Building age, MBIS and MWIS: what to check before a Hong Kong viewing
A building’s age, an inspection notice and a completed repair are different pieces of evidence. This guide explains how to organise them without turning a directory result into a safety certificate.
First make sure it is the right building
Write the full street address, block identifier and flat’s estate name on your viewing note. Compare the address in each source before reading the result. A familiar development name is not enough when several blocks share it, and a changed English spelling does not by itself establish a different building.
If two sources disagree, keep both addresses and mark the match unresolved. Ask the agent or management office which documents apply to the block being viewed. Do not average occupation dates or transfer a neighbouring block’s notices simply to fill a blank.
Age thresholds are not inspection results
The Buildings Department describes MBIS as covering buildings aged 30 years or above, excluding domestic buildings not exceeding three storeys, when statutory notices have been served. It requires a Registered Inspector for the prescribed inspection. MWIS uses a 10-year age threshold with the same stated domestic-building exclusion and a Qualified Person for the prescribed window inspection.
The key practical distinction is the combination of scope and notice. A building crossing an age threshold is not the same statement as a notice being served, and neither statement describes the result of an inspection. Read the actual document before deciding which questions remain open.
Build a sequence of documents
Ask for the notice, the inspection report, any repair recommendation, the proposed scope and evidence of completion or submission. Put them in date order. A quotation shows proposed expenditure; a receipt shows a payment; neither alone establishes that the required work was completed and accepted.
Record which party supplied each document and which block or common area it describes. For documents you cannot interpret, ask the relevant qualified professional to explain the scope and outstanding actions. A directory’s count of recorded actions cannot resolve that question.
A worked viewing example
Imagine two flats in a similarly named estate. Block A has an inspection notice in your search result; Block B has no matching result. It is tempting to prefer B on that basis. But your search has not established the completeness of either record set or the physical condition of either block.
Instead, give each flat its own document checklist. For A, ask what happened after the notice and whether a cost or work programme is outstanding. For B, ask for the available inspection and maintenance documentation and verify the address match. Compare the answers and their evidence, not the number of search hits.
Take these questions to the viewing
Separate observations from conclusions. Photographing a crack records something visible; deciding its structural significance requires appropriate expertise. Likewise, a freshly painted corridor is an observation, not evidence of the building’s wider maintenance condition.
Keep unresolved document requests visible when discussing the property with your advisers. A low asking price or a convenient location does not remove the need to understand the documents relevant to your decision.
- Which exact block and common parts does this document cover?
- What remains to be inspected, repaired, paid or submitted?
- Who can provide dated documentary confirmation?
Sources and scope
- Buildings Department: MBIS
Official scheme scope and professional roles. This guide does not assess an individual building.
- Buildings Department: MWIS
Official window-inspection scope; read any notice and current guidance in full.