Logan halves granny flat infrastructure charge to encourage new rentals

Building a one-bedroom granny flat in Logan is expected to become $13,500 cheaper after the city council voted to halve the infrastructure charge applied to the small secondary dwellings.

The late-Wednesday decision reduces the charge from $27,000 to $13,500 and is expected to take effect in November. Supporters argue that the lower upfront cost will make more projects viable for families and owners wanting to add a modest rental home.

Opponents, including Logan Mayor Jon Raven, warned that investors could use the discount to intensify small suburban blocks and create overcrowded living conditions.

The disagreement captures the challenge facing many fast-growing Australian councils: secondary dwellings can add housing relatively quickly, but each extra household also places demand on roads, parks, stormwater, water, sewerage and other local infrastructure.

What the discount changes

Infrastructure charges are separate from the physical construction cost of a granny flat. Logan City Council says these charges contribute to trunk infrastructure serving development, including transport, parks, stormwater, water and sewerage networks.

Halving the charge improves the feasibility of eligible one-bedroom projects by a fixed $13,500 before financing and construction costs are considered. That saving could be decisive for an owner whose project sits close to the limit of what rental income or family savings can support.

It does not remove the need to check the property’s planning and building requirements. Council guidance says a secondary dwelling must be self-contained, remain on the same lot and under the same ownership as the primary home, and cannot receive its own separate title.

Size limits and assessment requirements can vary with the zone, lot size and design. Owners should therefore obtain a property-specific estimate rather than treating the council vote as automatic approval to build.

ABC News reported that Logan currently provides a complete infrastructure-charge waiver in certain circumstances where a granny flat is connected to the main home and used by family members. Owners considering multigenerational housing should confirm whether they qualify for that existing arrangement or whether the new half-charge would apply.

Supply benefit comes with local costs

Councillor Nathan St Ledger supported the reduction, arguing that high charges were stopping residents from proceeding with granny flats at a time when families were seeking cheaper and more flexible ways to live together.

A well-designed secondary dwelling can house an older relative, an adult child or a tenant without requiring a new subdivision or large apartment project. It can also give an owner additional income and make better use of an established residential block.

Mayor Raven opposed the change, warning that the discount could be exploited by landlords seeking to fit more renters onto small lots. He linked his concern to Queensland’s 2022 rule changes allowing secondary dwellings to be rented to people who are not members of the household living in the main home.

The council vote passed with eight councillors supporting the motion, three opposing it and one abstaining.

Those concerns do not mean every granny flat will create poor conditions. They do underline the importance of access, parking, private open space, waste collection, privacy and the capacity of existing services when an additional household is added.

Owners should test the full budget

The $13,500 saving should be considered as one part of a complete feasibility assessment. Design, site works, utility connections, certification, finance, insurance and building costs can all materially affect the final price.

Prospective landlords should also test their numbers against achievable local rent rather than assuming the discount guarantees a strong return. Domain’s September rental data showed Brisbane-wide rents stalling even though vacancies remained extremely low, illustrating that tenant affordability can limit rent growth.

For renters, additional well-built granny flats could expand the range of smaller, lower-cost homes in Logan. The practical benefit will depend on where they are built, their quality and whether rents are genuinely below those of larger houses and apartments.

What it means for you

• Eligible one-bedroom granny flat projects are expected to receive a $13,500 infrastructure-charge reduction from November.
• The discount does not replace planning, building, servicing or certification checks.
• Owners should compare the new charge with any family-use waiver that may already apply.
• Renters may gain more small-home options, but design quality and local infrastructure will remain important.