From experience our two main types of customer include

Granny Flats

Sleepouts / Bungalows

Custom Plans

Granny Flat Builders in the Western Sydney Area


Tekton Building Group- Appoint Your Own Builder to Construct the Granny Flat of Your Preference

Granny flats work as an affordable and versatile living choice for different buyers as more and more take interest in these flats. After all, the land is expensive. From parents searching for independent housing for their kids, retirees wanting to downsize, and to people who want their ageing parents close to home for a flexible multi-generational and living arrangement – it’s no wonder that granny flats are so popular today. 

The granny flats are not only ideal for accommodating the members of small families, but these also present the perfect long- or short-term opportunity for rental investment. Besides, it also works as a cost-effective and smart way to expand while maximizing the potential of the backyards. 

When you look for the best granny flat builders to construct and design the granny flat of your preference, consider the name: Tekton Building Group. We are known for offering a grand construction and design approach to manage new granny flats. And this has made our company one of the most renowned names for building bespoke granny flats in and around Sydney.

Tekton Building Group-premier granny flat builder you can trust:

People prefer us because we offer the best level of construction service in place to deal with the granny flat construction project.

At Tekton Building Group, we follow a unique approach to customise every granny flat that we build in Penrith. We take the best of care in the entire construction process, from the very beginning to the end. The quality of the work that we do has made us one of the best granny flat builders in Western Sydney. Even if you are not sure what you’re looking for in a granny flat, we can help by offering you unique designs that co-exist with your present property perfectly. 

We start with the design and drafting section, and then we navigate through the approvals section in St Marys. After that, we complete the entire construction job within 10-12 weeks. Here we also offer the flexibility to accommodate all the special requirements of our clients regarding security, mobility, or access. All you have to do is to communicate with us regarding your circumstances. And we will build and design the right granny flat solution in Kingswood that is ideal for you. 

Why choose us? Six reasons a lot our clients do:

  1. We are one of the best granny flat builders, we only perform high-quality jobs.
  2. We offer customised projects for every client that suit their requirements.
  3. We offer the job at a budget-friendly rate and there is no hidden cost.
  4. We use only use the best quality Australian products.
  5. We offer a complete guarantee on every granny flat construction job that we perform.
  6. We allow our clients to deal with our expert workmen directly.

So, whether you need the granny flat for a teenager’s retreat, an office, a separate living space for ensuring rental income, or for accommodating your elderly relatives, we can help you design and build it. Call us on 0422 605 380 to get a free quote today, and we can get the ball rolling.



We’ve had great success building quality homes in Greater Sydney and are looking to expand our building area.

If you are outside our current building area we would still like to talk with you.

We are very experienced in analysing council requirements to ensure the approval process is as timely as possible.

New housing Estates or Knock Down and Rebuilds, we have great experience in both.

Below is map of the areas we are currently building in.

If you are outside of this area, feel free to fill out your contact details.


From experience our two main types of customer include

Over 10 Years Building Experience in Sydney Area

Large Track Record of Delivering On-Time & On-Budget

Careful Planning, Communication & Design to Bring Your Dreams to Life


1. Initial Enquiry / FREE Site Visit

Our FREE site inspection will identify any initial issues or costs to ensure that your concept is feasible. Our Sales Manager will meet with you to understand your requirements, vision, and budget. Allow 1 hour for this meeting.

Before your FREE Site Visit you need to consider the following:

  • Do you already have plans? Have these been approved by Council?
  • If not, consider the type of house you would like to build (e.g. single or double storey).
  • The features you would like to have (e.g. four bedrooms, home theatre, open plan living area, etc).
  • The style of home (e.g. modern or traditional).
  • When you are planning to build/move in.
  • Your construction and finishing budget.
  • Is your finance in place?
2. Initial Design Phase

If you decide to proceed to the next stage with Tekton Building Group, you will pay an initial design fee. This enables us to obtain a detailed site survey and begin designing your new home concept sketch and you will complete the first round of selections ie. Externals such as bricks, tiles, windows, etc. and we will prepare a fixed price quote according to your initial specifications.

