There is a minimum 12 month term for SKY+.
If you move SKY offer a relocation service for £40 and includes a new dish, there may be an additional fee if you want more than one digibox connection or require two feeds for SKY+.
Subscription contracts of course are carried over so you won't face any penalty
Depending upon the timescale it might be worth waiting until you move then take advantage of a loop hole that allows you to sign up in your partners name and get a deal only open to new subscribers.
As a general rule SKY will have your name/details already in it's records and therefore you won't be allowed to have a second subsidised installation or take advantage of an offer only open to new subscribers.