Seattle STFI 1 story addition

[Zach Capehart]

Hello,

I am considering using the Seattle STFI process to add a 1 story, ground level, less than 750 sq ft addition to a house I own.

I have used the STFI process previously to remodel a kitchen, with me doing the design and much of the work myself.

A housing addition is obviously much more complicated than a kitchen remodel, however, I would like to save $ and GC the process as much as possible.

My ideal process would be:

• Get professional help in all aspects of design, feasibility etc.
• Get professional help in planning the build, schedule etc.
• Me scheduling, orchestrating the individual contractors on the build (slab, plumbing, framing, electrical, etc.)
• Me doing most finish work.

Question:

Does the process I described above seem reasonable? If so, who would be the best type of professional who’d be able to help me on #1 and evaluate the feasibility of an addition, given the constraints of the existing plot, structure, etc?

Thanks for the help!