Central Plaza — Office Fit-Out in a Grade A Wan Chai Tower
In a 78-storey managed tower, the design is constrained long before the first sketch: by the tenancy, the landlord's fit-out guide, the base building services and a clear height of about 2.36 metres. See the approval route, services coordination, or request a quotation.
Interior design project by D-8 Limited at Central Plaza, Hong Kong.
D-8 Limited is an integrated design firm on interior design. It emphasizes on details in its design philosophy, which could be reflected on both the user experience and form of its works. As an evolving design studio, it offers animation visualization as an advanced presentation tool for their client to easily understand the design and outcome in a more comprehensive way.
Commercial fit-out rewards documentation more than any residential project does, because three separate parties read the drawings: the client, the landlord's consultants, and the trades who must modify live building services. Detailed documentation and clear communication — the basis of our practice — is what turns a landlord submission into an approval rather than a comment sheet. The wider method is set out on our Design & Build page, and the drawing set on our Design Project page.
About Central Plaza, Wan Chai
Central Plaza stands at 18 Harbour Road in Wan Chai, a 78-storey tower rising 374 metres above the harbourfront. It was completed in August 1992 in three phases — basement 3 to the 27th floor in October 1991, the 28th to 45th floors in February 1992, and the 46th floor to tower top in August 1992 — and it remains the third tallest building in Hong Kong, connected to Wan Chai MTR station by footbridge.
What matters to a fit-out
- Typical office floor plates of approximately 18,907 to 21,422 square feet
- Clear height of approximately 2.36 metres
- Managed Grade A tower with formal fit-out guidelines and consultant review
- Central core planning, which fixes circulation and escape routes
- Existing sprinkler, smoke detection, air conditioning and electrical provision that must be modified rather than replaced
- Loading dock and service lift access controlled by booking
- Footbridge connection, meaning heavy pedestrian traffic through common areas during business hours
Why 2.36 metres is the governing number
Clear height decides the entire ceiling strategy. Sprinkler pipework, air conditioning terminals and ductwork, lighting, and cable containment all live in the void above the finished ceiling. On a floor of this vintage the void is finite, so a designer who begins with a decorative ceiling concept and discovers the services afterwards ends up with either a dropped bulkhead in the wrong place or a services clash discovered on site. We survey the void before drawing the ceiling.
Why Office Fit-Out Is Not Residential Renovation
Someone else approves your drawings
In a home, the owner decides. In a managed tower, the landlord and its consultants review and approve layout, ceiling, sprinkler and smoke detector modification, air conditioning, electrical, floor loading and finishes before works may begin. Approval sits outside the contractor's control, which is why it is the first item on the programme rather than a formality near the end.
You are modifying live systems, not installing new ones
Sprinklers, smoke detection, air conditioning terminals and electrical distribution already serve the floor. Modifying them requires appropriately registered contractors, coordination with the base building design, and testing witnessed by the landlord's consultants. This is the part unlicensed fit-out operators get wrong, and it is the part that stops a handover.
Access is the programme
Loading dock slots, service lift bookings, hot work permits and permitted or after-hours working windows determine how much can be achieved each day. In a tower with a footbridge and heavy daytime traffic, material movement is scheduled around the building's business, not the contractor's convenience.
The end of the lease is designed at the beginning
Reinstatement obligations mean today's detail becomes tomorrow's demolition cost. Recording the base building condition, keeping as-built drawings, and preferring reversible details where they perform equally well are decisions made during design, not discovered at lease expiry.
Business continuity outranks aesthetics
A meeting room that leaks sound, a hub room that overheats, or a reception that cannot handle two visitors at once costs the client every working day. Function is specified first and finished second.
The Landlord Fit-Out Submission
Every managed tower has its own fit-out guide, but the submission package is broadly consistent. Getting it complete first time is the single biggest programme saving available.
- Layout plan with partition and door schedule, occupancy and escape route provision maintained
- Reflected ceiling plan showing ceiling type, access panels, lighting and diffuser positions
- Sprinkler and smoke detector modification drawings, prepared and executed by appropriately registered contractors
- Air conditioning modification drawings — terminal unit relocation, ductwork, condensate and controls
- Electrical single line diagram and load calculation, including any additional supply requirement
- Floor loading confirmation for heavy items such as compactus, safes, servers or a library wall
- Finishes and fire rating information for partitions, doors, glazing and floor coverings
- Contractor details with insurance, registrations and licences
- Works programme with proposed after-hours periods and access requirements
We prepare and lodge this package, then respond to consultant comments until approval is granted. Where a client engages us for design only, the same package is produced for their own contractor to submit.
