Floor Plan Costs in Australia: $600–$15,000 vs. 18–48 Hour Agent Plans
Floor plan costs in Australia typically fall between $600 and $2,000 for a simple deck or carport plan, $3,000 to $9,000 for an extension, and $5,000 to $15,000 for a new house, according to Yakka Labour’s 2026 drafting cost data. Architect fees often run as a percentage of construction cost rather than a flat rate, and council, engineering, and survey fees are usually billed separately. For agents who need marketing-ready plans rather than construction documentation, we deliver standards-compliant 2D and 3D floor plans in 18 to 48 hours.
TL;DR:
For new homes, drafters often estimate $20 to $50 per square meter; a 250 square meter build at $35 totals about $8,750 before consultants.
On a $600,000 build, a plans only architect service at 6% costs about $36,000, while full service at 11.5% exceeds $69,000.
Architects should sign a client agreement before paying fees, with variation charges, disbursements, timelines, and consultant responsibilities stated; tie payment milestones to deliverables.
Agents can use marketing plans for portals, not council submissions or construction contracts; Blistr’s rental and sales packages cost $249 and $699, respectively.
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What floor plans cost by project type in Australia
Price depends heavily on what you’re building and who draws it. A simple structure with no structural complexity costs a fraction of what a custom two-storey home requires, and the gap widens once council approval enters the picture.
Based on current drafting cost data, here’s what Australian property owners and agents typically pay:
Project type | Typical cost range |
Deck, pergola, or carport | $600 to $2,000 |
Garage or shed | $600 to $2,000 |
Measure-up of existing drawings | $600 to $2,000 |
Internal alterations | $3,000 to $9,000 |
Single-storey extension | $3,000 to $9,000 |
Second-storey addition | $5,000 to $15,000 |
Granny flat | $3,000 to $9,000 |
New single-storey house | $5,000 to $15,000 |
New double-storey or custom house | $5,000 to $15,000 |
Duplex or dual occupancy | $5,000 to $15,000 |
These figures come from Yakka Labour’s 2026 drafting cost guide, which also notes that drafters frequently price new homes using a per square meter rule of thumb, generally $20 to $50 per square meter. A 250 square meter house priced at $35 per square meter would land around $8,750 for the drafting component alone, before engineering, survey, or council costs are added.
A few patterns are worth keeping in mind when you compare quotes:
Simple, non-structural jobs (decks, sheds, measure-ups) sit at the bottom of the range because they require minimal documentation.
Anything involving a second storey or structural change jumps in cost due to the engineering coordination involved.
New house plans cost more than extensions of similar floor area because they require a full set of working drawings rather than modifications to existing documentation.
Regional variation matters too. Drafting rates in Sydney commonly run higher than Melbourne, reflecting both labor costs and the density of compliance requirements across different council areas, according to Yakka Labour’s city-by-city breakdown. Canberra projects often sit closer to Melbourne pricing, though individual quotes still depend on the complexity of the site and the number of revisions built into the fee. None of these ranges include the separate costs of site surveys, BASIX assessments, or development application fees, which we cover in the next section.
How drafters, building designers, and architects charge differently
The person you hire changes both the price and what you get for it. Drafters and building designers typically handle straightforward residential work, while architects take on projects where design complexity, heritage constraints, or bespoke outcomes justify a higher fee structure.
Drafters and building designers generally charge $80 to $160 per hour, or a fixed fee for simple jobs like decks, carports, and single-storey extensions, according to Yakka Labour’s drafting cost data. Architects, by contrast, usually price their services as a percentage of total construction cost rather than an hourly rate.
Architect fees in Australia often run as a percentage of construction cost, with full service generally costing a higher percentage than plans-only packages, according to Bark Australia’s architect cost analysis. On a $600,000 build, a plans-only engagement at 6% would cost approximately $36,000, while full service at 11.5% would push past $69,000. The gap reflects the amount of coordination involved: full service includes consultant management, construction oversight, and ongoing site involvement, not just the drawings.
A plans-only package commonly excludes:
Structural and civil engineering calculations
BASIX energy efficiency assessments
Site surveys and contour plans
Council lodgement and liaison during the development application process
Guidance from Port Phillip Council notes that architect fees reflect coordination and planning expertise, not just the cost of producing drawings, which explains why complex projects attract higher percentage rates than simple ones. If your project involves a sloping site, structural alterations, or a development application, a drafter’s scope of service may not cover what’s required, and an architect or structural engineer becomes necessary. For a straightforward renovation or a single-storey addition with no major structural change, a building designer or drafter is usually sufficient and considerably cheaper.
What drives floor plan costs up or down
Several factors push a quote above the baseline ranges, and most of them show up early if you know what to ask about before signing an agreement.
Site conditions. A sloping block, poor soil, or restricted access adds engineering and survey costs that a flat, easy-access site avoids entirely.
Project complexity. Double-storey additions, structural alterations, and wet area reconfigurations (bathrooms, kitchens) require more detailed documentation than a simple floor plan.
Approval pathway. A development application generally costs more in time and consultant fees than a complying development certificate, since DA soften require additional reports and council assessment.
Revisions and variations. Most fee proposals include a set number of revisions; additional rounds beyond that are typically billed separately.
Turnaround requirements. A rushed timeline can attract a premium, particularly when a drafter has to reprioritize other client work to meet it.
Location. Rates vary by city and even by council area, since local compliance requirements and labor costs differ.
