It will depend on How big your House/Condo/Apt is.
Also, if you want them to do your Laundry ? or something Special around the house.
I have had a cleaning service for 12 years now, and have gone through about 3 different ones.
The first one was a group ( 5 girls ) that would come in and Clean everything. Each one would take a room to clean, it would cost about $15 per hour and they would spend about 3.5 hours.
The 2nd one would had was a Great Girl who did this all by herself.
She would do it all in 3 hours and it would cost us $50.
She was by far the Best, but had to go back to Poland. Big Lost for us.
Because she is the one that got us our Current Girl. Who at first wasn't too bad. At this time, gas prices were crazy and I felt bad. So I told her I would give her $60 for the 3 hours.
She did what she was told, but the only problem was. That you had to tell her each time ( every two weeks ) if you wanted the Oven to be cleaned !
Anyway, two weeks ago when I was getting FiOs put in. The guy was looking for the nearest phone jack. Thought maybe there was one behind the Couch. So I moved the couch away from the wall, and saw all these Cat Toys and Dust about 3 " thick !! I was Pissed !
Also noticed that for a year or two, any ashtrays around the house. Would be cleaned a left on top of the Kicken counter. In the past 4 months, they are now just put in the Dishwasher.
Also found out that she leaves within 2 Hours, and Not the 3 hours I pay for.
So, She will be gone by next week. Working on another Cleaning service that will start in two weeks.
The Bottom line is, you hire a Cleaning service to Clean. They will come and look around. Most likely tell you that they will need to see how long it takes them to Clean the house. ( should be 3 hours ) Again depends on the size...Avg. rate here in NY $20 hour
Could be as high as $25 an Hour