TRASBUILD
TRASBUILD
Toowoomba's favourite Granny Flat Builder is now offering more incentives
Sign a building contract before 31st Dec, 2025
and receive a $3,000 Visa Gift Card.
Australia's #1 granny flat builders. Government-approved designs, fixed-price guarantee, and completed in just 12-16 weeks. No surprises, just results.
Our Granny Flat Services
From design to completion, we handle everything to create your perfect granny flat
Custom Design & Build
Tailored granny flats designed to maximize your space and match your home's style.
3D designs
Council approval
Plans can be adjusted
6 Year QBCC Warranty
Backed by an industry-leading QBCC warranty for 6 years and 6 months.
Structural Protection
Financial Protection
Full coverage
Fixed Price Contracts
We promise that you won't be surprised by unforeseen extras in our contracts.
Easy-to-read contracts
Backed by Master Builders
12-16 week build time
30 Years Experience
Deal direct with a Builder that has over 30 years experience in the region.
Deal with Builder/Director
Same Trades on all jobs
5 Star Rated team
For current builds, view our Instagram and Facebook Pages
Why Choose a Granny Flat?
Smart property investment with immediate and long-term benefits
$150k+
Increase Property Value
Average property value of your home increases
$300-500/week
Rental Income
Generate consistent rental income for your family
12-16 weeks
Quick Build Time
From approval to completion, faster than traditional builds
100%
Council Approved
All designs pre-approved with your local council
What Our Customers Say
⭐⭐⭐⭐⭐4.9/5 from 200+ reviews
⭐⭐⭐⭐⭐
"The team delivered exactly what they promised. Our 60m² granny flat was completed in 14 weeks and now generates $520/week rental income. Couldn't be happier!"
Sarah Mitchell
Warwick, QLD
⭐⭐⭐⭐⭐
"Professional service from start to finish. The council approval process was seamless and the build quality exceeded our expectations. Great investment decision."
David Chen
Toowoomba, QLD
⭐⭐⭐⭐⭐
"Having mum close by in her own space has been perfect. The accessibility features were thoughtfully designed and she loves her independence."
Maria Santos
Gold Coast, QLD
Granny Flat Guide
Everything you need to know about building a granny flat in Australia
What planning permission do I need for a granny flat?
In most Australian states, granny flats under 60m² can be built under complying development, meaning faster approval. Requirements vary by state:
NSW: Up to 60m² under SEPP (Exempt and Complying Development Codes) 2008
QLD: Granny flats under development approval with council requirements
We handle all council approvals and ensure your design meets local requirements.
How much does a granny flat cost to build?
Granny flat costs vary by size, finishes, and location:
Basic (40m²)
$100k - 1 bed, 1 bath
Standard finish
2 Bedroom (60m²)
$150k - 2 bed, 1 bath
Standard finish
2 Bedroom (80m²)
$200k - 2 bed, 2 bath
Standard finish
What rental income can I expect?
Rental returns vary by location and property quality.
Average weekly rent in regional Qld:
$300-$500/week
Brisbane, Sydney and Gold Coast and the returns typically range from 5-8% etc.
How long does construction take?
Our typical timeline from contract to completion is 12 to 16 weeks.
Granny Flat Cost Calculator
Get an instant estimate for your investment property
Property Details
*Inner metro rates shown. Regional rates are ~15% lower.
1 Bedroom
40m² compact
$300/week*
2 Bedrooms
50m² comfortable
$400/week*
3 Bedrooms
60m²+ spacious
$500/week*
Investment Summary
Total Build Cost
$125,000
Monthly Mortgage
$670
$8,040/year
5% over 30 years
Weekly Rent
$400
$20,800/year
Net Annual Return
$12,760
Rent minus mortgage
Net ROI
10.2%
After mortgage payments
⚠️ Disclaimer: This is an estimate only. Final costs depend on site conditions, council requirements, and market conditions. Rental estimates are indicative only.
What's Included in Your Granny Flat
Full Electrical
Complete wiring and fixtures
Plumbing
Kitchen and bathroom complete
Turnkey Ready
Move-in ready condition
Council Approved
All permits and approvals
Ready to Start Your Granny Flat Project?
Get your free consultation and site assessment today
TrasBuild dedicated to bringing your construction and remodeling visions to life. Our team is committed to providing high quality, customised construction solutions, tailored to meet your unique needs and preferences.
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