Hey mates, I'm building a two-storey home. The wind rating came back as N4. It's near the mountain area and almost on top of the hill. The neighbor on the right and at the back will be lower. The left neighbor is higher and the one across the street is the same height. I was given an additional cost of $11k. I'm not familiar with this topic and wanted to know if this pricing is within the "normal range". I was told N2 is no additional cost, N3 is plus $5k, and N4 is plus $11k. The details of the required works are below. Thanks!
N4 Wind Classification Upgrades (AS4055-2012) = $11k
- Windows & Doors (External) - fixings & sills
- Font Entry - door frame with no sidelight & sill
- Frame - bracing & tie down
- External - roof sarking & fixings