Question: how much does it cost to add skylights?
Answer: Installation cost for a 2-by-4-foot skylight runs from $500 to $3,000. Here's how the costs break out: Cut a hole in the roof and alter the rafter framing: About $200. Install and flash the skylight: With asphalt shingles, expect this stage to cost $200-$300 -- figure 20% to 30% more for metal or tile roofing.