A house extension in London will help you add new living space at the same time as increasing the value of your property. Our architects can visit you usually within a week, and subject to revisions and approvals, we can apply for planning within two weeks from the architectural appointment. Planning & Build are experts in providing full life cycle construction services house extensions builders in London requirements. and we ensure that disruptions are kept to a minimum - even if members of the family are resident at the property during the ongoing renovations.