A: In all cases it is highly recommended to have an agreement in writing when it comes to buying home improvement services. There are plenty of providers out there and the company you choose may have their own template. Stotto utilize a set of pre-defined contracts from www.jctltd.co.uk as these have been created for construction projects.
For small works including home extensions we would ask you to agree to this document https://www.jctltd.co.uk/product/building-contract-for-a-home-owner-occupier and we will fully prepare and provide the contract prior to works commencing.