The most reliable approach for determining the value of a single-family residence is the:

The income approach is primarily used for valuing investment properties that generate rental income, as it focuses on the potential income that can be derived from a property. This method is less applicable to single-family residences that are owner-occupied and do not generate regular rental income, making it a less reliable option for determining their value.

The replacement cost approach estimates the value of a property based on the cost to replace it with a similar structure, minus depreciation. While this method can provide a useful valuation for new constructions or unique properties, it does not account for the current market dynamics and buyer preferences that influence the selling price of existing homes.

The gross rent multiplier (GRM) is a valuation method used to estimate the value of rental properties based on their gross rental income. It is not suitable for single-family residences that are not utilized as rental properties, as it does not take into account comparable sales data, which is crucial for accurate residential valuation.