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Primary Bathroom Floor Plans: Layouts and Ideas for Every Size

The primary bathroom is the crown jewel of a home — a private space to unwind, recharge, and enjoy a touch of luxury.

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3D floor plan of a luxury primary bathroom with a freestanding bathtub, double vanity with two sinks, wood and stone finishes, indoor plants, and an adjacent sauna area.
Trude Carlsen

The primary bathroom is usually the largest and nicest bathroom in a house or apartment. It often has one or two sinks, a toilet, a shower, and even a standalone bathtub.

Luxurious versions may include upgraded fixtures and materials, a separate room for the toilet, a spacious walk-in shower, a soaking tub with a view, a specialized makeup area, custom storage, a TV screen, heated towel racks, and many other high-end features.

Are you ready to design a gorgeous primary bathroom floor plan for your home? A beautiful, spa-like zone in which to relax after a long day? Below we’ll share layouts and ideas to inspire you.

Typical Primary Bathroom Sizes

Small Primary Bathrooms (40–50 sq ft / 3.7–4.6 m²)

Even in a compact footprint, you can fit in a sink, toilet, and combined tub/shower. Another option is a ¾ bath with one or two sinks, a toilet, and a walk-in shower.
Tips to make a small primary bathroom feel larger:

Small bathroom floor plan with dimensions, showing a layout that includes a bathtub and shower combo, toilet, and vanity. The 3D view highlights patterned teal floor tiles, white walls, gold fixtures, and compact storage.
Compact Primary Bathroom

Mid-Size Primary Bathrooms (50–100 sq ft / 4.6–9.3 m²)

This size is ideal for a full bathroom with two sinks, a toilet, a walk-in shower, and a separate bathtub. Some layouts in this range include a private toilet room for added privacy. Keep in mind that this may require trade-offs, such as swapping a standalone tub for a combined tub/shower unit.

Bathroom floor plan with dimensions, featuring a bathtub with wooden tray, a single sink vanity, toilet, and walk-in shower. The 3D view shows gray tile flooring, light wood cabinetry, green plants, and a modern spa-like style.
Mid-Size Primary Bathroom

Large and Luxurious Bathrooms (100+ sq ft / 9.3+ m²)

With plenty of space, you can add high-end features and create a spa-like retreat.

Popular upgrades include:

Bathroom floor plan with dimensions, showing a spacious layout with a freestanding bathtub, double vanity, and seating area. The 3D view highlights wood flooring, green accents, patterned tile, and plenty of indoor plants for a fresh, spa-like feel.
Large Primary Bathroom

Tablet view of the RoomSketcher app displaying a 2D floor plan of an apartment layout with labeled rooms and dimensions, including Living Room, Kitchen, Dining Room, Bedroom, Bathroom, Laundry, Closet, Hall, and Balcony. The right side shows a scrollable library of door styles available for placement in the design.

Design Your Bathroom with RoomSketcher

With RoomSketcher, you can draw the layout in minutes, calculate the total area, and add precise measurements.

Try out different layouts, experiment with finishes and textures, and generate professional 2D and 3D Floor Plans.

Bring your design to the next level with 3D Photos and interactive walkthroughs, and share your project with renovators or collaborators to make sure everyone is on the same page.


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