I just finished my brand new 2400 sq ft, 4/3 house, San Jose CA, built from ground up. The price is not included the existing land.
~$450k
Soil engineer $5k
Structure Engineer 10k
Architecture $20k
Planning department $5k
School Fee $6k
Permit Fee $7k
Extra time for inspection 2K
Foundation/Framing $140k
Electrical $20k
Plumbing $15k
Stucco $25k
Roof $15k
Insulation and sheet rock $25
Paint $8k
Flooring $10k
AC/Heat Cental Air $25k
General contractor for bathroom/kitchen/crown molding/ trace ceiling/led lights/cosmetic and custom design $40k
Custom milguard windows/sliding door/doors/title hardwood floor/cabinet/quart/ all the finished material $50
Land scape and clean up $15k
The price above I hired each contractors to do each Job because they are specialized in their job. So technically I am the main contractors for my house. Took me a little bit longer to build my house, because I vest each contractors careful ly before I hire them. They are a little bit expensive but I know for sure I will pass inspection everytime. If not then I will deduct $100/day if doesn't fix. Don't worry about the taking project on your own because the inspector will be on your side making sure the contractors doing their jobs, that's why you paid them to inspect your house. My house was first time go for every step until the HERTZ test take like a month to schedule an appointment and the contractor mess up because he doesn't have the right calibration but it was a quick fix the inspector overlooked it and ask me to fix it and correct the numbers on the report.
Start to finished 13months!