Underfloor electric heating query on floor levels

I am pricing to install an under floor electric heating system in to a new-build extension on to a concrete floor, and I am undertaking the installation of the thermal insulation board, heating mat and self-levelling compound prior to the tiler laying the floor tiles.

I need to advise the builder of the level he needs to allow all the floor finishes to go on and match the existing finished floor level.

Would this look reasonable:
Flexible tile adhesive and thermal insulation 13mm. U/f wiring mat and self-levelling compound 5mm. Tiling adhesive and floor tiles 12mm, total 30mm?

Thanks