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Interior Designers

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Interior design is the one service in this category with no registration anywhere in Australia. No state board grants a licence to call yourself an interior designer, no statute reserves the phrase, and no register exists for a homeowner to search. That is not a scandal — most of what an interior designer does is judgement about space, light, materials and how a household actually lives, and none of that is the sort of thing a regulator can certify. But it changes how you should choose one.

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There are still two hard boundaries, and both are worth knowing before you read a proposal. The first is linguistic: the Architects Registration Board of Victoria says the Architects Act 1991 regulates the terms architectural services, architectural design services and architectural design, so a Victorian interior designer may not describe their work using those words unless they are registered or approved by the board. The second is practical: the moment an interior scheme moves walls, changes wet areas, adds circuits or alters anything structural, it stops being decoration and becomes building work that licensed trades must carry out and, in most cases, an approval must cover.

So the useful mental model is that you are buying taste, spatial judgement and project coordination from an unregulated professional, and buying compliance from the licensed people they coordinate. A good designer is explicit about where that line sits in your project. A poor one lets you discover it when a tiler asks who is doing the waterproofing.

No register, and one set of words you still cannot use

Because there is no licence, qualifications and evidence do the work that a register does elsewhere. Look at completed projects in houses like yours rather than at styled photography, ask who took the photographs and when, and ask for a client to speak to whose job ran over time or over budget rather than the one that went perfectly. The designers worth hiring have both kinds of job and will talk about the difficult one.

The one legal line that does bind is the Victorian one. The ARBV states that the Architects Act 1991 prohibits holding out as providing architectural services, and that the regulated terms include architectural design services and architectural design. An interior designer in Victoria who offers architectural design on their website has a problem that has nothing to do with the quality of their work, and it is a reasonable signal that the practice has not read its own regulator.

Elsewhere in the country the title architect is protected too — in New South Wales by the Architects Act 2003 — so the same care applies to describing a person, even where the phrase architectural design is not itself regulated.

The parts of an interior project a designer must hand over

  • Anything electrical, including moving a socket, adding a circuit for an island bench or installing a new light point, is licensed work in every state and territory.
  • Anything plumbed, including relocating a basin, a bath waste or a gas point, is licensed work and is usually certified separately.
  • Waterproofing to a wet area is where the biggest money is lost, and before assuming your tiler may do it, ask your state's building regulator whether it is separately licensed where you live.
  • Removing or altering a wall that carries load needs an engineer's involvement and, in every state, an approval.
  • Work on a heritage-listed property or in a heritage overlay can reach inside the front door, and the approval for that sits with a state or local heritage process, not with the designer.
  • Work in an apartment almost always needs the owners corporation or body corporate to approve changes to common property, including floor coverings and anything penetrating a party wall.

The three service levels most designers actually sell

  • A consultation, typically a few hours on site producing direction rather than documentation, which suits a household that will execute the work itself.
  • A design and specification package: layouts, finishes, joinery drawings, lighting and a schedule you can hand to trades, with the designer stepping back at that point.
  • A full service including procurement and site coordination, where the designer orders, tracks and installs, and is the person the trades ring.
  • A staged version of the full service, where the designer coordinates the fit-out but the builder retains responsibility for the construction contract.
  • Joinery-only engagements, which are common and useful, and are really a specification exercise dressed as design.

How an interior project is staged so the trades are not waiting

  • A brief, ideally written, that records how the household actually uses the rooms rather than how the plan suggests it should.
  • A measured survey, because the drawing you were given when you bought the house is not a measurement.
  • Concept and spatial planning, where walls, openings and circulation are settled before any finish is chosen.
  • Services coordination, so that the electrician and plumber are given positions before linings close up and not after.
  • Documentation and schedules, including joinery drawings that a cabinetmaker can build from without ringing you.
  • Procurement with realistic lead times, which for imported tapware, tiles and appliances is the single most common cause of a stalled site.
  • Installation and styling, then a defects walk-through while the trades are still available.

The contract is a list of deliverables, not a mood

Because nobody is registered, the written agreement is your main protection, and the useful ones are specific. They name the rooms in scope, the number of concept options, how many revisions are included, who places orders and in whose name, who holds the money for goods, and what happens if an item is discontinued between specification and order.

Ownership of the drawings is worth settling at the start, especially for joinery documentation you may want to re-tender. So is the question of trade discounts: whether the designer's buying rate is passed on, retained, or used to fund their fee is a legitimate commercial arrangement, but it should be visible rather than discovered.

