Custom Granny Flat Builders in Newcastle & Lake Macquarie
Build Custom Granny Flats in Newcastle & Lake Macquarie
Looking to build high-quality granny flats in Newcastle? Extrabuild specialises in custom granny flat design and construction across Newcastle and Lake Macquarie.
From concept planning and council approvals through to construction and handover, our experienced team manages the entire process to deliver a seamless, stress-free build.

Trusted Granny Flat Builders in Newcastle
As a family-owned building company with over 30 years of experience, we’ve helped local families design and build custom granny flats across Newcastle and Lake Macquarie.
Our structured systems streamline the entire process from design and approvals to construction, ensuring you’re informed and confident at every stage.
We maintain focus on:
- Your budget
- Clear timeframes
- Quality workmanship
- NSW compliance requirements
If you’re comparing granny flat builders in Newcastle, we welcome you to view our recent projects in our Project Gallery.
Custom Granny Flats Designed for Newcastle Properties
Every Newcastle backyard is different. Whether your block is sloping, narrow or uniquely shaped, we design granny flats that maximise space while meeting NSW regulations.
Our granny flats are ideal for:
- Rental investment opportunities
- Multi-generational living
- Guest accommodation
- Downsizing without leaving your property
We tailor each design to complement your existing home while ensuring practical, comfortable and stylish living.
Clear Timeframes & Structured Build Process
We provide realistic build timelines and proactive communication to ensure your project runs smoothly.
Our process includes:
- Free site inspection in Newcastle or Lake Macquarie
- Concept design and drafting
- CDC or DA approvals
- Selections and inclusions planning
- Construction and final handover
To better understand what to expect at each stage, you can learn more about how we manage the building process.
Recent Granny Flats Built in Newcastle
View a selection of completed granny flats across Newcastle and Lake Macquarie. From compact 1-bedroom layouts to spacious 2-bedroom designs, our projects showcase quality finishes, thoughtful layouts and seamless integration with existing homes.
For more builds, visit our Project Gallery
Comfortable, Stylish & Affordable Granny Flats in Newcastle
Free consultation & site inspection
Over 30 years building experience
Fully managed design & approvals
Local Newcastle building expertise
How Much Does a Granny Flat Cost in Newcastle?
The cost of building a granny flat in Newcastle varies depending on:
- Size (up to 60m² under NSW regulations)
- Site access and preparation
- Sloping or challenging blocks
- Level of customisation
- Inclusions and finishes
We provide transparent pricing and detailed quotes following your free site inspection. Our goal is to help you make informed decisions while maintaining control over your budget.
For tailored pricing, contact our team today.
Newcastle Granny Flat Regulations & Approvals
Granny flats in NSW must comply with state planning guidelines, including:
- Maximum floor area of 60m²
- Minimum lot size of 450m²
- Setback requirements
- Only one granny flat per property
Most builds fall under CDC (Complying Development Certificate), but some may require DA approval depending on site conditions.
For more answers, visit our FAQs to learn more.
Hear Kevin and Kristine’s Granny Flat Experience in Newcastle
It was a pleasure working with Kevin and Kristine to build the perfect granny flat for their backyard in Coal Point.
Start Your Granny Flat Project in Newcastle Today
At Extrabuild, we are committed to ensuring your building journey is as stress-free as possible.
Frequently Asked Questions About Granny Flats in Newcastle
We build granny flats throughout Newcastle and Lake Macquarie, including Cardiff, Mayfield, Toronto, Belmont and surrounding suburbs.
Yes. We assess site conditions during your free consultation.
The minimum block size required is 450m².
Yes, the Extrabuild team is equipped to handle any demolition needed before your granny flat build. We also have relationships with local Newcastle businesses whom we can recommend to assist with landscaping.
The NSW Affordable Rental Housing SEPP states that there can only be ONE granny flat per property.
The NSW Affordable Rental Housing SEPP states that a property’s entire block size must be a minimum of 450m² to build a granny flat.
Yes. Granny flats can be attached or detached. If within 900mm of the primary dwelling, it is considered attached.
Under NSW regulations, a granny flat can be up to 60m².
Your question wasn’t answered? Contact our team and we’ll be happy to assist.
What Our Newcastle Clients Say
We’re proud to have completed granny flats and building projects across Newcastle and Lake Macquarie, delivering quality workmanship and exceptional communication.
We totally appreciate and love the work.