Which of the following is an influence that can cause existing properties to increase in value?

Government-imposed growth restrictions can lead to an increase in the value of existing properties. When a governing body places limits on new developments or expansion in a certain area, it can create a scarcity of available properties. This scarcity can enhance the appeal of existing properties as demand remains constant or increases while the supply diminishes. As a result, property values in the area may rise due to the limited opportunities for new construction, making the existing properties more desirable and potentially more valuable.

In contrast, unregulated growth might lead to an oversaturation in the market, which can drive property values down. High interest rates generally reduce affordability for buyers, which can depress property values. Market speculation can create fluctuations in property values, but it does not provide the consistent, stable influence that government-imposed restrictions can. The dynamics of real estate often hinge on supply and demand, and when artificial constraints are placed on supply, property values can increase significantly.