Legal charges for a simple real estate transaction are more often than not, quite predictable. Sometimes, things can happen that translate into added costs and often, there's not much that can be done about it.
For example: A house sold, the offer is clean and simple. There is some confusion over light fixtures that are to be included in the deal. The buyer's lawyer submits, 2 WEEKS BEFORE CLOSING, a letter to the seller's lawyer asking that $5000.00 be held back from the proceeds. This issue was fabricated. There are photos that were taken before the property was listed. They clearly reveal that no fixture has been removed. Yet he persists. His billing hours increase.
The buyer's lawyer has to reply to this request thereby adding to his/her costs.
Then, a few days later, there's an issue about some garbage in the garage... again, long before it has to be attended to.
More billing hours... more costs. Totally unnecessary. The client should have called his Realtor. He/She would have dealt with it... at no added cost.
This is one of the reasons a good Realtor will recommend a particularly solicitor knowing he/she will "facilitate" the sale and not hinder or interfere with the natural order of things.