Storage space created under a stairwell by installing a door and shelving, and finished with paint.
The project
I had a big, empty space under the stairs that I have no idea why it was closed. So, I decided to open it to create additional storage space. Most of the D.I.Y. tutorials I looked at were from Bunnings and Gyprock.
Steps
Step 1
First, I opened a small area of the plasterboard to check inside the cavity. The size of the hole was small enough that I could repair it if necessary.

Step 2
Once the small area is opened, assess the load bearing of the studs and create the necessary space to place the door frame with structural Pine. Do your maths two and even three times to include the door opening and door jamb spaces as needed. Add 10mm to be safe.

Step 3
Add the door frame and door jamb. Cross-check the measurements to be sure that you have enough space for the door plus some offset.

Step 4
Add the door and finish the inside with plasterboard and MDF.

Step 5
Finish the plasterboard with joint compound and tape and sand (this is where I got lazy). Install the skirting boards. Use wood filler to close all holes and then paint.
Step 6
Install smooth edge along the perimeter and lay down carpet. Install shelves.

Tools and materials
Materials used in the project:
Tools used in the project: