HKIA/ARB PA Paper 4 cheat sheet

Paper 4 of the HKIA/ARB Professional Assessment is the final stage before registration; it is assessed by the Joint Professional Assessment Panel and follows Papers 1–3 plus the Case Study.

Paper 4 is a written paper built around a project scenario issued to candidates in advance; questions test professional judgement applied to that scenario rather than recall of ordinance text.

Answers are marked against the four core competencies: professional knowledge, professional judgement, communication of solutions, and awareness of statutory and ethical obligations.

The statutory backbone is the Buildings Ordinance (Cap 123), the Architects Registration Ordinance (Cap 408), and the ARB's Code of Professional Conduct.

Buildings Department submission types: BP (building plans), GB (general building plans), and superstructure plans, each with its own prescribed plan and calculation content.

Practice note framework: PNAP (Practice Note for Authorized Persons, Registered Structural Engineers and Registered Geotechnical Engineers) and ADV (Advisory Letters) carry BD's current administrative requirements.

A Registered Architect may only be the AP for building works where the project falls within the scope permitted by the Buildings Ordinance and the AP/RSE/RC appointment rules.

Typical Paper 4 question stems require identifying the applicable statutory instrument, the approving authority, and the submission or consent route before proposing a design answer.

Building works require either prior approval of plans under s.14(1) BO or, for exempted works, no submission; minor works follow the simplified requirements under the Minor Works Control System (MWCS).

Commencement of building works requires consent under s.14(1) BO; consent lapses if works do not start within the prescribed period stated in the consent.

Occupation approval: an Occupation Permit (OP) under s.21 BO is needed before a building or part is occupied; temporary occupation may be permitted by the Building Authority in defined circumstances.

Alteration and addition (A&A) works are assessed on the same plan-submission basis as new works when they affect structure, means of escape, or fire safety provisions.

Demolition requires a demolition plan submission and, where applicable, a demolition strategy addressing stability, protection of adjoining property, and temporary works.

Street works and drainage connections require separate submission routes coordinated with the Buildings Department, Highways Department, and Drainage Services Department.

The Building Authority may refuse plans under s.16 BO and may impose conditions; approval does not confer exemption from other ordinances or from lease conditions.

Certificates of completion and compliance documentation must be lodged before an OP is granted for the relevant building works.

Means of escape is governed by the Code of Practice for Fire Safety in Buildings; travel distance, exit width, and exit number are assessed per occupancy type and storey.

Exit route components: exit door, protected lobby, protected corridor, staircase, and final exit; each has prescribed fire-resisting construction periods.

Dead-end travel and single-direction travel are restricted; the permitted length depends on occupancy risk and whether sprinklers are provided.

Staircase discharge capacity is computed from the occupant capacity of the floors served, using the prescribed exit width per person for the occupancy.

Refuge floors are required in high-rise buildings above the height threshold set in the Code, with prescribed refuge area and protected approach.

Fire-resisting construction periods for elements of construction are tabulated against building height and occupancy; the table, not a rule of thumb, governs.

Access for firefighting: firefighting shaft, fireman's lift, rising main, and vehicular access requirements are triggered by building height and volume thresholds.

Alternative approaches may be accepted by the Building Authority where literal compliance is impractical, but require a fire engineering assessment and documented justification.

Site classification (Class A, B, C and special classes) determines the permitted site coverage and plot ratio under the Building (Planning) Regulations.

Site coverage is the area of the building projected onto the site divided by site area; plot ratio is total gross floor area divided by site area.

Domestic and non-domestic plot ratios are capped differently, and the caps are further modified by building height bands introduced through the sustainable building design framework.

Gross floor area exclusions (e.g. certain plant rooms, refuse rooms, specified recreational areas) are listed in the regulations and PNAPs; exclusions are conditional, not automatic.

Setback, building separation, and site permeability requirements apply to prescribed building types and are linked to the sustainable building design provisions.

Open space and landscaping requirements are computed against site area or GFA and must be shown on the general building plans.

Street widening and dedication may be required as a condition of plan approval where the site abuts a road designated for widening.

Lease conditions can be more restrictive than the Buildings Ordinance; the more onerous of the two governs the achievable envelope.

Standard Hong Kong building contracts include lump sum, remeasurement, and design-and-build forms; the choice determines how risk is allocated for quantity variation.

The HKIA Standard Form of Contract provisions on interim certificates, retention, and practical completion mirror the certifier's role under the contract, not the ordinance.

Practical completion triggers the defects liability period; the architect issues the certificate and administers the defects list until the maintenance certificate.

Variations require written instruction; a contractor's claim for additional payment depends on notice periods and the valuation rules in the contract.

Extension of time is determined by the architect against the specified causes of delay; concurrent delay treatment depends on the contract wording.

Security of payment legislation in Hong Kong imposes payment response and adjudication timelines that run alongside the contract's certification process.

Professional indemnity insurance and the limitation period for negligence claims affect the architect's exposure independently of the building contract.

The ARB Code of Professional Conduct requires competence only within the architect's own field and disclosure of any conflict of interest.

An architect must not accept remuneration from both the client and a contractor or supplier for the same project without full written disclosure and consent.

Advertising and publicity must not be misleading or comparative in a way that disparages other architects; practice names and descriptions are regulated.

Confidentiality of client information survives the end of the appointment, subject to legal disclosure obligations.

An architect certifying payments or completion must act independently; certifying work not actually executed is a disciplinary matter.

Continuing professional development is a registration requirement; the ARB prescribes the annual CPD hours and the record-keeping obligation.

Disciplinary proceedings before the Architects Registration Board may result in removal from the register; the architect has a right of appeal to the court.

Graded historic buildings (Grade 1, 2, 3) have no automatic statutory protection; protection arises through the Antiquities and Monuments Ordinance or lease/planning conditions.

A declared monument requires a permit from the Antiquities Authority before any works, including works that affect its setting.

Environmental impact: designated projects under the Environmental Impact Assessment Ordinance require an approved EIA and environmental permit before construction.

Air pollution, noise, and waste controls (APCO, Noise Control Ordinance, Waste Disposal Ordinance) apply to construction activity independently of building plan approval.

Tree removal and landscape impact are addressed through the registration of old and valuable trees and through lease and planning conditions.

Accessibility requirements under the Design Manual: Barrier Free Access apply to new buildings and to alteration works of the prescribed scope.

Energy efficiency requirements under the Building (Energy Efficiency) Regulation apply to prescribed building services installations and are checked at plan stage.

Structure answers to the stem's verbs: identify, explain, evaluate, recommend; a recommendation without stated criteria earns limited marks.

Cite the instrument by name and section or code clause where known; a correct conclusion with no authority is weaker than one with a named basis.

Where the scenario is silent on a fact, state the assumption explicitly and answer on that basis rather than hedging across all possibilities.

For conflict questions, rank the applicable controls and state which prevails and why (ordinance overrides code guidance; lease may override ordinance permissions).

Use labelled diagrams and tables where the question asks for layout, route, or comparison; a clear diagram can carry a substantial share of marks.

Time allocation follows mark weighting: a question worth more marks needs proportionally more substance, not more length of introduction.

Numerical answers should show the formula, the substituted values, and the unit; an unlabelled figure risks zero even when the arithmetic is right.