Updated September 2026. This guide explains how to inspect and compare penthouses. It does not assume that top-floor space deserves a fixed premium.
Start with the registered area and actual utility
Confirm the strata lot, floor area, voids, terraces, balconies, roof spaces and accessory lots from the title and plans. SLA explains that strata certified plans show strata-lot boundaries and may record floor and void areas. Review the current survey maps and plans guidance.
Separate internal and external space
A simple total-area PSF can misstate value when a penthouse contains large terraces, roof space or voids. Compare internal living area separately and apply evidence-based adjustments to space with different weather exposure and daily utility. There is no universal discount that fits every unit.
Inspect penthouse-specific risks
- Roof and terrace waterproofing, drainage and ponding.
- Heat gain, wind, glare and window performance.
- Lift access, private-lift maintenance and emergency access.
- Ceiling height, voids, stairs and accessibility.
- Approved alterations, exclusive-use areas and MCST responsibility.
Use scarce evidence carefully
Match recent transactions by project, layout, floor, view, internal area, outdoor area and condition. Review MCST records and obtain legal, building and valuation advice for unusual spaces. Exclusivity and views may influence demand, but they do not guarantee a premium or an easy resale.