The Detailed Design stage requires a set of Building Regulations Drawings to satisfy Building Control for their Plans check procedure.
I offer the Building Regulations package jointly with Specification Notes & Construction Details. This information is utilised by Builders to provide you with a detailed quotation.
The Quotations would be collated during the Tender Stage for selection and shortlisting your preferred builders. At this stage I advise on the process and advocate seeing examples of the Builders works, to better inform your decision, eventually appointing the winning Tender.
I also provide Contract Administration at an agreed fee.