Compliance Obligations in a Commercial Fit-Out
Buildings Energy Efficiency Ordinance — Form of Compliance
Where major retrofitting works are carried out on building services installations, the responsible person — which may be the owner, tenant or occupier — must obtain a Form of Compliance (Form EE4) issued by a registered energy assessor within two months after completion. The four categories of building services installation covered are air conditioning, electrical, lift and escalator, and lighting.
What counts as major retrofitting works
- Addition or replacement of a building services installation covering a works area of not less than 500 square metres in a unit or a common area, or
- Addition or replacement of a main component of a central building services installation — a complete electrical circuit rated 400A or above, a unitary air conditioner or chiller of cooling rating, or heat pump of heating rating, at or exceeding 350kW, or a lift, escalator or passenger conveyor motor drive plus mechanical drive
Installations added or replaced must comply with the latest edition of the Building Energy Code. The registered energy assessor personally inspects the installations within 30 days before declaring, then issues Form EE4 and submits copies to the Electrical and Mechanical Services Department and the property management company. The Form has no expiry date and remains valid until further major retrofitting works are carried out.
Fire service installations
Sprinkler head relocation, smoke detector repositioning and any change to fire services provision must be carried out by a fire service installation contractor registered with the Fire Services Department in the appropriate class, and tested before handover. These are never treated as ceiling trades, and no fit-out should proceed on the assumption that "the ceiling guy will move the heads".
Minor works and building alterations
Where works involve structural elements or fall within the Minor Works Control System, they must be carried out by a prescribed registered contractor; for Class II works, Form MW03 is the notice of commencement and Form MW04 the certificate of completion. D-8 Limited is a Registered Minor Works Contractor Class II — see the compliance section and our credentials.
Licensing for other commercial uses
Offices do not require a trade licence, but food and beverage, clinics, education centres and beauty or fitness premises do, and the design must support the application rather than fight it. We gather those requirements before layout work begins — the scope overview is on our home page commercial section.
Coordinating With Base Building Services
The ceiling void, first and always
Before any ceiling is drawn, the void is surveyed: sprinkler main and branch positions, air conditioning terminal units and duct runs, existing lighting and cable trays, structural downstands. With a clear height of about 2.36 metres, the achievable finished ceiling and bulkhead positions follow from that survey rather than from a mood board.
Air conditioning
Terminal unit positions must match the new partition layout, or occupants in enclosed rooms end up sharing a thermostat with the open plan. Condensate falls, control zoning and access panels for future servicing are designed in; an access panel drawn into the ceiling grid is invisible, one cut afterwards never is.
Sprinklers and smoke detection
Every new partition changes compartmentation and coverage. Head and detector positions are adjusted by a registered contractor, submitted for approval and tested — and the ceiling programme depends on those approvals rather than the reverse.
Electrical distribution and small power
Supply capacity is confirmed against the client's actual load, not assumed. Distribution board position, circuit provision for workstations, meeting room technology, pantry appliances and any hub room cooling are planned together, and cable containment coordinated with the ceiling void and any floor boxes.
Data and communications
Cabling routes, patching location, containment segregation from power, and certification of the installed links. A hub or server room needs cooling, ventilation and a heat-dissipation plan, not a cupboard.
Acoustics
Partitions taken to the slab where confidentiality is required, doors specified for acoustic performance rather than appearance, and ceiling and floor treatments considered together. A meeting room that leaks sound is the most common and most avoidable office fit-out failure.
Floor loading
Compactus units, safes, libraries and server racks concentrate load. Floor loading is confirmed with the landlord before layout is fixed, not after the shelving is ordered.
Planning the Floor Around How the Business Works
Headcount and growth
Workstation count is planned against current headcount and a realistic growth assumption, with the plate tested for both. Overplanning wastes rent; underplanning triggers a second fit-out inside the lease term.
