It does seem a lot, I'd ask for a breakdown of how the charges have been estimated ie is it on a time basis based on the solicitor's individual charge out rate.
For example if it is say a partner at a large commercial firm, their charge out rates are likely to be significantly higher than say a assistant solicitor at a smaller firm. It may be a partner anticipating say 10 hours work at �250.00 per hour (just an example - these figures are unlikely).
What work is involved, ie drafting, who do they have to liaise with (eg mains provider), what disbursements are involved (as these could be additional costs!).
I'd suggest getting a quote from other firms (make sure they are capable of doing the work though, not someone who thinks they can have a go - to a certain extent you do get what you pay for).
It really does depend on how complex the document is to be. I wouldn't charge anywhere near that much unless it was incredibly complex or a large amount of additional work was involved.
There are guidelines on what solicitors should charge, it may also be an idea for them to advise whether their charges are in line with their professional guidelines.
Hope this helps :)