Building a 3-family in Boston

[Brandon Rush]

Hey team,

I've got a 2,400sq/ft buildable lot in Dorchester that I'm looking to build on. I bought this lot with my first property, but the plots have separate addresses and deeds.

My GC mentioned to me that building a 3-family is likely going to be cheaper than buying and renovating one. That, of course, might not be true right with material costs through the roof -but generally!

The major question I have is: Where do I start? 

Do I go to the city first? Go to an architect or an engineers? Am I looking for specific construction financing?

I've thought a lot about buying houses, but never about building one. Any advice for a total newbie would be greatly appreciated!