Home Extensions Kogarah
If you’re looking for home extensions Kogarah homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Kogarah, Rockdale, Carlton and all neighbouring suburbs across the St George area.
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🔥 June Special! Free site inspection + council feasibility check included. Limited to 3 jobs this month. Call 1300 098 730
IS YOUR HOME READY FOR AN EXTENSION?
Monstructions specialises in home extensions Kogarah, expertly designing and building additions that suit the homes and families throughout the St George area. We’re proud to serve homeowners throughout Kogarah, Carlton and Hurstville with our licensed team managing everything from initial design through to final handover.
Home Extensions Kogarah
Built For The Way You Live
Kogarah is filled with post war brick homes and federation weatherboard cottages, mostly built between the 1920s and 1960s on medium sized blocks around 550 to 650 square metres. Many original floor plans have small bedrooms, dated kitchens and only one bathroom, making extensions the practical choice for growing families who want to stay in the area. With such solid foundations, these homes are perfect candidates for rear additions or second storey work.
We’ve completed dozens of extensions throughout Kogarah and nearby suburbs like Rockdale, Carlton and Bexley, working with everything from original federation homes to mid century brick builds. Our team understands the local housing stock and knows how to design additions that respect the original character while creating modern, functional living spaces. Every project gets the same attention whether it’s a single storey rear extension or a complete upper level addition.
Kogarah’s proximity to the CBD, train station and schools makes it popular with young families who need more space but don’t want to leave the area. Property values have climbed steadily over the past decade, and a well designed extension typically adds more value than the build cost. Rather than moving and paying stamp duty, most homeowners find extending their existing Kogarah home makes better financial sense while keeping the kids in local schools.
Our Home Extension Services
Whether you need a single room addition or a full second storey, our licensed team delivers quality extensions on time and within budget.
Ground Floor Extensions
Expand your living space with a ground floor addition tailored to your block and lifestyle.
Second Storey Additions
Add a full second storey to your home and double your living space without moving.
Rear & Side Extensions
Maximise your block with a rear or side extension designed to suit your existing home.
DA & CDC Approval Managed
We handle the full council approval process so you don’t have to deal with the paperwork.
Benefits of a Home Extension
Extending your home is one of the best investments you can make as a Sydney homeowner.
Significant Property Value Increase
A well-built extension adds substantial value to your property at resale
Stay in Your Suburb
Extend instead of moving and keep the location, school zone and community you love
More Space for Your Family
Get the extra bedroom, living area or open plan space your family actually needs
Cheaper Than Buying
In most Sydney suburbs, extending costs far less than buying a larger home
Get Started with Monstructions Today!
Ready to extend your home and create the space your family needs? Contact us today for a free quote and let our home extension specialists bring your vision to life.
Our Extension Process
Initial Consultation
Free consultation to discuss your extension ideas, block constraints and budget.
Design and DA Approval
We design your extension and manage the full council approval process on your behalf.
Site Preparation
Full site preparation, structural work and foundation ready for building.
Construction
Licensed builders construct your extension to the highest standard with all trades managed.
Final Handover
Full inspection and walkthrough before handover to ensure everything is built to specification.
How Much Does a Home Extension Cost in Kogarah?
Every extension is different. Click the button below to hear back from us within 2 hours!
Single Room Addition
Smart upgrades that make a big impact.- Ground floor extension
- New bedroom, living or study
- Full council approval managed
- Licensed builder end to end
- Fixed price contract
- Tailored to your block and budget
Full Home Extension
Full transformation of your home footprint.- Multi-room ground floor addition
- Kitchen, living, bedroom combinations
- Full structural engineering
- Council DA approval managed
- Fixed price contract
- Tailored to your home and lifestyle
Second Storey Addition
Double your space without moving.- Complete second storey build
- Custom design and architecture
- Full structural and engineering
- Council DA approval managed
- All trades managed end to end
- Fixed price contract
- Fully customised to your vision
Why Kogarah Homeowners Choose Us For Their Extension?
As home extension specialists across Sydney, we manage everything from design and approvals through to construction and handover.
10+ Years of Extension Experience
Our team has delivered ground floor extensions, second storeys and full home additions across Sydney.
We Manage the Full Process
From DA approval to final handover, we handle every step so you don’t have to.
Trusted by Sydney Homeowners
Homeowners across Sydney trust Monstructions to deliver their extension on time and to budget.
Licensed and Fully Insured
Every extension is built by licensed professionals with full insurance and a fixed price contract.
Don't Take Our Word For It
"I contacted Monstructions to get an idea of a price for doing an extension on my home. Of course I contacted many other people but they were the only ones who came back to me and assisted in giving me an idea of the price. I was so grateful. I wouldn't hesitate in recommending this company as we couldn't be more happy with the team, thank you for your help and support."
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Amanda
"We had a plan of what we wanted with our 2nd story + granny flat addition, but also had a budget to meet..the Monstructions team worked hard to make that happen for us. With a few little hiccups along the way from weather delays, the boys kept the job moving as smoothly as possible and the team were amazing in keeping mess to a minimum. Allowing us to stay at home during the reno. 100% highly recommended!"
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Angela
"Fantastic! Monstructions did an amazing job on my home extension, all the boys that worked on my house were professional and polite, and their quality of work was second to none. From drawings to completion it was a breeze working with them. They were easy to work with and extremely efficient and professional. Thank you for all the hard work and effort, I will recommend you to everyone I know."
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David
Products we use
FAQS
Got a question?
How much does a home extension cost in Kogarah?
A single room addition in Kogarah typically starts from $80,000, while a full ground floor extension with kitchen and living areas starts from $150,000. Second storey additions generally begin around $250,000 depending on size and finishes. We provide a detailed free quote after assessing your property and discussing your specific needs.
How long does a home extension take in Kogarah?
Most home extensions in Kogarah take between 3 to 6 months from council approval through to final handover, depending on the size and complexity of the work. The council approval process with Bayside Council typically adds another 8 to 12 weeks before construction starts. We’ll give you a realistic timeline during your initial consultation based on your specific project.
Do I need council approval for a home extension in Kogarah?
Most extensions in Kogarah require either a Development Application or Complying Development Certificate from Bayside Council. Very minor additions might qualify as exempt development, but anything adding significant floor space or a second storey will need formal approval. Our team manages the entire approval process including architectural plans, engineering and council submissions.
Can you add a second storey to a brick home?
Yes, most brick homes in Kogarah built from the 1950s onwards have foundations capable of supporting a second storey addition. We arrange a structural engineer to assess your existing foundations and design any required reinforcement work. The majority of brick homes in the area only need minimal structural upgrades to safely add an upper level.
Do you service Kogarah and surrounding suburbs?
Yes we service Kogarah and all surrounding suburbs. Call 1300 098 730 to discuss your project.
Monstructions provides home extensions across St George, including Hurstville Grove, Kogarah Bay and all surrounding suburbs.


