Home Extensions Oatley

If you’re looking for home extensions Oatley homeowners trust, you’ve found the right team. Monstructions handles everything from initial design through to final handover, proudly serving Oatley, Hurstville, Penshurst and all neighbouring suburbs across the St George 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 Oatley, expertly designing and building additions that suit the homes and families throughout the St George area. We’re proud to serve homeowners throughout Oatley, Mortdale, Peakhurst 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 Oatley
Built For The Way You Live

Oatley is filled with post war fibro and brick homes from the 1950s and 60s, built on generous blocks that back onto bushland or slope down towards the Georges River. These original homes typically sit on 550 to 700 square metre blocks with good setbacks and rear yard space. Most families find the original two or three bedroom layout too tight for modern living, making extensions the smart choice over moving.

We’ve completed dozens of extensions throughout Oatley and neighbouring suburbs like Mortdale and Peakhurst, adding everything from single storey rear additions to full second storey builds. The sloping blocks common in streets near Oatley Park often allow for clever split level designs that maximise space without overwhelming the streetscape. Our team knows the local council requirements and how to work with the bushfire prone land designations that affect parts of the suburb.

Families love Oatley for the schools, the bush walking tracks and the strong community feel, so most would rather extend than leave. With median house prices sitting around $1.8 million, a well planned extension at $200,000 to $300,000 makes far more financial sense than selling and buying bigger elsewhere. The right addition can transform an outdated three bedroom cottage into a four bedroom family home that suits how people actually live today.

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 Oatley?

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

Why Oatley 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

Hurstville

"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

Peakhurst

"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

Ramsgate

Products we use

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FAQS

Got a question?

How much does a home extension cost in Oatley?

A single room addition in Oatley typically starts from $80,000, while a full ground floor extension begins around $150,000. Second storey additions usually start from $250,000 depending on size and finishes. We provide a free detailed quote after assessing your property and discussing your needs.

How long does a home extension take in Oatley?

Most home extensions in Oatley take between 3 to 6 months from council approval through to final handover. The timeline depends on the scope of work, weather conditions and any site specific challenges like sloping blocks. We provide a clear construction schedule before starting any work.

Do I need council approval for a home extension in Oatley?

Most home extensions in Oatley require either a Development Application or Complying Development Certificate from Georges River Council. Some properties fall within bushfire prone land zones which adds extra planning requirements. Our team manages the full approval process and knows exactly what council needs to see.

Can you extend on a sloping block in Oatley?

Absolutely. Many Oatley homes sit on sloping blocks, especially in streets that run down towards the river or parkland. We regularly design split level extensions that work with the natural fall of the land, often creating additional living space underneath or clever deck areas that take advantage of the views.

Do you service Oatley and surrounding suburbs?

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

Monstructions provides home extensions across St George, including Mortdale, Peakhurst and all surrounding suburbs.