For other variables such as tax rates and heating costs, I find it easier to get a good evaluation.

Home was built in 1900, so no central heat and air.

Have the info on:    - any claims in the past 5 years    - when were the Roof, Electrical, Plumbing, & heat last updated    - what alarms/security    - who the prior coverage was for the past 5 yearsCA has become a difficult market for coverage lately so I would start the process early to make sure you are quoted in enough markets.

This would include about 1,000sqft of basic office and restroom and the warehouse area being semi heated only.

This is the simplest method, but it also means your tenants are more likely to abuse the utilities by leaving windows open with the heat or A/C running, leaving lights on, ignoring the toilet that constantly flushes on its own, etc.3.

How is the heating system, the a/c? 

It’s probably best to get their permission if you’re going to use the photos for your advertisements, while they are still in the rental, as there might be personal identification or privacy elements.

The tenant never told me the gas was shut off and the heat was not on.

Hence, with commercial tenants, there's another element that comes into play other than cash flow and appreciation.

There is an element of trust involved working with other GP partners.