Organizing My Own ADU Construction Project

[Robert Reynolds]

I live in Los Angeles and am looking at building a 2 bed 1.5 bath two story 800sq ft ADU on my property. I've priced out the project and it seems to cost around $110,000 for everything. However if I hire an architect/engineer ($7,500), get permits ($8,000) and hire a contractor ($150,000-$165,000) the price comes in closer to $165,000-$180,000. Is it really 30%-40% cheaper to manage the construction project by myself? Any suggestions or books or podcasts you recommend before starting the project? My expected rent is $2,500-$3,000.

[Matthew Forrest]

@Robert Reynolds I acted as owner/builder (no GC) on a conversion of an existing space to an ADU and I will say that it was very difficult, especially with other things to focus on like work and family. It can be very time consuming and very expensive if you make mistakes. I attribute at least $8,000 in lost rent due to delays from me not managing my contractors well due to inexperience. For me the education was worth it, but if the goal is purely to save money you may not save as much as you plan for when you consider opportunity cost.