That would seem to be the case according to a new study from Stockholm which is summed up nicely at the British Psychological Society Research Digest blog. It reports that researcher Terry Hartig looked at how working from home stops your house being a place of refuge from the world outside using workers at the Swedish National Energy Administration who had just become homeworkers. "Whereas male teleworkers actually reported experiencing less overlap between their work and private lives than the male employees at the office," says the blog, "the reverse was true for female teleworkers, for whom working at home had led to increased work/life overlap. This result bears on the possibility that women are more susceptible to the costs of telework."
Interestingly, the study also suggested that having a separate working space had no effect on a work/life balance, though it's not clear whether they included garden offices/sheds in their research.