I am currently investigating building a house on land that my parents have given me. I am a single parent of 2 and already have a mortgage on a 2 bed house . If i intend to build will i have to reapply for a new mortgage or can i transfer my existing mortgage? I am working part time with the health service for 4 yrs and hope to be made permanent part time in december. Can anyone advise me on the best financial options i can take towards building my house?