Change of Address

I have a query regarding Service Tax

I have a propreitary firm into management consulting. I have a Service Tax registration but due to low income (less than 8 lacs annually), I haven't filed taxes.

Now my question is two fold:

1) I have just shifted to a new premise, so how do I get the change of address? Should I surrender my current registration and apply for a new one. Also, the locality is same(just different block though as far as I know it falls under the same jurisdiction)

2) I have bagged a big project and my income from this quarter will be more than 10 Lacs INR.

So what's is the procedure to change the address and if it's ok to keep the current one(if it falls under the same jurisdiction)

Also, If the only way is to surrender and then apply for a new one for the change of address, what documents I would need to surrender the current registration and do I need to fill any specific forms.

Waiting in anticipation.

Thanks