reroute waste and soil pipes if your layout is to change. The more complex these are, the higher the costs and the more chance of discovering unexpected problems.

The black and white encaustic- look tiles in Instagrammer Kerry Lockwood’s bathroom are paired with stunning brushed brass taps and fixtures, including the MPRO knurled basin monobloc, £249; MPRO wall outlet with handset and hose, £179; MPRO 300mm showerhead, £299; and MPRO thermostatic shower valve, £549, all in Brushed Brass finish from Crosswater.

Choose flooring and tiles

Any tiles should always be laid before the bath or other sanitaryware has been fitted, but after the plumbing work has been completed.

If you are having underfloor heating, new tiles, or a quality wood floor, you may need to start by installing a ply sub floor first. Tanking – which means fully waterproofing – a wetroom or shower area is another vital task that needs to be tackled before any fittings are in place.

Make sure to order the correct quantity of tiles (or any other surface you choose), plus some contingency, and decide on whether you’ll fit them yourself, or call in the experts.

Choose sanitaryware and brassware

The next stage is to find key pieces such as baths, basins, showers, taps, shower and the WC.

Always recommend seeing your fixtures and fittings in person before making a purchase – it’s important to see and feel the quality and finish in your own hands first. If you do buy online, make sure it’s from a reputable retailer who can offer aftercare if needed, and do your research first so you know the items you’re interested in will fit and be compatible with your plumbing. If in doubt, seek professional advice.

Add luxe by teaming a striking black basin with beautiful brassware. Miena basin in Lava Black matt from the Coordinated Colours Collection with square enamelled waste, Kaldewei.

Be aware that all products will come with lead times – which may differ from brand to brand, so
it’s useful to know about and keep a record of this well in advance.Add this information to your project timeline. As a general rule, purchase six to eight weeks before installation (plus, FYI, many European factories have a summer shutdown).

Fervour floorstanding bath-shower mixer, £1970, Abode.

Decide on those finishing touches

The fun bit – wahey! Choose which paint you want for the walls, decide on the style of mirrors, and find window treatments to complete the new room. Whether you’re doing it yourself or calling in the professionals, it is vital that they are carefully chosen and fitted to complement a top-end finish. Create a moodboard and let your creativity run wild.

Featured image: Meet your storage needs with Scavolini’s modular Tratto vanity, shown in Concrete Jersey textured melamine with a countertop and splashback in Oyster Stoneware.

Updated on 30/06/21.

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