Insights

Commercial Kitchen Design in Perth: How to Get It Right the First Time

Getting commercial kitchen design right the first time in Perth means involving a partner who can foresee how services, compliance and logistics will actually come together on site before a single drawing is locked. Zera operates as that delivery-aware design partner, keenly threading buildability and Lazco’s in-house design, engineering, and fabrication capabilities into the earliest stages so that conflicts never become costly variations. When commercial kitchen design is led by early contractor involvement, the result is a coordinated, compliant space that opens on time and performs from day one.

How is commercial kitchen design different from standard construction?

A commercial kitchen is one of the most services-dense, compliance-heavy spaces in any commercial building. The differences from standard commercial fit-out:

  • It’s governed by food-safety law, not just the building code. A commercial kitchen must satisfy the Food Act 2008 (WA) and Food Regulations 2009 (WA), the national Food Safety Standard 3.2.3 (Food Premises and Equipment), and the deemed-to-satisfy design standard AS 4674 – Design, construction and fit-out of food premises – on top of the National Construction Code (NCC). Standard office or retail fit-out has no equivalent layer.
  • Local-government approval is a gate, not a formality. Plans must be assessed and approved by the relevant local council’s Environmental Health Officer (EHO) before fit-out, and the premises are inspected before it can be registered to trade. Designing without early EHO engagement is a common cause of redesign.
  • Services density is extreme. A kitchen concentrates mechanical exhaust and make-up air, gas, high-load electrical, hot and cold water, drainage with grease separation, and refrigeration into a small footprint. In standard construction these services are spread across a floorplate; in a kitchen they all converge over the cooking line.
  • Surfaces and hygiene are engineered, not finished. Walls, floors, ceilings and joinery must be impervious, non-toxic, cleanable and (for floors) graded to waste – not chosen for appearance. Coving at floor/wall junctions, sealed penetrations, and washable surfaces are compliance requirements, not design preferences.
  • The equipment drives the building, not the reverse. Final equipment selection dictates exhaust hood size and capture velocity, gas and electrical loads, water and waste points, and clearances. If the building is designed before equipment is confirmed, services almost always have to move.

Key principles of commercial kitchen design:

Effective commercial kitchen design balances workflow, compliance and equipment integration as one connected system rather than treating them as separate steps. So, when a delivery-aware partner like Zera brings Lazco’s in-house engineering and fabrication knowledge into the earliest design phase, these principles are applied with full buildability and services coordination in mind. Getting commercial kitchen design right the first time means every principle (from food-safety zoning to exhaust and drainage) is resolved on paper long before it becomes an on-site conflict.

Workflow efficiency

The kitchen layout should follow the flow of food and labour, designed to prevent backtracking and cross-contamination:

  • Linear process flow: delivery → dry/cold/frozen storage → preparation → cooking → plating/pass → service, with the dishwash/return path kept separate from the clean/outgoing path.
  • Zoning to prevent cross-contamination: raw and ready-to-eat preparation are physically or procedurally separated; the wash-up zone is isolated from food prep. This is both a workflow and a food-safety requirement.
  • The work triangle / station ergonomics: stations sized so staff can work without collision at peak service; adequate clear circulation (typically ~1,000–1,200mm minimum aisle, wider where two-sided working or trolley movement occurs).
  • Throughput-led sizing: the kitchen is sized to covers-per-service and menu type, not just floor area. An under-sized prep or wash zone bottlenecks the whole operation regardless of how good the cooking line is.
  • Storage proximity: cold, frozen and dry storage located to minimise travel from delivery and to the prep line.

Compliance (health, safety, ventilation)

This is where most cost and program risk sits. Key requirements are:

  • Mechanical exhaust and make-up air – commercial cooking equipment requires a kitchen exhaust hood system designed to AS 1668.2 (ventilation/contaminant capture) and AS 1668.1 (fire safety of the system). The hood must achieve the required capture-and-containment velocity over the appliance line, and the building must supply tempered make-up (replacement) air to balance what’s extracted – under-supplying make-up air is a very common design fault that causes negative pressure, doors that won’t close, and poor extraction.
  • Fire safety of the exhaust – grease-laden vapour ducting, fire-rated duct construction/clearances, hood fire suppression where required, and access for cleaning the duct run.
  • Food-premises construction – surfaces impervious and cleanable; coved floor/wall junctions; floors slip-resistant (AS 4586) and graded to floor wastes; adequate hand-wash basins separate from food-prep and pot-wash sinks; vermin-proofing. Per AS 4674 / Standard 3.2.3.
  • Plumbing, drainage and trade waste – drainage to AS/NZS 3500; a grease arrestor (grease trap) is required, sized to the kitchen’s load, with a Water Corporation trade-waste permit for discharge to sewer in the Perth metro area. Grease arrestor location and size must be designed early – retrofitting one is expensive and disruptive.
  • Gas – gas appliance installation to AS 5601, with ventilation, isolation and clearances coordinated against the exhaust design.
  • Electrical – kitchen equipment loads (often three-phase) sized into the building’s distribution; this frequently drives a switchboard or supply upgrade that must be identified at design stage.
  • Building code – the space typically sits within an NCC Class 6 building classification, with the associated egress, fire and accessibility provisions.

