@Quinton Campbell in regards to zoning you can use this link, https://ca.baltimorecity.gov/codes/Art%2032%20-%20Zoning.pdf and go to page 193. That is the section it starts to talk about R8 zoning. On many small projects I agree with @Greg Dickerson that you can call the city and ask about zoning. On bigger projects like this I would suggest to have an Architect take a second look. The Architect should do it for free or charge a few hundreds dollars at most.
A lot of times the people at the city only give you yes or no answers. If you don’t ask the right question you may not get the right answer. Before I start any project I do my own investigation to make sure a client can build what they want. For me it usually takes 10-15 minutes at most so I don’t charge. I once had a client who didn’t realize a property they bought had a bird corridor easement and they lost 30% of their property.
If you go to the city ask these zoning questions:
1. Setback requirements?
2. Height limit or story limit above grade?
3. Lot occupancy for new buildings. This percentage is usually a hard number unlike an existing building asking for an addition to go over with an exception?
4. Open space requirements?
5. Green area ratio?
6. What is consider a basement so that I doesn’t count towards your story limit?
7. Any review board hearings?
8. Any sight line requirements?
9. Any FAR requirements?
10. Parking requirements?
11. Any requirements to match adjacent rear of buildings? For example can you extend 10’ past your neighbors rear wall.
12. If you want to get an exception or variance what is the process. For new construction I highly advise against this because you can’t show hardship which is a big requirement and neighbors can and will show up.
13. Any neighbor notification letters required?
14. If your property doesn’t extend to the street and you will have to build stairs or retaining walls in public space what are those requirements?
Building department questions:
1. Storm water requirements. With new construction you may have to have all the rain water connect directly to the storm drain?
2. Water meter and lateral requirements?
3. You mentioned prefab so ask if modular construction is allowed? Most likely yes but if you go this route ask a modular company if they can drive their flatbed trucks to your property?
4. Utilities, do they have to be underground?
5. If there is no sidewalk or curbs do you have to build them? Do you have to put up a bond until they are complete?
Whoever you speak to always ask, “are you sure there is lo thing else I need to investigate?” Also, look at you deed for any easements. Sometimes the city will not have these. For example, there might be a road easement that access a lot.
These are all the big questions. Most likely the majority of these will not pertain to this project but I always ask as much as I can because you never know.
Good Luck