Three Generations, One Bathroom

In Valencia it is increasingly common. Grandparents return to live with their children — or never left. The flats of Benimaclet, Patraix and Jesus, designed in the 1970s for nuclear families of four, now house three generations under one roof. According to the INE, multigenerational households in Spain have grown by 18% in the last decade, driven by economic and cultural reasons and by something as simple as the desire to look after one another.

The challenge is not cohabiting — it is cohabiting well. And few spaces in the home test that cohabitation as much as the bathroom.

Consider for a moment. The very same bathroom that a five-year-old girl uses for her ritual of bubbles and rubber ducks is used by her forty-year-old father for a quick shower before work and by her seventy-eight-year-old grandmother for a slower, more careful process where every handhold matters. The heights are different. The timing is different. The safety requirements are radically different. And the available space, the same.

At Azulia we have spent years designing bathrooms that solve this equation without anyone having to compromise. Without aesthetic concessions. Without that air of “hospital bathroom” that nobody wants in their home. Just intelligent design applied to the reality of families as they actually are.

The Challenges of a Shared Bathroom Across Generations

Before discussing solutions, it is worth understanding the problem honestly. A multigenerational bathroom faces frictions that a conventional bathroom does not contemplate.

The difference in heights. A four-year-old child stands 100 cm tall. Their grandparent, 175 cm. The basin, the mirror, the taps and the shelves are designed for an average adult height that satisfies neither of the two extremes. The child needs a step. The grandparent may need everything to be slightly lower than usual. And the person in the middle adapts, but should not always have to.

Usage times. A working adult needs efficiency: a seven-minute shower, a shave, out the door. A child needs supervision and patience: the bathroom is play, discovery, resistance to getting out of the water. An elderly person needs calm: slower movements, more time to get dressed, perhaps support for getting in and out of the shower. Scheduling conflicts are inevitable, but good design minimises them.

Storage. The toddler’s bath toys. The teenager’s products (which will be many). The grandparent’s medication. Everyone’s towels. A multigenerational bathroom needs more storage than it seems — and better organised, with zones at different heights and easily reachable.

Asymmetric safety. What is harmless for an adult — a slightly slippery floor, a sharp corner, a tap that can reach 55 degrees — is a real risk for a child and an elderly person. The multigenerational bathroom must be safe for the most vulnerable occupant without turning into a padded bunker.

Multigenerational Design Solutions

Shower with Dual Water System

The solution we recommend most frequently: a fixed rain showerhead on the ceiling for the immersive adult experience, combined with an adjustable-height hand shower. The hand shower is indispensable: a child can use it sitting on the shower floor, an adult can rinse with precision and an elderly person can shower seated on a bench without depending on water falling from above. Grohe offers sliding bars covering a 60 cm height range, sufficient to adapt to any user.

Anti-Slip Flooring Across the Entire Surface

Not just in the shower — throughout the whole bathroom. Matt-finish porcelain tiles with mineral texture achieve Class C wet anti-slip rating (the highest under DIN 51097) and are aesthetically indistinguishable from any premium floor. Our usual recommendation: 60x120 cm format in a neutral tone with minimal grout lines. It is safe for a child’s bare feet, for a grandparent’s slippers and for a teenager’s wet socks just out of the shower.

Lighting at All Heights

Lighting in a multigenerational bathroom works in layers. General overhead lighting for daytime activity. Mirror lighting at adult height for grooming. And, crucially, LED skirting lighting at 10 cm from the floor: enough to navigate at night without switching on anything else, visible for a small child and for an older person who gets up at three in the morning. Installing a presence sensor on the nighttime circuit is a detail that eliminates the need to fumble for switches in the dark.

Temperature Control

Thermostatic taps with a 38°C safety stop are non-negotiable in a multigenerational bathroom. They prevent accidental scalding in children and people with altered sensitivity. Roca and Grohe integrate this stop as standard in their thermostatic ranges, with an override button to exceed that temperature if an adult needs it occasionally. It is one of those details that costs 100 euros more than an equivalent single-lever tap and should be mandatory.

Rounded Corners and Safe Furniture

In a bathroom where children play, corners at the height of a three-year-old’s head are an objective hazard. Furniture with rounded edges, countertops with softened corners and handles without sharp edges are not a concession to safety — they are a choice of contemporary design that is also softer to the touch and visually more organic. Our White Natural Wood design applies this philosophy of organic forms as an aesthetic principle.

Wide Door (and Ideally Sliding)

A minimum clear opening of 90 cm. Not just for a wheelchair — for entering with a child in your arms, for two people to cross the doorway when one is helping the other, for the laundry basket to fit through without acrobatics. The sliding door is the superior option in almost every case: it does not take up swing space, it does not slam shut if there is a draught (a danger for small fingers) and it allows more fluid access.

The Double Basin as a Multigenerational Solution

The double basin is usually associated with couples. But in a multigenerational home it has a different and perhaps more powerful utility.

