Yes, most developers will allow changes on a property when it is being constructed until a month prior to requesting the First Occupation License. The further the completion date is, the easier it is for developers to make changes. These can go from minor alterations, to larger modifications. Pro Tip:  The best time to negotiate any type of reform or layout changes is before paying the reservation deposit. In the cases the deposit has been already paid and clients realise the want to make changes, it is best to request them before the signing of the private purchase contract. Always request a written quotation of the works first, before agreeing on any modification.