Thats pretty good mate!
To improve it, I would think about enlarging the photos so that the work you do can be seen? (perhaps a click-on the photo could take you to another page with a enlarged photo might be a better solution).
List biodegradeable chemicals if you use them?.
Graffitti cleans?.
Show a before and after pic of the sealing rather then just the cleaning?.
I also find that people like to see what you charge instead of having to phone or book an appointment, so perhaps a price per sq yd or mtr might be a good thing to give them a idea?.
Perhaps you could offer a reduction in price if you clean guttering/facias or even re-coat/stain fencing etc as well as your paving cleaning etc?.
