Buy a 4' x 8' sheet of drywall and cut a large "L". Remove the door casing and the drywall 4' from the corner to about the switch plate or so. Tape, mud, and feather, the new drywall.

Did any of these people tape the joint and mud it? I use two layers of mesh tape overlapped and have had excellent results on old rock foundations for this type of problem. I’ve only had one outside corner joint where this was not effective and there was a LOT of movement on this corner.

I use the method that mainenell just posted, and it has worked pretty well. Wallpaper will not help, it will crack with the wall.

Thank you for the tips. I know that one of the handymen did use mesh tape. Wish you were here in NE Ohio instead of FL LOL.

What a great topic!! Our house is over 30 years old. A few years ago we had our kitchen and 3 bathrooms renovated, and a new oak staircase installed. We then planned to paint. Prior to painting the entire inside of our home, my husband and I repaired all the cracks and nail pops on the walls. We had lots of cracks around our newly installed oak staircase and around the entraces to several rooms. It took us weeks to do the repairs. My husband’s hobby is autobody repair and rebuilding autos. We gouged out all the cracks and he repaired them with autobody products: mainly Bondo, then lots of sanding, then Kilz 2 primer. We gouged out all the nail pops, put drywall screws in, then spackled, sanded, then applied primer. I washed and rinsed all the walls and ceilings prior to painting. We were both “obsessive/ compulsive” people when it came to repairing our wall cracks and nail pops. There is no professional who would ever have taken the time and effort to do what we did. It was a “labor of love”! It has been several years since our huge repair, and it still looks great!! Best of luck on your journey!