Completion certificate (NI only)
Your local building control officer will do a final inspection to issue your Building Regulation Completion Certificate. The Completion Certificate and the plan Approval Certificate are legal documents. You should keep these with your property’s deeds (it may be difficult to sell your house without these documents). The certificate states that the building satisfies building regulation requirements.
Once the house is built, you can apply to get the VAT back on all building work through the DIY VAT Refund Scheme. You will need all of your receipts for this. The refund is available to new builds but also for a house that has been unoccupied or unused for ten years or more, or for a conversion project.