"How long will it take?" is one of the first questions every homeowner asks, and one of the hardest to answer honestly. The brochure talks about weeks on site. Your rent and loan interest care about the whole journey, from first meeting to keys.
The figures below come from Constructor's own build programs, for a single-storey project home in South East Queensland on a reasonably flat block. They're typical guides, not promises. If you're asking how long to build a house in your situation, use these as a starting point and test them against your builder's program.
C2 - Before Site Start Checklist
$59.00 AUD
Last updated 5 Oct 2026 · Revision 1 · Free updates for life
Checklist Type: Minor
Form Factor: Fillable, print-ready PDF (A4, 11 pages)
When to use: Pre-construction (after contract, before the builder starts)
A 78-point site readiness checklist. Find access, approval, service, tree and retaining issues before work begins, so you can plan time and cost before the builder starts.
How long to build a house: the big picture
The build has two halves, and the first one surprises people.
- Pre-site (PSA to site start): about 9 months.
- On site (site start to practical completion): about 3 to 6 months.
- Handover (practical completion inspection to keys): about 1 to 2 weeks.
So for a straightforward single-storey home, plan on well over a year from your first paid step with a builder to moving in. Double-storey homes, sloping sites and custom designs take longer.
Before site start: why it takes months
Most of the waiting happens before anyone turns a sod.
- Pre-contract (PSA, drawings, selections, contract): about 8 to 13 weeks.
- Approvals (building and plumbing): about 4 to 6 weeks, longer if you need a development approval or a boundary relaxation.
- Finance, then a commencement notice and site start date: the rest of the 9 months, depending on your lender and the builder's workload.
That last step catches people. Builders generally won't issue a commencement notice or allocate a site start until your lender confirms the funds are in place and you've shown proof of land ownership. If the land isn't titled yet, add that wait too. My overview of the design and approval process walks through these early steps.
On site: stage by stage
Here's a typical spread across the construction stages. Times are in working days (Monday to Friday, excluding public holidays and the Christmas shutdown).
- Base (site set-up, earthworks, piers, under-slab plumbing, slab pour): 8 to 20 working days, about 2 to 4 weeks.
- Frame (wall frames, trusses, roof covering, windows delivered): 8 to 20 working days, about 2 to 4 weeks.
- Enclosed or lock-up (wall wrap, rough-in, brickwork or cladding, windows and external doors): 12 to 25 working days, about 3 to 5 weeks.
- Fixing (plasterboard, waterproofing, cabinets, doors, tiling): 22 to 40 working days, about 4 to 8 weeks.
- Practical completion (painting, fit-off, floor coverings, external works, cleaning, final inspection): 10 to 20 working days, about 2 to 4 weeks.
Stages overlap, because trades often start the next stage before the last one is fully finished. So the stage figures don't simply add up to the total.
Working days aren't calendar days
This is why "60 to 125 working days" turns into 3 to 6 months on the calendar.
- Weekends and public holidays don't count.
- The Christmas shutdown often takes 2 to 3 weeks out of the program.
- Rain stops site works, slab pours and roofing.
When a builder quotes a build time, ask whether it's working days or calendar days, and whether it starts from site start, slab or something else. An advertised "build time" that starts at slab leaves out the base stage entirely.
What stretches your build
These are the usual reasons a build runs long:
- Wet weather, especially during site works and the slab.
- Trade shortages, when the next trade in the run isn't available.
- Long-lead items such as windows and custom joinery.
- Variations you request after signing.
- Approvals that need extra information.
- Bank valuers inspecting and approving progress claims.
- Inspections that find problems needing rework.
- Late selections or slow paperwork from you.
Your build moves at the pace of its slowest step. I explain why in why your build waits on one thing at a time.
How long to build a house: what your contract says
In Queensland, a regulated building contract must state the date for the start of work on site and the date for practical completion, or how each date is worked out. The builder also warrants the work will be carried out with reasonable diligence.
So the real answer is in your contract. Check:
- The start date, or the trigger that sets it.
- The number of days to practical completion, and whether they're working or calendar days.
- Allowances for rain and the Christmas shutdown.
- How extensions of time are claimed. The builder must claim in writing within 10 business days of becoming aware of the cause and extent of a delay.
- The liquidated damages rate. This is what the builder pays you per day if they finish late without a valid extension. Make sure it's filled in and reflects your real costs, such as rent.
Have your contract reviewed before you sign so these clauses actually protect you.
How to plan your rent and loan
For most people, the hardest part isn't the price. It's paying rent and loan interest at the same time.
- Plan on the contract build time plus at least three months.
- Line up your lease with realistic completion, not the brochure. A periodic lease, or one you can extend, gives you room.
- Remember interest grows as each stage is drawn down, so the last months cost the most.
- Start finance early. Slow finance means a later site start.
Before work starts, walk the site with our C2 Before Site Start checklist. Access, services, levels and approvals sorted early means fewer stoppages later.
The short version
For a single-storey project home in South East Queensland, plan on about 9 months from PSA to site start, 3 to 6 months on site, and 1 to 2 weeks for handover. Weather, finance, approvals, variations and the Christmas shutdown all stretch it. Your contract, not the brochure, sets the dates that matter.
Plan your rent and loan on the contract time plus a buffer, and you'll sleep better.
FAQs
How long does it take to build a house in Queensland once work starts?
For a single-storey project home on a reasonably flat block, about 3 to 6 months from site start to practical completion. Double-storey, sloping or custom homes take longer.
Why does it take so long to get to site start?
Drawings, selections, the contract, approvals and finance all happen first. Builders generally won't set a site start until your lender confirms the funds.
Is the build time in my contract in working days or calendar days?
It depends on the contract. Check the schedule, and ask the builder to confirm in writing.
What happens if my builder finishes late?
If they finish after the contract date without valid extensions of time, you may be entitled to liquidated damages at the rate in your contract. Get advice before deducting anything.
