Specified Professional vs "Authorized Person (AP)": Who Signs Off Your BHU Certification Report
What a landlord actually needs is not an "Authorized Person (AP)" but a specified professional as defined in Schedule 3 of the Basic Housing Units Ordinance (Cap. 658): a Registered Architect, a Registered Professional Engineer in one of five named disciplines, or a Registered Professional Surveyor in the Building Surveying Division. The two terms come from different ordinances and overlap in practice, but they are not interchangeable — and assuming they are narrows your options and usually raises your cost. How quickly that professional works directly affects whether you can meet the deadlines on the BHU compliance timeline.
| Item | Detail |
|---|---|
| Legal Role | Specified Professional (指明專業人士) — the person who must make the report required by s.17(1)(c)(ii) |
| Statutory Categories (Schedule 3) | (1) Registered Architect (Cap. 408) · (2) Registered Professional Engineer (Cap. 409) in the building, building services, civil, fire or structural discipline · (3) Registered Professional Surveyor (Cap. 417) in the Building Surveying Division |
| "Authorized Person (AP)" | A registration category under the Buildings Ordinance (Cap. 123), not a Schedule 3 term. An AP usually also holds one of the registrations above — but the two are not automatically equivalent |
| Core Duties | On-site inspection (s.17(2)) · Certification report · Support the landlord's application |
| Cost Reference | Assessment + report: HKD 8,000–20,000 (varies by unit count) |
Source: Basic Housing Units Ordinance (Cap. 658), s.17 and Schedule 3 · Housing Bureau Code of Practice on Minimum Standards of Living Conditions for BHU
"AP" vs "Specified Professional" — Two Terms From Two Different Ordinances
The legal term used in the BHU Ordinance is Specified Professional (指明專業人士) — not "Authorized Person". Schedule 3 of Cap. 658 lists exactly three categories of person who may act as a specified professional:
- Registered Architect — a person on the register of registered architects referred to in s.8(a) of the Architects Registration Ordinance (Cap. 408)
- Registered Professional Engineer — a person on the register referred to in s.7(a) of the Engineers Registration Ordinance (Cap. 409), in the building, building services, civil, fire or structural discipline
- Registered Professional Surveyor — a person on the register referred to in s.7(a) of the Surveyors Registration Ordinance (Cap. 417), in the Building Surveying Division
So where does "Authorized Person" come from? An AP is a registration category under the Buildings Ordinance (Cap. 123), as are the Registered Structural Engineer (RSE) and Registered Geotechnical Engineer (RGE) — none of these three is a term used in Schedule 3. The reason landlords hear "you need an AP" is that the two largely overlap in practice: an AP is typically an architect or engineer who would also satisfy one of the Schedule 3 categories.
Overlap is not equivalence. Holding an AP registration does not by itself satisfy Cap. 658 — what matters is whether the person appears on one of the registers named in Schedule 3. Conversely, a Registered Professional Surveyor in the Building Surveying Division can act as a specified professional whether or not they are also an AP. A landlord who searches only for "an AP" is narrowing the field unnecessarily, and usually paying more for it.
⚠️ The Landlord Applies — But Cannot Write the Report
Under s.17(1)(a), the application is made by the owner of the principal flat, or by any person with the owner's written consent — so the applicant is the landlord. But s.17(1)(c)(ii) requires the application to be accompanied by a report made by a specified professional, certifying that the unit meets the minimum standards of living conditions and that liability under all specified statutory orders, notices or directions has been discharged. Section 17(2) adds that the report must be based on a site inspection carried out or arranged by that professional. Without that report, the application does not meet s.17(1).
The Specified Professional's 5 Core Duties in the BHU Process
Once engaged, the specified professional takes on a defined set of responsibilities from first visit to certification:
- Site inspection — a statutory requirement under s.17(2), not an optional courtesy: measure floor area, ceiling height and ventilation, and document the current physical condition of each unit
- Technical assessment — compare each unit against all 8 requirements in Schedule 1; identify any areas of non-compliance and their severity
- Renovation advisory — recommend compliance works where required; help the landlord understand scope, priority and cost implications before committing to any works
- Certification report — make the report required by s.17(1)(c)(ii), for the landlord to submit to the Housing Bureau with Form BHU-01 and all required attachments
- Follow-up — respond to Housing Bureau queries and supplementary information requests on behalf of the landlord until certification is granted
⚠️ The Report Is Signed — and Liability Follows
The specified professional who makes the report takes professional responsibility for its accuracy. Choose someone with professional indemnity insurance — and confirm coverage before signing any engagement letter.
5 Questions to Ask Before Appointing a Specified Professional (AP or Otherwise)
Not everyone who qualifies under Schedule 3 has BHU-specific experience — and not everyone marketing themselves as "an AP" necessarily falls within Schedule 3. The following questions will help you assess both:
Which Schedule 3 category do you fall under?
Ask them to state plainly whether they are a Registered Architect (Cap. 408), a Registered Professional Engineer (Cap. 409) in the building, building services, civil, fire or structural discipline, or a Registered Professional Surveyor (Cap. 417) in the Building Surveying Division — and to give you a registration number you can check against the relevant register yourself. Note that the Buildings Department's list of Authorized Persons confirms Cap. 123 status, not Schedule 3 eligibility.
