Granny Flat Construction Quote Template
Free granny flat construction quote template. Covers slab, frame, roofing, plumbing, electrical, kitchen, bathroom, and finishing for compliant granny flat builds.
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Or try it on the web →This granny flat quote template is for builders quoting new-builds up to 60m² in Australia. It covers standard slab-on-ground, timber or steel frame construction. The biggest mistakes we see are underquoting site preparation and forgetting council fees. A patch of grass looks cheap to build on until you hit rock or need to run services 50 metres from the main house. Using a granny flat quote template in an app like QuoteMate helps you track every variable, from excavation to the final private certifier inspection, ensuring your price is right.
How to Price the Core Structure of a Granny Flat
Your profit is made or lost on the big three: slab, frame, and roof. Price concrete per square metre, not just per cubic metre. A 60m² slab can cost $15,000-$20,000 ($250-$330/m²) including formwork, mesh, and labour. For framing, price MGP10 pine per lineal metre, currently around $7/m at Bunnings Trade, and add a 15% waste factor. Roofs are priced per square metre; expect to pay about $60-$80/m² for a standard Colorbond roof, supplied and installed. Labour on a typical frame and roof package will run you about $15,000-$25,000 depending on complexity.
Forgetting These Items Will Cost You on a Granny Flat Build
It's the small things that add up. Site access is a big one; if you can’t get a standard truck in, you’ll need to budget for a mini-excavator at $500/day plus operator. Soil and rubbish removal requires skip bins, costing $400-$800 each. Don't forget statutory costs. Council DA or CDC application fees, private certifier stage inspections, and mandatory termite management (as per AS 3660.1) can easily add $10,000 to the job before you've even broken ground. These are real costs, not optional extras. Include them as separate line items so the client sees the value.
Materials Included
- Concrete slab and footings
- Timber or steel frame
- Roofing (Colorbond)
- External cladding
- Internal plasterboard and insulation
- Kitchen and bathroom fixtures
Quoting Steps
- 1Confirm granny flat size and layout
- 2Check council requirements and CDC/DA
- 3Quote slab, frame, and roofing
- 4Add plumbing, electrical, and HVAC
- 5Include kitchen, bathroom, and finishes
- 6Break into progress payment stages
Frequently Asked Questions
This varies by council. Budget $5,000-$10,000 for standard fees, certifiers, and inspections. Water, sewer, and electricity connections can add another $5,000-$15,000 depending on the site's distance from the mains. Always get a specific written quote from the local utility providers before you finalise your price for the client.
For a standard 60m² build on a level block, a 10% contingency is the minimum for material price shifts and small client changes. If it's a tricky site with poor access or a steep slope, push that up to 15-20%. Anything less than 10% is asking for trouble on a fixed-price contract.
Yes, it's mandatory under the National Construction Code and AS 3660.1. You must include a termite management system. This could be a physical barrier installed during the slab pour or a chemical reticulation system. Forgetting this will fail your inspection and can cost you thousands to fix later.
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