(Raphael had the street numbers and zip code wrong.) 

I know that old houses were not always built up to modern code.

MD Code, Business Occupations & Professions, § 17-601.  

Link to the code: https://www.law.cornell.edu/uscode/text/26/1400Z-2Code Language:IRC Sect. 1400-2(c) In the case of any investment held by the taxpayer for at least 10 years and with respect to which the taxpayer makes an election under this clause, the basis of such property shall be equal to the fair market value of such investment on the date that the investment is sold or exchanged.This often confuses people and they think that any investment qualifies for the 10-year exclusion.

Just be as professional as possible,  know your local codes and laws about moving out a tenant.

You could also use grouping if the rental activity is “insubstantial” (a term undefined by the regulations) in relation to the business activity.You can offset the income only if you materially participate, and need to be careful of the self-rental rule under the IRS code 469.

Steve, with the mis-tints, do you then keep the paint mix color codes so you can get the same color the next time?

Anyone have experience with electric locks that you can generate a one time use code for?

Definately check your your local zoning and/or code enforcement office to see what the rules are.Is there any regulations with your HOA if you have one?

As a landlord your are responsible for knowing all your state landlord tenant codes.