13 Bathroom Design Mistakes You’ll Never See in a Rendering

Most bathroom layout mistakes don’t show up in your design drawings. And even those that do are visible exclusively to the eyes that know to look for them.

The most surprising (and therefore most disappointing, frustrating, or even infuriating) issues reveal themselves after your remodel is done, once you start living in what you had hoped and dreamed would be the perfect transformation. What a terrible feeling! All that money invested, and then you’re stuck with a laundry list of little things that thwart you every day.

For example:

• The door you discover bumps the vanity every time you open it
• The drawer that doesn’t open all the way because it hits a towel bar
• The vanity lighting that casts ugly shadows or whose lights aren’t bright enough to see properly

The reason these bathroom layout errors are SOcommon is simple: plans and renderings show how a bathroom looks, not how it behaves once you start moving through it.

That’s where experience changes everything. (In case you were wondering I have over 30 years of it.)

After decades of designing bathrooms, I’ve seen it all: door swings, clearances, sightlines…these are the details that don’t usually attract attention during the design phase, least of all for the homeowners! Yet, as soon as your bathroom remodel is finished, these details become permanent, and painfully noticeable.

That’s why I’m going to tell you what to look out for in your bathroom remodel, right here and now, to avoid these mistakes Let’s take a look…

Door Swing Problems

Let’s start with the mistake I see the most: DOOR SWING PROBLEMS.

You would think something as basic as a door would be easy to get right!! Yet, when you look at plans or renderings, the door is usually drawn in a neutral position. It looks harmless! But in real life, that door is constantly opening and closing.

…And that’s when the problems begin. For instance:

1. Sometimes, the door bumps the toilet or vanity.
2. Sometimes, it prevents a cabinet drawer or door from opening fully.
3. Sometimes it blocks the towel hooks or forces you to use a hook or bar at a weird angle.
4. Another variation of this problem shows up with pocket doors. Pocket doors can be fantastic space savers, but only if they’re planned right. I’ve seen layouts where a pocket door slides directly into the wall where the light switch should be…or where you’d naturally want an outlet. The result? Too bad, no electrical can be installed over the pocket.

How do you avoid all this? Check for door swing details with your design-build firm…ask what directions all the doors will open, and what the clearance is of EVERYTHING around them!!

When a Double Vanity Bathroom Does not Work for Two

One of the most popular requests in primary bathroom remodels for our clients (with larger suburban homes around Keller, Texas) is for a double vanity.

And I understand why!! You get two sinks, sufficient space for two in front of the mirror(s), enough drawers for two…this sounds like the perfect solution for couples who get ready at the same time.

But there are bathroom designs that include a double vanity without leaving enough room for two people to move through the bathroom the way they naturally need to.

On the plans, everything appears to fit. The vanity looks beautiful in the showroom. The bathroom even feels spacious in the design rendering.

…But once the bathroom is finished and y’all begin using it, you realize that the space between the vanity and the shower or tub is too narrow for two people to move past each other.

Picture it: one person is brushing their teeth at the vanity, the other needs to get to the shower, and suddenly someone has to step aside. Morning routines feel like traffic management!!

This is a small layout detail, but it changes the way the bathroom behaves in a BIG way.

Shower Decisions…

Showers are one of the most exciting parts of a bathroom remodel! You get to select the tile, the glass, the built-in benches and recessed niches…on your renderings, the shower typically looks incredible.

But the shower is also where some of the most frustrating layout mistakes hide. For example:

1. Shower controls! Their placement makes all the difference. Surely you’ve seen how most bathrooms have the shower controls right under the showerhead. It seems logical, but when you reach your hand in and open the tap…your arm gets soaked, generally with cold water. If you step in naked, that’s even worse!!
2. Another mistake I see involves benches and niches. Of course we want them placed where they look visually balanced! I’m a professional interior designer, I get that instinct! But sometimes, those features end up right in the path of the water spray. Then, your niche constantly fills with water.

Storage That looks Beautiful…But Isn’t Enough

Now, let’s talk about cabinet drawers.

This is another area where renderings can be VERY misleading. On paper, the vanity looks gorgeous. The drawers are perfectly aligned, the cabinet hardware is super elegant, and everything feels exquisitely intentional.

But drawers have to do something drawings don’t show very well: they have to open.

When drawers start moving, that’s when a couple frustrating problems reveal themselves.

1. One of the most common issues is when a drawer opens directly into something else! Like the towel bar mounted on one side of the vanity, or a wall that’s too close. The drawer opens halfway, then stop, rendering your storage fundamentally less functional.
2. Another mistake I see all the time is failing to plan for the things we plug in and use every day! Hair dryers, curling irons…and, for him AND her, electric toothbrushes!! Everything ends up sitting on the countertop because there’s no outlet inside a drawer.

