The tenancy agreement says no fixings in the walls, so you move in, look at a bathroom with one towel rail and no shelves, and decide to make it work. Shampoo goes on the floor of the tub. The towel goes over the door. The razor balances on the edge of the basin.
You tell yourself this is temporary. Then two years pass, and you are still bending down to find the conditioner behind the shower gel, still drying yourself with a towel that never fully dried, still knocking things into the bath every time you reach for something.
Here is the part that is worth naming. The problem is not really that you cannot drill. It is that rental bathrooms are specified with almost no storage in the first place, because storage is one of the easiest things for a developer to leave out. You inherited an unfinished room and a rule against finishing it.
That rule is narrower than it looks, though. It bans fixings, not improvements. Almost everything a bathroom needs can be threaded, hung, stuck, or stood, and all four of those come away cleanly when you leave. Here is what actually works, and how to install it so it stays up.

What Can You Actually Change in a Rental Bathroom?
Anything that attaches without a fixing in the wall. That leaves four methods available to you: threading onto existing plumbing, hanging over a door or rail, bonding with adhesive, and standing freely on the floor or a surface. Between them they cover storage, towels, the shower head, and organisation.
It helps to be precise about what the restriction actually covers, because most renters apply it far more broadly than their agreement does. A hole in tile or plasterboard is a change to the property. A shower head screwed onto a standard shower arm is not, because the thread was designed to be undone.
The same logic applies to anything hanging over a door. It touches nothing permanently, leaves no mark, and lifts off in a second. Adhesive sits in the middle: reversible when applied and removed properly, but worth testing in one spot first if your walls are painted rather than tiled.
What is genuinely off the table is short. Anything needing a plumber, anything cut into a surface, and anything you cannot return to its original state. Everything else is fair game.
Keep the original fittings. Whatever you unscrew, put it in a box in a cupboard, because handing them back at the end is what turns a change into a non-issue.

Where Do You Put Things When You Cannot Fix Anything to the Wall?
Over the door. A door-hung caddy gives you real shelf space without touching a wall, a tile, or a grout line, which makes it the one storage option that is completely risk free in a rental. It also moves toiletries out of the bath, where they collect water and get knocked over.
Think about where your shampoo currently lives. Almost certainly on the floor of the tub or on the narrow ledge of the bath, where bottles sit in standing water, grow a film underneath, and fall over every time you reach past them. That is not a tidiness problem. It is a storage problem with no storage in the room.
A door-hung unit solves it with zero commitment. Nothing is applied, nothing cures, nothing has to be tested. You hang it, load it, and it is done.
The ShowrCove™ Hanging Shower Caddy is built for that exact constraint. It hangs over a compatible door for a removable no-drill installation, so there is nothing to apply and nothing to remove later, and the caddy and frame are stainless steel, which is the material question settled for a room that is humid twice a day. It takes shower gel, soap, towels, and the rest of the essentials that currently have nowhere to go.
Check your door clearance before you order anything door-hung. The thickness of the door and the gap at the top are what decide whether it sits properly.

Can Adhesive Shelving Hold Real Weight in a Shower?
Yes, within limits, and the limits are about how the load sits rather than how heavy it is. Adhesive handles weight pulling straight down far better than weight pulling outward from the wall. A shelf holding bottles close to the wall is well within range. The same shelf with something heavy on its front edge is not.
This is the part most people get wrong, and it is why adhesive gets an unfair reputation. The failure is almost never the adhesive giving up on the wall. It is leverage: load sitting far out from the surface multiplies the force trying to peel the top edge away, so a shelf rated for the weight still fails when the weight sits at the wrong end of it.
Load it the way the physics wants. Heavy items at the back, light items at the front, and nothing hanging off the outer lip.
The ShowrCove™ Adhesive Shelf with No Hole Installation is designed around that no-drill constraint. Self-adhesive tape secures it to compatible wall surfaces with no drilling at all, and the PP plastic body means there is nothing to rust or stain in constant humidity, which is where cheaper metal shelving in a shower starts to fail. It comes in one-piece and two-piece options, so you can put one in the shower and one by the basin, and it comes in white.
Two small shelves usually beat one large one in a rental, because you can place them where the bottles actually are rather than where there happens to be a clear run of wall.

