Philadelphia's housing spans 300 years of construction. Society Hill and Old City have Federal-era brick with plaster-over-lath walls and no cable chases. Fishtown and Northern Liberties mix renovated factories with new-build condos. South Philly's narrow twin homes share brick party walls that block wireless signals between floors. The Main Line suburbs - Bryn Mawr, Gladwyne, Ardmore - have larger homes with multiple Wi-Fi dead zones across three or four floors. We design smart home systems for each construction type.