Granny Flats Canberra | Premium Granny Flat Builders ACT | Aztec Building Solutions
Aztec Building Solutions  /  Canberra & the ACT

Granny Flats
Canberra

From $99k. Built on your block, not in a factory.

An Aztec granny flat is not a product delivered to your driveway. It is framed, clad and finished on site, designed around your block, your setbacks and the way you actually want to live.

Class C Licensed
Fixed Price
Designed to Your Block

Also building home extensions, renovations and new homes across Canberra.

Did you know?

A granny flat can be built as part of your home, not as a separate dwelling. You get the space of an extension without the demolition, built to a 7-star energy rating. And since the May budget, spending on your own home is treated very differently from buying an investment.

What changed in May ↓
5.0
★★★★★

On Google

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01  The value

A granny flat is not an expense. It is floor area.

A shed, a pod or a transportable unit sitting in the yard is not part of your house. A granny flat built properly, on footings and finished the way the house is, becomes a permanent part of the property.

Worth knowing

The rules on investment property changed in May.

The May 2026 federal budget reformed how residential property investment is taxed. From 1 July 2027, negative gearing on residential property is limited to new builds, and the 50% capital gains tax discount is replaced with cost base indexation and a 30% minimum rate. Property owned before 7:30pm on 12 May 2026 is grandfathered, and gains accrued before July 2027 are protected.

The rules covering your own home were not part of that reform. A granny flat built as part of your home is an addition to the home you live in, not a separate investment property. For a lot of people that shifts the arithmetic on where to put the next hundred and fifty thousand, and building on the block you already own is worth a fresh look against buying an established rental.

We build granny flats, we do not give tax advice. How any of this lands depends on your circumstances and how the granny flat is used. Take it to your accountant. The ATO has published the detail.

02  The difference

Custom built. Not modular.

This is where the difference shows. A custom-built Aztec granny flat is a permanent addition to your property, the same way a home extension is. A modular or transportable unit does not. It reads as a separate product sitting on your land, and it is treated that way.

Every Aztec build goes up on your block the way a house goes up: conventional timber frame, full insulation, plasterboard, cladding, proper footings. No joins running up the walls. It is not delivered. It is built, and it lasts as long as the house in front of it.

  • Custom built on siteModular / transportable
  • Permanent addition to the propertyOften treated as a chattel
  • Designed to your blockFixed footprint, fixed plan
  • Conventional frame, no wall joinsPanel joins visible over time
  • Same lifespan as your homeDepreciating product
Custom-built granny flat under construction Canberra
Framed on site  /  Canberra
03  Before you commit

Three questions worth asking every granny flat builder.

A granny flat is permanent. The answers to these three questions are what separate a build that adds value from one that costs you later.

I

Who is actually building it?

Every Aztec build is delivered under my own ACT Class C builder's licence and is fully insured. That protection follows the property under the Building Act. It is not a subcontractor arrangement that disappears when the job is done.

II

Is it approved and certified?

Every Aztec build goes through building approval and certification, and I handle the paperwork. It can be built as a studio, or as part of your home to a 7-star energy rating, with a thicker slab, double glazing and heavier roofing. At the site visit I will match the build to how you plan to use it, and tell you exactly what you are getting and why.

III

What is actually included?

Plumbing, electrical, site preparation and standard earthworks are built into my quoted price, not capped at a low provisional figure that becomes a variation three months in. On nearly every site, the quoted price is the price you pay.

Aaron Volpato-Boucher, director of Aztec Building Solutions, on site at a Canberra granny flat build
I would rather build fewer granny flats well than a hundred quickly. Every job I do, my name is on it.
Aaron Volpato-Boucher
Director, Aztec Building Solutions
ACT Builders Licence 2018718  ·  MBA Member 15000
04  Footprints

Four ways to size a granny flat.

These are the sizes we build most often, and the prices they start from. Every one is then drawn to suit your block, your access and your brief. Click any image to enlarge.

