I own a 6000 sqft lot which is allowed to build a ~14000 sqft apartment. The lot is near to an university so there shouldn't be any issue with getting tenants. I am doing some analysis on whether I should sell it after permit is approved, or build it and rent out. I built several SFHs before but I have never built an apartment. I was wondering if someone knows the details of cost to build an apartment? Also I am willing to pay for expense sheet of finished projects. I'm in Seattle area.

@Michael Chen . I just went through this for myself,  Down here in NM building cost will be any where from $75-85 sqft , it good more or less in your market plus the cost of the land 

Wow, my area is much more expensive than that, I heard it would between $200-$300 per sqft + design and land cost.