Online Estimator
I would never add an online estimator to my site... Quoting a house correctly means you actually looking at possible access issues etc... Not just adding up the number of windows and doors a house has.
If a customer used your estimator and it came up with a quote of £15... They then ask you to visit them to look at it and you quote them £20 you will probably loose the sell.
Andy
If you actually say its an estimate and not a confirmed quotation as you have to take other things into consideration such as access, parking, issues etc, then they know what sort of quote they are likely to get from you.
You also need to take into consideration how often they want them done or a one off.
The estimator gives them a figure to expect to start off with.
Saves turning up only for them to have a heart attack when you tell them.
well thats my thought on it anyway.