Granny Flat Builders St George
Monstructions specialises in granny flats St George, building quality secondary dwellings for homeowners across this thriving inner south Sydney region. Our licensed team proudly serves nearby suburbs including Hurstville, Kogarah and Rockdale, handling everything from DA approval through to handover.
10+ years experience guarantee
10 years guarantee
100% customer satisfaction
Get A Free Quote Now!
🔥 June Special! Free site inspection + council feasibility check included. Limited to 3 jobs this month. Call 1300 098 730
IS YOUR PROPERTY READY FOR A GRANNY FLAT?
Monstructions specialises in building granny flats across St George’s established family homes, delivering quality secondary dwellings that suit the generous block sizes and family oriented character of this inner south region. We’re proud to serve homeowners throughout St George and nearby suburbs including Hurstville and Kogarah, with our licensed team handling everything from DA approval through to handover.
Fully licensed bonded general contracting
Quality Workmanship
Over a decade of renovation and building experience across Sydney
St George Granny Flats Built Around Your Property
St George features predominantly established family homes built from the 1950s through to the 1980s, sitting on generous blocks that typically range from 550 to 700 square metres. These spacious properties offer excellent side or rear access, making them ideal candidates for granny flat additions that complement the existing family home layout.
We service homeowners throughout Hurstville, Kogarah, Rockdale, Beverley Hills, Kingsgrove and Penshurst with expert granny flat construction tailored to local council requirements. Our team brings extensive knowledge of Georges River and Bayside Council DA processes, delivering one and two bedroom designs that maximise the potential of St George’s established residential blocks.
The St George property market benefits from strong rental demand driven by excellent transport links to the CBD and proximity to hospitals, universities and commercial centres. Granny flats in this area command weekly rents between $450 and $600, making them a smart investment for homeowners seeking additional income or multigenerational living options.
Our Granny Flat Services
Whether you’re adding a studio for rental income or a full 2 bedroom dwelling for family, our licensed team delivers quality granny flats across Sydney.
Detached Granny Flat
A fully self-contained dwelling separate from your main home.
Attached Granny Flat
Built onto your existing home, sharing one wall.
Studio Granny Flat
A compact, cost-effective single-room secondary dwelling.
2 Bedroom Granny Flat
Spacious secondary dwelling perfect for family or rental income.
Garage Conversion
Transform your existing garage into a fully liveable granny flat.
Council Compliant Builds
We handle all DA approvals and council paperwork for you.
Benefits of Granny Flats
Investing in a granny flat is one of the smartest decisions you can make as a homeowner.
Increased Property Value
Adds $150,000+ to your home’s value
Generate Rental Income
Earn $400-$600+/week from a quality granny flat
House Family
Keep loved ones close with their own private space
Fast DA Approval
We handle all council paperwork for you
Get Started with Monstructions Today!
Are you ready to transform your land into a beautiful and functional space? Contact us today for a free quote and let our granny flat experts bring your vision to life. Experience the quality and dedication that set us apart from the rest.
Our Renovation Process
Initial Consultation
We start with a free consultation to discuss your ideas and requirements. Our team will guide you through the design possibilities, ensuring your vision is captured.
Design & DA Approval
We design your granny flat and manage the full council approval process.
Construction
Our licensed team builds your granny flat to the highest standard.
Final Inspection
Thorough inspection before handover to ensure everything is perfect.
How Much Does a Granny Flat Cost in St George?
Every granny flat is different. Click the button below to hear back from us within 2 hours!
Studio Granny Flat
Everything you need in a compact, smart design.- Single open-plan living space
- Kitchenette
- Bathroom
- Fully self-contained
- Council compliant
- Fixed price contract
- Tailored to your budget
1 Bedroom Granny Flat
One bedroom design for rental income or family.- Separate bedroom
- Full kitchen
- Full bathroom
- Living area
- Council compliant
- Fixed price contract
- Tailored to your style & needs
2 Bedroom Granny Flat
Two bedrooms for maximum space and rental return.- Two separate bedrooms
- Full kitchen
- Full bathroom
- Living area
- Council compliant
- Fixed price contract
- Fully customised to your vision
Why St George Homeowners Choose us?
As leading granny flat builders in Sydney, we pride ourselves on our commitment to quality and customer satisfaction. We make building simple, stress-free and done right the first time.
10+ Years of Building Experience
Our team has delivered hundreds of successful builds across Sydney; on time and within budget.
On Time, On Budget
We keep you informed at every step and never surprise you with hidden costs.
Trusted by Sydney Homeowners
From Sutherland Shire to the North Shore, homeowners trust us to deliver.
Licensed and Fully Insured
Every job is handled by licensed professionals. You get quality workmanship backed by full insurance.
Don't Take Our Word For It
"It took me a couple of months of research before choosing Monstructions. They have been nothing but amazing. They were extremely helpful throughout the process, made great suggestions to help me overcome some obstacles, assisted with any changes I wanted made to the flat and was very quick with responses. They took care of all the permits and made it was very easy and smooth process. Quality finish and craftsmanship. I'm so happy and I would highly recommend them to everyone. Thank you to the team for completing the flat in a matter of months, thank you for giving me a beautiful space I can call home. I absolutely love it."
Joanne T.
"We recently received handover of our granny flat and we all couldn't be happier! From the initial meetings about design and budget right through to completion, everyone has been an absolute pleasure to deal with. The project was delivered early, on budget and the finishes are immaculate. My mum is thrilled to move into her house, we highly recommend Monstructions to anyone looking to build a granny flat!"
Kimberly R.
"We found our experience with Monstructions to be excellent, from start to finish. Communication lines always open, clear and organised, delivered on everything they said they would in a timely fashion. The quality of workmanship is outstanding, and the final result exceeded our expectations. Our new space is not only beautifully designed but also incredibly functional. Thank you for making this such a positive experience!"
Chris C.
Products we use
FAQS
Got a question?
How much does a granny flat cost in St George?
Granny flat costs in St George typically start from $120,000 for a studio, $150,000 for a 1 bedroom and from $180,000 for a 2 bedroom. The final cost depends on size, finishes, site conditions and council requirements. We provide a free detailed quote so you know exactly what you’re up for before committing.
Do I need council approval for a granny flat in St George?
Yes. In NSW most granny flats require a Development Application (DA) or Complying Development Certificate (CDC). We handle the entire approval process for you so you don’t need to deal with council at all.
How long does it take to build a granny flat in St George?
From DA approval to handover, most granny flats take 12–20 weeks. The approval process typically takes 4–8 weeks and construction 8–12 weeks. We provide a clear timeline before work begins.
What size granny flat can I build in St George?
In NSW a granny flat can be up to 60sqm of floor space. Your block must be at least 450sqm. We assess your property during the free consultation and advise exactly what you can build.
What areas of Sydney do you service?
We service all of Sydney including Sutherland Shire, St George, Inner West, Eastern Suburbs, Western Sydney, Northern Beaches and North Shore.
Suburbs We Service in St George
Click your area to learn more