Plumbing, electrical, roof,  could be as simple as smoke alarms and C/O.If the property does not have a mortgage then it is not law!

Leins, Plumbing scopes, roof certs... leave nothing untouched. 

So run-down is ok, but missing plumbing, electric, holes in the roof, and big issues like that will be harder to get a loan for.

(get a contractor to check the work: foundation, framing, electrical, plumbing etc : as the city will check on that and will want to make sure that everything is ok to issue permits). 3.

If you are doing electrical, plumbing, and shifting of the physical layout, then get a licensed contractor.As an example, i do items like tile but without a license could not do your electrical (even though i know how to).Hope this helps,Matt

Made it easier for plumbing and hidden with a cabinet.

It will cost more for the gas plumbing and all related items. 

There were some headache repairs such as a plumbing leak that had been there for a while, some roof issues, and poor bathroom fans that contributed to common mold in our area.

There were only 10 units originally, and I added an 11th by using existing plumbing/rooms in place.

This deal would have a lot of updating and all new appliances, furnace with central air, water heater and new plumbing in the entire house