Meeting rooms and phone rooms
Fewer, better meeting rooms plus several small phone or focus rooms usually serve a modern office better than a row of identical boxes. Sizing follows real booking patterns where the client can share them.
Reception and the first ten seconds
The reception carries the brand and handles arrivals, deliveries and waiting simultaneously. It needs a defined waiting position, concealed storage, controlled sightlines into the working floor, and lighting that flatters both people and the logo wall.
Pantry and staff areas
Plumbing and drainage locations constrain the pantry more than design preference does. Ventilation, refuse handling, appliance power and worktop area are the practical determinants, and a pantry that doubles as an informal meeting point earns its floor area twice.
Storage, hub room and print
Filing volume, stationery, marketing collateral and archive boxes all need assigned space, or they colonise meeting rooms. Print and hub positions are planned for noise and heat, not convenience.
Circulation and escape
Escape route widths and exit provision are maintained as designed — a partition that narrows a route is a rejected submission, and rightly so.
Access, After-Hours Works and Sequencing
What actually sets the dates
- Landlord approval — outside our control, therefore first in the programme
- Long lead-time items — glazed partition systems, specialist joinery, feature lighting, furniture
- Access windows — loading dock slots, service lift bookings, permitted and after-hours periods
- Testing and commissioning — sprinkler and detection testing with the landlord's consultants, air conditioning balancing, electrical testing, data certification
Working after hours
Noisy operations, hot works and anything affecting common areas generally happen outside business hours in a managed tower, under permit. That is normal and it is priced as an allowance rather than absorbed silently — a quotation with no after-hours provision for a Grade A tower is incomplete.
Phasing an occupied office
Zone by zone with sealed containment, protected routes and daily cleaning, keeping meeting rooms and the pantry functional as long as possible. It lengthens the programme and increases protection cost, so we price both phased-occupied and vacant options explicitly. The room-by-room discipline is the same one described on our occupied-premises case study.
Handover documents
As-built drawings, testing and commissioning records, warranties, operation and maintenance information, the schedule of alterations for future reinstatement, and where applicable the registered energy assessor's Form of Compliance.
Reinstatement — Designed at the Start, Paid at the End
Most Hong Kong office tenancies require the premises to be reinstated to their original condition at lease end. The cost of that obligation is largely determined during the fit-out, which makes it a design issue rather than an administrative one.
Four decisions that control the eventual bill
- Record the base condition. Photograph and document the premises as handed over, including ceiling, services positions, finishes and any existing damage, before a single partition goes up.
- Keep as-built drawings and a schedule of alterations. Reinstatement is priced from information; without it, the incoming estimate assumes the worst.
- Prefer reversible details where performance is equal. Demountable partitions, surface containment in the right places, and fixings that can be made good cost little more now and considerably less later.
- Do not alter what you do not need to alter. Every relocated sprinkler head, moved terminal unit and new ceiling opening is a line in the reinstatement scope.
What we hand over for it
A complete as-built set, the schedule of alterations against the base building condition, testing records and the finishes schedule — the same documentation discipline described on our about page. When the lease ends, that file is what keeps the reinstatement quotation honest.
What a Commercial Fit-Out Quotation Must Contain
Trade by trade with quantities, plus lines that simply do not exist in residential work. A commercial quotation without them will be revised.
- Landlord submission preparation and approval coordination
- Fire service installation modification by a registered contractor, including testing
- Air conditioning modification, controls and balancing
- Electrical distribution, small power, testing and certification
- Data cabling, containment and link certification
- Ceiling works coordinated with services, including access panels
- Partitions with stated acoustic and fire performance
- After-hours works allowance, hot work permits, loading dock and lift bookings
- Protection of lifts, lobbies and common areas, and daily clearance
- Testing, commissioning and as-built documentation
- Registered energy assessor's Form of Compliance where major retrofitting works apply
- Provisional sums for concealed conditions above the ceiling, clearly marked
Compare any quotation against our 18-point checklist and the warning signs — both apply to commercial work as much as residential.
Office Fit-Out FAQ
Send the Fit-Out Guide With the Floor Plan
In a Grade A tower, the guidelines shape the design more than the plate does. Site visit, base building review and a written itemized quotation. Call 9135 3998 or email enquiry@designd8.com.
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