There's a prayer I found in a book that someone used for this purpose. I think making your own is better and more personal.
My alter has been left up and I'm meaning to pack it away but want to be able to dedicate the time and energy to it. As each item gets wrapped and put in the box I want to cleanse and renew it for the new home and release the previous energies from them so that the new home is a fresh start. I start by casting my circle then simply inviting the four corners/elements and the god and goddess. I talk to them as I put things away and I say a prayer or blessing for each item. (You don't need to bless each candle stick separately lol and you can use different blessings for different items). Then thank the deities and say goodbye.
As for the space, once everything is packed I clean it physically but also spiritually. Sweep out the bad energy, sage the corners, and I have a prayer written at home that I'll post later that I often use just to disconnect spiritually from that physical location.
Wow, I'm rambling a bit. It's been a LONG day and very little sleep for the past week and a half. The move is exciting and great but there's a lot of work to be done and I'm getting completely pooped. Lol. I have some financial matters to attend to as well which is not helping the personal chaos.
The whole point I'm trying to make is that it's just as important to disconnect and move the spiritual energy of your home the same as it is to disconnect and move your electrical/hydro/phone/internet/cable services.