Small Granny Flat Render Canberra Small Granny Flat Floor Plan

Small granny flat

30m²

From $99,000 inc GST

  • Bedrooms1
  • Bathroom1
  • Best forStudio, office or single occupant
Quote the small
Most chosen
Medium Granny Flat Render Canberra Medium Granny Flat Floor Plan

Medium granny flat

40m²

From $123,000 inc GST

  • Bedrooms1 or 2
  • Bathroom1
  • Best forCouples, family or a home office
Quote the medium
Large Granny Flat Render Canberra Large Granny Flat Floor Plan

Large granny flat

50m²

From $143,000 inc GST

  • Bedrooms2 or 3
  • Bathroom1
  • Best forMulti-generational living
Quote the large
Fourth option

More than 50m²

Some blocks carry more, and some briefs need it: two bathrooms, a proper second living space, a home office with its own entry. Larger builds are drawn from scratch, so they sit outside the online quote builder. Call and we will price it properly against your block and your brief.

  • Bedrooms2 to 3, or more
  • Bathrooms1 or 2
  • DesignDrawn from scratch
  • Best forLarger blocks, bigger briefs

Starting prices for a standard site, inc GST. Your quote shows the price two ways: as a studio, and built as part of your home. Start your quote in the quote builder.

05  Recent work

Granny flats built across Canberra.

From a 30m² studio in Gordon to a 55m² two bedroom in Palmerston, every one designed around what the block would allow.

Completed 55m² granny flat in Palmerston, Canberra
Completed  /  Palmerston

Palmerston Granny Flat

A 55m² build on a generous Gungahlin block, taken past the standard footprint to fit two proper bedrooms alongside a full kitchen and open living area. Sited to keep the main house's northern light and leave the back yard usable.

55m²  ·  2 Bed  ·  1 Bath  ·  Gungahlin
Completed granny flat in Calwell, Canberra
Completed  /  Calwell

Calwell Granny Flat

Permanent on-site construction with premium finishes throughout. Built to add long-term value to the property, not just floor space.

2 Bed  ·  1 Bath  ·  Tuggeranong
30m² studio granny flat under construction in Gordon, Canberra
Work in progress  /  Gordon

Gordon Granny Flat

A 30m² studio layout with the kitchen set into the main living space and a separate bathroom. Currently on site. Proof that the smallest footprint still lives well when the plan is drawn properly.

30m²  ·  Studio  ·  1 Bath  ·  Tuggeranong
Narrabundah Granny Flat Canberra
Completed  /  Narrabundah

Narrabundah Granny Flat

Contemporary design with quality finishes throughout, on a compact inner-south block. Equally suited to extended family or a quiet place to work.

2 Bed  ·  1 Bath  ·  Inner South
Red Hill Granny Flat Canberra
Completed  /  Red Hill

Red Hill Granny Flat

Architecturally designed dual occupancy with premium finishes, detailed to sit with the existing home rather than behind it.

2 Bed  ·  1 Bath  ·  Inner South
06  How we work

One builder, one price, one point of contact.

You are not managing six trades and a project manager you never meet. You are dealing with the licensed builder who is on your site.

Turnkey from first sketch to keys

Design, documentation, approvals, construction and handover under one contract. No coordinating separate consultants and contractors yourself.

Fixed price, held

Your quote is your final price. Site preparation and standard earthworks are inside it, not sitting outside it as a provisional sum waiting to move.

Licensed and insured

Fully licensed ACT Class C builder with comprehensive insurance. All work complies with ACT building regulations.

Approvals handled

Development applications, building approvals and certification all managed through ACT Planning on your behalf.

Finished to house standard

The same materials and the same detailing we would use on the main residence. That is what makes it count as living area rather than an outbuilding.

Realistic dates, kept

Honest timelines set at the start and consistent communication through the build. You will know where the job is without having to chase it.

07  The process

Building your granny flat, in five stages.

Typically four to six months from approval to handover. Six to eight weeks for approvals, twelve to sixteen weeks on site.

01

Design & quote

Choose your size, set your finishes and receive a fixed-price quote. Free consultation to work through your requirements.

02

Site assessment

We walk your property, confirm placement, access and setbacks, and finalise the design around what the block will carry.

03

Approvals

Development application, building approval and certification, all prepared and lodged for you.

04

Construction

Footings, frame, lock-up, fit-off. Regular progress updates and one builder accountable throughout.

05

Handover

Final inspection, occupancy certificate and keys. Ready to move in.

08  Background

Understanding granny flats in Canberra.

What a secondary dwelling actually is under the Territory Plan, what it takes to get one approved, and why the four most common reasons for building one all point the same way.

