It depends on a lot of factors, but generally the answer is no. some things can affect it like the window must not protrude more than 150mm above the roof, the only way you would have to get building regulations involved is if you where changing the structural design of the building
It depends on a lot of factors, but generally the answer is no. some things can affect it like the window must not protrude more than 150mm above the roof, the only way you would have to get building regulations involved is if you where changing the structural design of the building