Been living around the Sleaford area now for 3 yrs where house prices have shot up, wish i'd have bought a 2 bed semi straight away for 70k which would be worth around 120k now. I moved from Luton in Dec 2004 for a more rural life. Multiculteralism, immigration, gridlock style traffic, crime and stressful living have pushed people north here from all over the south east and east.
Even the town's one way system is starting to lock up and the local Tesco has increased hugely in size.
Lincoln, Sleaford, Bourne, Spalding and Holbeach i've seen seem to be hotspots where lots of new homes are being built......still cheaper than the national average, if you can get a job then i would recommend.