Occupation Permit Application (Hong Kong)

A Hong Kong Occupation Permit Application is a formal application to the Buildings Department (BD) for the issuance of an Occupation Permit (OP) under section 21 of the Buildings Ordinance (Cap. 123), confirming that a building or part of a building has been constructed in compliance with the approved building plans and all applicable statutory requirements, and is fit to be occupied. No person may occupy or permit the occupation of any new building in Hong Kong without a valid Occupation Permit.

Section 21 of the Buildings Ordinance (Cap. 123) establishes the OP as the gateway to lawful occupation of any new building in Hong Kong. The Buildings Ordinance, together with its subsidiary legislation — including the Building (Construction) Regulations (Cap. 123B), the Building (Planning) Regulations (Cap. 123F), and the Building (Standards of Sanitary Fitments, Plumbing, Drainage Works and Latrines) Regulations (Cap. 123I) — sets the technical and planning standards with which a building must comply before occupation is permitted.

The Buildings Department is the statutory body responsible for administering the Buildings Ordinance and processing OP applications. The BD conducts site inspections as part of the OP assessment process and issues the OP only after confirming that all compliance requirements have been met. The BD targets processing of straightforward OP applications within four weeks of receipt of a complete application package.

The Authorised Person (AP) — a registered architect, engineer, or surveyor approved by the BD — is the key professional responsible for the OP application. The AP submits the OP application on behalf of the developer, certifies that the building has been completed in accordance with the approved plans, and coordinates the submission of completion certificates from the Registered Structural Engineer (RSE), Registered Geotechnical Engineer (RGE) where applicable, registered contractors, and other specialists.

For residential property developments subject to the Residential Properties (First-hand Sales) Ordinance (Cap. 621), the OP is a critical milestone — developers cannot hand over units to purchasers without an OP, and certain post-sale obligations under pre-sale and sale and purchase agreements are linked to OP issuance. The Buildings Department publishes information about OPs on its BRAVO online system, and the Companies Registry's ICRIS system includes searchable BD records for property due diligence.

Hong Kong's building control regime under Cap. 123 is regarded as one of the most rigorous in Asia. The Buildings Department employs Authorized Persons (APs) — registered architects, engineers, and surveyors — as the primary interface between the development industry and the BD. APs bear professional responsibility for certifying that completed buildings comply with the Buildings Ordinance and its subsidiary regulations. Section 4 of Cap. 123 sets out the registration requirements for Authorized Persons maintained on the Buildings Department's approved practitioners list. Section 14 of Cap. 123 governs the submission of building plans and the BD's powers of approval or rejection. Under the Minor Works Control System introduced in 2010, certain smaller-scale building works may proceed without full plan approval, but these works remain subject to compliance certification and the Occupation Permit requirement for new buildings is unaffected. The Fire Services Department (FSD), the Electrical and Mechanical Services Department (EMSD), the Drainage Services Department (DSD), and the Water Supplies Department (WSD) are key parties agencies whose certifications are mandatory prerequisites for OP issuance.

A Hong Kong Occupation Permit Application is required whenever a new building — or an existing building that has undergone substantive authorised alteration and addition works — is ready for occupation after completion of construction. The Buildings Ordinance (Cap. 123) mandates that an OP must be obtained before any part of a new building is occupied.

Property developers completing residential or commercial building projects must apply for the OP as the final statutory step before handing over completed units or floors to purchasers, tenants, or their own occupying businesses. For large residential developments sold off-plan under the Residential Properties (First-hand Sales) Ordinance (Cap. 621), the OP or Temporary Occupation Permit (TOP) is the trigger for completion of individual flat sales.

Industrial and commercial building owners completing new construction or major redevelopment must obtain an OP before their tenants, employees, or business operations can lawfully occupy the premises. Operating an industrial or commercial building without an OP exposes the owner and occupier to criminal liability under Cap. 123.

Building owners who have completed major authorised alteration and addition (A&A) works — such as adding new floors, converting uses, or making structural modifications — may need to apply for a new or revised OP for the affected portions of the building once the A&A works are complete.

