Office-to-residential conversions under permitted development often have inadequate fire safety. We explain the risks and requirements.. The Conversion Problem Permitted development rights allow office to residential conversions without full planning permission. Fire safety is often compromised. Common Issues Inadequate compartmentation between units Single staircase serving too many flats No sprinkler protection despite building height Insufficient fire detection systems Emergency lighting gaps Fire service access limitations Legal Requirements Building Regulations still apply to changes of use: Part B fire safety requirements must be met Building control approval required Fire strategy should be prepared before works Best Practice 1. Commission a fire strategy at the earliest stage 2. Engage building control before starting works 3. Consider BS 9991 for a risk based approach 4. Install sprinklers where the building exceeds 11m 5. Ensure adequate escape provision for all flats For residential conversion fire safety, contact us.