BHU Certification for
Mortgaged Properties
Most Hong Kong mortgage deeds include a covenant prohibiting material alterations without the mortgagee's written consent. Before starting BHU compliance renovation works, mortgaged property landlords need to understand which works require bank approval, how to apply, and how this affects their path to 2027 certification.
| Step | Bank Consent Required? | Notes |
|---|---|---|
| Grace period registration (with Buildings Department) | No | Administrative process — no physical works |
| Authorized Person compliance assessment | No | Assessment only — no alterations |
| Non-structural installation (fire doors, mech. ventilation, sub-metering) | Usually yes | Check your mortgage deed first |
| Structural works (partition removal, unit merging) | Yes | Required under virtually all mortgage deeds |
Source: Subdivided Units Ordinance (Cap. 658); mortgage deed terms vary by lender — consult your mortgage documents.
What Is the "Alteration Covenant" in a Hong Kong Mortgage Deed?
Standard Hong Kong mortgage deeds contain a covenant that restricts the mortgagor (property owner) from making material alterations to the property without first obtaining the mortgagee's (bank's) written consent. This covenant exists to protect the bank's collateral — the property must retain its value and structural integrity for the duration of the loan.
BHU compliance renovation typically falls squarely within the scope of this covenant. Works such as the installation of fire-rated doors, mechanical ventilation systems, separate utility sub-metering, and any partition or structural modifications are considered material alterations under most standard mortgage terms.
Importantly, not all compliance steps trigger this requirement. Administrative steps — including registering for the grace period with the Buildings Department and commissioning an Authorized Person (AP) compliance assessment — do not constitute physical alterations to the property and therefore do not require bank consent.
⚠️ Common Misunderstanding
Because BHU compliance works are legally required, some landlords assume they do not need to apply for bank consent — that is incorrect. The alteration covenant applies to all material works, including statutory compliance works. Proceeding without consent may trigger a breach of mortgage terms.
Will the Bank Actually Refuse?
In practice, banks almost universally approve applications for BHU compliance renovation works. This is not simply goodwill — it is in the bank's direct interest to do so:
- Enforcement risk (HKD 300,000 fine and imprisonment) undermines the mortgagor's financial position and ability to service the loan.
- After March 2027, unregistered BHUs face enforcement, directly damaging the rental income that services the mortgage and the property's value as collateral. (Grace period registered units may continue to operate until February 2030.)
- Banks have a common law obligation to act reasonably when exercising rights under a mortgage deed.
- Legally mandated works
- Enforcement risk = collateral risk
- Non-compliance = no rental income
- Obligation to act reasonably
- Written scope of works
- AP report confirming compliance purpose
- Revaluation for major structural changes
- Post-completion records update
⚠️ Based on Owl Square Group's case records
Approval rate for BHU compliance consent applications approaches 100%. The most common source of delay is incomplete applications — landlords who cannot clearly describe the scope of works are asked to provide additional information, extending the review period.
How to Apply for Bank Consent: Step by Step
-
Review your mortgage deed
Locate the alteration covenant and note the exact wording. If you no longer hold a copy, request one from the bank or your solicitor. Understanding the precise contractual obligation determines what consent you need to obtain. -
Commission an AP assessment
Obtain a written report from an Authorized Person defining the scope of works required for BHU compliance. This report is the single most important document in your bank consent application — it establishes that the works are statutory compliance works, not discretionary renovations. -
Submit written application to the bank's mortgage or property management department
Attach the AP report and a clear description of the proposed works. Address the application to the correct department; many banks have dedicated property or mortgage services teams for this type of request. -
Bank review period
Typical processing time is 2–4 weeks. Respond promptly to any bank queries or requests for additional information to avoid extending this period. Keep all correspondence in writing. -
Receive written consent, then proceed to engage contractors
Do not commence any physical works before you hold the bank's written consent. Retain this document as part of your BHU compliance records alongside the AP report and contractor invoices.
⚠️ Timeline Alert
The grace period registration deadline is February 2027; the full certification deadline is February 2030. To complete renovation well ahead of the 2030 deadline, works must typically be completed by September 2026. This means a bank consent application should be submitted by August 2026 at the latest. Every month of delay reduces your margin.
Realistic Total Certification Timeline for Mortgaged Property Landlords
Mortgaged property landlords face an additional step in the certification process that most landlords do not. When mapped against the March 2027 enforcement deadline, the cumulative timeline is already very tight:
2–6 weeks
The AP inspects the property, assesses compliance requirements, and prepares a written report defining the scope of works. This report is required before the bank consent application can be submitted.
2–4 weeks
Submission of written application with AP report attached. Most banks respond within this window, though incomplete applications routinely extend the period by a further 2–4 weeks.
4–12 weeks
Duration depends on the extent of works required. Multiple units in the same property can often be completed in parallel to reduce total time. Contractor availability in 2026 will be constrained as the industry-wide deadline approaches.
8–16 weeks
After works are completed, the AP submits documentation to the Buildings Department for review. Certificate issuance timelines are expected to lengthen as the 2027 deadline approaches and submission volumes increase.
Combined, the end-to-end certification process for a mortgaged property landlord takes 5–10 months from the point of first engaging an AP. Against a March 2027 enforcement deadline, any landlord who has not yet started is already operating with very limited margin.
Landlords with mortgaged properties should treat the bank consent application as an urgent first priority — not a step to address after the AP assessment is complete, but something to plan for in parallel from day one.
Frequently Asked Questions
Do mortgaged property landlords need bank consent for BHU compliance renovation works?
It depends on the mortgage deed. Most standard Hong Kong mortgage deeds contain an alteration covenant requiring the mortgagor to obtain the mortgagee's written consent before making material changes to the property. BHU compliance works — including fire door installation, mechanical ventilation, and utilities sub-metering — typically qualify as material alterations. However, registering for the grace period and commissioning an AP assessment do not involve physical works and do not require bank consent.
Will banks refuse to approve BHU compliance renovation applications?
Rarely. Banks almost universally approve applications for legally mandated compliance works. Refusing would expose the property to enforcement risk (HKD 300,000 fine + 3 years imprisonment), and after 2027, unregistered BHUs face enforcement — directly undermining the property's value as collateral. Landlords should still apply in advance, since bank processing typically takes 2–4 weeks and will affect the renovation schedule if left too late.
Who is responsible for BHU compliance on a mortgaged property — the landlord or the bank?
The landlord (mortgagor) is solely responsible. According to the Buildings Department, BHU compliance obligations rest with the property owner, not the mortgagee. However, if a landlord fails to comply and faces enforcement action, this may trigger default clauses in the mortgage deed, affecting the landlord-bank relationship and potentially the entire loan.
What happens if a landlord proceeds with works without bank consent?
This may trigger the breach of covenant provisions in the mortgage deed. In serious cases, the bank may demand early repayment of the outstanding loan. Even if the works are for BHU compliance, proceeding without prior written consent is a procedural breach. Landlords should obtain written approval before starting any works and retain all correspondence.
Will the bank require a property revaluation after BHU compliance works?
It depends on the scale of works. Minor installations (fire doors, mechanical ventilation systems) typically do not trigger a revaluation requirement. If works involve major structural changes — such as merging two units — the bank may request a post-completion valuation to confirm the collateral value has not been affected. Landlords can ask the bank upfront when submitting the consent application to avoid surprises later.