The OP application process must be initiated only after all the required completion certificates, compliance confirmations, and specialist certifications have been assembled. Common delays in OP issuance arise from outstanding fire service installation certificates, incomplete drainage connections, or uncertified lift installations — each of which must be in order before the BD will issue the OP.

There is no minimum or maximum building size threshold — the OP requirement under section 21 of the Buildings Ordinance applies to all new buildings regardless of size, from a single residential house to a multi-tower residential complex. Village houses built under the New Territories Small House Policy may have different building approval requirements but are nonetheless subject to occupation permit or occupation permit equivalent requirements.

Developers and building owners should monitor the Buildings Department's target processing times and track their application status through the BD's BRAVO system. Pre-submission consultation with the BD — available for complex projects — can identify potential compliance issues before the formal OP application is submitted, reducing the risk of deficiency notices that delay issuance. Solicitors and surveyors advising on property transactions regularly conduct BD record searches to verify OP status as part of their due diligence obligations, since an undetected absence of an OP can render a property transaction voidable and the property unmortgageable.

A complete Hong Kong Occupation Permit Application package must satisfy all the submission requirements of the Buildings Department (BD) under section 21 of the Buildings Ordinance (Cap. 123). Missing or incomplete submissions will result in the BD withholding the OP pending rectification.

The OP application form (BSPA 1) completed and signed by the Authorised Person (AP) is the primary document. The AP certifies in the application that the building has been completed and that the required completion certificates and other documents have been obtained.

The AP's completion certificate (Form BA14) is submitted by the AP to certify that the architectural and building works have been completed in accordance with the building plans approved by the BD under the Buildings Ordinance. The BA14 is the AP's professional certification of compliance.

The Registered Structural Engineer's completion certificate (Form BA15) certifies that the structural design and construction of the building comply with the structural requirements of the Buildings Ordinance and the Building (Construction) Regulations (Cap. 123B). For buildings with geotechnical works (slope stabilisation, retaining walls, or pile foundations), a completion certificate from the Registered Geotechnical Engineer (RGE) is also required.

Specialist contractor certificates must be obtained from: registered general building contractors for general construction; registered drainage contractors for drainage and sewage works; registered electrical contractors (Electrical and Mechanical Services Department Form WR2) for electrical installations; and registered fire service installation contractors (Fire Services Department Form FSD 96) for the fire protection systems.

The lift completion certificate from the Electrical and Mechanical Services Department (EMSD) is required for any building with lifts. The EMSD inspects and certifies the lift installation as safe for operation before the OP can be issued.

The drainage connection approval from the Drainage Services Department (DSD) confirms that the building's drainage and sewage systems have been connected to the public drainage infrastructure in accordance with the approved drainage plans.

Fire Services Department records must confirm that all required fire service installations — including fire hydrant systems, sprinkler systems, fire alarm systems, and fire escape routes — have been completed, inspected, and certified compliant with the Fire Services Ordinance (Cap. 95) requirements.

For residential buildings, the formal agreement for sale and purchase (ASP) and related pre-sale arrangements under the Residential Properties (First-hand Sales) Ordinance (Cap. 621) will reference the OP as the trigger for certain post-completion obligations. The developer's solicitors track OP issuance closely for conveyancing purposes. The Drainage Services Department (DSD) drainage connection approval and the Water Supplies Department (WSD) water supply connection are additional prerequisites that must be completed before the BD will issue the OP for most residential and commercial developments. The forms-legal.com Occupation Permit Application template is designed for Hong Kong developments under section 21 of the Buildings Ordinance (Cap. 123) and pairs with the Building Plans Submission and Agreement for Sale and Purchase documents available on the platform. The forms-legal.com Occupation Permit Application template is designed for Hong Kong developments under section 21 of the Buildings Ordinance (Cap. 123) and pairs with the Building Plans Submission and Agreement for Sale and Purchase documents available on the platform. The AP should confirm in writing to the developer client that all prerequisite certifications from the Fire Services Department (FSD), Electrical and Mechanical Services Department (EMSD), Drainage Services Department (DSD), and Water Supplies Department (WSD) have been received before submitting the OP application to the Buildings Department. Submitting an incomplete OP application package prolongs the processing timeline and delays the developer's ability to complete sales and generate revenue from the completed development.