Method reviewed:
1. Match the correct evidence
Purchase checks use ready-office sale records. Lease checks use office rental contracts for the selected new-lease or renewal scenario. Selection uses the registered building or project, area, office classification, size and date. Residential and other commercial property types are excluded.
2. Check coverage and recency
The search starts with 6 months and may expand to 12, then 24 months. Comparable selection uses progressively wider size bands of ±15%, ±25% and ±35%, with outlier filtering. A check needs at least five selected records and a latest selected record within 180 days. An insufficient selection stops the check; an area-wide estimate is not substituted.
3. Calculate a benchmark, not a promise
Selected prices or annual rents per square foot are weighted for size similarity and recency. The weighted median and lower and upper quartiles are scaled to the input office size. The resulting range describes the middle 50% of the weighted selected evidence; it is not a confidence interval, forecast or guaranteed transaction price.
4. Keep registry facts separate from scenarios
The report distinguishes selected registered records, model calculations and user inputs. Purchase cost, income and stress scenarios and lease occupancy budgets depend on the figures entered. Context about an area helps exploration but does not replace the building-level evidence. Geographic context uses OpenStreetMap where available; it is not a site inspection.
5. State what the data cannot confirm
Registry evidence does not verify fit-out, floor, view, parking allocation, incentives or permitted business activity. These remain due-diligence questions. A stored report is a snapshot of its inputs and evidence at creation; it is not automatically refreshed to the latest market.
When using or citing a report
- State whether it concerns a purchase, a new lease or a renewal.
- Include the building or project, office size, evidence dates and selected record count.
- Distinguish registered facts, the calculated range and user-supplied costs or income.
- Use the report’s own dates; a page review date is not a data freshness guarantee.