Duplex Home Designs & Duplex Builders

A duplex is two separate, self-contained homes, built side by side on one block of land, each with its own entrance, kitchen, bathrooms and living areas. Each home is often on its own title, which sets a duplex apart from a granny flat or dual living home.

A duplex is two self-contained, fully separate homes, typically on their own titles. Dual living usually consists of one main home with a smaller secondary dwelling attached, sharing a single title. See the full comparison above.

Torrens title means you own your half of the duplex and the land it sits on outright, with full autonomy over renovations and resale. Strata title means the block is divided into two lots, with shared ownership of common areas such as the driveway, roof, and dividing wall, managed through an owners' corporation.

Every Montgomery Homes duplex is designed with separate entries, kitchens and living areas. We also think carefully about where bedrooms, windows and the common wall sit, so each home feels like its own, not half of someone else's.

It can be more complex than a standard home loan, particularly for dual-title or SMSF purchases, but it's far from out of reach. We work alongside finance specialists who understand duplex and dual-occupancy lending and can point you in the right direction.

If your duplex is built on separate titles (Torrens or strata), you can typically sell one home and keep the other, or sell both together. It gives you options you simply don't get with a single dwelling.

It can be, with two rental incomes from one block and the option to sell one home and keep the other. Whether it's a good investment for you depends on your block, your local rental market and your long-term plans, so we'd always suggest speaking with a financial adviser alongside our team. We'll give you a clear picture of what your block can support, so you can weigh it up with the right information.

Possibly, and maybe more easily than you'd think. Recent changes to NSW planning rules have made dual occupancy on smaller lots possible. The only way to know for certain is a site inspection, which is free and doesn't commit you to anything.

A single-storey duplex suits buyers who want easy, step-free living, such as downsizers or ageing parents. Double-storey designs make more of a smaller block, giving each home extra living space without giving up the backyard. Your block size, slope and how you plan to use each home will usually point to the right choice, and our team can help you compare floor plans that fit.

Not always. Many duplexes are mirrored because it makes the best use of the block, but the two homes can sometimes be designed differently, for example, with one set up for downsizing parents and the other for a growing family. Your block and council requirements will shape how much the two homes can differ.

Yes, our duplex designs are flexible, so we can adjust the floor plans to suit your block and the way you want to live. Common changes include swapping the position of the master bedroom to the front or rear of the home, or opting for a different bathroom layout. We'll talk through what's possible for your site during the design stage.

It depends on the design you choose and the size of your block, since each home needs its own share of the land for the building, yard and parking. We'll show you which floor plans fit your site, so you can compare the living space in each home before you commit.

Where a duplex is subdivided into separate titles, each home generally needs its own service connections and separate meters. We'll talk you through the servicing requirements for your block during the site assessment.

Timeframes vary depending on your design, site conditions and council approvals, much like any new build. Our team can map out the whole process and an expected timeline once we understand your block.

We build duplex homes across Greater Sydney, Newcastle, the Central Coast, Lake Macquarie, Wollongong and the Illawarra.