Light refurbishment generally involves minor upgrades to a property.
These include redecoration (e.g. painting, plastering, or laying flooring) or the replacement of fixtures and fittings (e.g. a new kitchen or bathroom).
It also covers damp proofing, electrics and central heating. It does not usually cover any structural work such as extensions, removal of load bearing walls. It may include loft conversions with some lenders.
If planning is required it is usually heavy refurbishment that you need with the exception of some HMO conversions.