Granny flats, known formally as secondary dwellings or dual occupancies, are self-contained living spaces built on an existing residential property. They have become increasingly common across the ACT as owners look to make better use of land they already hold: housing extended family, creating a proper place to work, or simply adding usable, valuable floor area to a property without moving.

The land is the expensive part, and you already own it. Everything after that is construction cost, and what you get is permanent floor area.

That is the whole argument in one line. A buyer or a valuer looking at your property afterwards sees a larger, more flexible home, not a structure in the back yard.

In Canberra, granny flats must comply with the Territory Plan and obtain the necessary approvals from ACT Planning. The assessment considers block size, setbacks, solar access, parking and how the design sits with the existing home. According to the Housing Industry Association, professionally built secondary dwellings typically add meaningfully to property values, which is consistent with what valuers do in practice: they look at what is permanently built, not at what is parked in the yard.

Location shapes the design more than most people expect. Inner suburbs such as Narrabundah and Red Hill often have compact blocks and mature trees, which calls for careful siting and a narrower footprint. Outer suburbs like Gungahlin and Tuggeranong generally have the room for a larger build, with a second bedroom or a proper living room.

Whether your street is established character housing or newer estate construction, the granny flat should read as part of the property rather than an addition to it. That is a design decision made at the start, and it is one of the things that separates a build that lifts a valuation from one that simply occupies the yard.

  • Why people build
  • Family close by Ageing parents or adult children housed independently, without anyone leaving the property.
  • Property value Permanent floor area added to the property, and more flexibility for whoever owns it next.
  • Work from home A studio or office genuinely separated from the house, with its own front door.
09  Where we build

Granny flat builders across the ACT.

Every district in Canberra, and the surrounding region.

Belconnen

Bruce, Evatt, McKellar, Page, Weetangera, Hawker and all Belconnen suburbs.

Tuggeranong

Kambah, Wanniassa, Fadden, Monash, Calwell, Gordon, Theodore and surrounding areas.

Gungahlin

Harrison, Franklin, Amaroo, Ngunnawal, Palmerston and all northern suburbs.

Woden Valley

Phillip, Woden, Hughes, Curtin, Lyons and surrounding Woden suburbs.

Weston Creek

Duffy, Holder, Waramanga, Weston, Rivett and all Weston Creek areas.

Inner South

Narrabundah, Red Hill, Griffith, Forrest, Kingston and central Canberra.

10  Questions

Granny flat FAQs.

Costs vary with size and finish. Our small (30m²) granny flats start from $99,000, medium (40m²) from $123,000 and large (50m²) from $143,000, inclusive of GST, on a standard site. The quote builder emails you a written quote for the size, floor plan and external style you choose, priced as a studio and built as part of your home.

A properly built, approved granny flat is a permanent part of the property, built and finished the way the house is. That is a different proposition to a transportable or modular unit, which is often treated as a chattel rather than part of the dwelling. What it adds to a valuation depends on suburb, block, finish and the market at the time, and a valuer assesses the property as a whole.

Yes, subject to what your block and the Territory Plan will allow, up to the 90m² limit. Larger builds are designed and priced individually rather than through the online quote builder. Give Aaron a call and he will work it through against your block and your brief.

Every build needs building approval. Whether a development application is also needed depends on what you build and your block. We confirm that at the site visit and handle every application, document and submission as part of the service.

From approval to completion, typically four to six months. That is six to eight weeks for permits and approvals, and twelve to sixteen weeks of construction depending on size and site complexity.

It depends on how the granny flat is built and approved, and that is decided at the start. If renting it out is part of your plan, tell Aaron at the site visit and he will explain exactly what that build involves.

Since the July 2026 Territory Plan changes there is no longer a minimum block size for a secondary residence in the ACT. The practical limits are now site coverage, tree canopy and planting area, plus the 90m² cap. We confirm exactly what your block will carry at the site consultation.

Turnkey pricing includes all electrical, plumbing and essential service connections to the granny flat. Any upgrade required to the main property's utility connections is quoted separately if it applies.

You already own the expensive part.

Design your granny flat online and get a fixed price back, or call and talk it through with the builder who will be on your site.

Free consultation  ·  Fixed pricing  ·  Complete turnkey service
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