Hilton Hotels (Australia) Pty Ltd v Sunrise Resources (Australia) Pty Ltd

The dispute in Hilton Hotels (Australia) Pty Ltd v Sunrise Resources (Australia) Pty Ltd concerned the interpretation of a lease term that permitted the lessee to place signs on the premises with the lessor's consent. Hilton Hotels, the lessee, sought to place signs on land adjacent to the demised premises, which were owned by Sunrise Resources, the lessor. Sunrise Resources argued that the consent was limited to signs on the demised premises and was revocable. Hilton Hotels contended that Sunrise Resources was estopped from revoking the consent due to a prior understanding that signs could be placed on both the demised premises and adjacent land.

The court was tasked with determining the extent of the consent granted by the lessor and whether the estoppel by convention applied, preventing the lessor from departing from the prior understanding. The primary legal issue was whether the consent was limited to signs on the demised premises or if it included signs on adjacent land. Additionally, the court needed to decide if the consent was revocable or if it created an estoppel that prevented the lessor from revoking it.

The court found that the lessor's consent to the placement of signs was not limited to the demised premises but also included signs on adjacent land. The court held that the lessor was estopped from revoking the consent because there was a clear understanding that signs could be placed on both the demised premises and adjacent land. The court reasoned that the estoppel by convention applied, as the lessor had previously acted in a manner consistent with the broader interpretation of the consent, leading the lessee to reasonably believe that signs could be placed on adjacent land. Consequently, the lessor was prevented from departing from this understanding.

The court ordered that Sunrise Resources was estopped from revoking the consent to place signs on both the demised premises and the adjacent land. The lessee, Hilton Hotels, was entitled to place the signs as per the prior understanding. The court's decision reinforced the principle that estoppel by convention can prevent a party from reneging on a prior understanding, especially where the other party has acted in reliance on that understanding.