Home Extensions Double Bay
If you’re looking for home extensions Double Bay homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Double Bay, Bellevue Hill, Rose Bay and all neighbouring suburbs across the Eastern Suburbs 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 Double Bay, expertly designing and building additions that suit the homes and families throughout the Eastern Suburbs area. We’re proud to serve homeowners throughout Double Bay, Edgecliff and Point Piper 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 Double Bay
Built For The Way You Live
Double Bay features a mix of 1920s and 1930s California bungalows, Federation homes and post war apartments on smaller blocks that typically range from 400 to 600 square metres. Many original homes have modest footprints with limited living space by today’s standards. An extension is often the smartest way to gain the space you need without leaving this tightly held suburb.
We’ve completed extensions throughout Double Bay and the surrounding Eastern Suburbs, working with the local housing character and strict council requirements. Our projects range from single storey rear additions to full second storey builds that maximise harbour glimpses and natural light. Each extension is designed around how your family actually lives, not cookie cutter plans.
With median house prices well over $5 million, moving up in Double Bay is expensive and often unnecessary. A well designed extension can add substantial value while keeping you in the suburb, close to Edgecliff station, the village shops and top schools. Most families find extending their current home delivers exactly what they need at a fraction of the cost of buying something bigger.
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 Double Bay?
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 Double Bay 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 Double Bay?
A single room addition typically starts from $80,000, a full ground floor extension from $150,000, and a second storey addition from $250,000 depending on size and finishes. We provide a free, detailed quote after assessing your home and discussing what you want to achieve. Every project is different, so we price accurately based on your specific needs and site conditions.
How long does a home extension take in Double Bay?
Most home extensions take between three to six months from Development Application approval through to final handover, depending on the scope of work. The DA process itself typically adds another two to three months. We provide a clear timeline upfront and keep you informed at every stage so there are no surprises.
Do I need council approval for a home extension in Double Bay?
Most extensions in Double Bay require either a Development Application or Complying Development Certificate through Woollahra Council. The approval pathway depends on your home’s zoning, heritage status and the size of your proposed extension. We manage the full approval process on your behalf, working with experienced designers who understand local council requirements.
Can you extend a California bungalow in Double Bay?
Absolutely, we regularly extend California bungalows throughout Double Bay and the Eastern Suburbs. These homes respond well to sympathetic rear additions or carefully designed second storey builds that respect the original street character. The key is working with the existing roofline and proportions while creating modern, light filled living spaces at the back.
Do you service Double Bay and surrounding suburbs?
Yes we service Double Bay and all surrounding suburbs. Call 1300 098 730 to discuss your project.
Monstructions provides home extensions across Eastern Suburbs, including Darling Point, Dover Heights and all surrounding suburbs.