However, you have a legal interest in the property and for this reason your solicitor will be able to arrange access if the builder is being difficult. In recent years this has not been a major issues as most developers are used to dealing with us and the HBF has published a voluntary code, Customer Service Code of Conduct, which states:

15. The home builder will co-operate with appropriately qualified professional advisors appointed by the customer to resolve disputes, if they arise.