My sister and I used to work together cleaning houses. There was this one particular house that we cleaned that had been converted into offices. It was your standard older model grey house with a narrow staircase that led upstairs. We refer to it as Betty's House. Years ago before it was made into offices, it belonged to this old lady named Betty. She died in one of the rooms upstairs.
Office employees have heard noises all over the house when they would have to work late.
One night my sister and me were cleaning, when we heard a noise upstairs like furniture scraping the floor. We knew nobody was up there as everyone had gone for the night. We decided we would go up and check it out, just to see for our selves. As we were heading up the stairs the noise stopped. The light switch was all the way at the top of the stairs. When we tried to switch the light on, the light wouldn't come on. We couldn't see anything in the dark, so we went back down and back to work.
I came back through the hall close to the stairs were the light was on. I could hear sounds like someone on the stairs. I stood there thinking maybe someone or something would come down. After a few minutes the sounds were gone and the only sounds were that of my sister working in the back of the house.
I told her what had happened she said she hadn't heard anything. There were other nights when we would see a shadow in the room that used to be the living room. Every room in this house was dark and gloomy. It always felt like someone was standing behind you.
After awhile of hearing these strange noises, we decided we would just walk in and tell Betty we were there just to clean. It worked everything would quieten down. When we were done for the night we would tell her see you tomorrow night. The next night we would come in and if by chance there was an employee still there, they would say Betty was active today. Seems like there was a lot more activity on holidays.