If you were looking at a 20-unit commercial property you might look at a much more extensive round of documents, but for a 1-4 unit you're still in the residential world and the open market tends to simplify the sale process for 1-4 units.  

Does anyone have any referrals? 

If anyone has a referral for a contractor capable of constructing and even planning/designing  ADU's or additions please share.  

But it also makes sense to be that quantity.Does expired leads tend to be more?

Given the home is 2006 I would tend to say no. 

@Rick Albert, I agree if you are representing buyers I’m going to do my best within reason to keep them happy and get those referrals.

Open to any referrals or feedback!

Lastly, there are a couple different ways architects tend to price their work.

The East Side, Bayview, Riverwest, Washington Heights, Walker's Point, etc tend to be the more well known B-class areas that can have attractive options.

I've only gotten a few 4plexes refinanced and it seems they tend to use both comps and the cash flow method.