Home Extensions Killarney Heights
If you’re looking for home extensions Killarney Heights homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Killarney Heights, Davidson, Forestville and all neighbouring suburbs across the Northern Beaches 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 Killarney Heights, expertly designing and building additions that suit the homes and families throughout the Northern Beaches area. We’re proud to serve homeowners throughout Killarney Heights, Frenchs Forest and Belrose 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 Killarney Heights
Built For The Way You Live
Killarney Heights is dominated by single storey brick homes built through the 1960s and 1970s on reasonably sized blocks, typically between 550 and 700 square metres. These homes were built for a different era and many families now need extra living space, a proper home office, or another bedroom and bathroom. Extending your existing home often makes far better financial sense than selling and buying elsewhere, especially given the strong local schools and established community here.
We’ve completed dozens of extensions in Killarney Heights and right across the Forest District, from single storey rear additions to full second storey builds. Many of the homes here share similar floor plans, which means we understand exactly how to maximise your space and work within the building envelope. Our team knows the local council requirements and we manage the entire process from concept design through to construction and final inspection.
Families stay in Killarney Heights for the schools, the parks, and the quiet leafy streets within easy reach of everything. With median house prices continuing to climb across the Northern Beaches, adding a quality extension is one of the smartest investments you can make. A well designed addition can add $200,000 or more to your property value while giving you the space your family actually needs right now.
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 Killarney Heights?
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 Killarney Heights 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 Killarney Heights?
A single room addition typically starts from $80,000, while a full ground floor extension usually ranges from $150,000 depending on size and finishes. A second storey addition generally starts from $250,000 including structural work, stairs and all new rooms. We provide a detailed fixed price quote after an initial consultation and design process so you know exactly what to expect.
How long does a home extension take in Killarney Heights?
Most extensions take between three to six months from council approval through to final handover, depending on the size and complexity of your project. The council approval process itself usually takes another eight to twelve weeks. We provide a clear timeline during the quoting process and keep you updated throughout every stage of construction.
Do I need council approval for a home extension in Killarney Heights?
Most home extensions in Killarney Heights require either Development Approval or a Complying Development Certificate from Northern Beaches Council. Some minor additions may qualify for exempt development but this depends on size, setbacks and other planning controls. We handle the entire approval process for you including all architectural drawings, engineering reports and council submissions.
Can I add a second storey to my Killarney Heights home?
Yes, most single storey homes in Killarney Heights are suitable for a second storey addition, though you’ll need structural engineering and council approval. The predominantly brick construction from the 1960s and 1970s often requires foundation work and additional structural support. We arrange all engineering assessments and design the addition to complement your existing home while meeting current building codes and height restrictions.
Do you service Killarney Heights and surrounding suburbs?
Yes we service Killarney Heights and all surrounding suburbs. Call 1300 098 730 to discuss your project.
Monstructions provides home extensions across Northern Beaches, including Ingleside, Lovett Bay and all surrounding suburbs.