In Case You Missed It
Ask the DAR
Engine data plate, airworthiness certificate issued by an IA, ELT requirements with ADS-B.
Setting Up Shop
Before you decide you cant build a plane because you don't have enough shop space, think again. After all, as author Bob Fritz points out, projects have been built in apartments. This article wont go quite that far, but it does detail some pitfalls to avoid and makes suggestions about maximizing the ease and efficiency of working in a limited-space environment.