How Do You Dry Towels Without a Drilled Towel Bar?
With an adhesive rack positioned where air can get to both sides of the towel. Most rentals have one rail, usually in the wrong place, which means the second towel ends up over the door or on the radiator. Adding a second hanging point is what stops towels staying damp between uses.
Damp towels are the single most common renter complaint that gets blamed on the wrong thing. People assume the bathroom has poor ventilation, when the actual cause is a towel folded in four over a single rail with no airflow between the layers. A towel needs air on both faces to dry, and a crowded rail gives it air on neither.
Position matters more than size. The best spot is away from the shower spray, with clear space in front, which is rarely where the original rail was fitted.
The ShowrCove™ Retractable Towel Holder suits this because it adds a hanging point without a single fixing. It uses a self-adhesive mounting design, so it goes onto the wall without drilling, and the extendable clip function means it holds a towel out where air can reach it rather than flat against the surface. It works in a kitchen as well, so it moves with you to whichever room needs it next.
Put it on tile rather than painted plaster if you have the choice. Tile is the better bonding surface and the safer one to remove from later.

How Do You Apply Adhesive Fittings So They Do Not Fall Off?
Surface preparation and cure time, in that order. Clean the spot with rubbing alcohol rather than bathroom cleaner, let it dry completely, press firmly for thirty seconds, then leave it unloaded for a full twenty four hours before hanging anything. Most adhesive failures happen because someone loaded it the same day.
Bathroom cleaners are the hidden culprit. They leave a surfactant residue designed to make surfaces repel water, and that same residue stops adhesive bonding properly. The surface can look perfectly clean and still be chemically unsuitable, which is why alcohol matters rather than a rinse.
Where you place it matters as much as how. Adhesive wants one flat, continuous surface, so the middle of a tile is ideal and a grout line is not. Spanning a grout line means part of the pad is bonded to a recessed, porous strip that holds moisture and never fully bonds at all.
Temperature is the other quiet factor. Apply to a cool, dry wall rather than straight after a hot shower, because warm humid tile gives the weakest initial bond of any condition you could choose.
Twenty four hours of patience is the whole technique. Everything else people try instead, more pressure, more pads, a second application, is a way of compensating for skipping it.
What Should You Avoid in a Rental Bathroom?
Three things. Anything needing a plumber, because that is a change to the property rather than a fitting. Anything applied to painted plaster if you have a tiled alternative, since paint lifts with adhesive. And anything heavy bonded above head height, because the failure mode there is not inconvenient, it is dangerous.
There is a fourth one worth saying plainly. Do not drill one small hole on the basis that nobody will notice. Deposit disputes are not usually about the hole itself, they are about the fact that it is unarguable, and it undermines your position on everything else in the inspection.
The genuinely useful habit is to photograph the bathroom on the day you move in, before you change anything. It takes two minutes and it settles every later question about what was already there.
A rental bathroom does not need to be endured for the length of a tenancy. Thread, hang, stick, and stand are four methods that cover almost everything the room was missing, and all four come off the day you leave.

Frequently Asked Questions
Can you put up shelves in a rental bathroom without drilling?
Yes. Self-adhesive shelving bonds to tile without a single fixing, and an adhesive shelf with no-hole installation removes cleanly later. Keep the heavier items at the back of the shelf, since outward load is what causes adhesive to peel.
Do adhesive bathroom fittings damage tiles when you remove them?
Properly applied adhesive pads come off tile without damage, usually by warming them gently and peeling slowly rather than pulling straight out. Painted plaster is the surface that carries real risk, because paint can lift with the pad.
What is the best no-drill storage for a shower?
A door-hung caddy, because it touches no surface at all. The ShowrCove™ Hanging Shower Caddy hangs over a compatible door and lifts off whenever you need it gone, which makes it the lowest-risk option in any tenancy.
Can renters change the shower head?
In most cases yes, because standard shower heads thread onto the existing shower arm and come off the same way. Keep the original head and refit it before you move out.
Why do my towels never dry in a rental bathroom?
Usually because there is only one rail and towels get folded over each other on it. A towel needs air on both faces, so adding a second hanging point away from the shower spray fixes it more reliably than better ventilation does.