I was inspired by other BILLY bookcase hacks so decided to hack my own version. Here’s more information on the BILLY bookcase hack I made for my daughter’s 9th birthday. IKEA items used: BILLY bookcase with OXBERG glass doorsNANNARP legs Other materials and tools: Wooden board for top and bottomWhite PaintWallpaperWallpaper adhesive How I transformed the BILLY bookcase into a custom cabinet First, take the two side panels and mark where to cut. I cut them just below where the bottom shelf is screwed on. Then, I sawed wooden boards for top and bottom. The length follows the length of the BILLY bookcase. As for the width it includes the thickness of the doors. For the top panel, I cut the wood at a 30° angle. Next, I sanded the wood to a smooth finish. I painted the wood boards with white acrylic paint for wood. The last bit of hacking was the back of the BILLY bookcase. I ordered photo wallpaper to match the size of the bookcase. Put it on the back with wallpaper glue. Then it was business as usual, assembling the bookcase using the steps in the IKEA assembly manual. The bottom and top wooden boards are screwed to the top and bottom of the bookcase with 4 screws. The last step was to screw on the IKEA NANNARP legs to the bottom wood panel. And there you have it, a BILLY bookcase hacked into a bespoke cabinet. ~ by Wouter Kersschot You may also like these: #1 Add new DIY rattan doors to the BILLY I could not find a piece of furniture for my living room that can contain my many books and did not look like an ordinary bookshelf. Looking at the popular BILLY bookcase, I thought it would look amazing against new DIY doors with a natural material. Raffia was my choice and it turned out fabulous. Read more. #2 The best 14 IKEA BILLY hacks for every room in your home We made a list of the best IKEA BILLY hacks to celebrate the world’s most beloved bookcase. Read more.