Contributory Value of an Outbuilding

by | Feb 25, 2026 | Residential Appraisal Insights

Contributory Value of an Outbuilding Valuing an outbuilding can be difficult. First thing I determine is if the building is permanently attached to the lot, if not and be removed it is personal property, not real property. I usually go one of two routes when valuing the barn, shop or shed while developing my appraisal. I complete the cost approach to the outbuilding and apply depreciation to get the depreciated cost of the outbuilding. I use cost data from the National Building Cost manual. I also determine how many vehicles the outbuilding can hold. It takes about a 10’x20’ space for each vehicle. Using comparable sales, I determine if the market accepts and gives value to the outbuilding. If so, I will reconcile the two values for an adjustment to apply to the comparable sales. If you run into trouble placing value on an outbuilding, please send a message or post here and we can kick it around!

Contributory Value of an Outbuilding

Valuing an outbuilding can be difficult. First thing I determine is if the building is permanently attached to the lot, if not and be removed it is personal property, not real property. I usually go one of two routes when valuing the barn, shop or shed while developing my appraisal.

I complete the cost approach to the outbuilding and apply depreciation to get the depreciated cost of the outbuilding. I use cost data from the National Building Cost manual.

I also determine how many vehicles the outbuilding can hold. It takes about a 10’x20’ space for each vehicle.

Using comparable sales, I determine if the market accepts and gives value to the outbuilding. If so, I will reconcile the two values for an adjustment to apply to the comparable sales.

If you run into trouble placing value on an outbuilding, please send a message or post here and we can kick it around!