A functional annexe is more than just an extra room; it is a "home within a property". Essential features typically include: Explore Granny Annexes for Extra Living Space - MyBuilder
An (or "annex" in American English) is a self-contained living unit located on the same plot as a primary residence. Unlike a simple garden room or home office, an annexe is specifically designed for full-time, year-round habitation and features its own kitchen, bathroom, and sleeping area. Key Features of a Residential Annexe annexe