Guide 1010 min readUpdated 25 July 2026

Intelligence / Commercial

A commercial yield is only as strong as the lease beneath it.

Tenant covenant, permitted use, fit-out, service charge, vacancy and reletting time determine what an office investment really earns.

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The short answer

Commercial due diligence joins the legal income file with the physical and operating asset. Read the lease, tenant, use, fit-out ownership, service costs, vacancy exposure and likely next occupier before accepting a quoted return.

01

Interrogate the rent

Confirm lease term, payment history, deposit, incentives, breaks, renewal, arrears and each party's obligations. A claimed return should be reconstructed from documents and cash actually received.

02

Inspect the space as an occupier

Permitted use, licensing, parking, access, lift performance, floor efficiency, fit-out quality and reinstatement cost affect leasing depth. Vacancy converts these from footnotes into owner costs.

  • Lease and receipts
  • Tenant covenant
  • Service-charge budget
  • Use and licensing
  • Fit-out ownership
  • Vacancy and reletting time
03

Price the interruption

Model the time and money between one tenant and the next. Include marketing, incentives, fit-out or reinstatement, service charges during vacancy and the buyer's likely treatment of any unexpired lease at exit.

Editorial note

Information only. Rates, requirements and building records change. Confirm the current position with the responsible authority and the specific building documentation before relying on a decision.

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