We design and build modular homes for Mount Gambier homeowners, investors, and businesses looking for a faster, more flexible alternative to traditional construction. Our homes are built off-site and delivered ready for installation, helping reduce build time and keep on-site disruption to a minimum.
Modular homes suit many types of builds in Mount Gambier, especially when you want extra space without months of on-site work. Our common projects include:
A comfortable second home for family, older parents, or adult kids who want their own space nearby.
A smaller, easier-to-manage home on an existing block.
A separate living space designed for long-term tenants, with practical layouts and durable finishes.
A space away from the main house, ideal for focused work, client meetings, or creative use.
Extra space that gives everyone breathing room, without redesigning your main home.
A private setup for visiting family or friends, or occasional stays where permitted.
If you need extra space for your team, students, members, or customers, modular is a practical way to add it without turning your site into a building zone for months. We design and deliver commercial modular buildings in Mount Gambier and across the Limestone Coast for businesses, schools, clubs, and community organisations.
Common builds include:
A comfortable home starts with smart design choices. Our modular homes can be specified with features that support energy efficiency and help reduce ongoing running costs.
Because your home is built in a controlled environment, materials are handled more efficiently, and waste is reduced. It also means weather delays are less likely to stall construction progress, which can be a big win during colder, wetter months.
Prefab doesn’t mean you’re locked into a fixed layout. We tailor the footprint, floor plan, and finish level around how you’ll use the space, plus what your block will allow in Mount Gambier.
Add-on storage or covered areas, depending on your design and site
Cost depends on the design, size, inclusions, and what’s required for site preparation (foundations, access, services, and any site constraints). For current pricing ranges, we recommend downloading our brochure, which includes the latest options.
“Prefab” is the umbrella term. Prefabricated homes include several build methods, and modular design is one of the most common. In everyday conversation, people use “modular” and “prefab” interchangeably. What we offer is a prefab modular home approach, where most of the home is built off-site, then delivered and installed on your property.
This is where we shape the layout and look of your home based on your goals, site constraints, and intended use. Your concept and drawings help confirm the footprint, room flow, key inclusions, and how the design will work on your block before you move into approvals and build planning.
Site preparation can include clearing, levelling where needed, foundations (stumps, piers, or slab depending on the design and block), drainage planning, and getting services ready for connection. Access matters in Mount Gambier too, so we’ll factor delivery and placement requirements in early.
In most cases, yes. A building permit is typically required, and the exact requirements can vary depending on your local council and site conditions. We’ll help you understand what’s usually needed and what documentation is typically required.
A big benefit of prefabrication is the controlled build environment. Our quality assurance process includes structured checks during construction, then final checks around delivery and installation to ensure everything is finished to the agreed scope.
Yes. If sustainable living is a priority, we can guide material selections and inclusions that support sustainable homes, such as insulation choices, glazing options, and planning for solar energy solutions. If you’re aiming for a 7-star energy efficiency rating, we can discuss design considerations and what’s achievable based on your site and compliance requirements.
Often, yes. Because much of the home is built off-site, the overall timeline can be shorter and easier to plan around. The exact “expedited process” depends on design complexity, approvals, and site works, but modular construction helps reduce common delays.
We deliver across multiple regions in South Australia. If you’re outside Mount Gambier, tell us where your site is and what you’re building, and we’ll confirm feasibility, transport considerations, and next steps.
If you’re considering a modular home in Mount Gambier, we’ll help you work through the practical details first, including site access, intended use, preferred layout, and finish level. From there, we can provide next steps and a tailored quote.
Phone: 1300 848 553
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About Us
Out-Back Portable Buildings specialises in providing high-quality, custom-built portable buildings to families and businesses in South Australia. Our range of demountable and prefab structures includes portable granny flats, houses, and offices that can be designed to meet your specific requirements.
Whether you need extra living space, a dedicated outbuilding, or a functional workspace, our portable buildings are the perfect solution.
