Is this an apartment or house and how are you fixed for outdoor space? I wouldn't put in electric heating of any sort under any circumstances as it will break you to run it... dig deep and get a heatpump and underfloor heating or wet radiators at least. It'll be more expensive than new electric heating but it will add to the value of the property and be waaay cheaper to run going forward...
You can fit an indoor air source heatpump with ducting for air but would depend on logistics on site... I'd be looking into doing anything I can to achieve that though...
Is this an apartment or house and how are you fixed for outdoor space? I wouldn't put in electric heating of any sort under any circumstances as it will break you to run it... dig deep and get a heatpump and underfloor heating or wet radiators at least. It'll be more expensive than new electric heating but it will add to the value of the property and be waaay cheaper to run going forward...