I would not worry about a 12 year old roof if the previous job was completed professionally with architectural shingles (which is what I would expect). 

@Jordan DeeneyEspecially with what you did removing a wall I would have gotten a permit, some cities you need architectural done some not you can just hand sketch.

My first one quoted ~$30k, charged hourly, for the following services: schematics & design development, construction documents, and construction administration.Is this a reasonable quote for architectural services for a relatively straightforward project like mine? 

They already have architectural plans. 

Members of the family that purchased the home say they would like to remain anonymous, but admit they’re big fans of the house’s distinctive mid-century modern architecture.

Hello BP,Can anyone recommend an architectural designer to create plans for my ADU build in SFV?

An architectural shingle job up here would cost at least $15K.  

I am a huge fan of the white with black trim trend, I think it works well with many styles of architecture.

Mine came back and dismantled the house (fireplace mantle, all the built-in cabinetry etc lined up in the living room like they were going to hold an auction of architectural parts).

Hi Klint, I'm new to the investment game but can tell you from my career in residential architecture and working with contractors for our projects that for rough numbers we typically tell clients that they can build for about $150/sf using moderate finishes.