Upon Carey's death in March 1889, Avondale was inherited by his 16-year-old grand nephew William Herbert deLisle. deLisle arrived and took up residence there in 1893, and assumed the land title in 1894. Avondale had been a pastoral property until deLisle's arrival, over the next ten years sections of the estate were sold off to fund its development. During this period, the house was expanded and the stable built, which included 20 horse stalls with hollow walls and an overhead loft. The hollow walls enable feed from the loft to gravitate directly to the feed bins in each stall.