Using a residential property as a workplace
You don't always need planning permission to work from home but you probably will if:
* there will be a marked rise in traffic or people calling
* it will involve activities unusual in a residential area
* it will disturb your neighbours at unreasonable hours or create other nuisance
The key test is whether the premises will still be mainly residential. Remember that you may also become liable for business rates.
http://www.businesslink.gov.uk/bdotg/action/de tail?r.l1=1073858799&r.l3=1073960216&r.lc=en&t ype=RESOURCES&itemId=1073791627&r.l2=107385924 8&r.s=sc