A clearer way to begin

Granny flat plans, prices and building guide.

A granny flat project starts with three decisions: which home suits the people living in it, what the site can accommodate, and what the written price covers. DollarBuild brings the supplied plans, published state prices and design-and-build process together, so those decisions can be made in the right order.

Start with your state.

These are the published AUD build prices, including GST and paperwork. A listed price is not a finding that a design is approved on your lot. Confirm site requirements, the detailed specification and the programme before signing.

An unlisted state or product needs a written quote; another state’s price does not apply. Price book updated: .

Choose rooms before square metres.

The product names are nominal size categories. Open the supplied drawing to see its labelled area and room arrangement. Standard and Premium 80 share the supplied layouts; Premium specifications belong in the written schedule.

Swipe or scroll across the table to compare every detail. Keyboard users can focus the table and use the arrow keys.

Choose rooms before square metres.
HomeBedroomsBathroomsClear ceilingSupplied plans
Compact 34112.4 mView plans →
Home 602 / 312.4 mView plans →
Home 802 / 322.7 mView plans →
Home 80 Premium2 / 322.7 mView plans →
Home 80 Premium + Garage222.7 mView plans →
Rooming House 300992.4 mView plans →

The supplied garage plan has two bedrooms and two bathrooms, with a nominal 20 m² enclosed garage. A three-bedroom garage layout has not been supplied.

The nine-bedroom, nine-ensuite Rooming House 300 is a separate housing and operating proposition. It is not assessed as a granny flat. Its previously built design has its own product page, rules reference and address review.

Explore the rooming house pathway →

Make the comparison on paper.

A material kit, an off-site module and an on-site build describe different delivery work. Compare the same finished specification and assigned responsibilities, rather than a headline square-metre rate.

Turnkey, including paperwork

Fixed price

Your agreed contract price stays fixed throughout the build.

Fixed timeline

4 weeks + 3 months
  1. 4 weeks paperwork
  2. Then
    3 months construction

Scope, site requirements and the schedule are agreed before signing.

01

The dwelling

Record the selected drawing revision, room layout, ceiling height, finish schedule, appliances, services and any garage. Keep the visualisation separate from the agreed construction documents.

02

The site

Resolve the survey, soil and foundation design, levels, drainage, utility connections, access and any demolition or retaining work. List each item as included, allowed for, separately priced or excluded.

03

The responsibilities

Identify who prepares and pays for documents, applications, engineering, inspections and certificates. State the registered building practitioner and contract parties in the project documents.

04

The handover

Agree the completion evidence, service connections, required inspections and occupancy documentation. A rendering, a price list and an issued building approval each answer a different question.

One catalogue. Different approval pathways.

The published catalogue describes the homes. State rules, the council scheme and the individual site determine the approval pathway. Use the official source for your state, then obtain an address-specific review.

Victoria · small second dwellings after VC306

Amendment VC306, gazetted and in operation from 15 October 2026, lets a small second dwelling of up to 80 m² total floor area (60 m² before) be built without a planning permit where the zone conditions are met — in the General Residential Zone, a lot of 300 m² or more, no more than one existing dwelling, no other small second dwelling and no reticulated gas — unless an overlay or a title restriction says otherwise. The area is measured to the outside of the external walls, excluding attached decks, verandahs and pergolas. A building permit is always needed, and the Building Regulations 2018 (version 031) still define a small second dwelling as 60 m² or less, so a building surveyor confirms the building pathway for a 60–80 m² design.

The Victorian rule, line by line

Planning limit
80 m² total floor area — Clause 73.03 as amended by VC306, gazetted and operative 15 October 2026. Under VC253 (14 December 2023 to 14 October 2026) it was 60 m².
How it is measured
Every floor of the dwelling, to the outside surface of the external walls (or the centre of a party wall). Attached or abutting decks, verandahs, pergolas, porches, patios and terraces are not counted.
No planning permit when
In the General Residential Zone (Clause 32.08): a lot of 300 m² or more, no more than one existing dwelling, the only small second dwelling on the lot and no reticulated natural gas. If one of those three use conditions is not met, the zone lists the use as prohibited rather than offering a permit. Other zones carry their own conditions.
Still needs a permit or a check
A lot under 300 m² (Clause 32.08-6), an overlay that triggers a permit, a covenant or Section 173 agreement on title, and the minimum garden area on lots of 400 m² or more.
Removed by VC306
Clause 54.03-5, the planning safety-and-accessibility standard for small second dwellings.
Building permit
Always required. Building Regulations 2018 version 031 (in force from 1 September 2026 and current on 21 October 2026) still define a small second dwelling as 60 m² or less (reg 5(1)); matching amendments are to follow. A building surveyor confirms the pathway for a 60–80 m² design before it is fixed.

Primary sources

Primary documents re-read on

Read the official guidance ↗

Planning Victoria · Small second homes

New South Wales · secondary dwellings

The Housing SEPP provides development-consent and complying-development pathways, each with requirements. A compliant-looking floor plan is not a complying development certificate. Ask the council or certifier to confirm the applicable controls, site constraints and documents.

Read the official guidance ↗

NSW Planning · Secondary dwellings

Queensland · local council assessment

Queensland’s state guidance says a new secondary dwelling requires building approval, while development approval depends on the council’s rules. Confirm the local planning scheme, siting, services and certification for the address; a state-wide catalogue does not replace that check.

Read the official guidance ↗

Queensland Planning · Secondary dwellings

Western Australia · ancillary dwellings

The R-Codes address ancillary dwellings and their design requirements. WA’s official guidance directs site-specific interpretation to the relevant local government. Confirm the current R-Code, local planning framework and building approval before settling on a drawing.

Read the official guidance ↗

WA Planning · Residential Design Codes

A planning exemption and a building approval are different things. The Victorian small second dwelling rule does not determine the planning, building, registration or licensing position of a rooming house.

See the work. Ask what the record proves.

DollarBuild was formed in 2026. The portfolio identifies earlier projects delivered by the founding team; the site gallery records real construction stages. Product facade images are architectural visualisations. Use each kind of evidence for the question it can answer.

Questions worth settling early.

How much does a DollarBuild granny flat cost?

The state tables on this page show the current published build prices in AUD including GST and paperwork. Prices vary by state and selected product. Site requirements, the detailed specification and the programme are agreed in writing before signing; unlisted combinations need a quote.

Are the 34, 60 and 80 m² names the exact drawing areas?

They are nominal product categories. The Fernwood one-bedroom drawing is 34.3 m². The supplied 60 m² two- and three-bedroom plans show 59.79 m² and 59.59 m². Open the product’s actual plan rather than inferring internal area from its name.

Does choosing a small plan remove the need for approval?

Not by itself. In Victoria, VC306 (15 October 2026) lets a small second dwelling of up to 80 m², measured to the outside of the external walls, skip the planning permit when the zone, lot and title conditions are met, yet a building permit is always required and the Building Regulations still use 60 m², so a building surveyor confirms any 60–80 m² design. Other states and councils have their own pathways.

What is the fixed-price build programme?

The published commitment is turnkey including paperwork: 4 weeks paperwork, then 3 months construction. The agreed contract price stays fixed throughout the build. Scope, site requirements and the schedule are agreed before signing.

Is a 300 m² rooming house just a larger granny flat?

No. The nine-room product needs its own planning and building assessment, with operating registration and licensing considered separately where applicable. Use the rooming-house service guide and address review rather than applying a secondary-dwelling rule to it.

Bring the address. We will work through the scope.

Tell us your state, preferred layout and what is already on the site. The next step is a written project proposal.