We had to bring the 1925 house to 2023 code which involved un-installing 26 windows that were already nicely installed (in appearance) in the house, reframing them to 2023 standards (at the time) which also involved strapping the bottom of the wood framing with metal straps (mind you this all after we had already completed the inside renovation).  

A handy search bar in the upper right makes it easy to find previous discussions, blogs, podcasts, and other resources.

We had to remove the windows we had already installed in a 1925 house and reframe the openings to bring them to 2023 building code.  

As someone else said, check the history of prior gas bills and the average bill in your zip code, and understand that you might have to eat that cost.

However these aren't neighborhoods where you can use a zip code analysis like many other Philadelphia zips.

While I'm not sure if this property is in EBR or not, I'm finding the average FMR for 3 BRs for all zip codes in BR is over $1,500.

OKC has alot of opportunity mainly because of its low level of enforcement of housing codes, strong landlord laws and conservative judges in eviction court.

While I'm not sure what zip code this property is in, the average FMR for the Cleveland MSA for a 2 BR unit is $1,255.

If not try a keyless entry situation that allows you add a temp code that will expire after the work is completed.

My local code enforcement officer is happy to take calls.