What do 'ballpark' construction cost estimates include per SF
I am modeling 8 Unit Infill apartment buildings in NYC.

A quick search online shows ballpark construction costs at $300-$400/SF

Do these ballparks include:

GC Fee and hard cost contingency? or are these added on top of the $300-$400/SF estimate?

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Estimate sites do not go into detail.

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EDIT: This is for rough analysis only. A deeper analysis will be conducted in the appropriate manner 
[{"id": "iy8575x", "text": "What type of construction is it? What level of finish?", "replies": [{"id": "iy879yw", "text": "Steel frame, composite deck\n\nFinish mid level", "replies": [], "depth": 2}], "depth": 1}, {"id": "iy87xl8", "text": "\"Googling\" construction costs isn't going to tell you anything. If you are looking at doing an 8-unit infill, in NYC, you are absolutely going to have to do the work to get your own budgetary numbers based on the specific project.\n\nTalk to contractors. Talk to construction firms. Talk to the municipality. Talk to the trades. Talk to an architect. Talk to a civil engineer. That is how you are going to get your numbers. \n\nOr pay someone who does that work to give you your numbers.", "replies": [{"id": "iycol72", "text": "Thanks for the input. I am an Architect (do not ask us about construction costs) just doing very rough prelim numbers to gauge if it's worth spending the time to go more detailed.", "replies": [{"id": "iycp6id", "text": "I like your honesty!", "replies": [], "depth": 3}, {"id": "iydiyq3", "text": "As an architect, you are well aware of the multitude of variables involved in any construction project!  \n\n\nEven just looking for prelim, or budgetary type numbers, I don't feel that you are going to find much that will be relevant for your specific project needs. Anything you will come up with online will either be very dated, or just a very broad national economic average. If I am in ECON101 and have a paper due Friday, I'd pull those numbers off the internet. If I am looking at making a stab at initial feasibility, I'd be pulling in data that is far more local and relevant.", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "iy89f4e", "text": "Agree with the other posters here, but where I'm from yes it would include those two things.", "replies": [], "depth": 1}, {"id": "iy89sf5", "text": "This is why you engage a knowledgeable broker in your area, because they are better than Google", "replies": [{"id": "iybj0x7", "text": "What broker is giving you construction costs and why you listening to them", "replies": [{"id": "iyckkq9", "text": "Any active broker who is running deals that involve construction will know pricing and will know who to ask for current pricing", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "iy8inx8", "text": "Haha good luck getting any estimate right now. Supply chains and labor shortages are only getting worse. It\u2019ll be 10 years before anything remotely stabilizes", "replies": [], "depth": 1}, {"id": "iy91zbs", "text": "Doing a model or a \u201cbudget\u201d is very, very rough and can only really be used for the first looks at a property or project.  Every construction project is a custom build and the pricing that depends on what level of customization and the market the project being built is in.  This being said, you have to use something to budget a project.  If you\u2019re using Google to determine costs, you can assume that those costs would be inclusive of GC fees but probably not contingency.  I usually use 5% hard cost contingency, and 15% all in GC costs (OHP, GC, GR).  Just to add I usually use 10% of total project cost for soft costs as well.  Just my two cents and I\u2019m interested to see what Reddit says about my numbers.", "replies": [], "depth": 1}, {"id": "iy94bp3", "text": "What is the estimated gross square feet area of your proposed building and how many levels?\n\nI could lookin our database and provide you some high level estimates.", "replies": [{"id": "iycoecp", "text": "great thanks for the input\n\nGBA = 7200 SF \n\n4 Levels\n\nsite is 18x100f in Harlem slim infill (brownstone area)", "replies": [{"id": "iyekreg", "text": "These are my numbers:\n\nGBA = 7200 sq.ft.\n\nFloor =4\n\nBasic interior finishings (such as carpet tiles/ceramic tiles)\n\nHVAC - chiller + boiler\n\n**Cost to build= $2,424,000 or $336 psf.**\n\nYou may want to adjust the numbers higher by 10% to better reflect the construction constrains.", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}]