Building a unit in the back of my property. Which Professional do you engage first?

Long story short I have read all my cities permiting package preparation, I have had the city conduct their parcel information search, so zoning and everything is good. So up next is to develop real cost estimates for the project. Among the various plans I need to submit are three that seem to be crosslinked, but I can't figure out which goes first.

the three are:

• architectural
• site
• foundation

Foundation is in there because it contains not just the foundations but the retaining walls. this project is definately going to need retaining walls, but I don't even know if it's possible to make it a slab or pier and post

site is in there because it would show where it's going but if I don't know the where's and whys of the retaining walls, I think I would end up getting a current version and then going to get a permit version

architectural is there because it can either drive the retaining wall locations or the retaining wall location would drive the architectural.

So who likely be the correct professional to get something on the baord so I can start working up an estimate?

submitted by /u/cnhn
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