HvAC guys, plumbers and electricians are busy but licensed so no huge risk especially if you pull permits and have work inspected.

all materials, all labor costs to others, Not you, utilities, interest payments, permits, licenses, auto/truck expenses, tools needed are all deductable. 

However, I will always contact the owner as soon as time permits.

Employment Growth Outpacing Housing SupplyBuffalo leads the nation in the ratio of new jobs to new homes permitted.

As an example, we decided to replace the windows in a house we were renovating and ended up costing us $50,000 extra because we got into issues with permitting and suddenly found ourselves having to hire an architect, speciality contractors, etc.  

Other international markets may be too opaque for me, and I'm definitely going to invest in China as it's not possible to even have more than one property in your own name (to the best of my knowledge) and the local government can find many ways to screw you over if they wish to.

Depreciation and other deductions aside, irr on our sfr have lagged the s&p all without collections, code compliance as well as escalating municipal rental regulations of permits and licenses.

How unique can you get a permit?

If you have a D property in an A neighborhood, then it's likely vacant and ripe for rehab, or already purchased and awaiting permits for rehab (or tear down).

Our office signed the contract and they got the permit and replaced the drain field.