You don't need "blueprints".
You need a plan. I mean that in the literal and figurative sense.
First, start by looking at all the existing conditions.
Measure and draw up what you have now. Take a bunch of photos.
Post that all here.
Then, make a list of all the functions that you want to accommodate.
The next step is to find out what you will be ALLOWED to do.
Find out your zoning classification.
Look at the zoning regulations.
Check the setbacks, accessory building rules, height and size restrictions and lot coverage percentages.
Will this be attached or detached?
Will you demolish the existing or rehab and add on?
Get out your mortgage survey and scan and post it. Check the utility, and any other easements.
Now, with all this preliminary information, start making a list of the uses you will be making of it. List every item you will store, every tool, every vehicle, that you want to house, etc.
Then, make cutouts to scale of 1/4" to 1 foot and start arranging them so they relate to each other in a systematic way.
Once this is set, with adequate pathways, draw a line around it. That is the size space you need.
Notice I didn't say to draw a garage and try to fit everything in it.
At this point, you can start to think about the structure and details like electrical.
Locate windows and doors, and place it on the lot, so it works with the existing structures, terrain and paving and meets all the restrictions noted above.
You have now designed your garage. All that is needed is to draw it up for construction, with enough standard details and material call outs, so that it can be approved for construction and actually built.
For that, you can use the mortgage survey as a plot plan and add a floor plan at that 1/4" scale with electrical indicated on it, a couple of elevations and a wall typical section, and you're done.
Oh, and put your location on your membership. That makes a difference.
Cool planes BTW. I fly this:
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB8QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DA2NTc88vTQg&ei=rG6pU9n2K4yfqAbKooKoDg&usg=AFQjCNHDdyQbjq9vpO2A4Ylg4Qded-wkWg&sig2=ZL_LHFiUqcIMvpjSBMgtOQ&bvm=bv.69620078,d.b2k
