Licensed Builder - Illawarra's Trusted Choice
Granny Flats Illawarra
Build a Granny Flat That Pays for Your Property
CDC-approved granny flats designed specifically for property investors in NSW who want to increase rental income, reduce holding costs, and get tenants in faster.
Fixed-design plans that pass CDC approvals
Fast, predictable build timelines
Designed for maximum rental yield
Fully managed from enquiry to tenant-ready handover
What We Do
Granny Flats Designed for Property Investors
We design and build fixed-design, CDC-approved granny flats across NSW, specifically engineered for property investors who want to increase rental income and reduce holding costs.
Our entire model is built around three things:
Speed. Certainty. Return on Investment.
Instead of offering custom builds or long DA approval processes, we provide a small range of pre-engineered granny flat designs that:
Fit the majority of suburban blocks
Consistently pass CDC approval
Can be delivered faster than traditional builds
Require minimal decisions from the client
From your first enquiry to the final handover, we manage the entire process end-to-end. The result is a tenant-ready granny flat designed to start generating income as quickly as possible.
Featured Designs
Ember
25sqm 1 1
Price Range
$200,000 – $250,000
Compact, cozy option perfect for singles or couples seeking simplicity and efficiency.
Horizon
60sqm 2 1
Price Range
$230,000 – $300,000
Balanced in size, offering comfortable living space with room for flexibility.
Peak
60sqm 2 1
Price Range
$230,000 – $300,000
Spacious design for families or those wanting extra comfort and functionality.
Pavillon
60sqm 2 1
Price Range
$230,000 – $300,000
Generous layout, suited for multi-generational living or premium lifestyle needs.
Who This Is For
Built for Investors Who Want Better Cashflow
Our clients already own property and want to improve their investment performance.
Property Investors Under Cashflow Pressure
Many investors today are losing $400–$700+ per week holding property due to rising interest rates.|
A granny flat can dramatically improve the numbers by adding a second rental income stream.
First-Time or Early-Stage Investors
Some investors want to grow their portfolio but are limited by borrowing capacity.
A granny flat allows them to increase income from the property they already own, without needing to buy another property.
Yield-Focused Investors
Some investors simply want the highest return possible under ~$300k.
They prefer systems and proven processes over custom builds.
They want:
Speed
Predictability
Strong rental yield
Minimal effort
What All Our Clients Want
More income
Less stress
Speed and certainty
A proven solution
Our End-to-End Process
From First Call to Tenant-Ready Granny Flat
Our system is designed to remove uncertainty, delays, and decision fatigue.
1
Discovery Call
We start with a discovery call where we:
Understand your property and investment goals
Confirm whether a granny flat is the right strategy
Explain our CDC-only, fixed-design approach
Discuss expected rental returns and timelines
2
Pre-Construction Contract
If the project is suitable, we move forward with a Pre-Construction Contract.
This secures your build slot and allows us to:
Finalise the design
Engage consultants (survey, engineering, energy)
Start the CDC approval process
3
CDC Approval
During this stage we:
Finalise drawings using one of our fixed designs
Coordinate all consultants
Manage the entire CDC approval process
Once approved, the project moves into construction.
4
Construction Contract
After approval:
- Final pricing is confirmed
- A Construction Contract is signed
- Build start date is locked in
This separates approvals from construction and keeps risk controlled for both
parties.
5
Construction
Our builds follow a systemised process designed for speed and consistency.
We manage:
All trades and scheduling
Inspections and compliance
Site coordination
Progress communication
Our fixed designs allow for faster and more predictable timelines.
6
Handover
At completion you receive a fully compliant, tenant-ready granny flat, including:
All certificates and documentation
Clean professional handover
Ready for immediate leasing
Granny Flat is ready to generate income!
What Makes Us Different
Built Specifically for Property Investors
Most granny flat builders focus on custom homes.
We focus on cashflow.
Every design, material, and process decision is made to maximise:
- Rental yield
- Build speed
- Long-term durability
Fixed Designs = Faster Builds
By limiting design options we eliminate delays and complexity.
This means:
Faster CDC approvals
Faster construction timelines
Lower risk of cost blowouts
Tenants moving in sooner
CDC-Only Specialists
We focus exclusively on CDC approvals, avoiding the uncertainty and delays associated with council DA approvals.
This avoids:
- DA delays
- Council uncertainty
- Long approval timelines
This allows projects to move forward much faster.
We Protect Your Existing Rental Income
A major investor concern is losing rent from the main house during construction.
We help avoid this by:
Advising on fencing before leasing
Ensuring leases exclude the granny flat site
Structuring the property as two separate dwellings from day one
Low Effort for the Client
Our process is designed to be simple.
You:
Choose a design
Approve key stages
We handle everything else.
Example Case Studies
Granny Flat Example Case Studies — Results Across the Illawarra
Seeing is believing. Below are two examples of what Granny Flats Illawarra delivers for property owners across the Illawarra region — from the initial discovery call through to tenant-ready handover.
Dapto Investment Property — From Negative Gearing to Positive Cashflow
📍 Location: Dapto, NSW
🏠 Design: 2 Bedroom Self-Contained Granny Flat (58m²)
💰 Build cost: $260,000 turn key
⏱️ Timeline: Consultants | 2 weeks | CDC approval 30 business days | Construction 12 weeks
💵 Weekly rental income: $600/week
📈 Annual gross rental income: $31,200
The Situation
Mark and Julie had owned a 4-bedroom brick veneer home in Dapto for seven years. Originally purchased as their family home, the property had become an investment when they upsized — but it was costing them $580 per week in negative gearing after mortgage repayments, rates, insurance, and management fees.
