Is bathroom underfloor heating still notifiable?

[Electricz]

All the specific guidance I can find stating that underfloor heating is notifiable seems to refer to an outdated version of Part P, and I’m trying to understand why generally everywhere still treats it as notifiable.
If a dedicated cable already exists from the consumer unit (so no new circuits are being created), the thermostat (and so connections) are outside of the bathroom as is always required, and the cabling is run under the floor (so is below the finished flood level) it doesn’t look like this should be notifiable and require any sign off, but everything I can find on the topic still seems to be treating it as notifiable works requiring certification by a competent person.

I have no problem paying a qualified person to do the required works, but I do want to ensure that I understand exactly which bits of this are tripping into the regulations and why, as I’m currently seeing a lot if different opinions from professionals as to the required extent of their involvement and amount of testing required, and I don’t want to find out down the line that a requirement was missed.

 

[mainline]

All the specific guidance I can find stating that underfloor heating is notifiable seems to refer to an outdated version of Part P, and I’m trying to understand why generally everywhere still treats it as notifiable.
If a dedicated cable already exists from the consumer unit (so no new circuits are being created), the thermostat (and so connections) are outside of the bathroom as is always required, and the cabling is run under the floor (so is below the finished flood level) it doesn’t look like this should be notifiable and require any sign off, but everything I can find on the topic still seems to be treating it as notifiable works requiring certification by a competent person.

I have no problem paying a qualified person to do the required works, but I do want to ensure that I understand exactly which bits of this are tripping into the regulations and why, as I’m currently seeing a lot if different opinions from professionals as to the required extent of their involvement and amount of testing required, and I don’t want to find out down the line that a requirement was missed.

Any addition or alteration to an existing circuit in a special location.



But I wouldn't be expecting a knock on the door from the police over it.

 

[littlespark]

Is under the floor classed as being “in” the bathroom?

If there’s no connections or wires accessible from the wet areas… then no different than wires in the ceiling above, or buried in the walls.

 

[loz2754]

The special location as defined in part p does not include the whole bathroom, but only within the specified zones. Under the floor is outside any of the specified zones.

So no, it does not require notification.

 

[Electricz]

Thanks all. Sounds like I hadn’t completely missed the point on what Part P needs at least.
I’m not so much worried about a knock on the door as the impact on home insurance if it catches fire at some point down the line and it turns out it needed a qualified installer to sign off some part of it for some reason. The vague ‘electrician must make final connections and test resistance’ from the manufacturer, and the disinclination of any local electricians to connect and test anything they haven’t installed sent me into a very unproductive few days of digging to get to the bottom of the requirements.