In the UK, the minimum age to legally own a property is 18 years old. This means that people must be at least 18 years old to purchase a house or any other form of real estate. However, it is important to note that buying a house at such a young age may present challenges, as most people in their late teens may not have the financial resources or credit history necessary to secure a mortgage. Additionally, other legal considerations and practicalities, such as contracts and obtaining a mortgage, may also pose difficulties for young buyers.