Egress basement window - Maryland

[Tom Harkins]

Has anyone installed an egress window in Montgomery County, MD and could share their experience? I am looking to create a legal bedroom in the basement of a SFH. It will involve opening up the foundation (currently a smaller window installed) and enlarging the window well.

I spoke to a knowledgeable rep at DPS (permitting), but I cannot find the specific requirements stated clearly or concisely on their website. The rep did mention it would be difficult to find that. I will be hiring an engineer to design it (getting their assessment on some additional foundation work as well).

If anyone has had success with this and is willing to share their associated costs privately, that would also be helpful as a baseline. But mainly I am looking for guidance on the design, installation, and inspection process.