Post-completion procedures
HM Revenue and Customs
This is the site for all stamp duty enquiries as well as any other taxation matters that might arise post-completion.
Land Registry
For all post-completion matters relating to registered land and access to the Land Registry Portal.
National Association of Estate Agents
Of benefit should a dispute arise over the payment of the estate agent's account.
The Royal Institute of British Architects
After completion the client might want to carry out alterations, additions, or a complete reconstruction. If so, an architect will be needed.