Home Extensions Allambie Heights

If you’re looking for home extensions Allambie Heights homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Allambie Heights, Forestville, Frenchs Forest and all neighbouring suburbs across the Northern Beaches area.

10+ years experience guarantee

10 years guarantee

100% customer satisfaction

Get A Free Quote Now!

🔥 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 Allambie Heights, expertly designing and building additions that suit the homes and families throughout the Northern Beaches area. We’re proud to serve homeowners throughout Allambie Heights, Beacon Hill, Killarney Heights 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 Allambie Heights
Built For The Way You Live

Allambie Heights is dominated by brick and tile homes built through the 1960s and 1970s, sitting on generous blocks that often slope away from the street. Many original floor plans feature smaller living areas and dated kitchen layouts that no longer work for modern family life. The good news is these solid homes on decent sized blocks are perfect candidates for extension, whether you’re adding a second storey to capture district views or pushing out the back to create proper open plan living.

We’ve completed dozens of extensions across Allambie Heights and neighbouring suburbs like Forestville and Beacon Hill, working with the unique challenges these elevated blocks present. Our team understands the local building patterns, from managing sloping sites to working around established gardens that homeowners want to keep. Every project is managed by our licensed builders who live and work across the Northern Beaches.

Families love Allambie Heights for the schools, the space and the community feel, but moving up in the area means paying today’s prices for similar aged homes. A well planned extension lets you stay in the neighbourhood you know, add the space your family needs, and typically costs far less than selling and buying elsewhere. Properties that have been thoughtfully extended consistently outperform original condition homes 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 Allambie Heights?

Every extension is different. Click the button below to hear back from us within 2 hours!

Why Allambie 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."

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Amanda

Manly

"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

Dee Why

"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

Narrabeen

Products we use

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FAQS

Got a question?

How much does a home extension cost in Allambie Heights?

A single room addition typically starts from $80,000, while a full ground floor extension begins around $150,000 depending on finishes and complexity. Second storey additions generally start from $250,000 including structural work and access. We provide a detailed free quote after assessing your home and understanding exactly what you need.

How long does a home extension take in Allambie Heights?

Most home extensions take between 3 to 6 months from council approval through to final handover, depending on the size and complexity of your project. The approval process with Northern Beaches Council typically adds another 8 to 12 weeks before we start building. We’ll give you a clear timeline during the quoting process so you know exactly what to expect.

Do I need council approval for a home extension in Allambie Heights?

Most extensions in Allambie Heights require either a Development Application or Complying Development Certificate from Northern Beaches Council. The approval pathway depends on your property’s zoning, the size of your extension, and what’s already been built on the site. Our team manages the full approval process for you, working with certifiers and planners who know the local requirements inside out.

Can you extend on a sloping block in Allambie Heights?

Absolutely. Most blocks in Allambie Heights have some degree of slope, and we’ve built plenty of extensions that work with the natural fall of the land. Sloping sites actually create opportunities for undercroft storage, level access from different floors, or taking advantage of elevated positions for better views. Our design team will assess your block and show you the best options.

Do you service Allambie Heights and surrounding suburbs?

Yes we service Allambie Heights and all surrounding suburbs. Call 1300 098 730 to discuss your project.

Monstructions provides home extensions across Northern Beaches, including Wheeler Heights, Avalon Beach and all surrounding suburbs.