Architect Fees in Sydney: Fixed Fee vs Percentage and What You Are Paying For

Architect fees in Sydney are charged in one of three ways: a percentage of the construction cost, a fixed fee for a defined scope, or an hourly rate. None is cheaper by default. What matters is what the fee covers, what it leaves out, and whether it can change. This guide explains each structure, the stages you are paying for, and how to compare two proposals properly.

The three ways architects charge

Percentage of construction cost. The fee is an agreed percentage of what the building costs. It scales with the project. It also moves: if the build cost rises, so does the fee.

Fixed fee, or lump sum. A set amount for a set scope, usually broken into stages. You know the cost before you start. It holds only while the scope holds.

Hourly rate. Charged for time spent. Suits small or open-ended tasks such as early advice, feasibility or minor changes. Hard to budget for a whole project unless capped.

Many practices mix them, for example a fixed fee for design and documentation with hourly rates for anything outside the brief.

Fixed fee vs percentage at a glance

A percentage fee is sometimes criticised for rewarding a more expensive building. A fixed fee is sometimes criticised for encouraging the minimum. Both criticisms miss the point that a clear written scope protects you under either model.

What the fee is buying: the stages

Residential work is usually broken into stages, and you can often engage for some and not others:

1. Feasibility and brief. Checking planning controls and what the site allows.
2. Concept design. Layout options and the overall form.
3. Design development. Refining the chosen option, materials, coordination with the engineer.
4. Approval documentation. Drawings and statements for a DA or CDC.
5. Construction documentation. Detailed drawings and schedules for pricing and building.
6. Tender. Helping you obtain and compare builders' prices.
7. Contract administration. Site visits, answering builder queries, assessing claims and variations.

Not every project needs all seven. Partial services are common, particularly stopping after approval or after construction drawings.

What is usually not included

This is where proposals differ most, and where surprises come from. An architect's fee normally excludes:

• the land survey
• structural and civil engineering
• BASIX and energy assessments
• bushfire, heritage, arborist, geotechnical and acoustic reports
• the certifier's fees
• council application fees and development contributions
• a quantity surveyor's cost estimate
• changes requested after a stage has been signed off

Some architects arrange and coordinate these consultants for you, and some leave it to you. Ask which. Coordination has value even when the consultants bill separately, and our consultant coordination page explains how we handle it.

Why two fee proposals can look so different

When one proposal is half the price of another, they are rarely for the same work. Check:

• how many stages each covers
• whether construction drawings are included or only approval drawings
• how many design options and revisions are allowed
• whether site visits during construction are included
• who coordinates consultants
• what triggers an additional fee

The cheapest proposal often stops at approval. That can be exactly what you need. It can also leave you holding DA drawings that no builder can price accurately, which we explain on our construction drawings page.

How LCG Architects charges

We work on fixed-fee proposals. After reviewing the site and the brief, we set out each stage, what is delivered in it, and its fee. You can see the total before committing and can stop at the end of any stage.

The honest caveat is that a fixed fee is only fixed for the scope it describes. If the brief changes substantially after a stage is approved, such as adding a level or changing the approval pathway, that is a variation and we price it before doing the work. A proposal that promises no variations under any circumstances is either padded or will be argued about later.

We do not publish a price list, because the same granny flat on a flat lot and on a steep bushfire-affected one are different amounts of work. We also do not quote build costs. Those come from builders pricing the finished drawings.

Design fees and the total budget

Fees are a small part of what a project costs, and they control the larger part. Decisions made in design fix most of the construction cost: the size, the structure, the number of wet areas, the complexity of the roof.

Spending less on documentation tends to move cost into the build, where it appears as allowances and variations. Spending more on design than a simple project needs is also a waste. The aim is a scope that fits the job, whether that is full service or straightforward building design and drafting.

Questions to ask about any fee proposal

1. Which stages are included, and what do I receive at the end of each?
2. Is the fee fixed, and what would change it?
3. Which consultants do I need, and who engages them?
4. How many rounds of changes are included per stage?
5. Are site visits during construction included?
6. What are the payment milestones?
7. Do I own the right to use the drawings if we part ways?

Get the answers in a written agreement. The NSW Architects Registration Board publishes guidance for consumers on engaging an architect, including the code of conduct that requires a written agreement, and the Australian Institute of Architects offers standard client and architect agreements.

Next step

Send us the address and a paragraph on what you want to achieve. We will return a staged, fixed-fee proposal showing what each stage delivers and what sits outside it.