Residential Architecture: HeritagePhilip Leeson Architects specialise in heritage architecture including additions and alterations to heritage properties in the ACT. We also provide free heritage advice via the ACT Heritage Advisory Service. Conservation Management Plans (CMPs) ACT Heritage Advisory Service Heritage Conservation Corroboree Park Heritage House Canberra Lookout House Canberra Reid Heritage House Canberra Riley Newsome House Brand House Canberra Story Heritage House Canberra