This means framing, brick, HVAC, electrical, plumbing, slab, and sheetrock is all the condo community is responsible for. 

I am renting out a comercial unit this year, potential tenant who wants to open a take out place says want to change electric outlet from 110v to 220v because will use comercial oven and also need to install 3 sink as is required by city)Both job need a general contractor and apply permit.

The property is a 100 year old storefront that got an adaptive reuse into a mixed use property by adding two apartments in the vacant upstairs.The building got a full overhaul in the process including all new HVAC, electrical, plumbing, fire sprinklers, structural repairs, ADA compliant bathrooms, and new storefront facade.

I’d say separate all maintenance stuff and separate construction, although they are the same, maintenance are way slower than specialized trades i.e electricians do electrical work everyday.

Even if you're planning to do 100% of the work yourself (And I hope you're not), materials alone will blow your budget by a lot.Just looking at the pictures you've put up, I'm willing to bet there's some DIY electrical.

You gotta know electrical, clear span, loading docks, ceiling height etc...

I see he converted it to gas heat, but I think in my experience that new windows, and installing electric baseboard heat which the tenants pay is the way to go.

Mold, bad plumbing, bad electrical, structural damage can all be high risk items. 

I have a 4 unit house and the electric company took the meter off for one of the apartments.

You say your doing a Full rehab ( walls, electric, plumbing,etc).