If a previous certificate exists, full property rewires for home sellers usually starts by checking whether it still reflects reality. Whether the property is owner-occupied or let in Bridgend, the technical work is identical — only the paperwork's recipient changes. That holds whether the property is owned, let or being sold.
The most useful thing you can tell us on the first call is what changed immediately before you noticed the problem. Two properties on the same street can differ on this entirely. Full property rewires for home sellers is one of the more commonly misquoted jobs, largely because nobody tests before pricing it.
