Build to rent is where a property developer builds new homes with the purpose of renting them out, making them the landlord on completion of the development. By utilising development finance like that from Signature Property Finance, you can build properties for your rental portfolio and then use a buy to let mortgage to pay back your development funding and the rent will pay the mortgage. If you have done your sums correctly, you will have a surplus monthly income stream for you as the developer, now acting as landlord.