i am currently upgrading from dI to Approved contractor, its amazing how things get so blown out of proportion, it put me off applying for A/C for ages because of some of the rubbish ive read from peoples posts on general forums, i had my pre-assessment a few weeks ago and i asked him to explain the whole system and exactly what they require, as it doesnt do this very well on their application pack.
its quite simple you get a sheet to fill in when you apply for A/C and you tick which types of work you undertake/intend on undertaking e.g. dom/com/ind fire alarms emg lighting etc. if you tick the domestic box you will get the part P notification within your scope at no extra cost, you DONT need to show loads of different types of job areas, like 2 commercial 2 industrial 2 domestic etc as some people think, allthough if you can all the better, you will need about 5 jobs or 3 if you transfer over from DI, but as long as you can show the assessor you have a thorough understanding of bs7671, installation,testing and certification and above all safe working practices.
You can show him all domestic jobs if you like, and would be expected to show a few PIR certs too, if you do this however he will quiz you on different areas/methods of installation, as he will want to ensure you have had adequate experience within the areas you tick.
As for the fees, you pay a one off assessment fee of around £550 this includes the pre-assessment when he will go over all your paper work and tell you if he thinks your ready or not, then agree a date for the full day assessment.
then if you pass this you then pay your first year registration which is about the same as the Part P dI every april, if you pass halfway through the year they have a sliding scale of fees for the first year only.
so the way i saw it was if your paying for your Part P scheme every year any way and you are not just doing domestic work then you may as well just apply for A/C ,ok it is another £550 but i have lost a few jobs inthe last year beacause i wasnt an approved contractor which i could easiliy have made that money back on
I say go for A/C, i have my assessment within the next month so ill let you know how it goes! (must admit i am nervous as hell though)