You can make an offer in writing, which can include email, but make sure the estate agent will recognise an offer made this way. Some agents will also take offers made by phone, but make sure they are clear on the amount offered in this case, so there are no misunderstandings. Making an offer in writing has the advantage of being more formal and clearer to understand. This is also a good opportunity to list other pointers that may make you a more attractive prospect to sell to. For instance, as a first-time buyer, you won’t be waiting on someone to buy your current property, so there’s no chain your end to worry about.