Hi Guta, The ladies who have commented below prove that there is a range of costs. Ironically "general construction" costs are a matter of opinion because they are subjective. One of the estimates below would lead me to believe standard is general and the other is that above average is general.
If you have extraordinary taste, maybe high style appeals to you, then you could easily spend 400-600 per square foot of finished construction.
A little tip: There are "basic construction" costs that every builder will provide as a baseline. Most, probably all contractors, do not estimate the cost of details like plumbing trim, lighting trim, appliances and a number of other decorator items. Don't get me wrong, they will give you an allowance. You know what an allowance is? A: The absolute minimum to make it pass final inspection to gain an occupancy certification.
So averages are very important to consider. The most important of those...the overage average (OA) It will run 18 to 27% of original construction 'cost to build'. Just be aware that the budget is never what your residential remodel project will land. Knowing this, you will make better choices and remember... keep fresh batteries in your calculator.
I hope you find the process an enriching one. It supposed to be.