Building a Custom Home in Brisbane: What It Costs, How Long It Takes, and How to Avoid the Seven Mistakes That Cost People Most
Most people building a custom home in Brisbane have the same three questions and struggle to get a straight answer to any of them. What will it actually cost. How long will it actually take. And how do I know this builder will not let me down.
This guide answers all three, and it goes through the seven mistakes that cost homeowners the most money. Some of them happen before a single line is drawn. We build across North Lakes, Narangba, Newport, Samford Valley and Banksia Beach, so everything here comes from work we have done in this region rather than general advice.
What is a custom home, and how is it different from a project home?
A project home is a design that already exists. The builder has drawn it, priced it and built it many times, and you choose from a set list of facades, colours and upgrades. That repetition is where the saving comes from, and it is a real saving.
A custom home starts from your block and your brief, and the house is drawn around both. Nothing is adapted, because nothing was pre drawn.
Think of it as a suit off the rack against one made to measure. Off the rack is well made and cheaper and it fits most people acceptably. Made to measure starts with your shape. Blocks work the same way. On a flat, regular, serviced lot a project design sits happily. On a block that slopes, is acreage, is coastal or carries an overlay, a standard plan gets modified until the saving has gone, and every modification is priced after you have already signed.
Mistake One: Negotiating on Price Too Early
Pushing hard on price at the very start of the design process feels like good sense and it usually costs you money.
Before anyone has surveyed your block, a price is a guess. If you push a builder to sharpen a guess, you do not get a cheaper house. You get a thinner set of assumptions, more allowances, and a number that will move once reality arrives. The builder who gives you the lowest early figure is often the one who has thought about your block the least.
The right sequence is design first, then survey, then price, then negotiate. By then you are negotiating on something real.
Mistake Two: Assuming You Own The Plans You Paid For
Most people assume that paying for a design means owning it. Under Australian copyright law that is generally not how it works. Copyright in architectural drawings usually stays with whoever created them unless it is transferred in writing. What you typically buy is a licence to build that design once, on that block.
People find this out at the worst possible moment, when they take a design to a different builder to price it and discover they are not permitted to.
Ask two questions before you pay for any design work. Who owns the copyright in these drawings. And what exactly am I permitted to do with them if I do not build with you. Get the answer in writing.
How we handle this: if you choose not to build with us, we’ll wish you well and make the transition as smooth as possible. Once your design fees are paid in full, you’re welcome to use the plans with another builder.
Mistake Three: Not Knowing Why Most Designs Never Get Built
A large proportion of home designs never make it to construction. Not because the client changed their mind, but because the design was never costed against the block it was drawn for.
The pattern is always the same. Someone falls in love with a plan. The plan is priced properly. The price includes the earthworks, the retaining, the footings the actual soil requires and the overlay requirements nobody mentioned. The number lands well beyond budget. The design gets shelved and the money spent on it is gone.
Get the block surveyed and assessed before the design is finalised, so the design and the budget grow up together.
Mistake Four: Not Understanding How Variations Are Priced
This is where most budget blowouts actually come from.
A fixed price item is priced. An allowance is a placeholder with a number beside it, and when the real cost arrives you pay the difference. A contract can be described as fixed price and still be half allowances. Two builders can quote the same house at very different numbers purely because one has priced the selections and the other has not.
Ask any builder for the allowance schedule. Then ask three things. How many items are allowances. What happens when one is exceeded. And do I approve the extra before the work is done, or find out at the next progress claim.
Mistake Five: Not Reading The Contract Proposal Properly
Most people read the price and the completion date and skim the rest. The parts that matter most are the parts nobody reads.
- The allowance schedule, and how much of the total it represents.
- What triggers an extension of time, and whether the list is so broad that no date is really committed.
- What happens to the price if the soil classification comes back worse than assumed.
- The progress payment schedule, and whether the amounts match the work actually completed at each stage.
- What is expressly excluded. Driveways, landscaping, fencing, letterboxes, clotheslines and site clean are the usual ones.
- The defects liability period, and what happens after it ends.
If your builder will not walk you through those six line by line before you sign, that is the answer to a different question you were also asking.
Mistake Six: Not Spotting A Difficult Builder Early
You can usually tell in the first fortnight, well before any money changes hands, and the tell is almost always communication.
