Building a 40sqm Garage - where to start

Hey all,

Looking for some advice on where to start on this project.

I'm looking to build a 40sqm (5m x 8m internal size) with running water and electricity.

I've had the designs drawn up, handing to the county council and should be getting notice of decision within the next 3 weeks.

I guess i'll need to high a contractor in galway
(recommendations welcome by PM)
But i'd like to know what to expect so im not being lead astray


I guess 2 trenches will need to be dug from the house
1) for water, electricity, cat6 & satellite cables.
2) for waste water (from the tap in the garage)

The garage walls will be insulated (plan in future years to work from inside it).
With red brick on the long side, but plaster on the rest
It will have a wooden 2 to 3 meter garage door ,2 windows and a side door.
Roof pitch is 25 Degrees
Polished concrete flooring

With the exception of the windows and doors. What kind of cost / time-frame would i be looking?

What hidden expensive might hit me?
What should i plan now to save in the future?
(anyone wish - if only I'd done that)

I was thinking of getting the ground work done this summer and finishing it next year???



Steve