Adjective
homebuilt (not comparable)
Constructed at home, rather than being obtained from a manufacturer etc.
a homebuilt vehicle
Other examples include its use for homebuilt aircraft such as the RJ.03 IBIS canard. Source: Internet
Mazdas have indeed worked well when converted for use in homebuilt aircraft. Source: Internet
Most of the terminal unit equipment used for receiving RTTY signals was homebuilt, using designs published in amateur radio publications. Source: Internet