comScore
CASACOR
Decoration

8 Common Mistakes that Make the Bathroom Look Smaller

Avoiding the most common mistakes in the bathroom is a way to ensure that the projects, no matter how small they may be, become a functional and welcoming refuge.

By CASACOR Publisher

Submitted at Oct 18, 2025, 12:00 PM

08 min de leitura
Lite Suite, by Igor Zanon. Project of CASACOR Minas 2021.

Lite Suite, by Igor Zanon. Project of CASACOR Minas 2021. (Gustavo Xavier)

The bathroom is often one of the smallest projects in the house, and that’s why every decision—from the finish to the lighting—influences directly the perception of space. Even with a good square footage, simple planning or decoration mistakes can make the room seem more cramped than it really is. Vanessa Figueiredo e Giovanna Arimatéa - Banho do Casal. Projeto da CASACOR Goiás 2025. When the goal is to achieve lightness and fluidity, it is essential to observe the whole: colors, materials, arrangement of elements, and even the way light is distributed. Below, we have gathered the most common mistakes that reduce the sense of spaciousness and some solutions (illustrated with good inspirations!) that help enhance the bathroom with balance and elegance.

1. Overdoing dark finishes


Dark finishes can be sophisticated, but they require moderation—especially in compact bathrooms! When applied to all walls, they absorb light and create the feeling that the project is smaller. If the intention is to use striking tones, the ideal is to apply them to only one accent wall or combine them with light materials, such as white marble, smooth cement, or satin porcelain tiles. The contrast brings depth without compromising brightness.

2. Ignoring the importance of lighting


The light is one of the main resources for visually enlarging the bathroom. Projects with insufficient lighting (natural or artificial) tend to seem smaller and less welcoming. The ideal is to combine general lighting (from the ceiling) with directed spots, such as side sconces or LED strips behind the mirror. In addition to ensuring visual comfort, this composition creates layers of light that make the bathroom more pleasant and highlight textures and materials. Josy Chaves Arquitetura - Sala de Banho Veios da Terra. Projeto da CASACOR Minas Gerais 2025.

3. Using disproportionate furniture and countertops


Very chunky countertops, bulky cabinets, and sinks that are too large for the space are among the most common mistakes. These elements block circulation and detract from the lightness of the project. Choosing wall-mounted furniture and straight lines is an efficient way to enhance the bathroom. In addition to facilitating cleaning, the free space under the furniture creates a sense of spaciousness and fluidity. Light materials and satin finishes also help reflect light and give lightness to the whole.

4. Lack of mirrors—or poorly positioned mirrors


The mirrors play a fundamental role in the perception of space. When small or poorly positioned, they fail to fulfill their function of reflecting light and enlarging the project. The ideal is to choose large models that follow the entire length of the countertop or occupy an entire wall. Frameless mirrors with built-in lighting also contribute to a more contemporary and light effect, integrating naturally with the rest of the bathroom. Elayne Felix - Sala de Banho Deca. Projeto da CASACOR Mato Grosso do Sul 2025.[/caption>

5. Making the shower stall too marked


Tinted glasses, thick metallic profiles, or opaque dividers visually delimit the space and make the bathroom seem smaller. Transparency is therefore a great ally of spaciousness. Clear glass shower stalls with discreet hardware allow the view to flow throughout the project without interruptions. In more contemporary designs, the absence of a step between the floor and the shower reinforces visual continuity and creates a more fluid effect.

6. Overdoing the mix of materials and textures


Excessive visual information—whether through patterns, contrasting grout, or different types of finishes—creates noise and confuses the eye. In small bathrooms, this effect reduces the sense of continuity and fragments the project. Keeping a cohesive palette and choosing few materials is the way to ensure harmony. A single finish applied to different surfaces can create visual unity and subtly and elegantly enlarge the project space. [caption id='attachment_210141' align='alignnone' width='2000']Maria Eduarda Werlich e Danielle Ceriotti - Cápsulas Refúgio - Banheiros Funcionais. Projeto da CASACOR Santa Catarina | Florianópolis 2025.[/caption>

7. Forgetting the role of light colors


Light and neutral colors reflect light and make the bathroom airier. When replaced by very saturated tones on all surfaces, the effect is the opposite: the project loses brightness and seems smaller. This doesn’t mean giving up colors—they can appear in details like towels, supporting objects, or point mosaics. The secret is to balance the composition and ensure the background remains light enough to convey lightness.

8. Neglecting visual organization


Finally, disorder is one of the key factors that make the bathroom seem smaller. Cluttered countertops, visible products, and a lack of niches or shelves take away visual fluidity and impart a sense of tightness. Investing in built-in storage solutions, baskets, and organizers keeps the space clean and balanced. The fewer visual elements compete for attention, the wider and more harmonious the perception of the bathroom will be. [caption id='attachment_157309' align='alignnone' width='300']Ramiro Mendes - Banheiro - Hotel Serendipity - CASACOR Ceará CASACOR Publisher is a creator of exclusive content, developed by the CASACOR Technology team based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho.