The Swan River Colony, established in June 1829, was the only British colony in Australia established on the basis of land grants to settlers. Under the conditions stipulated by the Colonial Office, settlers would be granted land in proportion to the value of assets and labour that they brought to the colony. To ensure "productive" use of land, settlers were not given full title to their grants until they had been sufficiently "improved". The system of land grants continued until 1832, after which crown land was disposed of by sale at auction.