Some of the best rated room makeover games in the UK include Princess Bedroom Decoration, Bedroom Makeover and Cute Room Decoration. Some of the most played games are Selena Gomez Fan Room, Design Your Own Room and Teenage Bedroom Makeover. Girls Go Games offers and promotes theses games quite successfully.
House Crashers - 2009 Media Room Makeover - 1.2 was released on: USA: 2009
I think it depends what exactly you plan to makeover. Do you want to makeover a whole room or just upgrade a room (from an old fashioned 90's room to 2011 modern clean chic)? Just upgrading a room is fast with little changes in furniture, curtains etc. If you plan to makeover a whole room, that will take more time. Here is some infor that will help: http://www.ehow.com/how_5892055_home-makeover.html
About $400
The Wendy Williams Show - 2008 Christopher's Room-Makeover was released on: USA: 21 March 2012
The Outdoor Room - 2010 Backyard Makeover with a View - 3.7 was released on: USA: 17 April 2011
Operation Style - 2000 Office Dining Room Makeover was released on: USA: 25 January 2001
Arresting Design - 2003 My Wife Needs a Room Makeover 1-10 was released on: USA: 2003
The Outdoor Room - 2010 Backyard Makeover with a View 3-7 was released on: USA: 17 April 2011
The Outdoor Room - 2010 Boston Inspired Backyard Makeover 3-2 was released on: USA: 20 March 2011
The Outdoor Room - 2010 Island Living Backyard Makeover 3-11 was released on: USA: 15 May 2011
Dear Genevieve - 2009 A Contemporary Family Room Makeover 2-6 was released on: USA: 23 May 2009