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Where the time actually goes
A lot of the granny flat project time is not construction. The build itself is 12-14 weeks; everything before it is design, testing, documentation and approvals. Where a planning permit is required, we run documentation alongside the council application rather than after it — which is where the shortest realistic timeline comes from.
7 Stages
48 Hours
$0 -First 2 Stages
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12-14 Weeks on Site
The same seven stages on every project.
What happens, what it costs, and how long it takes.
Our Process
01
Consultation & advice
A conversation, not a sales pitch — by phone or in our Kilsyth South showroom.
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Designs matched to your block
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Desktop site assessment
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Title, overlays and easements checked
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An early read on council
Complimentary · 30–60 minutes
02
Project proposal
A written proposal in your hands within two working days.
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Estimated construction cost
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Your options and upgrades, priced
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Statutory fees for your council
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Provisional items marked as provisional
Complimentary · Within 48 hours
03
Design & site report
Your project becomes real, and the site gets tested properly.
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Preliminary working drawings
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Soil classification and wind rating
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Site feature survey
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BAL assessment where required
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Your Construction Manager assigned
From $8,000 + GST · 3–7 weeks
04
Council permits
Not every site needs a planning permit. Where yours does, we handle the whole application.
Application lodged and managed
Land Capability Assessment
Bushfire or flood overlay reports
Arborist report where required
Planning approval secured
$4,000–$10,000 + GST, where required · 12–24 weeks
05
Specification, selection & documentation
The enjoyable part — where a plan turns into your home.
Colours, finishes and fixtures chosen
Final construction drawings
Specification schedule
Structural engineering
7-Star Energy Rating
From $7,500 + GST · Engineering $2,500–$4,000 · 5–10 weeks
06
Contract & building permit
Every inclusion, allowance and cost documented before you sign a thing.
HIA New Home Building Contract
Fixed inclusions and allowances
No open-ended items
Your building permit
A construction start date
5% deposit on signing · 2–8 weeks
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Standard, not extra
Feature tiling, double-glazed windows, engineered flooring and a 7-star energy rating are standard across the range. Upgrades are named as upgrades, in writing, before you choose a thing.
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07
Construction
Six inspected stages, one point of contact, and a progress claim at each.
Base — stumps and base complete
Frame — floor, wall and roof
Lock-up — roof, walls, windows, doors
Fixing — linings, cabinetry, fixtures
Practical completion and handover
Progress claims at each stage · 12–14 weeks on site
25 +
Years building
Built under a Domestic Builder Unlimited registration, backed by Katana Building Services and more than 25 years of residential construction across Melbourne's east, south-east and the Mornington Peninsula.
DB-U
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Every stage ends with something in your hands
Building should feel like progress you can hold. Every stage ends with something real — a proposal, your drawings, the site report, the contract — and nothing moves forward until you've seen it and you're happy. You'll always know where your home is up to, and who to call.