Homeowners in Hawaii looking to shade their lanai can expect to pay a few thousand dollars for a decent aluminum cover, with Carports Hawaii the top pick.

• Carports Hawaii rates best overall, with custom aluminum covers starting around $42 per square foot on Oahu.
• Expect roughly $42 to $55 per square foot installed, depending on the island and the design.
• Hot, rainy weather is pushing more people to cover their outdoor space.
• Before signing, check the contractor's license, ask about materials and how the cover handles wind, and get the warranty and install timeline in writing.

Outlook: Prices should stay in that range through the hot season, though island-by-island differences and rising material costs could push quotes higher.