DIY Application vs Hiring a Consultant
The True Cost of BHU Certification
For most Hong Kong landlords, hiring a consultant delivers better value than DIY — the coordination fee is typically recovered within two months of time saved, and the risk of a rejected application narrows. DIY is genuinely worthwhile only if you have a building management or administrative background and can commit 20–40 hours to the process.
| Factor | DIY | Consultant |
|---|---|---|
| Coordination fee | None (HKD 0) | HKD 5,000–15,000 |
| Landlord time commitment | 20–40 hours | 3–8 hours |
| AP arrangement | Source 3–5 quotes independently | Consultant arranges directly |
| Rejection follow-up | Landlord handles re-submission | Consultant manages |
| Best suited for | Landlords with time and admin experience | Most landlords |
Which Approach Suits You?
The right choice depends on your time, background and proximity to the 2027 deadline. Both routes lead to the same outcome — a certified BHU — but the path looks very different.
- Building or property management background
- Plenty of free time (20–40 hours available)
- Comfortable with bureaucratic paperwork and follow-up
- Local and available for site access and BD queries
- Most landlords — especially overseas-based
- Multiple units requiring certification
- Approaching the February 2027 registration deadline
- No prior experience with BD application submissions
The DIY Route — Full Process and Time Breakdown
Going DIY means managing every step yourself. Here is what that involves, with realistic time estimates:
Find and Commission an Authorized Person
5–10 hours — requires sourcing 3–5 quotes, verifying AP registration with the Buildings Department, and negotiating scope and fees.
AP On-Site Assessment
Arranged by the AP — but you must coordinate access for all tenanted units and be available on the day. Allow 2–4 hours for coordination.
Prepare BHU-01 Form and All Attachments
10–20 hours — the hardest and most error-prone step. Required attachments include measured floor plans, a floor area calculation report, a ventilation calculation report, bathroom dimension drawings, and the AP's certification statements.
Submit to Buildings Department and Await Response
2–6 months — the BD processing period. No active work required, but you must be responsive to any queries from the department.
Follow Up on Queries and Arrange Renovation Works
5–10 hours — responding to BD queries, coordinating any required renovation (e.g. fire door installation, ventilation upgrade), and confirming completion to the AP.
⚠️ The Three BHU-01 Sections Most Commonly Causing Rejections
- Insufficient explanation of floor area calculation methodology
- Ventilation calculation report format not meeting BD requirements
- Missing or incorrect bathroom dimensions in drawings
The Consultant Route — What the Fee Covers
A coordination fee of HKD 5,000–15,000 (or 10–20% of total AP and renovation costs) typically covers:
- Sourcing and engaging a suitable AP on your behalf
- Preparing all BHU-01 attachments to BD format standards
- Submitting the application and managing all BD correspondence
- Following up on any queries or requests for additional information
- Coordinating renovation contractors and AP sign-off
The total cost may not be much higher than DIY. Consultants with established AP relationships often negotiate better rates than landlords commissioning APs independently — particularly for multi-unit submissions where the AP's per-unit cost drops.
| Cost Item | DIY | With Consultant |
|---|---|---|
| AP certification fee (3–4 units) | from HKD 15,000 | from HKD 13,000–15,000 |
| Renovation (per unit, mid-range) | HKD 45,000–75,000 | HKD 45,000–75,000 |
| BD application fee (HKD 3,000 × 3) | HKD 9,000 | HKD 9,000 |
| Compliance assessment | from HKD 3,000 | from HKD 3,000 |
| Consultant coordination fee | — | HKD 8,000–15,000 |
| Estimated total | HKD 72,000–102,000 | HKD 78,000–117,000 |
Figures are estimates based on current market rates and assume a first-time approval. Renovation costs vary significantly by unit condition.
According to the Buildings Department, applications submitted with professional coordination have a significantly higher first-time approval rate than those submitted independently by landlords.
The Real Cost of a Rejected Application
Rejection is the hidden risk that erodes the DIY saving — and with the March 2027 enforcement deadline approaching, a delay of 2–4 months is not merely inconvenient.
Cost of a Single Rejected Application
- New BD application fee: HKD 3,000 per unit (paid again)
- AP revisit fee (if on-site data errors): HKD 1,500–3,000
- Additional document preparation: HKD 500–2,000
- Processing delay: 2–4 months
- Total additional cost: HKD 3,000–8,000 per unit
Without professional help, industry estimates put the first-application rejection rate at 30–40%. At that rate, roughly one in three landlords going DIY will face an additional outlay of HKD 3,000–8,000 per unit — which entirely eliminates the coordination fee saving of HKD 5,000–15,000.
The time pressure compounds this. March 2027 is the enforcement date: HKD 300,000 fine and up to 3 years' imprisonment for non-compliant landlords. A single rejected application cycle consumes 2–4 months that many landlords cannot afford to lose.
Frequently Asked Questions
What does the DIY BHU certification process involve?
You need to find an Authorized Person (AP) independently, commission the AP for an assessment, prepare the BHU-01 application form and all required attachments (floor plans, measurement reports, ventilation calculations), submit to the Buildings Department, follow up on the application, and arrange any renovation works. The process typically requires 20–40 hours of landlord time.
How much cheaper is DIY compared to hiring a consultant?
DIY can save the consultant coordination fee, typically 10–20% of the total project cost or approximately HKD 5,000–15,000 depending on the number of units. However, if an application is rejected and must be resubmitted, the additional cost of HKD 3,000–8,000 can offset most of the savings.
Can I apply for BHU certification myself without a building or legal background?
Technically yes — landlords can commission an AP and prepare documents themselves. In practice, the BHU-01 application has complex attachment requirements: errors in floor area calculations, ventilation calculation formats, or bathroom drawings are common rejection reasons. Landlords without administrative and building documentation experience typically take longer and face a higher rejection risk.
How much do consultants charge for BHU certification coordination?
Fees vary by scope. Most consultants charge 10–20% of the AP and renovation fees combined, or a fixed fee of HKD 5,000–15,000. Some consultants have established relationships with APs and can offer competitive overall pricing compared with landlords commissioning APs independently.
Do I need to pay again if my application is rejected?
Yes. After a Buildings Department rejection, a new application must be filed with the fee paid again. If the rejection involves on-site data errors, the AP must revisit at a cost of HKD 1,500–3,000. The total delay is typically 2–4 months.