How many BHU certifications have you handled?
Experienced professionals anticipate rejection risks, prepare documentation correctly on first submission, and reduce back-and-forth with the Housing Bureau. This directly affects your timeline.
Does the quote include application filing and supplementary submissions?
Initial assessment and application-support fees should be itemised separately. Some quotes cover only the assessment — and add fees at each subsequent stage. Get full-scope pricing in writing before engaging.
Will you carry out or arrange the site inspection yourself?
Section 17(2) requires the report to be prepared on the basis of a site inspection carried out or arranged by the specified professional. A report built from landlord-supplied photographs or descriptions alone does not satisfy s.17(1)(c)(ii).
What is your professional indemnity insurance coverage?
Minimum HKD 2 million is standard industry expectation. The professional carries liability for the accuracy of the report — adequate insurance protects both sides if a dispute arises.
⚠️ Real Case
A landlord chose the lowest-quoted professional (HKD 5,000 assessment fee). Unfamiliarity with the BHU Ordinance led to two rejections of the submission. The final timeline was extended by 4 months — and the additional costs incurred from resubmissions, revised reports and extended void periods exceeded the original price difference several times over.
Specified Professional Cost Structure and Market Reference
What the market calls "AP fees" is really the specified professional's service fee. According to market data from Owl Square Group's procurement records, typical costs for BHU certification break down as follows:
- On-site assessment and technical report: HKD 8,000–20,000 — add HKD 2,000–3,000 per additional unit beyond the first
- Preparing and filing Form BHU-01: HKD 3,000–8,000 — some quotes include this within the assessment fee; confirm at quotation stage
- Responding to Housing Bureau supplementary requests: HKD 2,000–5,000 per round — additional rounds are common when documentation is incomplete on first submission
- Renovation supervision and sign-off report: HKD 3,000–8,000 — applies where compliance works are required before certification can be granted
Note: These fees are not government-regulated. The HKIS publishes non-binding reference schedules, but these carry no legal force. Always request an itemised written quotation before engaging any specified professional.
Frequently Asked Questions
Is an Authorized Person (AP) legally required for BHU certification?
Not specifically an AP. Section 17(1)(c)(ii) of the Basic Housing Units Ordinance (Cap. 658) requires a certification application to be accompanied by a report made by a specified professional, and Schedule 3 lists only three categories: a Registered Architect (Cap. 408), a Registered Professional Engineer (Cap. 409) in the building, building services, civil, fire or structural discipline, and a Registered Professional Surveyor (Cap. 417) in the Building Surveying Division. "Authorized Person" is a registration category under the Buildings Ordinance (Cap. 123) and does not appear in Schedule 3. In practice most APs also hold one of those registrations, which is why the terms are often treated as one — but in law they are not the same.
What is the difference between an "AP" and a "Specified Professional"?
They come from different ordinances. "Specified Professional" is the statutory term in the Basic Housing Units Ordinance (Cap. 658), defined by Schedule 3 as three registration categories: a Registered Architect, a Registered Professional Engineer in a named discipline, and a Registered Professional Surveyor in the Building Surveying Division. "Authorized Person" is a registration category under the Buildings Ordinance (Cap. 123), alongside Registered Structural Engineer (RSE) and Registered Geotechnical Engineer (RGE) — none of which appears in Schedule 3. The two overlap heavily in practice, because an AP is usually an architect or engineer who also meets a Schedule 3 category, but holding an AP registration does not by itself satisfy Cap. 658. What matters is whether the person is on one of the registers named in Schedule 3.
How can I verify that an AP is registered with the Buildings Department?
Check the List of Authorized Persons, Registered Structural Engineers and Registered Geotechnical Engineers on the Buildings Department website (www.bd.gov.hk), searching by name or registration number. Note what that list does and does not tell you: it confirms Authorized Person status under the Buildings Ordinance (Cap. 123), not eligibility under Schedule 3 of Cap. 658. To confirm that someone can act as a specified professional, check the relevant register instead — registered architects (Cap. 408), registered professional engineers (Cap. 409, in the building, building services, civil, fire or structural discipline), or registered professional surveyors (Cap. 417, in the Building Surveying Division).
Can a landlord apply for BHU certification without an AP?
The landlord is the applicant. Section 17(1)(a) provides that a certification application is made by the owner of the principal flat of the subdivided unit, or by any person with that owner's written consent. But s.17(1)(c)(ii) requires the application to be accompanied by a report made by a specified professional, certifying that the unit meets the minimum standards of living conditions and that liability under all specified statutory orders, notices or directions has been discharged — and s.17(2) requires that report to be based on a site inspection carried out or arranged by that professional. So a landlord can be the applicant but cannot produce the report. The person who makes it need not be an AP: any of the three Schedule 3 categories qualifies.
Are specified professional fees regulated by the government?
Fees for BHU work — what the market usually calls "AP fees" — are not government-regulated. The Hong Kong Institute of Surveyors (HKIS) and other professional bodies publish non-binding fee reference schedules, but these are not mandatory. Request an itemised written quotation covering each stage separately: assessment, preparing the report and application, supplementary submissions, and any renovation sign-off.