Interior Design Fees in Melbourne: What Should You Actually Expect to Pay?
If you're planning a renovation in Melbourne, interior design fees typically range from a few thousand dollars for smaller projects like bathrooms to $80,000+ for full-home renovations, shaped by project scope, complexity, and the level of professional support required.
Interior design fees often feel vague and mysterious, like classified information whispered behind closed doors. You deserve real clarity, not fluff or vague "it depends" answers, so here's a grounded guide to Melbourne costs
and exactly what you're paying for.
Our beautiful Myrtle House project benefitted from a strong core team of interior designer, builder and cabinet maker - all committed to a successful project.
How Interior Designers Structure Their Fees:
In Melbourne, most designers use one (or a combination) of the following:
Hourly rate - generally $120–$250+ per hour
Fixed design fee - tailored to scope and size
Percentage of project cost - typically 8 to 15%
Procurement margin - applied to furniture, fixtures and finishes
The right structure depends on the project type and how involved the designer is from start to finish.
What Do Interior Design Fees Look Like in Real Terms?
Here are realistic ballparks for Melbourne-based residential projects.
1. Bathroom Renovation
Build cost: $30,000–$60,000+
Design fees: $4,000–$8,000
This usually covers:
Concept design, spatial planning, 3D renders
Tile, stone and fixture selections
Joinery design
Design documentation for trades
Site visits during construction
Bathrooms are small but complex. Waterproofing, levels, lighting, storage - everything matters. Good design here prevents very expensive mistakes.
2. Kitchen Renovation
Build cost: $50,000–$120,000+
Design fees: $7,000–$20,000+
Kitchens require serious planning:
Layout optimisation
Custom cabinetry design
Appliance integration
Lighting and electrical planning
Concept direction and 3D renders
Detailed joinery documentation
This is where thoughtful design really pays off. Cabinetry errors alone can cost more than the design fee to fix.
3. Whole-Home Renovation or Extension
Build cost: $300,000–$1M+
Design fees: $25,000–$80,000+
This often includes:
Full concept development
Space planning
Interior and exterior finishes
Joinery design throughout
Lighting plans
Documentation packages
Builder liaison
Site visits during construction
For larger projects, fees may sit around 10–15% of the build cost, depending on involvement and level of service the client requires.
Why Interior Design Fees in Melbourne Vary So Much
Interior design involves far more than just picking tiles—it's a comprehensive process that coordinates every detail for a seamless, high-value outcome.
Expanded Factors Influencing Fees
Fees reflect the true scope and expertise required. Here's each key factor fleshed out:
Level of documentation required
This covers detailed technical drawings, specifications, and schedules that tradespeople rely on. Basic concepts might need sketches only, while full projects include precise joinery plans, lighting layouts, and material schedules—adding 20-50 hours of work.
Complexity of the build
Simple cosmetic updates are straightforward, but projects with heritage constraints, unusual layouts, or integration with structural engineering demand more problem-solving. A steep block site or multi-level extension multiplies time spent on feasibility and coordination.
Number of rooms
Each additional space scales effort exponentially. One bathroom might take 30-40 hours; a 5-room home requires space planning across circulation, sightlines, and lifestyle flow, easily doubling or tripling the input.
Structural coordination
Designers often liaise with architects, engineers, and builders to align interiors with load-bearing walls, floor levels, and services. Missteps here lead to costly changes, so fees account for meetings, RFIs, and revisions to ensure everything fits.
Joinery detail
Custom cabinetry, built-in storage, or feature walls need precise 3D models, elevations, and cut lists. Off-the-shelf furniture is quick; bespoke pieces with soft-close mechanisms or integrated appliances can add 10-20 hours per room.
Construction support
Site visits, progress checks, and trade clarifications prevent errors. Basic design might end at handover; full-service includes 5-15 visits, photo reports, and punch lists to deliver the vision without budget blowouts.
Whether furniture and styling are included
Sourcing, procuring, and styling FF&E (furniture, fixtures, and equipment) involves vendor negotiations, lead times, and delivery oversight. This can add 15-30% to fees via hourly work or margins, especially for curated, sustainable pieces.
A small cosmetic refresh—think paint and new hardware—might cost $2K-$4K in design time. Designing bespoke cabinetry across an entire home demands holistic vision, technical precision, and oversight, justifying $25K+ fees that protect your larger investment.
What You’re Really Paying For
A good interior designer will:
Protect your budget
Refine your ideas into something cohesive and long lasting
Prevent costly on-site decisions
Reduce stress
Elevate the overall result providing you with a home that elevates how you live
If you’re time-poor and juggling work, family and everything in between, having someone take control of the process is often the biggest value of all.
A Final Word on “Is It Worth It?”
Design fees are typically a small percentage of the overall project cost, but they influence 100% of the outcome.
The right design decisions increase functionality, improve resale value, and make your home genuinely enjoyable to live in.
And that’s not a line item you can measure purely in dollars.
If you're planning a renovation in Melbourne and want clarity on what your specific project might involve, a tailored scope conversation is always the best first step. Every home is different and at Assembly Interiors, we feel strongly that the right design support should feel considered, not cookie-cutter.
Interior design planning creates a seamless experience onsite in these critical rooms.
If you’re ready for someone to take control of the process and guide you through it properly — you know where to find me.