How Commercial Property Is Valued: It's About the Lease, Not Just the Bricks

The first thing that surprises people about commercial valuation is how little the building itself drives the number. Two identical warehouses side by side can be worth very different amounts — because one is leased for ten years to a national tenant and the other sits empty. Commercial property is valued on its income and its lease, not just its bricks. Here is how it actually works.

The main method: capitalising the income

For most income-producing commercial property — office, retail, industrial — the primary approach is the capitalisation of net income. You take the net annual income (the rent after outgoings) and divide it by a capitalisation rate drawn from comparable sales:

Value = Net annual income ÷ Capitalisation rate

The cap rate (or yield) is where the valuer's read on the market actually lives. A lower cap rate produces a higher value — because when risk is low and demand is strong, buyers pay more for each dollar of income. That rate is not plucked from the air; it comes from recent sales of similar assets in the same market.

Why the lease is everything

The income you capitalise is only as good as the lease behind it. This is where a commercial valuation earns its keep — a valuer reads the lease as closely as the building:

• Tenant covenant — a national retailer or a government department is a far safer income stream than a local sole trader. Stronger covenant means lower risk, a tighter cap rate, and a higher value.
• WALE (weighted average lease expiry) — how long the income is locked in. A long WALE to a strong tenant is gold; a building with leases rolling off next year carries real vacancy risk.
• Is the rent at market? A property let well above current market rent ("over-rented") won't hold that value when the lease ends; an under-rented one has upside.
• Outgoings and lease structure — who pays rates, land tax, insurance and management (net vs gross lease), plus incentives, rent reviews and make-good obligations.

That is why a vacant building, or one on a short lease to a weak tenant, can be worth a fraction of the identical building next door on a ten-year lease to a strong covenant. The bricks are the same. The lease isn't.

The other methods, and when they're used

The income approach rarely works alone. Direct comparison — recent sales on a dollar-per-square-metre of lettable area basis — sits alongside it as a sanity check. For larger or complex assets with lumpy income, a discounted cash flow models the income year by year. Special-purpose buildings — a service station, a childcare centre, a hotel — often need a cost or specialist approach. A sound valuation triangulates across methods rather than leaning on one.

Where geography bites

Cap rates are not uniform. A CBD office in Sydney or Melbourne trades on a very different yield to a regional retail strip, and industrial and logistics ran hot through the early 2020s before yields softened. Canberra has its own quirk worth knowing: a large share of its office market is leased to Commonwealth or ACT government tenants — a strong covenant that supports value, but also a market that moves with public-sector leasing decisions. The local read matters, which is why interstate assumptions tend to miss.

When you'll need a commercial valuation

The triggers are wider than most owners expect:

• finance or security for a bank;
• a purchase or sale, to test the asking price against the income;
• financial reporting — fair value for audited entities;
• an SMSF holding commercial property, where an annual market value is part of the fund's compliance (see SMSF property valuation) — often involving business real property acquired from a related party;
• rent reviews (rent review valuations);
• insurance, where the replacement-cost figure is a different number again.

The takeaway

When someone asks "what's this commercial property worth?", the honest first answer is another question: "what does the lease say?" Get the net income, the covenant and the cap rate right, and the value follows. If you need a defensible figure on an office, retail, industrial or mixed-use asset, you can request a commercial valuation quote — or read more about our commercial valuations and how we establish current market value.

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Sources

• Australian Property Institute — professional standards
• International Valuation Standards Council — IVS

Last verified 15 June 2026. General information, not financial advice; a commercial valuation depends on the specific asset, lease and market — confirm your situation with a qualified valuer.