Which valuation method suits an atypical property?

For an atypical or unique property with few comparable sales, the reconstruction-cost method usually fits best: rebuild cost minus depreciation, plus land value. If it generates income, the capitalisation method also applies. The comparison method works only when enough genuinely similar sales exist, which unusual properties rarely have.

Atypical properties defeat the standard playbook. A converted farmhouse, a loft in an old workshop, a one-off architect’s villa or a mixed-use building has few or no true comparables, so the comparison method that values most homes runs short of anchors. The right approach depends on what kind of atypical you are dealing with.

For a unique building valued as a home, the reconstruction-cost method leads: estimate what it would cost to rebuild today, deduct depreciation for age and wear, and add the land value. It gives an honest figure precisely where “similar recent sales” do not exist. For a property that earns income, a rented loft, a commercial space, a building with several units, the capitalisation method applies instead, dividing achievable rent by the market yield; Walloon gross yields run from around 4.8% in Namur to 6.1% in Charleroi (source: hexuvium 2026).

The counter-intuitive move is that the best atypical valuations often blend methods. An agent may reconstruct the cost, cross-check against the few loose comparables that exist, and test an income figure if the property could be let, then reconcile the three. No single method owns the answer for a building that breaks the mould.

This is also where an experienced on-site agent earns their keep. Judging depreciation, spotting the handful of usable comparables and estimating realistic rent all take a trained eye on the property itself, which is exactly what an online estimate cannot provide.

At a glance