Sustainability Declaration Contact Us Links Household Sustainability Assessments When selling a home in Queensland the owner is now required to complete a Sustainability Declaration. A Sustainability Declaration is a compulsory checklist that must be completed by the seller (vendor) when selling a house, townhouse or unit. It is required as part of the sale from 1 January 2010. It will increase the awareness and marketability of the dwelling’s sustainable building features and will act as an incentive to improve the sustainability performance of Queensland’s 1.6 million existing homes. The Sustainability Declaration is designed to be completed by the property owner or a delegated individual. If an owner is unable to complete the form, they can seek help from SEQ Sustainability Assessments to complete it on their behalf as long as the owner signs it. SEQ Sustainability Assessments provides prompt and professional assistance to complete the task for $99.00.