I did have one electrician come and quote it out for about 12k but that didn't include the permits or any costs related to ComEd.

Get permits to build a detached ADU (DADU)/backyard cottage in the backyard3.

My customer service rep is a flipper and I love that because he knows why I want to do what I want to do and can discuss the approaches with knowledge.So far, the experience has been positive.

Are you completing these renovations with all appropriate permits and approvals?

We completed the work 2 weeks before our baby was born so we took a 4 week hiatus to rest and have the baby.Then I dove into the design, planning, and permitting for the basement.I visited the local Permit office in Alexandria and basically said, "Hi, I'm a new homeowner and I'm an idiot when it comes to permitting.

Duplex have different zoning that may permit additional units.

Mine is customized to my properties and my needs.I have a tab for each property.

Some will give you costs based on no permits, which will likely be lower.  

The naca program will permit single home Duplex , triplex , four plex  so you can live with your wife in one town house and rent the rest 

For non-primary residences, they have to follow all of the following rules to receive a permit: - the property must be a minimum of one (1) acre in size (designed as a precaution to disturbances)- The building standards of the underlying zone district must be met - Adequate parking is provided - Defensible Space requirements are met - Valid water and sanitation must be demonstrated - No more than five (5) bedrooms are in the dwelling As time goes on, they continue to become more strict on the rules listed above here, and are actively regulating it.