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8 projects show how to have a bathtub in a small bathroom

With the right choices, it is totally possible to have a bathtub in a small bathroom without compromising the functionality of the projects.

By CASACOR Publisher

Submitted at Mar 11, 2025, 1:00 PM

08 min de leitura
Iully Maia - Laura's Suite. CASACOR Ceará Project 2022.

Iully Maia - Laura's Suite. CASACOR Ceará Project 2022. (Esdras Guimarães)

Bathtub in a small bathroom is it possible? Having a bathtub at home is the dream of many people who value a more tranquil and welcoming project, but those with a small available space may find this idea unfeasible.

The good news is that, with good planning and the right choices, it is possible to install this element without compromising the functionality of the project. See below which models are most suitable, optimization tips, and inspirations to transform your space!

What is the minimum size to install a bathtub?


The minimum size to install a bathtub in a small bathroom can vary according to the chosen model. Generally, a space of at least 2.70 m² is recommended so that circulation is not compromised. Compact versions can measure around 1.20 m to 1.40 m in length, making them ideal for reduced areas.

Besides the size, it is essential to check the floor structure to ensure that it can support the weight of the full bathtub and evaluate the position of the plumbing to avoid complex renovations.

Gustavo Martins Loft a CASACOR São Paulo shows decoration design bathroom sink bathtub rug table

Gustavo Martins - Loft UM. Projeto da CASACOR São Paulo 2022. (Renato Navarro/CASACOR)

Models for small spaces


For small bathrooms, it is essential to choose a model that adapts to the space without compromising functionality. Some of the most suitable options are:

  • Compact soaking bathtub: smaller models, without the need for masonry, ideal for those seeking practicality.
  • Victorian or freestanding tub: independent versions that can fit into a strategic corner of the bathroom.
  • Bathtub with attached shower: ideal for those who need to optimize space and do not want to give up the functionality of daily bathing.
  • Corner bathtub: makes better use of lateral spaces and allows for smoother circulation.
Danilo Cajaiba - Casa Urutau San German. Project of CASACOR Bahia 2023.

Danilo Cajaiba - Casa Urutau San German. Project of CASACOR Bahia 2023. (Tarso Figueira/CASACOR)

Tips for integrating without compromising circulation


To ensure that the bathroom remains functional even with the presence of the bathtub, several solutions can be adopted:

  • Choose a bathtub proportional to the space, avoiding very large models that hinder access to other bathroom items.
  • Invest in built-in niches in the wall for storing hygiene products, avoiding the accumulation of external shelves.
  • Use transparent glass doors to separate the shower from the bathtub and maintain a sense of spaciousness.
  • Invest in a strategic layout, positioning the bathtub in a way that does not block the entrance or toilet area.
Casa Pitaya, by Bernardo Gaudie-Ley and Tania Braida. Project of CASACOR Rio de Janeiro 2022.

Casa Pitaya, by Bernardo Gaudie-Ley and Tania Braida. Project of CASACOR Rio de Janeiro 2022. (André Nazareth/CASACOR)

Intelligent solutions to include the bathtub in a small bathroom


In addition to choosing the ideal bathtub, some solutions help further optimize the small bathroom:

  • Light tones and large mirrors create the illusion of a larger project.
  • Continuous floors and coverings avoid visual cuts and give a sense of spaciousness.
  • Custom furniture allows every inch of the space to be used in the best way.
  • Wall-mounted faucets and showers free up space on the countertop and facilitate circulation.
lineastudio architecture feather house casacor rio grande do sul 2022 integrated white loft bathroom bathtub mirror

Lineastudio Arquiteturas - Casa Pluma. Projeto da CASACOR Rio Grande do Sul 2022. (Cristiano Bauce/CASACOR)

Necessary care


Opt for small or corner models, which are more suitable for bathrooms with limited space. Corner options, for example, make better use of the edges and leave the rest of the space free.

Choosing an option that fits well into your bathroom, without compromising circulation or functionality of the project, is essential. Smaller models with vertical design can be good options.

On a slope, a metal structure house is raised above street level. PKB Architecture project. In the photo, a bathroom with a bathtub and stone wall.

Project by PKB Architecture. (Photos: Denilson Machado, from MCA / Visual production: Studio Jefferson Stunner/CASACOR)

If the bathroom is indeed small, consider a more practical and efficient installation. Bathtubs with modern drainage systems or quick installation can facilitate the adaptation process of the space.

Choose lighter materials, such as acrylic or fiberglass, which are easier to install and take up less structural weight, yet still offer durability and comfort for your bathtub.

Coverings

Old apartment is modernized without losing the original layout. Project by Barbara Dundes. In the photo, bathroom with support bathtub.

Projeto de Barbara Dundes. (Fran Parente/Divulgação)

It is also necessary to have additional care with coverings and accessories. The floor must be non-slip to ensure safety when entering or leaving the wet area. Choose coverings that are not only safe but also harmonize with the aesthetics of the project.

Add shelves or niches to store hygiene products without overloading the space. Avoid large decorative items that can make the project feel tighter.

Adriana Esteves - NA.MORADA. Project of CASACOR Rio de Janeiro 2023.

Adriana Esteves - NA.MORADA. Project of CASACOR Rio de Janeiro 2023. (André Nazareth/CASACOR)

If it is necessary to divide the shower area, consider using transparent glass doors or curtains that can be easily opened or closed, without taking up much space.

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.