Building a home looks simple in the brochures: pick a floor plan, choose a facade, move in six months later. In real life, there’s soil reports, progress payments tied to milestones you need to verify yourself, and a list of exclusions buried in the fine print of your contract. This guide walks through the process in the order it actually happens, so you know what to check before you sign anything and what to watch for once the slab goes down.
Step 1: Work Out Your True Budget, Not The Quoted Price
The amount on a builder’s brochure is seldom your all-up cost. That’s their base build price. Add land, stamp duty, site works, service connections, driveway, fencing, and landscaping. Sprinkle 10-20% on top for upgrades and site costs. Then you’re in the ballpark.
This matters because site costs are the most variable and least transparent expense you’ll face. Two blocks that look similar on paper can throw very different figures at you during excavation. A flat, sandy block with easy access to services might cost very little to prepare. A sloped block with reactive clay could add tens of thousands before a single wall goes up. You don’t know until you know.
Step 2: Vet The Land Before You Fall In Love With A Design
It is common for most first-time builders to select their home design before properly evaluating the block of land. The land should be your first consideration since it determines what is achievable and the costs involved.
The first step is getting a soil report. In some areas, reactive clay and sandy soil are typical, and they impact footing design differently. A geotechnical survey informs your builder on what type of slab and footing construction your block requires, allowing for a more accurate estimation of your site costs. In addition to soil conditions, consider the slope of the land, its orientation, the zoning, and any covenants associated with the estate. For example, some blocks in the display village have facade or fencing guidelines that you only become aware of after you’ve selected a design that doesn’t comply.
Orientation warrants special consideration since the latest energy guidelines are more stringent. With the National Construction Code lifting the minimum energy efficiency requirement to a 7-star NatHERS rating, decisions such as window placement, glazing types, and insulation aren’t just about keeping your future home comfortable – they are compliance decisions that eliminate some home designs and features while adding to your costs right from the start.
Step 3: Decide Between A Custom Design And A Project Home Range
This decision will influence the rest of the process. Opting for a customized design ensures complete freedom regarding the floor plan, materials, and finishes, but you will have to wait longer, handle more intermediaries, and the costs will be less defined until the plans are finalized. Project builder designs sacrifice some of this freedom for quicker access to a finalized cost and a shorter waiting period.
Neither is the wrong decision, overall. For a standard block and standard requirements, a project home is likely to save you several months and provide a final cost earlier in the process. If you have a tricky block, or your requirements fall outside what “standard” design ranges can offer, take the time and pay the extra money. Be honest about your circumstances, not just about which route you would prefer.
Step 4: Shortlist Builders On Inclusions, Not Glossy Pricing
Once you know your budget range and design direction, start comparing builders properly. This is where a lot of buyers get burned because two quotes that look similar on the surface can differ by tens of thousands once you check what’s actually included.
Ask for a fixed-price tender and read through every line. Check what’s allowed for floor coverings, cabinetry, air-conditioning, and site works. Look closely at any provisional sums – these are placeholder allowances for items that haven’t been finalized, and they’re a common place for costs to blow out later if the actual selection exceeds the allowance. A builder quoting a lower headline price but skimping on these allowances isn’t actually cheaper; they’ve just moved the cost to a later stage of the process where it’s harder to negotiate.
Visit display homes to see the standard of finish in person – photos and floor plans don’t tell you how a kitchen bench actually feels or how much natural light a room gets. Once you have narrowed your criteria, start your shortlist of home builders Perth who operate in your target suburbs and check their display homes against your inclusion checklist. Walking through a display home with your list in hand makes it much easier to spot what’s genuinely standard versus what’s an upsell waiting to happen.
While you’re comparing builders, also check which contract template they use. Most builders work from HIA or Master Builders Association standard forms, and knowing which one is proposed lets you compare terms properly rather than assuming they’re all the same. Confirm the builder holds valid home indemnity insurance too – this is mandatory consumer protection in some places and a basic sign you’re dealing with a legitimate operator. Ask to see the certificate rather than taking their word for it.
Step 5: Understand Fixed-Price Versus Cost-Plus Contracts
Before putting your signature down, you need to be aware of what type of contract you are agreeing to. If you sign a fixed-price contract, the responsibility is on the builder if the cost of materials or labor increases while the construction is ongoing. You will pay the predetermined amount regardless of the cost increase of materials. For a cost-plus contract, you will be the one taking this risk. You will pay the actual cost plus the builder’s margin. This may be advantageous if the market prices remain stable but you will be at risk if the prices increase.
