How is a whole investment building valued?
A reliable valuation combines sustainable net rental income, comparable whole-building sales and the separate value of residential, office and retail space. Vacancy, leases, energy performance and works then adjust the result.
Is price per square metre enough?
No. It is a useful cross-check, but it does not measure lease quality, vacancy, commercial walls, works or the value of a possible unit-by-unit sale.
Which documents improve the appraisal?
The rent roll, leases, annual rent receipts, property tax, energy surveys, plans and recent works provide the strongest starting point.