Preliminary and approval costs, including site surveys, BASIX assessments, and council development application fees, are commonly charged separately from the design fee itself, according to the NSW Planning Portal’s guidance on approval phases. Leaving these out of an initial budget is one of the most common reasons renovation costs come in over estimate.
Pro Tip: Ask every drafter or architect to itemize engineering, survey, and council fees separately from the design fee so you can see the full project cost before committing.
How to get an accurate, comparable quote
The biggest budgeting risk isn’t the headline price, it’s a quote that leaves out what happens after the first draft. A clear agreement upfront prevents most of the disputes that drive costs higher than expected.
Before accepting any quote, confirm these items in writing:
What’s included: number of plan revisions, consultant coordination, and council lodgement support.
Who arranges and pays for additional consultants (structural engineer, surveyor, BASIX assessor).
Whether GST is included in the quoted figure.
Disbursements such as printing, travel, or council fees, and how they’re billed.
The expected timeline from brief to final plan delivery.
For architects specifically, a fee proposal is not the same as a compliant client agreement. Guidance from the Architects Registration Board of Victoria states that a proper client agreement must clearly explain fees, how variations affect those fees, disbursements, and timeframes, and this agreement must be signed before fees are collected. Insist on this document rather than accepting an informal quote as the final word on cost.
A practical sequence for most projects:
Request itemized quotes from at least two or three providers.
Confirm the client agreement covers fee variation triggers, not just the base price.
Agree on payment milestones tied to deliverables (concept design, development application lodgement, final plans).
Build in a contingency for consultant and approval costs that commonly sit outside the headline design fee.
You can paste this into an enquiry email: “Please confirm your fixed fee or hourly rate, the number of included revisions, whether GST and disbursements are included, who coordinates consultants, and your expected turnaround time.”
When Blistr fits the floor plan need for agents
Everything above applies to construction-stage design, where approvals, engineering, and compliance documentation drive both the cost and the timeline. Real estate agents preparing a listing have a different problem: they need an accurate, professional floor plan fast, without the overhead of a full design engagement.
We produce AI-generated 2D and 3D floor plans as part of a broader marketing collateral package, built for agents who need gallery-ready assets rather than construction drawings. Delivery runs 18 to 48 hours from a single property capture, and our formats are built to match what Australian listing portals expect, a detail we cover in our guide to realestate.com.au floor plan requirements.
Here’s where this fits into the picture:
Marketing-grade floor plans work for listing campaigns, auction brochures, and online portals where speed and visual presentation matter most.
They are not a substitute for the measured, engineering-grade documentation required for a development application or construction contract.
Our plans follow the measurement standards Australian agents need for portal compliance, which matters when a listing gets scrutinized by buyers comparing square meter figures.
Pro Tip: If you’re listing a property and need floor plans within days rather than weeks, review our Sales Package before committing to a traditional drafting timeline.
For agents juggling multiple listings each month, the difference between a multi-week drafting turnaround and a 48-hour delivery window often determines whether a campaign launches on schedule.
Getting the budget right without overpaying
The single biggest mistake we see in floor plan budgeting is treating the design fee as the whole number. Council fees, engineering, and survey costs sit outside most quotes, and a quote that doesn’t separate these out is usually hiding the real total rather than simplifying it.
Match the service to the job. A deck or simple renovation rarely justifies an architect’s percentage-based fee structure, while a complex double-storey build with structural changes genuinely benefits from full-service coordination despite the higher cost. For agents, the calculation is different again: a marketing-ready plan and a construction-ready plan solve two separate problems, and conflating them leads to either overpaying for a listing asset or underpreparing for a council submission.
Read every client agreement for how variations are priced before you sign, not after the first change request arrives.
— Pierce
Get marketing-ready floor plans without the drafting wait
Agents preparing a listing don’t need a six-week drafting queue, they need accurate, portal-ready floor plans alongside the rest of their marketing collateral. Our Sales Package at $699 one-off and Rentals Package at $249 one-off both include floor plans as part of a complete listing asset bundle, and our Blistr Collateral Package extends that further for agents who need the full suite of images, video, and plans from a single property capture.
Book a capture through Blistr Booking at $750 one-off and have your floor plans and marketing assets ready within 18 to 48 hours.
FAQ
What is the average cost of a house extension in Australia?
A single-storey extension typically costs $3,000 to $9,000 for the design and drafting component alone, according to Yakka Labour’s 2026 cost data. Construction costs sit separately from this figure, and engineering, survey, and council fees are commonly billed on top, so a full project budget needs to account for all three categories rather than the design fee in isolation.
Can I make my own floor plans?
You can sketch a basic concept plan yourself for personal reference, but any plan submitted for council approval or used in a construction contract needs to meet formal drafting and documentation standards. For marketing purposes, such as a real estate listing, a professionally produced plan is generally expected by buyers and listing portals, and services like ours can produce one quickly without a full drafting engagement.
How much should I pay an architect to design a house?
Architect fees in Australia average around 6% of construction cost for a plans-only service and approximately 11.5% for full service, according to Bark Australia’s architect fee analysis. On a $600,000 build, that works out to roughly $36,000 for plans-only or more than $69,000 for full service, with the exact figure depending on project complexity and the scope defined in your client agreement.
How much does it cost to do a house plan?
A new house plan typically costs $5,000 to $15,000 through a drafter or building designer, according to Yakka Labour’s drafting cost guide. Costs rise toward the top of that range for double-storey or custom designs, and this figure covers design and documentation only, not engineering, survey, or council approval fees.
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