The majority of owner-builders will benefit more from a fixed-price contract as it will give you a more realistic budget. If the builder is insisting on a cost-plus contract, you should inquire about the reason. Sometimes, it is due to uncertain conditions on the site. However, sometimes builders do this to avoid committing to a number they know is too low.
Step 6: Set Up Progress Payments Tied To Real Milestones
Construction loans do not pay the total amount at once. Money is drawn down in stages, tied to build milestones. These are the typical milestones that banks will use:
- Slab stage – when the concrete slab on the ground is laid
- Frame stage – after the building’s frame has been installed
- Lock-up stage – when the doors, windows and roofing have been put on and the property can be locked up
- Fixing stage – when all the fittings such as cupboards and tiles have been installed
- Handover – when the home is complete and keys are handed over
This can also vary between different banks. However the most important thing is to get the payment schedule and check it against the builder’s milestones. Do not agree to pay before a milestone is complete. Your bank or lender will usually require evidence the milestone is complete before releasing the next drawdown, so aligning your own expectations with that process protects you from disputes later.
Step 7: Lock In Your Selections Early And Get Building Approval Sorted
Early on in the process, you’ll need to make your choice of colors, fixtures, and finishes from the builder’s range. Miss the window and you could be pushed out a month or two to the next available meeting, pay re-selection fees, or lose access to certain upgrade options altogether.
To avoid falling into this cycle, research your preferences before you even sign your contract. Know not just what you want, but the brand and model number of where you can get it and the exact variations on offer. Go in with your selections drilled down, because revealing midway through the meeting that you’re still “undecided” between black and white tiles is how you end up with expensive last-minute upgrades you hadn’t budgeted for.
At the same time, your building permit and council approvals need to be locked in before construction can legally start. Approval timing varies by council and can add weeks to your schedule if documentation isn’t submitted correctly the first time. Ask your builder directly how they’re managing this and build the expected timeframe into your overall schedule rather than assuming it’ll happen in the background without delay.
Step 8: Build Realistic Buffers Into Your Timeline
The estimated time of completion that you are given at the beginning is the ideal scenario. However, weather conditions, the availability of contractors, as well as potential delays in getting permissions can all postpone the project, and a reliable builder is aware of this.
So ask your builder for the timetable of each phase and if any allowances have been included. A timetable that lacks any space for the weather or for any delays in the contractor’s schedule is probably neither viable nor does it mean that these have been factored in somewhere else. It’s natural for things to get a little off track if the project is expected to last for several months. The key is whether your builder will inform you about delays as they happen rather than staying quiet until you ask.
Step 9: Get Independent Inspections At The Right Moments
You should not trust the supervision of the builder only to identify problems. You need to pay for your own independent building inspector at four different occasions: when the slab is poured, when the frame is complete, at lock-up, and at the end of the defects liability period. A slab defect that goes unnoticed will be a lot more expensive to fix later on once there are walls on the slab. The same goes for frame issues that are not dealt with promptly.
Independent inspections are relatively cheap compared to the total cost of building your new house. And you will have paperwork that is not under the custody of the builder, should you need it in a dispute.
Step 10: Treat Handover As The Start Of Quality Control
Practical completion is the formal point where the home is deemed ready and the final defect checklist gets documented – not the moment everything is guaranteed to be right. Walk through every room with a critical eye on handover day. Check paint finishes, tiling, cabinetry alignment, door and window operation, and every fixture you can test.
Document anything unfinished or inconsistent on a signed defect report before you accept handover. This matters because the defects liability period – commonly around three months under an HIA contract – starts ticking from that point, and the builder is only obligated to fix what’s been properly recorded. Anything you notice after that window closes becomes much harder to have addressed, so it pays to be thorough on the day rather than assuming you’ll circle back to it later.
Building a home rewards people who slow down at the start and ask uncomfortable questions before they sign anything. The buyers who end up frustrated are usually the ones who compared headline prices instead of inclusions, or who assumed a schedule would hold without checking the fine print behind it. Get the budget, the land, and the builder right in that order, and the rest of the process becomes far more manageable than the brochures ever let on.