Holders of the BTS ERA—Design and Implementation of Interior Layouts—work on the design and implementation of custom interior layouts in the fields of commercial interior design (retail stores, hotels, brasseries, etc.), including storefronts, residential and communal interior design (kitchens, bathrooms, walk-in closets, living rooms, etc.), and specialized interior design (boat cabins, hospital utility rooms, recording studios).

The interior designer technically implements the architectural concept defined by the interior architect. Their responsibilities range from technical design through to project completion. They work on projects involving all trades and a variety of materials.

Admission is primarily open to holders of a BAC STI2D, BAC ST2A, BAC PRO in Architectural Space Design, or BAC PRO in Carpentry and Interior Design.
Holders of a BAC PRO who received a “good” or “very good” grade on their BAC are automatically admitted to the BTS program corresponding to their specialty if they meet the application requirements.