First Floor Extension Over Carport Cost. According to salter spiral stair, “the approximate cost of finishing the bonus room over your garage is approximately $35 per square foot. However, this figure is now somewhat out of date.
Hi, the average cost for this project would be aprox £1200 per square meter of area then your required fittings would be added as extra to the schedule of build. At an average of $45 per square foot, a small front porch addition costs about $2,900 while a porch running the full width of your home ranges from $15,000 to $20,000. Ours worked out at £1400 in the end.
We're looking to build a 2 storey extension to the side of our house which will consist of a bedroom with ensuite on the upper floor with a carport underneath.
However ground work costs such as foundations can cause your cost to increase considerably if there are complications with your build. Rear extensions cost around £15,000 to £80,000 and are located at the back of a property. You can also enhance the front of your home with a porch extension (typically built around your front door) which costs approximately £1500 to £7000. The timescale required to build it is also more predictable with it being less dependent on good weather conditions, particularly if the works are being carried out in the winter months.
