One car garage - from MWPS
Go to the link above and then click on the 'Download' button for the one car garage. In PDF format. No instructions but good plans. In standard dimensions (ft and ins).
How to build a single garage - from buildeazy
This garage is designed with cost in mind. It is an ideal project for the person with a limited budget, who does not want to pay the full up-front costs of a completed garage, yet wants something practical and useable in the meantime. This Plan Set shows how a garage can be built and used prior to a concrete floor being laid. Hard ground with a bit of metal thrown on top can be used indefinitely as a garage floor until the time or money can be found to incorporate a concrete slab. Add an iron roof cover and plywood cladding, and this makes for a very cost-effective garage indeed!