We built recessed shelves between the wall studs in an unusable pantry wall. The shelves use the free space between the wall studs and take up zero space, and they have the
Recessed Shelves: Everything You Need to Know | Checkatrade
How to Build Recessed Shelves Between Studs in a Wall | Remodelaholic
Modern Meets Casual - Addition & Remodel - Recessed Bookshelf - Modern - Other - by Urbana Design Studio | Houzz UK
How to Build Recessed Bathroom Shelves - The Handyman's Daughter