Home Extensions North St Marys
If you’re looking for home extensions North St Marys homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving North St Marys, Erskine Park, South Windsor and all neighbouring suburbs across the Hills, Parramatta & Penrith area.
10+ years experience guarantee
10 years guarantee
100% customer satisfaction
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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 North St Marys, expertly designing and building additions that suit the homes and families throughout the Hills, Parramatta & Penrith area. We’re proud to serve homeowners throughout North St Marys, Colyton, Mount Druitt and surrounds with our licensed team managing everything from initial design through to final handover.
Fully licensed general contracting
Quality Workmanship
Over a decade of renovation experience across Sydney
Home Extensions North St Marys
Built For The Way You Live
North St Marys is dominated by brick veneer homes built through the 1970s and 1980s on generous blocks, typically 600 to 800 square metres. Many properties sit on flat blocks with good side access, making them ideal candidates for extensions that add real family space. With solid bones and good block sizes, these homes respond well to renovations that bring them into line with modern family needs.
We’ve completed dozens of extensions across North St Marys and neighbouring suburbs like Erskine Park and Colyton, from simple back additions to full second storey builds. The majority of our work here involves extending single storey homes to create open plan living areas, extra bedrooms or dedicated home offices. Local families appreciate having a builder who understands the specific construction methods used in homes from this era.
With property prices remaining affordable compared to other parts of Sydney, many North St Marys homeowners choose to extend rather than move. A well planned extension can add $100,000 to $200,000 in value while giving you the home layout your family actually needs. The area’s established nature and proximity to schools, shops and transport make it worth investing in your property for the long term.
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 North St Marys?
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 North St Marys 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."
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!"
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."
David
Products we use
FAQS
Got a question?
How much does a home extension cost in North St Marys?
A single room addition typically starts from $80,000, while a full ground floor extension with open plan living starts from $150,000. Second storey additions begin around $250,000 depending on size and finishes. We provide a free quote after an onsite assessment of your property.
How long does a home extension take in North St Marys?
Most extensions take between 3 to 6 months from council approval through to final handover, depending on the scope and complexity. Single storey additions are generally quicker than second storey builds. We provide a detailed timeline as part of your quote.
Do I need council approval for a home extension in North St Marys?
Most extensions require either Development Application or Complying Development Certificate approval through Penrith Council. Some smaller additions may qualify for exempt development, but this depends on your specific circumstances. We manage the full approval process on your behalf and know the local planning requirements well.
Can you match the existing brick on my home?
Matching existing brickwork is something we do regularly on North St Marys homes. While exact matches can be challenging with older discontinued brick lines, we work with suppliers to find the closest match or can suggest design approaches that blend old and new. Our experience with 1970s and 1980s homes means we know what works best.
Do you service North St Marys and surrounding suburbs?
Yes we service North St Marys and all surrounding suburbs. Call 1300 098 730 to discuss your project.
Monstructions provides home extensions across Hills, Parramatta & Penrith, including Mulgoa, Orchard Hills and all surrounding suburbs.