Over the years, I have noticed that many homeowners and sometimes even project teams feel that once planning permission is in place, the difficult part is over but In reality, That’s only the beginning. Good technical drawings are not just a formality. They help identify issues early, reduce queries from Building Control, give contractors clearer information on site, and avoid expensive redesign later. In practical terms, they are often where project risk is either managed properly — or allowed to build quietly in the background. This is becoming even more important as regulations continue to evolve. In England, new 2026 publications have already been issued for Approved Document L and Approved Document F under the Future Homes and Buildings Standards programme. That is another reminder that regulatory compliance is not static; it keeps moving, and technical teams need to stay alert. Getting planning approval does not mean your design is safe. A project can be approved by planning but fail Building Regulations because of technical flaws like inadequate foundations or unsafe stairs. For this reason, experts recommend finalising technical drawings before starting work to avoid expensive on-site alteration This distinction matters because many residential projects that appear “simple” on the surface become technically complex once compliance is considered. Building regulations are about how it must be built. Governed under the Building Regulations 2010, they ensure safety, performance, and usability. This is why I often say that planning may unlock the project, but building regulations determine whether the project is actually deliverable. Planning may get the project approved in principle. But building regulations are what make it work in reality. What do you think causes more delays in residential projects? planning issues, or technical compliance issues later in the process?