3. Fixed Price Quotation

Once you have signed off the fixed price quotation, a second design fee is required. Fully dimensional working drawings and Hydraulic Engineers DA concept drawings are developed, your Development Application (DA) or Complying Development Certification (CDC) is lodged, the Basix Certificate and any Waste Management or Environmental Statements are obtained. Our interior decorator and preferred supplier consultants will assist you to complete the second round of selections ie. Internals such as tiles, tapware, colours, etc.

4. Council & Planning Approvals

Upon obtaining DA / CDC approvals, you will be required to sign an Housing Industry Association (NSW) Building Contract and pay a Commencement Fee of 5% less any design fees already paid. Your Financial Institution’s Authority is required at this time.

5. Construction

Once your final Contract has been signed and all necessary approvals have been received, building works on your new home can commence. When knocking down and rebuilding, construction will commence after demolition; when building a new home, construction will commence 14 days after the Contract is signed. Our experienced Site Supervisors will manage this phase of your build.

6. Completion & Handover

Just prior to handover, our Site Supervisor will contact you to make an appointment for the final inspection of your new home. You will be required to make your final payment which will include any variations and provisional sums that need to be adjusted. Once received, the keys to your new dream home will be handed to you. Congratulations!

7. Maintenance & Warranty

Tekton building Group offers a 3 month maintenance and defects liability period on all of their homes. Statutory warranties are in effect for 6 years for major defects and 2 years for all other defects. All terms commence from the date when the work was completed.


1. How long will it take to get approval before we can start building a granny flat?

It usually takes approximately 6-8 weeks to gain Complying Development Approval. It is important to keep in mind that each property is different and in turn are assessed individually under the State Environmental Planning Policy, also known as the SEPP.

2. Do we have to gain approval from our local council to build a granny flat or can it be done through a private certifier?

Private certifiers have authority to assess and approve the construction of granny flats. The benefit of gaining approval through a private certifier is that the process is much quicker than submitting documents through a local council. Once your granny flat is approved, the documents are still sent over to your local council for their records.

3. What is a Private Certifier?

Private certifiers are qualified and professional entities that are entitled to issue approval and permits for construction proposals, either residential or commercial.

4. Do all councils in Sydney allow Granny flats?

Yes. However, you will need to check with your local council to see if there are any restrictions, which may prevent a granny flat being built on your block. This is usually highlighted in the 10.7 Planning certificate (formally known as a 149 Planning certificate) that can be purchased from your local council. This document can also be located in the contract of sale of the property.

5. Do I have to use a standard design?

No. At Tekton we specialise in custom designed granny flats to suit your property, however we also have a few floor plan designs that you can select from. You will have the opportunity to sit with our design team to put together a concept.

6. What is the maximum size granny flat I can build?

The maximum size for a granny flat, built as a secondary dwelling, is 60 m2. An attached garage with a roller door can also be constructed.

7. Are there any guidelines I need to meet when building a granny flat on my property?

Yes. All guidelines must comply with the current legislation which is called the Affordable Rental Housing State Environmental Planning Policy 2009, otherwise known as the ‘SEPP’. We can talk further about your property if we need to do a DA Approval. If you comply under a CDC approval and your property is 450m2 the setbacks for a granny flat need to be:

  • 2 meters from the rear fence
  • 0.9 meters from the side fence
8. Can I attach a granny flat to my house?

Yes. However, extra measures will need to be taken in consideration to ensure that proper fire-rated walls are built between the connecting walls.

9. Are there any hidden costs with Tekton Builders?

No. We pride ourselves on no hidden costs. We provide a fixed price quote after we have completed a free site inspection on your property. Any additional costs that are not included are specified in our tender. This is our guarantee to you.