Two basins allow differentiated heights. The first at the standard 85 cm for adults. The second at 75–78 cm, more accessible for an elderly person who needs to lean on the edge or for a child who can now wash their hands alone without a step. If both basins are wall-hung, the free space beneath facilitates seated approach should it ever be needed.

It also solves the morning bottleneck. In a home with three generations, the eight o’clock bathroom queue is a classic. A second basin does not solve the shower problem, but it at least allows someone to brush their teeth while another shaves.

In bathrooms under 8 m², where a double basin is hard to fit, the alternative is a single wall-hung basin at an intermediate height (80 cm) with a sturdy stool underneath for the youngest members. Less elegant, but pragmatic.

Bath or Shower: The Eternal Question in a Multigenerational Home

The short answer: shower always, bath if it fits.

The walk-in shower with a level floor is the common denominator. It works for everyone: an adult uses it standing in three minutes, an elderly person sits on the integrated bench, and a child can sit on the shower floor (which is anti-slip and at floor level) while water flows from the hand shower. The step-free access eliminates the tripping risk that a bath imposes by definition. Our Compact Wet Room design is conceived precisely for this: maximum functionality in the minimum space.

That said, if the space allows (and we are talking about bathrooms of 10 m² or more, or having a second bathroom), adding a bath carries enormous emotional value. For children, a bath is a ritual — play, bubbles, calm before bedtime. No shower replaces it. And for adults, a freestanding bath can be the refuge at the end of the day.

The ideal combination in a multigenerational home: an accessible walk-in shower as the main bathroom for daily use, and a bath (if there is room) in a second bathroom or integrated into the same space if the dimensions allow.

Materials That Withstand Everything

A multigenerational bathroom receives more use, more impacts and a wider variety of agents than a conventional one. Toys dropping on the floor, hair-dye splashes, toothpaste on the vanity, and a significantly higher volume of washes and showers.

Porcelain over natural stone. We say this with some regret — we love natural stone — but in a high-use multigenerational bathroom, quality porcelain is the rational choice. It resists impacts better than marble, does not stain with colouring products, does not need periodic sealing, and current models replicate the texture and veining of natural stone with a realism that requires close inspection to tell the difference. Marble is reserved for the countertop or an accent detail where its fragility is manageable.

Industrial-quality fixtures. In a home where taps are operated fifteen or twenty times a day, the mechanism matters more than the finish. The ceramic cartridges from brands like Roca or Grohe are designed for 500,000 open-close cycles. Budget imitations fail at a fraction of that usage. In a multigenerational bathroom, investing in first-tier fixtures saves you problems at the three-year mark.

Furniture with full hydrophobic treatment. It is not enough for the surface to be water-resistant — the joints, edges and interior of the drawer must be as well. In a bathroom where children splash and doors are opened with wet hands, a unit that absorbs moisture through its edges will swell within two years.

Frequently Asked Questions

How many square metres does a functional multigenerational bathroom need?

From 6 m² it is viable with good layout: walk-in shower, basin, toilet and basic storage. From 9–10 m² you can include a double basin and shower bench. Above 12 m², a bath and shower fit in the same space. Our calculator helps you estimate which solutions suit your specific floor area.

Is it better to adapt the existing bathroom or do a full renovation?

It depends on the condition of the installations. If the plumbing and waterproofing are more than twenty years old, a full renovation is more cost-effective in the long term. Adapting on top of old installations tends to generate hidden problems that surface — and appear on the bill — before long. At our studio we assess each case individually.

Does multigenerational design add much to the cost of a renovation?

Marginally. The key elements — thermostatic taps, anti-slip flooring, level-entry shower, sliding door — carry minimal surcharges over their conventional alternatives. We are talking about a 3–8% increase on the total renovation budget. What does change is the planning: a multigenerational bathroom requires more thought upfront, but not necessarily more money. Consult our article on invisible accessibility for the specific figures.

Should I install a comfort-height toilet if there are small children?

The comfort-height toilet (45–48 cm) greatly facilitates use for adults and the elderly, but it can be high for a child of three or four. The most pragmatic solution: install the toilet at comfort height and provide a child seat with integrated step for the youngest. It is a temporary accessory that is removed when the child grows. The toilet, on the other hand, will be there for twenty years — better that it is at the height most people will appreciate over the long term. You can read more about these solutions in our article on accessible bathrooms and universal design.

A Bathroom That Grows with the Family

The multigenerational bathroom is not a product category or a seasonal trend. It is, simply, a well-considered bathroom. A space that recognises that families are not static — children grow, adults age, circumstances change — and responds to that reality without losing a fraction of its beauty.

At Azulia we design for real life. For families who care for each other, who share space and who deserve that space to work for everyone without anyone feeling limited or excluded. Because the home, as any Valencian grandmother would say, is for living in, not for showing off.

If you are considering a renovation that works for your entire family, we invite you to explore our designs or visit us at our Valencia studio. It will be a pleasure to talk.