Where your employer pays you a housing allowance, this can be considered when you are applying for a mortgage.
For example, if you currently live in company provided accommodation and it is stipulated in your contract or salary certificate that you will be paid a housing allowance should you leave the provided accommodation, then the allowance you will be paid can be considered for your mortgage.
You will still be required to have the necessary down payment, but the allowance can contribute to your affordability and therefore can, in some cases, increase the amount you are able to borrow.