Office-to-residential conversions under permitted development rights often have inadequate fire safety. We examine the regulatory gaps and design solutions.. The Problem Permitted development rights allow office to residential conversion without full planning permission. The result: Lower fire safety standards than new build residential No requirement for sprinklers in many conversions Inadequate means of escape — offices designed for daytime, alert occupants Poor compartmentation — open plan offices don't have bedroom level separation Key Risks 1. Single staircase — many office buildings have one staircase inadequate for residential evacuation 2. No protected corridors — office corridors rarely have 30 minute fire resistance 3. Missing detection — L3 commercial detection is insufficient for sleeping risk 4. Structural concerns — fire resistance may not meet residential standards Design Solutions Upgrade to Residential Standards LD1 fire detection throughout 30 minute fire doors to all habitable rooms Protected means of escape Emergency lighting Sprinklers where single staircase constraints exist Fire Strategy Full fire strategy by a competent fire engineer Consider simultaneous evacuation (not stay put) for single staircase buildings BS 8629 evacuation alert system where needed For conversion fire safety, contact us.