I am a registered architect in Massachusetts and has experience in high-end residential and office construction in NYC, and currently doing freelance design build retail projects in Stamford, CT.I want to be a real estate developer/ investor, and without knowing about this great site, I went to NYU to study real estate development and finance (master's).

Best thing to do is discuss with a couple of local GC's and or Architect's that have done this type of work.

An architect (or draftsperson) will have to not only show the elevations and layout of the unit, but they will also have to submit a Title 24 (energy efficiency calculation) as well as the site plan for the entire property.

as an Architect, i recommend calling both a structural engineer (first) and a foundation repair contractor. 

Here's an example budget for a 1500 SF home with unfinished basement (not included):Land: $24,000Soft Costs (Architect, Engineering, permits, property taxes, insurance, loan interest)  $50,000Hard Construction: 1,500 * $95 + 750 * $65 (basement) = $192,000Sale Price: $330,000Transaction Costs: $30,000Net Profit: $58,000 (just under $40 per SF)

Thanks again for all you have done to make this resource possible and thank you to all the engaged members on this site who make BiggerPockets what it is.Anyways, onto myself - I am a young, motivated, and diligent individual currently en route to becoming a licensed architect as well as an aspiring real estate investor/broker. 

A good writer, architect, builder, etc... starts with a outline, shell, or sketch and then fills in the details.

We have the architect drawings on hold as this was decided mid stream.

As an Architect/Project Manager, I am comfortable with some rehab work.

I have and continue to use Google Sketchup, especially for custom work, and then use another program called Chief Architect (interior version) for detailed interior design and finishing.