DIY Ikea Built-In Bookcases
This Genius Ikea Hack Adds Loads of Storage

These cabinets aren't very tall, so you'll want to lift them off the ground so they look taller and fill the wall space a little better. You also need something sturdy to drill them into so they don't move around. So the base is key.
Build two long skinny rectangles from 2 x 4's that will run along the edge where your floor was cut out (another good reason to cut out your floor — guideline!) A nail gun is the fastest way to assemble these. Set them in place end-to-end and running from one wall to the other, and check that they fit. If they do, nail in a series of short 2 x 4's running down the length of the cages. The smaller 2 x 4's should be placed inside the rectangle frames.
Then, screw a long 2 x 4 to the studs of your wall. The cage you just built will support the front of the bookcases, and the suspended 2 x 4 will support the back of them. (I know you have no idea what I'm saying. Just look at the pictures for a bit and hopefully it will make sense)!
Check everything with a level. Use shims to level it out if needed. Once it's all good, screw the cage to the floor.
Step 1: Measure
Step 2: Shop
Step 3: Prepare the Space

Step 4: Build a Cage Base



Step 5: Set Bookcases on Top of Cage

Step 6: Attach Bookcases to Studs
Step 8: Build a Cage For the Top
Step 9: Build Cages For the Sides
Step 10: Drywall Around the Bookcases
Step 11: Trim Time!
Step 12: Caulk

Step 13: Paint

Step 14: Put in Shelves
