Use rental comparisons at building level
An office asking rent is a proposal. A useful rental comparison needs evidence close enough to the target premises to help assess that proposal.
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Published by Astra Terra Properties. Astra Terra analysis and practical guidance. Verify the facts and terms of your own transaction with the appropriate sources and advisers.
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Revised on 3 October 2026 as Astra Terra analysis. Unverified historical market assertions have been removed. The original publication date and URL are retained; this is practical guidance, not a reconstructed news report.
An office asking rent is a proposal. A useful rental comparison needs evidence close enough to the target premises to help assess that proposal.
Define a comparable
Check building, usable area, condition, floor, parking, lease timing and included costs. Record whether each figure is an asking rent, an agreed offer or a documented transaction. Mixing those measures can create an apparent trend that is not meaningful.
Use the evidence in negotiation
Explain differences rather than simply averaging the figures. Ask for clarification where terms are missing and update the comparison when an offer changes. A citywide rental headline cannot establish the appropriate rent for an individual suite.