Most people building a custom home plan for the life they have now. The kitchen for how they cook, the living zones for the kids who are currently nine and twelve, the main suite for two people who both still take the stairs two at a time.

Very few plan for the version of the household that exists in twenty years. That is understandable, because it is not a cheerful conversation to have over a set of preliminary drawings.

It is also the conversation that saves the most money. A handful of decisions made at frame stage cost almost nothing. The same decisions made in fifteen years cost a renovation.

Key Takeaways

– The National Construction Code 2022 introduced livable housing requirements for new Class 1a dwellings, in effect in Victoria from 1 May 2024
– The standard covers six areas including step-free entry, 820mm doorways, a hobless shower and reinforced bathroom walls
– Adoption differs across states and territories, so confirm what applies with your building surveyor
– Structure, drainage falls and circulation width are the three things you genuinely cannot retrofit cheaply
– If your project includes a consulting or treatment space, that portion sits under a different compliance regime entirely

The Rules Changed And A Lot Of People Missed It

The NCC 2022 brought in a set of livable housing provisions for new homes, drawn from the silver level of the Livable Housing Australia guidelines. They apply to new Class 1a dwellings, which is to say houses, townhouses and villa units.

The standard runs to six parts: getting from the street to the door, the entrance itself, internal doors and corridors, the sanitary compartment, the shower and wall reinforcement.

In practice that means a step-free path to at least one entry, a minimum 820mm clear opening on specified internal doorways, at least one toilet on the entry level, one hobless shower and walls near showers, baths and toilets built to take grabrails later.

None of it is exotic. An 870mm door leaf generally delivers the 820mm clear opening, and the parking provision asks for an unobstructed space of 3200mm by 5400mm.

Timing varies by jurisdiction. Victoria brought the provisions in on 1 May 2024, other states and territories adopted on different dates and some have not adopted them at all, so the only reliable answer is the one your building surveyor gives you.

Why This Suits A Bespoke Approach

Here is the thing worth understanding. Meeting the minimum is a compliance exercise, and any competent builder will handle it. Designing past the minimum is a design exercise, and that is a different conversation entirely.

A standard plan absorbs these requirements by trimming somewhere else, usually a corridor or a wet area. A design drawn around your block and your household can absorb them without anything feeling squeezed.

That distinction shapes the whole project, and the custom build differences are worth understanding properly before you commit to a builder.

The Three Things You Cannot Cheaply Undo

Structure is first. If there is any prospect of a lift, a stacked pair of storage cupboards on both levels gives you a shaft later for the cost of some cabinetry now.

Drainage falls are second. A hobless shower depends on the slab being set down and the falls being right, and correcting that in an existing bathroom means cutting concrete.

Circulation width is third. You can widen a doorway. You cannot widen a hallway without moving walls, and moving walls in a finished house means services, plaster, flooring and paint.

Designing For Care, Not Just Mobility

Mobility gets all the attention because it is the easy part to picture. Care is the harder scenario and the more likely one.

Think about whether a bed can be approached from both sides in at least one bedroom. Whether there is a power point and data outlet where equipment would realistically sit. Whether a carer can get a wheeled frame past the end of the bed to the ensuite.

Also think about the ground floor. A home with the main suite upstairs and no bedroom below works beautifully until someone cannot manage stairs, and then it stops working overnight.

When The Brief Crosses Into Clinical Territory

A growing number of custom home briefs now include a working clinical space. A GP building a consulting suite at the front of the property, an allied health practitioner adding a treatment room, a family creating a properly equipped care wing.

The moment a space is used to treat patients, it stops being residential work. Different approvals, different accessibility obligations, different requirements around infection control, equipment integration, acoustic separation and patient flow.

This is where a specialist healthcare construction company earns its place alongside your home builder. SoulMED is a family-owned Melbourne practice delivering turnkey medical fitouts across Victoria, managing planning, permits, construction and handover as one accountable scope.

Their work spans medical, dental, radiology, veterinary and allied health spaces, and the process is built around a single point of contact, transparent cost management, weekly construction updates and structured milestone reporting.

Most fitouts run six to ten weeks depending on size and scope, and council approval management and DDA compliance guidance are handled as part of the job. For a homeowner already carrying the load of a custom build, having the clinical portion owned by people who do only that is worth a great deal.

What To Actually Put In The Brief

Ask for one bedroom and one full bathroom on the entry level, even if nobody will use them for a decade. It is the single highest-value line item on this list.

Ask for noggins in every wet area wall, not just the ones the code names. Timber is cheap and the alternative is opening up tiled walls later.

Ask for a stacked cupboard alignment if the home is over two levels. Ask what the corridor widths actually are rather than whether they comply.

Then ask your builder to price the difference. On most projects it lands well under one per cent of the build cost, which tends to end the debate fairly quickly.

The Takeaway

Nobody builds a custom home hoping to plan for decline. The point is not to design a hospital. It is to avoid designing a house that quietly fails the people in it.

The best version of this work is invisible. Wider halls read as generous, a level shower reads as contemporary, a ground floor guest suite reads as hospitality. Nobody walking through will know you future-proofed anything, which is rather the point.

Frequently Asked Questions

Do the livable housing rules apply to renovations?

They are written for new building work. For alterations and extensions to an existing dwelling, the relevant building surveyor has discretion over how far the upgrade requirement extends, so the answer depends on your project and your jurisdiction.

Will designing this way make the home look institutional?

Not if it is handled at design stage. Wider corridors, level thresholds and hobless showers are all standard features of high-end contemporary homes, and none of them read as clinical when the detailing is right.

How much does building beyond the minimum add?

It varies with the design, but the items in this article are mostly structural allowances and blocking rather than finished elements. Ask your builder to price them as a separate line so you can see the real number instead of guessing.

Can my home builder handle a consulting room on the same site?

Some can, many cannot. Clinical spaces carry approval and compliance requirements that sit outside typical residential work, so most homeowners are better served running that portion through a builder who specialises in healthcare projects.