Home Extensions Baulkham Hills
If you’re looking for home extensions Baulkham Hills homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Baulkham Hills, Castle Hill, Bella Vista 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 Baulkham Hills, expertly designing and building additions that suit the homes and families throughout the Hills, Parramatta & Penrith area. We’re proud to serve homeowners throughout Baulkham Hills, Castle Hill 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 Baulkham Hills
Built For The Way You Live
Baulkham Hills is packed with family homes built from the 1970s through to the early 2000s, sitting on decent sized blocks that typically range from 550 to 800 square metres. Many of these homes were built with basic three or four bedroom layouts that no longer suit how families live today. Rather than moving and paying stamp duty, most homeowners find extending their existing home makes far better financial sense.
We’ve completed extensions right across Baulkham Hills and neighbouring suburbs like Bella Vista, Kellyville and Winston Hills. Our team knows the local housing stock inside out, from the brick veneer homes around Old Northern Road to the split level designs common throughout the suburb. We handle everything from single storey rear extensions to full second storey additions that transform how your home works.
With Baulkham Hills median house prices sitting well over $1.8 million, adding a well designed extension is one of the smartest investments you can make. Families are choosing to stay put and extend rather than upsize, especially with good schools, Stockland Mall and easy M2 access right here. A quality extension not only gives you the space you need but adds serious value when it comes time to sell.
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 Baulkham Hills?
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 Baulkham Hills 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 Baulkham Hills?
A single room addition typically starts from around $80,000, while a full ground floor extension usually begins at $150,000 depending on size and finishes. Second storey additions generally start from $250,000 and up. We provide a free, no obligation quote specific to your home and what you’re looking to achieve.
How long does a home extension take in Baulkham Hills?
Most extensions take between 3 to 6 months from council approval through to final handover, depending on the scope and complexity of the build. We’ll give you a clear timeline during the quoting process. Weather, material availability and any unforeseen issues can sometimes affect this, but we keep you informed every step of the way.
Do I need council approval for a home extension in Baulkham Hills?
Most home extensions in Baulkham Hills require either a Development Application or Complying Development Certificate from The Hills Shire Council. Some smaller alterations may fall under exempt development, but it depends on your specific plans and property. We manage the entire approval process for you, from preparing documentation to lodging with council and responding to any queries.
Can I add a second storey to my Baulkham Hills home?
Absolutely. Many of the older single storey homes in Baulkham Hills are perfectly suited to second storey additions. We assess your existing structure to ensure it can support the additional load, and if any strengthening is needed, we factor that into the design and quote from the start.
Do you service Baulkham Hills and surrounding suburbs?
Yes we service Baulkham Hills and all surrounding suburbs. Call 1300 098 730 to discuss your project.
Monstructions provides home extensions across Hills, Parramatta & Penrith, including Arcadia, Beaumont Hills and all surrounding suburbs.