building & design tips

Take inspiration, tips and advice from our specialist design and building team

7 Steps to Building a Granny Flat

Building a granny flat

Want a little extra space or privacy in your new home?

With Montgomery Homes, you now have the option to add a granny flat to your backyard, creating additional room for visitors who want to stay overnight, teenagers who need their own space, or even a small area for older relatives like Nan and Pop to live.

During the planning process for your new home, our team will run through a wide range of inclusions and possible upgrades to make your new house feel like a home, including our brand new granny flats.

Curious about how to build a granny flat with Montgomery Homes? In this blog, we explain the building process from planning to handing over the keys to your new granny flat - read on.

1. Choosing a granny flat design

When you sit down with one of our building consultants to plan your level block home design, you will have the chance to choose your granny flat design, too.

We’ll make sure your new granny flat matches your new home’s decor and facade, and you can choose from a range of colours, materials, and internal finishes to ensure your granny flat is comfortable yet modern.

2. Laying the foundation

Once the land has been cleared, our construction team will then lay the foundation for your new granny flat.

Our builders and surveyors will mark the boundaries of where your granny flat will be built, then carry out any necessary excavation to ensure the building is stable. After that, we can pour the slab, laying the foundation of your new granny flat.

This is when things start to get real.

You can see the shape, layout and placement of your granny flat, so you can start planning where you’d like to have additional backyard ornaments like fountains and bird baths, new trees, gardens or veggie patches, or even a slippery dip for the kids. The opportunities are endless!

3. Building the frame

After laying the foundations, we will then build the frame - the bare bones of your granny flat. Made from industry standard, termite resistant timber, your granny flat will be set with internal and external bearings to improve stability.

You will now be able to see your granny flat come to life… and you can start daydreaming about decorating!

4. Adding the external brickwork

While our construction and sub-contracting team is building your brand new home, we will also start sealing your new granny flat with brickwork, cladding and moroka, depending on the finishes you have selected.

Next the roofing and guttering is installed so it is also sealed from the top and the internal areas are protected from the weather during the building process.

It’s all coming together now!

5. Setting up the interior (including the kitchen)

With the walls built and a roof over our heads, we can start working on the interior of your granny flat. Our local subcontractors will come in to install the essentials like plumbing and electrical for both your new home and your granny flat, ensuring the two are linked and working harmoniously.

We will also add the internal walls and reinforce them with R.20 insulation to keep inhabitants warm in the winter and cool in the summer.

If you’re planning on renting out your granny flat, you may want to talk to our team about adding a separate electrical box so you can determine how much power your renters are using, then allocate the utility bills as accurately as possible.

At this stage, we’ll also be looking to install the kitchen and bathroom of your granny flat. This includes kitchen and bathroom vanities, cupboards and storage, key fittings like the stove, shower, shower screens, and vanities.

Granny Flat Bathroom Design

6. Adding flooring, paintwork, and the internal finishes

We’re getting close to the end of your build, so the next step is to fit-out and bring the rest of your granny flat to life.

At lock up stage, all the tiles and flooring will be installed, the walls will be painted as per your colour preferences, any additional accessories will be installed, and your remaining fittings will be installed

7. Moving in!

After our sub-contractors have cleaned up the site, both your new home and granny flat will be independently inspected to ensure everything is in accordance with the Building Code and the relevant Australian Standards. From here, all appliances will be tested and the time has now come for you to move into your new home and of course, your granny flat!

We’ll complete a thorough walk-through with you to demonstrate how the appliances operate and to ensure everything meets your expectations.

Extend your new family home with a modern granny flat in your backyard

Whether your teenager needs some space, you’re thinking of leasing the area, or have elderly relatives needing care, a granny flat is the perfect solution to expand your home and create a quiet, cosy space in your backyard.

Talk to our consultants about building a granny flat alongside your new home today or explore our wide range of granny flat designs here. The opportunities are endless with Montgomery Homes.

Similar Blogs

All Articles
  • All Articles
  • Blog
  • Building Process
  • Featured
  • Finance Tips
  • Home Designs
  • Inspiration Gallery Blog
  • News & Events
  • Selections Gallery
  • Selections Gallery Blog
  • Styling & Inspiration
  • Sustainable Living

New Airlie 2 245 Display Home at Cameron Grove Estate

Step inside the stunning Airlie 2 245 at Cameron Park! Designed by Shaynna Blaze, this home offers 5-star resort luxury with a timeless Hamptons facade. Visit us today!
Read in full

3 Must-See Display Homes On The Central Coast

We’ve built three beautiful display homes featuring all the essential elements you need for Central Coast living, including luxe, coastal-themed interior designs and open-plan living.
Read in full
display home facade

First-Time Buyer Homes In Our Emerge Collection

Our brand-new Emerge Collection features 20+ first-home buyer homes, complete with stunning inclusions and interior design themes! Here, we share all the new and classic Montgomery Homes in the collection — explore online now.
Read in full
Carolina 2 281 sunroom

Coastal Living City-Side: Visit Our Carolina 2 281 Display

Looking to elevate your coastal lifestyle, without straying too far from the Sydney CBD? Our Carolina 2 281 display home in Miranda showcases the quintessential “beachy” lifestyle, with all the must-have conveniences needed by modern homeowners. Learn more.
Read in full
display homes in Lochinvar

Two Beautiful New Display Homes at Hereford Hill

The Montgomery Homes team is excited to announce two beautiful new display homes at Hereford Hill in Lochinvar — the Airlie 222 and Avalon 2 249, styled by interior designer Shaynna Blaze! Learn more about these designs and visit us at Hereford Hill from Friday to Monday.
Read in full
large acreage home

6 Amazing Advantages of Acreage Life

Who doesn’t want a little more space for their next home? Whether you’re looking for a secluded life or you want to build the spacious home of your dreams, take a look at these advantages of living on an acreage in this blog. Read on!
Read in full
Whitehaven 238 At HomeWorld Box Hill

3 Ways To Add Space To Your New Home

As your family grows, you may be looking for ways to maximise space in your new home build. In this article, we share three tips to make the most of every space in your beautiful new home. Read on!
Read in full
Award-winning Whitehaven 264 display home

Montgomery Homes Has Won 3 HIA Awards in 2022

We’re thrilled to announce that we’ve won THREE HIA Display Home of the Year Awards in 2022! We’ve been recognised for creating beautiful floor plans that balance style and functionality while working with the land's unique characteristics, like challenging, complex slopes. Discover our three award-winning display homes and take a tour today!
Read in full
backyard granny flat

5 Of Our Stunning Granny Flat Designs in Sydney

Looking to add a granny flat to your new build? We’ve got you covered! Check out five of our stunning granny flat designs, with chic, modern layouts perfect for sloping sites, long blocks and narrow blocks. Discover your dream flat today — read on!
Read in full

Join our newsletter to receive our latest promotions,
news and helpful building and design tips