Add to the mix the utilities, architects and engineers and it is easy to get bogged down.  

I was told to get an architect and structural engineer and they will let you know what to fix as the process will require permits and inspections so walls will have to be open.

If you do need stamped plans, then find an architect asap!  

Although the architect should have caught this IMHO.... 

I'm a business architect.

I know an architect out of Ferndale, WA who has some familiarity with what you're referring to.  

It is not unheard of for an Architect/Engineer to have to make existing conditions drawings done prior to design occurring.

I have deep knowledge of the local market, buyers needs, contacts within towns, rules, regulations, architects, and builders, contractors, suppliers. 

The building inspector wanted an architect to draw the layout of the apartment, showing window sizes and exits and then I would apply for the CO and pay the applicable fees.  

He is an architect, and I have a construction background, so I personally learn tons from him and his comments are always so relevant and interesting.I will click on forum discussions if I see his name, because I always can trust that he offers value in his posts (even if the topic is not exactly pertinent to me).