I have been looking at property investment companies too. The best thing is to do a bit of research on the area you're buying. If there are new businesses, new jobs then perhaps there won't be much of a void period. I think most renters wouldn't mind a new-build that has all new stuff, some period properties do look tired around the edges! What companies are you looking at. I have looked into Azzets, Imagine Homes and TIC Invest (this one has a lettings team that can help you rent out the flat). Haven't decided yet as they all have different fees.