Add $150k+ Value to Your Property with a Custom Granny Flat
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
Fixed price contract
Investment Properties
Purpose-built rental properties with guaranteed rental yields and tenant management.
7%+ rental yield
Tenant sourcing
Property management
Multi-Generational Living
Keep family close with accessible designs perfect for elderly parents or adult children.
Accessibility features
Privacy design
Independent living
Home Offices & Studios
Modern workspaces and creative studios separate from your main residence.
High-speed internet
Sound insulation
Climate control
Why Choose a Granny Flat?
Smart property investment with immediate and long-term benefits
$150k+
Increase Property Value
Average property value increase with a quality granny flat
$400-600/week
Rental Income
Generate consistent rental income in most Australian cities
12-16 weeks
Quick Build Time
From approval to completion, faster than traditional builds
100%
Council Approved
All designs pre-approved with major councils across Australia
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
Melbourne, VIC
⭐⭐⭐⭐⭐
"Professional service from start to finish. The council approval process was seamless and the build quality exceeded our expectations. Great investment decision."
David Chen
Sydney, NSW
⭐⭐⭐⭐⭐
"Having mum close by in her own space has been perfect. The accessibility features were thoughtfully designed and she loves her independence."
Maria Santos
Brisbane, 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) 2008VIC: Secondary dwellings under planning permits with specific conditions
QLD: Granny flats under development approval with council requirements
WA: Ancillary accommodation under planning approval
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)
$120k - $140k
Standard finishes, 1 bed, 1 bath
Premium (60m²)
$160k - $180k
Quality finishes, 2 bed, 1 bath
Luxury (80m²)
$200k - $240k
High-end finishes, 2 bed, 2 bath
What rental income can I expect?
Rental returns vary by location and property quality.
Average weekly rents:
Major Cities
Sydney: $500-650/week
Melbourne: $400-550/week
Brisbane: $350-480/week
Perth: $320-450/week
Regional Areas
Central Coast: $380-480/week
Gold Coast: $400-520/week
Geelong: $320-420/week
Newcastle: $350-450/week
Returns typically range from 5-8% annually based on construction cost.
How long does construction take?
Our typical timeline from contract to completion:
Design & Approval (2-4 weeks)Site survey, design finalization, council submission
Pre-construction (1-2 weeks)Permits, material ordering, site preparation
Construction (8-12 weeks)Foundation, framing, services, completion
Calculate Your Granny Flat Cost
Finish Level
Price Estimate
Total Build Cost:
$0
Estimated Weekly Rent:
$0/week
Annual Return:
$0/year
This is an estimate only. Final pricing depends on site conditions, council requirements, and design specifications.
Ready to Start Your Granny Flat Project?
Get your free consultation and site assessment today
iSpaces is a division of Equisearch Holdings Pty Ltd established in 1993. We are fully licensed, insured and a proud member of the
Master Builders Association.
Services
Design & Build
Investment Properties
Multi-Generational
Home Offices
Contact
© Copyright 2025 -all rights reserved