Once your cabinetry is built and installed, the opportunities for convenience and customization are gone.

Remember: a vanity can look stunning in a rendering, but if the drawers can’t open properly or the things you use every day have nowhere practical to go, that beautiful cabinetry becomes another one of those disappointments you live with every day…

The #1 Mirror Lighting Mistake

Lighting around the vanity mirror is another one of those details that almost never gets done right.

In renderings, the mirror area is always perfectly illuminated. Everything looks balanced and flattering!

But real life is different.

The problem I see most is when lighting isn’t evenly distributed around the mirror. Usually, there’s one single fixture over the mirror, or lighting is placed too high, too far away, or only on one side.

And what does that create?! Shadows. Across your face and under your eyes. It also creates uneven lighting that makes shaving or applying makeup a task of “squint-and-lean-to-check.”

Vanity lighting is task lighting!! It has to illuminate the face evenly and clearly from both sides, not just from above.

What You see When the Door Opens

Now, let’s discuss something that never appears on a floor plan: sightlines.

Design plans show measurements, and renderings show materials and finishes. But neither shows what you’ll experience from right outside the room, or in the first second of walking in. That’s what your bathroom sightlines are!!

1. In many bathrooms, the primary sightline is predictable: the toilet.

But instead, imagine opening the door and seeing a beautiful vanity, or elegant lighting, or a custom designed mirror, or even maybe a piece of art or a statement fixture!! That moment sets the tone for the entire space in a totally different way.

That’s the experience a well-designed bathroom should create.

…And there’s another version of this problem that happens just as often:

• The vanity (the most attractive and visually interesting part of the bathroom in most cases) ends up hidden behind the door! The moment the door opens, the door itself blocks the vanity from view. The focal point of the room disappears.

These things happen because sightlines aren’t always evaluated carefully during the design phase. The focus is too much on making everything fit, not on what the room reveals when someone actually walks into it.

The Future-Proofing Details

When most homeowners plan a bathroom renovation, they’re thinking about how the bathroom will look and feel when it’s brand new. But a bathroom remodel is one of the biggest investments you can make in a home, and it should serve you optimally for decades.

That’s why a few small structural decisions (some that are invisible once the walls are closed) can make an ENORMOUS difference later.

1. First, there’s the shower curb. Many bathrooms are designed with a raised curb simply because that’s the way showers have traditionally been built. But as homeowners get older (or even if someone at home breaks a leg or has limited mobility while recovering from a surgery of some kind), that curb becomes a tripping hazard.
2. Another issue is the doorway width. In bathroom renovations, widening doors requires slightly more construction work…and so people decide not to do it. But, again, if mobility ever becomes a concern (not just from aging), then that narrow doorway becomes an obstacle.
3. Then there’s something no homeowners even realize should be installed during construction: blocking inside the walls for future grab bars!! Grab bars are one of the most useful safety features a bathroom can have. But if the walls weren’t prepared for them during an earlier remodel, installing them later becomes MUCH more difficult, more costly, and actually less secure…

None of these mistakes seem like a dramatic design failure. Each is just a small layout decision, but they can become MASSIVELY frustrating when you live with them every day.

Believe me, the worst thing for me to see is for someone to invest in their home with all the best intentions, then end up disappointed for YEARS. That’s why the right questions during the design phase matter sooo much.

Next, discover the top 42 bathroom design questions to ask yourself, and your remodeler!!

If you’re planning a bathroom renovation and want to be sure the layout works not just on drawings, but in real life, set up a 15-minute video call with our team now to talk!

About the author:

Robin Burrill, RID, NCIDQ, ASID, IDS, CAPS, is an award-winning professional kitchen, bath, and interior designer. Robin and her husband, Robert Mathews, have owned Signature Home Services, Inc. for over three decades, establishing a superior in-house team with a widespread reputation for delivering meticulous design to their many repeat clients.

In 2022, the national publication, Kitchen and Bath Design News magazine, named Robin to their Top Innovator list in recognition of her achievements in the field of kitchen and bath design. In 2024, she was named one of the Fall 2024 Market Pros and “tastemakers” by ANDMORE at High Point Market. In 2024 and again in 2025, Fixr identified her as one of the Top Professional Interior Designers for their nationwide audience. At the start of 2025, she then acted as one of Dallas Market’s “Style Eyes” at Lightovation and Total Home & Gift Market.

Over her extensive career, Robin has been quoted in Architectural Digest and Forbes multiple times; her design work has been featured in top national trade publications; and she has been interviewed for Designers Today magazine’s “Profiles in Design” video series, among others. Widely respected for the depth of her knowledge, Robin is a sought after speaker and judge for many design industry events.

In 2023, Robin designed a bench for Charleston Forge, making her foray into product design. Robin currently serves as a volunteer on the board of the Dallas/Ft. Worth chapter of the Interior Design Society.