Operating-building due diligence

Maintenance history, service contracts and major works

A one-off visit shows condition today. Maintenance history shows how the building prevents failure, closes root causes, manages contractors and prepares for expensive asset replacement.

Facts, party statements, analytical conclusions and unknowns are shown separately. Re-check evidence for the date of the specific transaction.

Updated 23 July 2026

In short

A one-off inspection shows condition on a particular day. Maintenance history shows whether the building can identify problems, plan work, appoint competent contractors, close findings and fund replacement before failure. A buyer should look beyond cleanliness and a working lift to repeat failures, response quality and accumulated obligations.

This page does not reproduce the existing field checklist for engineering systems and does not replace a technical survey. It explains which historical records to collect, how to reconcile them with the site visit and how to distinguish preventive asset management from continuous emergency repair.

Current condition and building history answer different questions

An inspection shows what is visible today. Building history explains how an issue arose, how quickly it was found, who owned it, what a contractor did, what it cost and whether it recurred. Good appearance does not exclude deferred work, a temporary repair or a future major cost.

Reconcile observations with work orders, completion records, service agreements, invoices, warranties, incident logs and budgets.

Start with a list of critical systems

List lifts, pumps, backup power, fire systems, water, drainage, roof, façade, common-area cooling, access control and other systems whose failure affects safety or use. For each, record location, model, age, owner, service contract, last inspection, defects, warranty and expected major work.

Where a system is shared with another phase or operator, record the dependency and cost allocation.

Which records to collect for each system

Approved preventive-maintenance schedule and the version applying during the period reviewed.

Work orders, inspections, tests and reading logs.

Invoices, completion certificates, contractor reports and payment evidence.

Failure, emergency call-out and downtime history.

Contractor recommendations, deferred work and declined repairs.

Warranty claims, replaced parts and manufacturer communications.

Retesting and evidence closing findings.

Budgeted and actual expenditure by system.

Contractor changes, reasons and handover records.

Separate preventive, corrective and emergency work

Preventive work is performed by time, usage or condition before failure. Corrective work addresses an identified defect while the system may still operate. Emergency work restores a critical function after failure. If all expenditure is labelled `maintenance`, the buyer cannot tell whether the building prevents failures or only reacts to them.

Ask management to separate the categories and disclose overdue preventive tasks. Repeated emergency call-outs for the same cause, a temporary reset without root-cause correction and continuous deferral of recommended replacement are more concerning than one large invoice for properly planned work.

Review the service agreement, not merely the contractor

The agreement should identify equipment and areas, frequency, preventive work, emergency call-out, response time, parts, exclusions, reports, liability, insurance, renewal and termination. Compare it with actual visits, completion records and invoices.

A recognised contractor does not prove that the necessary scope was paid for or completed. An expired agreement, unpaid invoice or recurring failure needs a separate risk entry.

Use understandable performance evidence

A complex building rating is unnecessary. Use transparent measures for each critical asset: failure count, total downtime, longest outage, proportion of scheduled tasks completed, repeat-defect count, open findings, average response time only where data is adequate, and time to the next major intervention.

A metric without a definition can mislead. ‘99% availability’ means little without a period, exclusions, asset count and calculation method. Preserve the underlying events and methodology rather than a decorative percentage. Where history is incomplete use `insufficient evidence`, not a green score.

Look for recurrence and root-cause analysis

For a material incident record date, affected component, duration, impact on residents and property, temporary control, identified cause, permanent repair, responsible party, cost and retest evidence. If the cause is recorded only as ‘old equipment’ or ‘bad weather’, ask for the failure mechanism and prevention of recurrence.

Several small leaks on one riser, repeated overheating of one panel or frequent stoppage of one lift may indicate a systemic issue. Unrelated events should not be artificially combined. A qualified engineer determines technical causation; NovAsia and the buyer organise the evidence and questions.