Watch what happens when you ask a question with an uncomfortable answer. Do you get a straight response quickly, or a reassuring non answer slowly. Watch whether you have to chase for things you were promised. Watch whether the person selling to you is the person who will run your job.
Then ask the question that sorts most of it. What happens on my build when the person running it is on holiday for a fortnight. If the honest answer is that things stop, you have found your risk, because that business runs on one person's memory rather than on a system.
We keep you informed at every stage, at least once every week, by phone, email and through our online building management portal.
Mistake Seven: Choosing On Price And Finish Alone
Every new home looks good on handover day. The workmanship you cannot see, in the footings and the frame and the waterproofing, only declares itself years later.
It breaks my heart watching people build without knowing what they are really getting, because everything looks fine at first and the underlying problems arrive later, often worse than the home that was replaced.
Ask to see a house the builder finished more than five years ago, and ask to speak to that owner rather than a recent one. Recent clients are still in the honeymoon. Five year clients know exactly what the workmanship was worth.
What A Custom Home Costs To Build In Brisbane
Starting costs and ranges are dependant on design/selections/land. $3000-$5000/m2 is the typical range of where our builds start. The house itself is the predictable half. It is the block that moves the number:
- Fall across the building envelope, which drives excavation, retaining and spoil removal.
- Soil classification, which drives the footing design and whether you need piers.
- Sewer or on site wastewater treatment, which on acreage also affects where the house can sit.
- How far power and water have to be run from the street.
- Driveway length, fall and surface.
- Overlays. Bushfire, flood, storm tide, character or heritage.
- Water storage and firefighting supply where required.
We price these from a survey rather than carrying them as allowances, which is why our estimate takes longer to produce than a quote off a floor plan, and why the final number resembles it.
Do You Need An Architect As Well As A Builder?
Not if your builder designs. We are a design and build company, so one team takes you from concept to handover. Engaging an architect and a builder separately typically runs around $60,000 in project fees on a $1.2 million contract. Our fee for working drawings and an estimate is capped at $10,000, so roughly $50,000 stays in the build instead of going to fees.
The bigger benefit is that there is no gap. When the person who drew it is not the person who has to build it, the site costs and the buildability details are where the two disagree, and you pay for that disagreement in variations.
How Long It Takes
4 weeks for council approval, then 52 weeks of construction so roughly 12 to 18 months from total signed contract to handover. Acreage and sloping blocks usually add time at the approval end rather than the construction end, because of overlay assessments and wastewater applications.
The Five Stages, And What Happens In Each
- We visit your block and you get a concept plan and an estimate. You are not committed to anything. If you do not love the concept we redesign it at no charge and take $1,000 off your contract.
- You sign a preliminary agreement and we produce working drawings, the floor plan, site plan, elevations and roof plan.
- You go through inclusions and selections, so the contract is priced on what you actually chose rather than on allowances.
- We issue a tender contract priced on those selections, you approve it, and we invoice the deposit.
- We build, you hear from us at least weekly and can see progress through the portal, and you get handover on a date we committed to.
Behind those five stages sit 47 detailed systems and around 500 individual tasks. I came up as an apprentice on jobs where everything lived in the boss's head, and when the boss was away nobody knew what was happening. The systems exist so your build never depends on somebody remembering something.
How We Design Around Your Block
Before anything is drawn we assess your land and design to what is actually there. The aspect, so living areas catch winter sun and are easy to shade in summer. The views. The breezes, and which direction they come from on your block rather than in general. The slope, and whether to reshape the land to suit a plan or step the house with the ground, which usually costs less and looks better.
None of those can be fixed after the slab is poured.
The Five Questions To Ask Any Builder Before You Sign
- How much of this price is fixed, and how much is an allowance?
- What happens when an allowance is exceeded, and do I approve it first?
- How many jobs are you running right now?
- Who owns the copyright in the drawings if I do not build with you?
- Can I see a home you finished more than five years ago, and speak to the owner?
Ask us the same five. We would rather you asked everyone.
Where We Build
We are based at North Lakes and build across north Brisbane and the Moreton Bay region, including Brisbane to the sunshine coast. We take on a limited number of homes each year, We take on a limited number of homes each year, 10 jobs depending on size, so I am personally across every job.
Bring your block address and we will tell you straight away whether we are the right fit, before anyone talks about money.