Ask about professional indemnity insurance even though no state requires it here. Not every interior designer carries it; knowing which one you have engaged tells you how much of the risk is yours.

How interior schemes unravel

  • Finishes selected before the layout is settled, so the tile setout fights a door that moved.
  • Lighting designed as a ceiling pattern rather than around tasks, which is the flaw people notice for years.
  • An appliance chosen late that does not fit the joinery already ordered, or needs a gas or power supply nobody allowed for.
  • Lead times discovered after demolition, leaving a household living around a site for months.
  • Apartment work started before the owners corporation approved it, which can stop a job on day one.
  • No written revision limit, so the design process runs long and the relationship sours over fees rather than design.

Interior Designers: frequently asked questions

Do interior designers need a licence in Australia?

There is no registration or licence for interior design in any Australian state or territory, so anybody may use the description. What is regulated is adjacent: in Victoria the Architects Registration Board says the Architects Act 1991 regulates the terms architectural services, architectural design services and architectural design, and in New South Wales the title architect is protected by the Architects Act 2003. An interior designer may design, but the electrical, plumbing and structural parts of the job must go to licensed trades regardless.

What is the difference between an interior designer and an interior decorator?

Neither term is protected, so in practice the difference is what the person actually does. Decoration works with the rooms as they are: colour, soft furnishings, furniture, styling. Design is prepared to change the rooms: move a wall, relocate a doorway, redesign a wet area, redraw the lighting. Because the words carry no legal meaning, the way to tell which you are buying is to ask for a recent job where walls or services moved, and look at whether the practice produced drawings a trade could build from.

Can an interior designer get my approvals?

They can coordinate the process, but approvals are issued to the owner and assessed by a council or a certifier, and the drawings behind them usually have to come from someone whose scope covers building work. If your project stays inside the existing walls and changes no services, you may need no building approval at all. Once it touches structure, wet areas or the building envelope, ask early who is preparing the approval drawings and who is lodging them, because that is the gap most often left open.

How do I check an interior designer when there is no register?

Substitute evidence for registration. Ask for three completed projects of similar scope and speak to those owners about timelines and money, not about looks. Ask for a full documentation set from a past job, including joinery drawings and a finishes schedule, because that shows whether trades can actually build from their work. Ask whether they carry professional indemnity insurance. And read the agreement for revision limits, procurement arrangements and who holds deposits for goods.

Do I need approval to change an apartment interior?

Almost always you need the owners corporation or body corporate to agree, separately from any council or certifier approval. Anything that touches common property is the usual trigger, and that includes more than people expect: floor coverings and acoustic underlay, penetrations through party walls or slabs, changes to windows and balustrades, and relocation of services that run through common areas. Get that consent in writing before ordering anything, because a scheme stopped at day one is far more expensive than one delayed at design stage.

Sources

  1. Architects Registration Board of Victoria: Prohibited conduct in the architectural industry
  2. NSW Architects Registration Board: Protection of the architect title
  3. Architects Registration Board of Victoria: Legislative framework

Written by the LokalMatch editorial team. Last reviewed 22 September 2026. How we write and check our guides

What interior designers can help with

Common jobs homeowners hire interior designers for:

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What affects the cost of interior design

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of professional and service needed
  • Size and complexity of the project
  • Level of detail in drawings or reports
  • Number of site visits and meetings
  • Number of design revisions
  • Help with permits or contractor selection

How to compare interior designers before you hire

  • Match the professional to the job: an architect or engineer where the work requires one, a designer for layout and finishes, or an inspector for a condition report.
  • Ask whether they are licensed or certified for this type of work in your area, where that applies.
  • Review a portfolio or sample report that's similar to your project.
  • Get a written agreement that spells out the services, deliverables, number of revisions and how fees are charged.
  • Ask whether their drawings will be suitable for a permit application, and whether they'll help with it.

Questions to ask interior designers before you hire

  • Are you licensed or certified for this type of work in my area?
  • What exactly will you deliver: drawings, specifications, a report or site visits?
  • How are your fees charged: a fixed fee, hourly or based on the project cost?
  • How many rounds of revisions are included?
  • Will your drawings be ready for a permit application, and will you submit it?
  • Can I see a sample of a similar project or report?
  • Do you carry professional liability insurance?

When to call a pro for interior design

  • Before removing or moving a wall that may be load-bearing
  • Before buying a home, to understand its condition
  • When a permit application needs drawings

Interior design permits and local rules

Some interior design work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

Guides about interior design

Services related to interior design

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