Of course. If you want your made-to-measure skylights to open, they can be designed to do just that. Opening skylights significantly improve the ventilation in the home or business, and this can help you save money on your energy bills by enabling you to shut down the air conditioner once in a while. 

That depends entirely on the skill of the designer and the ability of the contractor who installs it. As a general rule, however, there is little evidence that made-to-measure skylights are any more prone to leaking than any other type of skylight. 

It's likely to be trickier to install than a standard skylight because of its unique design. However, with proper planning and an expert installer, the installation process should come off without a hitch.

Consider the roof pitch, the opening size, the depth of the roof, the glazing type, your ventilation needs and local building regulations. Remember, made-to-measure skylights cannot be resized or returned if you are not happy. So consider the matter carefully.

As the name suggests, a made-to-measure skylight is one that is custom-built to fit a specific opening or set of design cues required by the customer.

Generally, yes. That's because of the extra design and fabrication work that goes into creating this type of skylight. Exactly how much more it will cost will depend on the size of the skylight, the complexity of the design and whether the client requires any special materials to go into the build.

If a skylight will rise above the highest established point on your roof, or rise significantly above the roof line, you may need planning permission. In addition, if the home is listed or located in a designated conservation area, you will almost certainly need planning permission to alter the roof in any way. 

They can be, but it really depends on the exact design specifications and the materials used to create the skylight. Prior to actually installing the made-to-measure skylight, it is very difficult to say whether or not it will be more energy efficient than other kinds of skylights.