Land To Building Ratio
Calculator

It compares the assessed or market value of the land to the value of the structure built on it, expressed as a ratio or percentage. It matters most for tax depreciation purposes, since only the building portion of an investment property can be depreciated — land value cannot.

The IRS (and equivalent tax authorities elsewhere) only allows depreciation deductions on the depreciable building component of an investment property, not on land, since land isn't considered to wear out. A higher building allocation relative to land generally means larger annual depreciation deductions.

Common methods include using the county tax assessor's land-versus-improvement breakdown as a proxy, obtaining a formal appraisal that separately values land and structure, or using a cost-segregation study for more precision on larger properties. The assessor's ratio is the simplest starting point but isn't always the most accurate for tax purposes.

Not necessarily — while a high land-to-building ratio limits depreciation benefits, land often appreciates more reliably over time than structures, which depreciate physically. Some investors accept lower depreciation write-offs in exchange for stronger long-term land appreciation potential.

The ratio itself is usually set at time of purchase for depreciation purposes and doesn't get recalculated annually, even though relative market values of land and structure may shift. Major renovations or additions typically require a separate allocation adjustment rather than changing the original purchase-based ratio.