This is Owl Standard's compliance knowledge hub compiled for landlords, covering the full compliance path from subdivided flat (informally called “劏房” in Cantonese) to certified Basic Housing Unit (BHU). We believe landlords should understand the ordinance, standards, and timeline before making any decisions — not be pushed straight into a sales funnel.
A complete guide to the BHU Ordinance and landlord obligations.
Specific technical requirements on floor area, ceiling height, ventilation, and facilities.
Critical dates for legislation, registration, enforcement, and the grace period.
17+ questions and answers on the topics landlords care most about.
Understanding the most common BHU certification failures helps landlords address issues before submission — saving time and money.
Not all subdivided flats can obtain BHU certification. Learn which unit types are ineligible and why — before spending money on an assessment.
BHU ventilation requirements explained: mechanical ventilation specs, air change rates, and what landlords need to know about the most commonly failed certification step.
Internal floor area must be at least 8 sq m (bathroom included) and ceiling height at least 2.3m (measured at lowest point). Includes calculation methods and solutions for non-compliant units.
With 500+ subdivided units under management over 8 years, Owl Square Group shares the 5 most common misconceptions landlords hold about BHU compliance.
Cap. 658 Schedule 1 s.8 requires the electricity meter to be provided by CLP Power or Hongkong Electric specifically for the subdivided unit — an electrician-installed internal sub-meter does not comply. Covers the application process, CLP/HK Electric supply territories, cost and timeline, and what a certification inspection checks.
Cap. 658 Schedule 1 s.3 sets out four fire safety requirements. FD30 fire doors, mandatory annual detector checks, fire extinguishers and escape route standards explained.
There is no official district-average renovation cost survey. What actually drives cost is building age, walk-up access, and building structure — factors that happen to correlate with geography. This article breaks down the real cost drivers across Sham Shui Po, Kwun Tong, Mong Kok, and Yuen Long, with an applicable estimation method.
Hiring a consultant typically adds HKD 5,000–15,000 in coordination fees but saves 20–40 hours of landlord time and reduces rejection risk. A complete cost comparison to help you decide.
The question every landlord asks: what does BHU certification actually cost in total? This guide combines all three stages into one complete picture.
Market cost ranges for fire doors, mechanical ventilation, and independent utilities metering — the three most common BHU renovation items.
A complete breakdown of BHU compliance costs, including HKIS market benchmarks and hidden costs landlords often overlook.
Form BHU-01 is the official Buildings Department application for BHU certification. This guide walks through each section, required attachments and common rejection reasons.
An Authorized Person (AP) is legally central to BHU certification. Learn what APs do, what they're responsible for, and what to look for when selecting one.
From initial assessment to receiving the BHU certificate, a typical case takes 4–8 months. Here's what determines the timeline.
Does BHU certification for a mortgaged property require bank consent? Grace-period registration typically does not. Renovation works depend on your mortgage deed. This guide clarifies owner obligations and the bank's role.
What happens to BHU certification when you inherit a subdivided property? This guide covers probate timelines, executor authority, and practical steps for inherited property landlords.
Landlords with multiple subdivided units in one property face unique strategic decisions. Here's how to prioritise and sequence BHU certification.
Pre-1980 tenement buildings face specific BHU challenges. Here's the checklist of works most commonly required before certification.
A complete guide for mainland China and overseas landlords with Hong Kong subdivided flats who cannot handle compliance procedures in person.
A SoCO survey found 34.6% of surveyed tenants feared their landlord would raise rent or impose extra charges citing BHU certification. This guide clarifies four protections tenants have during the certification process — tenancy terms, notice requirements, rent-control scope, and where to seek help.
BHU penalties aren't just "up to HKD 300,000" — there's also a HKD 20,000 daily continuing fine, two prosecution tiers, and more than just landlords can be charged. A full breakdown of the offence, fine calculation, and how to avoid it entirely.
From Subdivided Unit to Specified Professional, this glossary explains 22 core terms from the Basic Housing Units Ordinance Cap. 658 — including the Housing Bureau vs Buildings Department distinction every landlord must know.
"Subdivided flat" is the everyday term; "BHU" is the formal legal category under Cap. 658. This guide clarifies the distinction, which units are ineligible, and the registration/certification timeline landlords must follow since 2026.
If you start the BHU certification process today, can you realistically complete it before the March 2027 enforcement deadline? The numbers tell the story.
BHU landlords face two compliance approaches. This guide analyses the real costs, risks and conditions of each option to help you decide.
Analysis of OC deed restrictions, their legal weight against BHU ordinance requirements, and three compliance paths available to landlords.
With fewer than 11 months until the 1 March 2027 BHU enforcement date, there are three things landlords must act on immediately.
How the 8 sq m is measured, bathroom inclusion rule, and the 2.3m measurement point.
Natural vs mechanical ventilation routes, technical requirements, and when ventilation cannot be achieved.
Six ineligibility criteria: floor area, ceiling height, ventilation, building type, public housing, and rooftop structures.
The knowledge hub provides general information. For your unit's specific situation, we recommend a direct WhatsApp consultation — get an assessment within 30 minutes.
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