modern residential facade remodel two story house in mexico clean and proportional architecture second floor expansion only above the garage aligned with the existing volume flat roof simple modern geometry minimalist design light neutral color palette warm white and soft beige walls gray accents garage with horizontal wood look metal door economical materials upper floor over garage with large sliding window or balcony with simple black metal railing subtle wood texture accents pvc or composite not luxury black aluminum window frames existing security bars integrated and painted dark gray warm led recessed lighting under eaves and garage canopy small minimalist planters with low maintenance plants realistic scale realistic shadows natural daylight photorealistic render architectural visualization clean background no people no cars