1300 669 707

Mon - Fri : 10:00 AM to 7:00 PM

Looking to build a granny flat ?
Welcome to All Custom Granny Flats

The granny flats Sydney specialists, a home builder you can trust, licensed since 1987

Granny Flats Sydney – Granny Flat Builders – Custom Home Builder

Step one for granny Flats Sydney Planning

Design & Quote

The design process is the most crucial. As a licensed builder we are passionate and experienced in functional design. You can simply select from our plans or we can customize a design for you.

Granny Flats Sydney Approvals


We work with fully accredited certifiers to understand your design. We then prepare and lodge all applications and do all we can to get it approved. Read here for more on lodging an application.

Granny Flats Sydney Build Completion

Construction to Completion

Our experienced team will do it all for you with minimal disturbance. Your solution in your own backyard. Affordable and easy. Read here for more on the processes.

Do you have a difficult site ?
You're in good hands with
All Custom Granny Flats.

We individually assess each site and offer optimal solutions

Let us take care of the hassle with designs, approvals and construction. Difficult as may be, some sites can be quite challenging but rest assured we have the expertise to cover a wide range of site constraints that sets us apart from the rest.  Quite often a difficult site can present opportunities if carefully assessed by the right builder.

So let All Custom Granny Flats bring out the best in design and functionality with minimal disturbance and avoid all the headaches.

granny flats sydney construction
A recent 2.2m drop edge beam to support a challenging split level site

What We Do

We tailor design your granny flat to suit the space available. We work with the client and ensure all angles are covered.

Our standard inclusions are other builders extras so check here to see why our granny flats are built to last and proven to be maintenance free for years to come

Your Solutions in your Backyard, opportunities are endless, click here to find out more

GRANNY FLAT FACTS, unlock the full potential of your own backyard !


With the rising cost of housing in Sydney your back yard has become prime real estate. You could potentially be missing out on extra income as well as added value to your property.

The State government has made granny flats (secondary dwellings) in NSW easier and faster to build. Granny flats are now permitted in all residential zones across the state of NSW, subject to meeting the following requirements: ( see fact sheet )

•The development of a granny flat can only result in there being one principal dwelling and
one secondary dwelling on the site.

• The maximum size of the granny flat is 60m2 or maximum area allowed by the local council
• The block size is greater than 450m2 and a frontage of 12m n.b. smaller blocks  may also gain approval, depending on situation
• The granny flat meets all the standard planning controls, like building heights and setbacks etc.
• The granny flat is built according to the Building Code of Australia

Granny flats may be approved in 21 days by a private certifier if they comply with the state controls and are not on heritage listed or extreme bushfire prone lands greater than BAL 29. If however it does not comply, it can still be approved, but must pass through the DA council application process. 

So, if you are after quality granny flats Sydney presents no better time than right now particularly with a rising market, it makes sense to add value and space to your property, call us today to arrange a “no obligation” free quote.

Our Recent Projects

Our Suppliers

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    Drop us a line

    For any kind of query, contact us with the details below.

    1300 669 707

    Call us now to arrange a display visit