Rehab costs for a 100-year-old house

[Brittany Regts]

My husband and I are seeking contractor bids to renovate our first buy-and-hold duplex, which was built in 1918 in Norfolk, VA. I know that renovation costs change from area to area and that each house, with it's unique challenges, is different. However, I was wondering if BP members could share average costs for renovating older houses so that we can judge if our bids are sound.

Also, what are your thoughts on using contractors who refuse to provide anything but a "total cost" estimate, as opposed to itemized list of job costs?

Thanks for the help!