From Contract to Slab Down: What Happens in the First 90 Days of Your Perth Home Build

Signing your building contract is one of the most exciting moments in the first home buyer journey. But once the paperwork is done, a common question follows: what actually happens next?

For most first home buyers in Perth, the period between signing and seeing construction begin is the most confusing part of the process. You know something is happening, but you are not sure what, or when. That uncertainty can make the wait feel longer and more stressful than it needs to be.

The good news is that the pre-construction phase follows a clear, predictable sequence. Every step has a purpose. Every approval unlocks the next stage. Understanding what happens, and why, turns a confusing waiting period into a process you can follow and plan around.

This article walks you through every stage of a Perth home build from contract signing to slab down, so you know exactly what to expect in the first 90 days.

Key Takeaways

• The pre-construction phase covers permits, soil testing, a pre-start meeting, and site preparation before any concrete is poured.
• Building permits are a legal requirement before construction can begin in Western Australia, lodged by your builder with the local council.
• B1 Homes’ typical target is 9-12 months from contract to handover – a target, not a guarantee.
• B1 Homes builds exclusively in double brick on flat, sandy-site blocks within new land estates across Perth’s growth corridors.
• Every completed B1 Homes build carries a 6-year WA structural warranty and 12-month defects period under the Home Building Contracts Act.

Why the First 90 Days Matter for First Home Buyers

The Gap Between Signing and Starting

Construction does not begin on the day you sign your contract. Before a single shovel breaks ground, a series of approvals, assessments, and preparations must happen.

This pre-construction phase is not wasted time. It is essential groundwork – the legal, engineering, and logistical foundation your build depends on. Skipping or rushing any step creates problems later.

Understanding this phase helps you set realistic expectations. It also helps you recognise when a build is progressing normally and when something may have stalled.

How Timeline Certainty Affects Your Budget

Every week between signing and slab down is a week you are likely still paying rent. That is real money, and for first home buyers in Perth managing tight budgets, it adds up quickly.

Knowing your expected start date helps you plan. You can give your landlord appropriate notice, arrange temporary storage if needed, and avoid paying rent and build costs at the same time for longer than necessary.

A builder with a clear, well-managed pre-construction process moves through this phase efficiently. That means less overlap, less cost, and less stress for you.

The First 30 Days: Approvals and Groundwork

Contract Finalisation and Deposit

Once your building contract is signed and your deposit is processed, your build is locked into the construction schedule. You will receive a welcome pack that outlines your build timeline, your key contacts, and what to expect at each stage.

Your dedicated new homes specialist becomes your main point of contact from this moment. They will keep you updated as approvals come through and answer any questions along the way.

This is also the stage where you confirm your house and land package details – your block, your design, and your inclusions are all locked in from day one. Standard inclusions vary by package and current promotion and are confirmed in writing before contracts are signed.

Building Permit Application

Your builder lodges a building permit application with your local council shortly after signing. This permit is a legal requirement before any construction can begin in Western Australia.

The application confirms that your home design meets the Building Code of Australia, local planning rules, and any estate covenants that apply to your block. It includes your approved floor plan, site plan, engineering specifications, and energy efficiency rating.

Your builder handles the entire application. You do not need to contact the council or complete any forms yourself. Processing times vary by local authority – your new homes specialist will give you a realistic expectation for your specific area.

Browsing home designs before this stage means your floor plan is already confirmed and ready to submit, with no delays waiting on design decisions.

Soil Testing and Engineering

While your building permit is being processed, a geotechnical engineer tests the soil on your block. Soil testing determines what type of foundation your home requires.

Perth’s soil varies across the metro area, and each soil type requires a different footing design. Getting this right protects your home from cracking or movement over time.

The engineer produces a report that specifies your footing type. Your builder uses this report to finalise your slab engineering before construction begins.

Weeks Three and Four: Your Pre-Start Meeting

What Happens at a Pre-Start Meeting

Around weeks three and four, you will attend a pre-start meeting with your site supervisor. This is your final planning session before construction begins.

You will review your floor plan, confirm colour selections, lock in any variations or upgrades, and go over the construction schedule. You will also meet the site supervisor who will manage your build from this point forward, and get their direct contact details.

Think of the pre-start as your last chance to fine-tune before things become permanent. Visiting display homes in Perth before your pre-start meeting is a smart move. Seeing a completed home helps you visualise your selections and ask better questions on the day.

What to Prepare Before You Attend

The pre-start meeting runs more smoothly when you arrive prepared. Finalise your colour selections, tapware choices, and any upgrades before you walk in. Last-minute changes at pre-start can delay the permit submission and push back your site start.

Bring a list of questions. If anything in your floor plan is not clear, or you want to understand how a particular finish will look, this is the right time to ask.

Your new homes specialist can help you prepare for the meeting. Reach out in the week before if anything is unclear.

Months Two and Three: Site Preparation and Scheduling

Building Permit Issued

Once your building permit is approved, your builder receives formal clearance to commence construction. This is a major milestone – it means all regulatory requirements are satisfied and your build is legally approved to proceed.

You will receive a copy of the permit for your records. Keep it – it confirms your home has met all council and building code requirements.

With permit in hand, your builder confirms your construction start date. Exploring house and land packages across Perth gives you a sense of which estates and suburbs are moving through this stage most efficiently right now.

Site Preparation and Earthworks

Before your slab can be poured, the block needs to be prepared. A surveyor pegs out the exact position of your home on the block, ensuring correct setbacks from boundary lines.