With interest rates having risen significantly over the preceding two years, the cashflow pressure had become real. They were considering selling — but didn’t want to exit a market they believed in long-term.
A colleague mentioned granny flats. Mark did his research, found Granny Flats Illawarra, and booked a free site inspection.
Thirroul Family Home — Keeping the Family Close
📍 Location: Thirroul, NSW
🏠 Design: 2 Bedroom Self-Contained Granny Flat (58m²)
💰 Build cost: $260,000 turn key
⏱️ Timeline: Consultants | 2 weeks | CDC approval 28 business days | Construction 12 weeks
👨👩👧 Purpose: Accommodation for ageing parent
The Situation
Sarah and David had been worrying about David’s mother, Patricia, for over a year. Patricia was 74, still independent and sharp, but living alone in a unit in Wollongong — 35 minutes away. After a minor health scare, the family agreed that having Patricia closer would give everyone peace of mind.
The options they considered were: Patricia moving into the main house (no — she valued her independence too much), buying or renting a nearby property (expensive and impractical), or building a granny flat on their Thirroul property.
The Thirroul block was generous — 720m² — with a north-facing rear yard and good access from a side lane. Sarah found Granny Flats Illawarra online and booked a site inspection.
What Our Clients Say
Don't Just Take Our Word For It
Hear from Illawarra families who trusted Granny Flats Illawara with their granny flat project.
Julie Strokes
PositionJosh Alcorn from Jaya Projects recently completed work at my Kiama home. His work standards aremeticulous and professional, with all work compliant with relevant building standards.Josh is personable, offers good advice and is impressively punctual - in fact, he even texted me toadvise that he would be 5 minutes later than originally notified. This shows a tradie who cares about hisclient's needs and expectations.I have no hesitation in recommending Josh for any building or carpentry needs.
David Hartas
PositionI used Josh and the team for a renovation to a detached room we had in our backyard. Josh camearound to inspect the job and shortly after provided a detailed quote for what our vision was. He wasable to answer any questions I had about the cost and went through, in detail, what the finished productwould look like and timeframe it would take to complete. Fast forward to the completion, and the costwas identical to the quote and the project was finished on time and to an extremely high standard.Throughout the construction process Josh and his team were reliable, respectful and trustworthy anddelivered a result well beyond our expectations.I have, and will continue to recommend the Jaya team to anyone looking to renovate or build.
Dylan Goncalves
PositionMost professional and most outstanding work done by Josh and his team would highly recommend forany of your projects or renovations.
Dave
PositionJosh and his team did a terrific job on our project. It was a complex job but Josh used his many skills to get the job done, and get it done well. He and his team were always on time, he kept us informed and were incredibly nice to deal with. We can't recommend him more highly.
Riley
PositionHad a great experience with Josh and the team at Jaya. From start to finish everything was well organised and easy. Communication was clear the whole way through and Josh really knew what he was doing. The quality of the work was unreal and the final result was better than expected. Would 100% recommend them to anyone in the future.
Fast, transparent, and tailored to Illawarra investors.
Frequently Asked Questions
Everything you need to know about building a granny flat in the Illawarra.
What is a granny flat?
A granny flat (also called a secondary dwelling or second dwelling) is a self-contained residential unit built on the same lot as an existing house. In NSW, granny flats can be attached to or detached from the main dwelling and can be up to 60m² in size. They must have their own kitchen, bathroom, and living space to qualify as self-contained.
What is a CDC and why is it better than a DA?
A Complying Development Certificate (CDC) is a fast-track planning approval pathway under NSW State legislation. Unlike a council Development Application (DA) — which can take 3 to 6 months and has an uncertain outcome — a CDC is processed by a private accredited certifier and typically takes around 30 days once lodged. We specialise exclusively in CDC approvals, which is why our projects move faster.
Does my block qualify for a granny flat?
In NSW, your property generally needs to meet these minimum requirements for a CDC-approved granny flat: a lot size of at least 450m², a minimum width of 12 metres at the building line, and must be in a residential zone. The best way to confirm is a free site inspection — call (02) 4203 3554 and we’ll assess your block at no cost.
How long does it take to build a granny flat?
From the point of engaging us, the typical timeline is: CDC approval — approximately 20 business days, followed by construction — approximately 10 to 14 weeks. Our fixed-design approach and systemised build process keeps timelines predictable. Most of our clients are collecting rent within 5 to 6 months of first contact.
How much does a granny flat cost in the Illawarra?
Granny flat costs in the Illawarra typically range from $220,000 to $300,000 depending on size, design, and site conditions. Our fixed-design model removes the cost uncertainty of custom builds — you’ll know what you’re up for before you commit to construction. Contact us for a clear cost overview based on your specific property.
Granny Flats Illawarra
Expert Granny Flat Builders for Wollongong & the Illawarra
WE MAKE IT SIMPLE. We design and build fixed-design, CDC-approved granny flats for property owners across Wollongong, Shellharbour, Kiama, Dapto, and the entire Illawarra region. Our pre-engineered designs are purpose-built to pass CDC approval quickly, fit most suburban blocks, and deliver strong rental returns — without the delays, cost blowouts, or headaches of a traditional custom build.
Whether you’re an investor looking to flip negative gearing into positive cashflow, a family wanting to house parents or adult children, or a homeowner who simply wants to unlock your property’s full potential — we’re the local granny flat builders in the Illawarra who can make it happen.
Latest Blog Posts
We share insights, inspiration, and practical advice to help in your granny flat journey
At Granny Flats Illawarra, we’re passionate about creating modern, functional, and beautifully designed living spaces that suit every lifestyle. Whether you’re looking to add value to your property, provide a comfortable home for family, or explore smart investment opportunities, our team brings expertise and craftsmanship to every project.
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