Design 4 icons

We need 4 icons for a mobile/iPad app. - They should be 3D style but easily editable in Adobe Illustrator so we can change the colours as we need to. - The background of the app is black / dark grey so the icons need to be bright and show some colour to help bring the app to life. - No text in the icons. - All of the icons should be of a similar style so they look like they belong next to each other. - Icons should fit well into a square area - Final display sizes range from 30x30px to 120x120px (approximate). The 4 icons we need are: - Home designs - Display homes - Building companies - Building materials companies We have seen some that we like for your inspiration... HOME DESIGNS These could do with a bit more colour but we like the angle, shading and brightness. [login to view URL] [login to view URL] DISPLAY HOMES This should be a facade of a modern-looking home. Again we like the aesthetics but want a bit more colour [login to view URL] BUILDING COMPANIES Some sort of commercial-looking building(s), these look nice but don't have to be so much detail. [login to view URL] BUILDING MATERIALS COMPANIES Maybe a commercial building with some building materials (bricks, roofing, plumbing, doors, ???) next to it? Not sure how to approach this one as it needs to differ from building companies. Open to suggestions.