B1 Homes builds on flat, sandy-site blocks within new land estates across Perth’s growth corridors. Site preparation on these blocks involves compacting the building pad and confirming the surface is ready for footings. Your builder coordinates all of this with experienced contractors who know Perth’s conditions well.

Site preparation is one of those stages that is easy to underestimate. Done properly, it sets up everything that follows.

Footings, Formwork, and Steel

In the days before your slab is poured, footings are dug around the perimeter of your home. Footings are deep concrete trenches that anchor your home to the ground and provide structural support.

Formwork is then set up to hold the concrete in the correct shape as it sets. Steel reinforcement, known as rebar, is laid throughout to strengthen the slab and resist cracking.

In Perth, where summer heat and varied soil conditions put stress on concrete, this reinforcement is particularly important. A well-engineered slab is the foundation everything else depends on.

Underground Services

Before the slab is poured, all underground plumbing and electrical conduits are installed. This includes water supply lines, sewer pipes, stormwater drainage, and conduits for power points and lighting.

These services are inspected and tested before being covered. Once sign-off is received, the slab is ready to pour.

Slab Down: What Happens on Pour Day

The Concrete Pour Explained

Pour day is the moment your build moves from plans on paper to concrete on the ground. A concrete truck arrives on site and pours the slab in one continuous pour – no joints or seams that could become weak points.

The concrete is levelled, smoothed, and finished by hand to create a flat, even surface. Once poured, it needs time to cure and reach full strength before construction on top can begin.

Visiting the Fitzroy display home gives you a clear picture of what a completed double brick build looks like once construction is underway.

What Comes After the Slab

With the slab down, your build moves into the brickwork stage. Double brick walls form the structure of your home. Roof trusses follow, then roofing, windows, internal fit-out, and final finishes.

B1 Homes’ typical target is 9-12 months from contract to handover – a target, not a guarantee. Timelines vary based on land title status, council processing, design complexity, and site conditions. Your site supervisor provides a build schedule so you always know what is coming next.

Progress updates and regular check-ins keep you informed throughout. You are never left guessing about where your build is up to.

How to Keep Your Build on Track

What the Builder Manages

Your builder coordinates the entire pre-construction and construction process – permits, soil testing, trade scheduling, site supervision, and progress reporting. An experienced in-house site supervisor manages your build from contract to handover.

This single point of accountability matters. You are not dealing with a different person at every stage. One supervisor knows your build inside out and is responsible for keeping it on schedule.

What You Need to Do

There are a few things on your side that keep the process moving smoothly.

Finalise your selections before your pre-start meeting. Decisions made late – like changing a tile or adding a power point – can trigger a variation process that delays your start date.

Respond quickly when your builder needs a signature, a document, or a decision. Delays on your end flow directly into the build schedule.

Keep your finance in order. Make sure your loan is approved and ready to draw down at each stage. A lender delay can hold up a construction draw and pause the build. The Lets Finance team can help you stay on top of your finance milestones throughout the build.

Stay in contact with your new homes specialist. If your circumstances change or something is not clear, reach out early. Small issues are easy to resolve when caught quickly.

From Signing to Slab: You Are More Ready Than You Think

The first 90 days of a Perth home build involve a lot of moving parts – permits, soil tests, pre-start meetings, site prep, and finally the slab pour. But each step is managed, sequenced, and purposeful.

For first home buyers in Perth, understanding this process takes the mystery out of the wait. You know what is happening, why it is happening, and what you need to do to keep things moving.

B1 Homes guides first home buyers through every stage of the building process in Western Australia, from the day you sign to the day you get your keys. Part of Scott Park Group, with Sumitomo Forestry Co. Ltd having taken a stake in December 2019, B1 Homes combines local expertise with the stability of an established group. Every home is built exclusively in double brick, with a 6-year structural warranty and 12-month defects period.

Conclusion

The pre-construction phase is not a delay – it is the foundation your build depends on. Permits, soil testing, pre-start preparation, and site works all happen before the slab is poured, and each step is essential.

Understanding the sequence means you can plan your finances, manage your rental situation, and move into your new home with confidence.

Contact the B1 Homes team to get first home building advice about timelines, house and land packages in Perth, and what to expect during your build, or call (08) 9261 3100 to speak with a new homes specialist.

FAQs: From Contract to Slab Down in Perth

How long does the pre-construction phase take for a Perth home build?

The pre-construction phase – from contract signing to slab pour – typically runs across the first 60 to 90 days, depending on council permit processing times, soil test results, and how quickly pre-start selections are finalised. Your new homes specialist will provide a realistic timeline based on your specific block and local authority.

Who lodges the building permit application?

Your builder lodges the building permit application with your local council on your behalf. You do not need to contact the council or complete any paperwork yourself. Processing times vary by local authority – confirm the expected timeframe with your new homes specialist at the start of your build.

What happens at a pre-start meeting?

The pre-start meeting is your final planning session before construction begins. You confirm colour selections, lock in any upgrades, review your floor plan, and meet your site supervisor. Any changes made after this meeting may trigger a variation that delays your site start, so arrive prepared.

Does B1 Homes build on sloping blocks?

No. B1 Homes builds exclusively on flat, sandy-site blocks within new land estates across Perth’s growth corridors. It does not build on sloping sites, hillside blocks, or inner-city infill land.

What is the build time target for a B1 Homes home?

B1 Homes’ typical target is 9-12 months from contract to handover. This is a target, not a guarantee. Timelines vary based on land title status, council processing, design complexity, and site conditions. B1 Homes is a home builder, not a land developer – it partners with land developers and sources lots through established estate relationships.