Your builder can presumably complete all building operations- except plastering the wall, without interference with your neighbour? On this basis why not proceed with the work and leave the wall face visible to her unplastered. Unless the wall is very exposed dampness should not be a problem- alternatively use cavity wall construction. Your neighour- if she has any sense, will find the bare, unplastered wall objectionable and will probably seek to have it plastered. At this stage you can presumably discuss whether to oblige her or not.