Warranty and the transition from developer to operation

In a new building distinguish construction defects, seller or contractor warranties and ordinary maintenance. Request the common-area defect register, notice date, responsible party, deadlines, completed work, rejected claims and residual issues. Cost caused by an original defect should not automatically be transferred into the owners’ ordinary operating budget.

At management handover, determine whether as-built drawings, manuals, commissioning records, warranties, keys, passwords, spare parts, contracts, asset register and open defects were transferred. A handover minute without schedules may be formal and fail to give the new team the information needed for safe operation.

The full transition of governance, bank accounts, contracts, staff, technical archives, keys and access credentials is already covered in a separate canonical NovAsia guide. This page does not repeat the full turnover checklist: for maintenance history the relevant question is which records and obligations actually reached the new operator and which gaps impair continuity.

Major works should appear before failure

Request a major and cyclical works plan across the visible management horizon: lifts and controllers, generator, pumps, fire systems, façade, roof, waterproofing, pool, parking, finishes, access control and other costly items. Each entry needs a rationale, provisional timing, sourced cost range, priority, inspection dependency and funding route.

The plan should not present a distant estimate as a guarantee. Its purpose is to show that management recognises the lifecycle and updates estimates as evidence changes. Absence of an item from the plan does not eliminate future cost. Check particularly whether the most expensive assets were omitted because funding is unavailable.

Connect the technical plan to funding

For every major work compare forecast cost, current reserve, annual contribution, other commitments and expected shortfall. Where the reserve has no component allocation, show which projects compete for the same cash. Do not treat the total fund balance as proof that every replacement is funded.

Review authority to approve a special assessment, notice process, allocation basis and non-payment risk. In a phased project separate tower-specific costs, completed shared facilities, future phases and commercial components. The buyer needs to understand not only an estimated amount but the mechanism that creates the obligation.

Low occupancy changes the meaning of the history

A nearly empty new building may have low equipment hours, few complaints and little repair expenditure. That does not prove strong reliability: lifts, water, drainage, parking and staff have not yet been tested at normal load. At the same time, many critical costs are fixed and do not disappear because units are empty.

Record actual occupancy as a sourced range, unsold-unit share, who pays service charge for those units, subsidy term and the scenario after load increases. Analyse the opening year, transition period and stabilised budget separately.

Separate operations from construction in a phased project

Construction of a later phase may create dust, vibration, road damage, security demand and temporary drainage changes. Record which systems have been handed to residents, which remain under developer control and who pays for damage or additional service caused by construction.

The history of one tower should not be blended with future components. Review separate cost centres, service contracts and responsibility for roads, pumps, gates, pools and utility networks. Where a system is shared, determine present capacity, future load and the contractual cost-allocation mechanism.

How to reconcile history with the site visit

Before the visit list recurring events, open findings and expected works.

On site locate the exact system or area and ask to see the repair outcome rather than remaining in the lobby.

Reconcile equipment labels, contractor and service dates with the register and reports.

Observe available operating conditions within a safe visual review; specialist testing belongs to a qualified professional.

Speak with several residents and staff shifts using specific questions about frequency and downtime.

After the visit update the contradiction log and request close-out evidence for every material mismatch.

When maintenance history requires a pause

Pause the decision where critical equipment has no identifiable service provider; preventive tasks are systematically overdue; the same failures recur without cause analysis; serious recommendations were declined without an alternative; a contract ended because of arrears; manuals and warranties were not handed over; a major replacement is near without funding; or management statements conflict with invoices and logs.

Do not use an attractive discount to obscure technical uncertainty without quantifying it. Define the next action: engineer survey, vendor inspection, written repair quotation, updated plan, contractual retention, allocation of responsibility or withdrawal. Where life safety is involved, a competent professional—not a marketing team—must determine the technical conclusion.

What the building history should contain

For each material event, retain the date, system and location, first signal, urgency, temporary measure, diagnosis, contractor, approval, cost, funding source, completed work, warranty and closure evidence. Show recurring issues and unfinished major work separately.

The result supports a future budget and governance decision rather than one overall condition score.

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