Which apartment works actually need approval or an NOC in Dubai — and which don't?

Yes, for most apartment renovations you do need approvals before work starts, and getting caught without them is exactly the stop-work-order risk you are worried about, so it is worth mapping upfront. The baseline is an NOC (no-objection certificate) from your building management or the developer to do the work at all; then, for anything beyond cosmetic, moving walls or changing the layout, and any electrical, plumbing or gas work, you typically also need approval from the relevant authority or master developer, because those affect the building's systems and structure. Purely cosmetic work, repainting, new flooring, joinery or wardrobes, is usually much lighter-touch and sometimes just the building NOC. Your scope, moving a few things and redoing the kitchen and bathrooms, almost certainly crosses into plumbing and possibly electrical changes, so it will need proper sign-off, not just get-on-with-it. Doing it without the right NOC and approvals risks fines, a stop-work order mid-project, and headaches at resale or handover. A team that handles apartment renovation in Dubai regularly will know exactly which approvals your specific scope needs and often manages the NOC process for you. Map the approvals before you start, it is far cheaper than being stopped halfway.