Not sure if the wall between kitchen and family room is load-bearing. What would be the (ballpark) cost of creating a half-wall in a non-load-bearing wall and also the cost in a load-bearing wall? About 7 foot expanse of wall with kitchen units above and below.
In non load bearing wall $1200 - $1500.
In load bearing wall there are a number of things to consider as it needs to be supported while a beam would need to be inserted. Point loads then need consideration as to how the load weight is transferred to the footings. Will footings need to put in place? Cost could run to $10,000 or more. You really need a respected contractor or engineer to help you. There are to many variables to give any kind of accurate ball park figure.
If its just a non load bearing wall that will still cost you a bit of more money as you still have to finish it up with painting & fixing the floors - May be also you have plumbing, hvac or electrical that needs to be relocated (We could say $2000 - $3000)
In case it's a load bearing wall that will cost you a bit more for the structural work required ( We could say $4000 - $6000)
For a seven foot span non load bearing, we simply demolish the old wall, and then re-frame a half wall, and re-drywall/tape/mud and paint. Not a big job. there would be no issue with the floor; the new half wall would be re-framed right where the old one was. Excluding considerations for relocating any electrical, you would be 1500 tops.
For load bearing, the cost of the beam and the time to install are the key factors. Ballpark: add an additional 2000 on top of the 1500, so lets say 3500 range.
You will require an inspection and sign-off from the city once the beam is installed and before any drywall/bulkhead covers it up(of course you will first require a permit to alter a load bearing wall).
This is not complicated or rocket science: it is basic engineering.
A qualified building professional can quickly determine if the wall is load or non-load.
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