Equipment integration

The equipment schedule is the single most important coordination document in a kitchen project:

  • Confirm equipment before locking services. Each item carries a service requirement – gas rate, electrical load and phase, water (cold/hot/filtered) supply, drainage point, and exhaust demand. Services must be set out to the final equipment, not generic allowances.
  • Clearances and combustible separation – manufacturer clearances to combustibles and for service access must be honoured; this affects layout and wall construction.
  • Refrigeration – coolrooms, freezers and refrigerated displays need to be coordinated for structural support, condensate drainage, electrical supply, and (for remote systems) condenser location and pipe runs. (Zera/group note flagged below.)
  • Stainless steel fabrication – benches, shelving, exhaust canopies and splashbacks are custom-fabricated to the layout; lead times and on-site joins for oversized items need to be programmed in.
  • Future load allowance – leaving spare capacity in exhaust, electrical and services for likely future equipment is far cheaper than retrofitting it.

Collaboration between designer, consultant, and builder

Kitchen projects fail at the interfaces between disciplines. A typical commercial kitchen project involves:

  • The kitchen / hospitality designer – layout, workflow, equipment schedule, aesthetic.
  • A food-service / kitchen consultant – equipment specification and workflow validation. Choosing Zera means the kitchen design is coordinated from the start because Lazco brings this equipment specification and workflow validation together with in-house design, engineering and fabrication.
  • Building services consultants – mechanical (exhaust/ventilation), hydraulic (water/waste/grease/trade waste), electrical, fire, and (where relevant) structural engineers.
  • The Environmental Health Officer – the council approval authority.
  • The builder – buildability, sequencing, coordination, and delivery.

The delivery-aware point: these parties often work in sequence, with each handing over a “finished” design that the next has to unpick. Bringing the builder in early (ECI) turns it into a coordinated process – the builder runs a buildability and services-coordination review while the design is still flexible, so clashes (a duct that won’t fit the ceiling void, a grease arrestor with nowhere to go, a switchboard that needs upgrading, an exhaust hood that won’t physically install) are resolved on paper, not on site. That is the difference between an expertly coordinated kitchen and a kitchen full of variations.

Nine commercial kitchen design mistakes that cause costly rework

The recurring, expensive ones – all preventable at design stage:

  1. Designing the space before equipment is confirmed – every service then sits in the wrong place. The single most common and most expensive error.
  2. Insufficient make-up air – exhaust designed without balanced replacement air; result is poor extraction, negative pressure, comfort and door problems, and sometimes a failed commissioning.
  3. Grease arrestor / trade waste left to last – discovering late that an arrestor must be fitted, sized and permitted, with no space allowed for it.
  4. Inadequate electrical or gas capacity – equipment loads exceed the available supply; switchboard or gas upgrade discovered mid-fit-out.
  5. No early EHO engagement – design completed, then forced into redesign to satisfy the health assessment (surfaces, hand basins, separation, finishes).
  6. Ceiling void and services clashes – exhaust ducting, hydraulics and electrical competing for the same space above the cooking line.
  7. Under-sized prep, storage or wash zones – the cooking line looks impressive but the kitchen bottlenecks because support zones were squeezed.
  8. Ignoring access for install and maintenance – equipment that can’t be brought in through the building, or duct/equipment that can’t be cleaned or serviced once installed.
  9. Non-compliant surfaces and detailing – un-coved junctions, non-slip-rated or non-graded floors, unsealed penetrations – caught at inspection and reworked.

Each of these costly mistakes is the result of a commercial kitchen design developed in isolation from the people who will actually coordinate services and install the kitchen on site. That’s why Zera brings Lazco’s delivery-aware engineering, fabrication and buildability knowledge into the design phase so these conflicts are resolved on paper, not discovered as variations and rework mid-construction. 

Designing your kitchen for long-term scalability

A kitchen should be designed for where the operation is going, not only where it is on day one:

  • Spare services capacity – leave headroom in exhaust extraction, electrical distribution and gas so future equipment can be added without re-engineering the core services.
  • Storage and refrigeration headroom – cold and dry storage sized with growth in mind; running out of storage is a common early constraint.
  • Infrastructure provisions – capped-off services or pre-run provisions for likely future stations are cheap to install during fit-out and expensive to retrofit into a live kitchen.
  • Durable, serviceable specification – commercial-grade surfaces, equipment and finishes selected for a long service life and easy maintenance, so the kitchen doesn’t need a premature refit.
  • Minimised future downtime – designing so that later upgrades can happen without shutting the whole kitchen down protects the operator’s revenue.
  • Use Equipment and Service partners based in WA with local/available teams and spare parts. Specifying equipment through Lazco means you’re backed by a local WA team with ready access to spare parts and ongoing servicing, so future maintenance never becomes a logistical headache that forces extended kitchen downtime.

Case Study

At 74 Frobisher Street, Golden Bakery needed to keep their business running while transforming a dilapidated adjoining building into a new head office and production facility. Zera’s approach to commercial kitchen design made early operation possible: by bringing Lazco’s in-house engineering, fabrication and buildability knowledge into the design phase, we sequenced the project so the production kitchen could go live approximately six months ahead of the broader refurbishment. This phased delivery relied on early contractor involvement to resolve services routing, equipment placement, and compliance pathways before construction began, eliminating the clashes and rework that typically delay a kitchen of this scale.

The result was a fully coordinated production kitchen integrated into a facility that expanded operational floor space to roughly four times its original size, consolidating production and office functions under one roof with a significantly improved street presence. That outcome was only achievable because the commercial kitchen design was treated as a delivery-led process from day one. Equipment was confirmed against local authority and food-safety requirements, trade-waste and exhaust were sized for future growth, and Lazco’s local WA team ensured that every fabricated element fitted without on-site modification. The kitchen reached operation earlier, the client maintained continuity, and the facility was built ready for long-term scalability and serviceability.