Conversion from Outbuilding to Annexe

sheikhazad

Dear All, Im amateur. So pls do not use abbreviations in reply.

Last month I bought an end of terraced house which has an outbuilding at the end of the garden, which is 36 feet (11 meters) away from the kitchen/toilet in main building (extended kitchen/toilet from main building leads to garden then outbuilding).

It has proper lighting, electric sockets & even virgin media internet port. I also see small water pipe protruding from corner of outbuilding, it seems water connectivity from main building is already there. 

I want to convert it into 1-bed room apartment or studio type accommodation annexe by adding toilet/Shower/small kitchen & will sleep regularly.

I still will use main building Living Hall & bigger kitchen whenever I want. 

I’m not sure where to start in this project and what’s best option - gas or electric for kitchen & heating.

1) Will I need planning permission?

2) Will I need Building Control reg?

3) If only toilet/shower without kitchen, will I still need permissions?

4)Can I connect to main building for gas for heating & kitchen? Which one is better option b/w gas & electric? 

5) How much it may cost?

6)How can I avoid separate council tax? If absolutely necessary I have to pay. If no kitchen, will I still pay council tax? 

6) Will I apply planning/Building control application myself or expert is better? I hv limited budget.

6) Whats the best way for planning application if required? I’m thinking to give following reason in planning application:

1. I Want to sleep on ground floor with all facilities beside me due to my permanent osteo-arthritis which cause mobility problem & severe pain 
2. More free space means I can easily use my 4-legged/wheeled crutches when required 
3. It will also help me to go out in garden & relax whenever I want as annexe is joined to garden
4. I will still use main building facilities whenever I want

Pls advise with my above queries & any suggestions u think I may need.

Thanks.