Why the most important interior design decisions happen before your slab is poured
- Deanna
- Apr 18
- 4 min read
Most people hire an interior designer when their home is nearly finished. At Estetica, we'd love to change that, because the decisions that matter most happen long before the build begins.
There's a moment that happens in almost every building project. The slab is down, the walls are up, and the client - excited, a little overwhelmed - starts thinking about interiors. Paint colours. Tiles. Tapware. Maybe furniture. It feels like the right time. The house is starting to look like a house.
But here's what most people don't realise: by the time the slab is poured, the most consequential design decisions have already been made. And in many cases, they've been made without a designer in the room at all.
At Estetica Design Studio, we're interior architects. The distinction matters - and this post is about why.
The decisions that define a home aren't the ones you think
When most people think about interior design, they think about the visible layer, the colours, the materials, the furniture. And yes, those things matter. But they sit on top of a set of deeper decisions that shape whether a home actually feels right to live in.
How does the entry sequence unfold? How do the kitchen, living and dining spaces connect - or not? Is the ceiling height consistent across the whole home, or does it shift to create moments of drama and intimacy? How are the bathrooms laid out for optimised potential?
These are spatial decisions. Structural decisions. And they need to be made before construction begins, because once the slab is down the walls are up, changing them is expensive. Sometimes impossible.
"A wall moved on paper costs a conversation. A wall moved mid-build costs time and money. A wall moved after handover ... nightmare"
What interior architecture actually means
Interior architecture sits at the intersection of design and structure. It's the practice of shaping space itself, considering the proportions of rooms, the flow between them, how the built environment responds to light and orientation, and how the interior language reflects and enhances the architecture of the home.
It requires an understanding of construction. Of how buildings are actually put together. Of what can and can't be changed once work begins. That knowledge, combined with a designer's sensitivity to how people actually live and move through space, is what separates interior architecture from interior decoration.
At Estetica, our founder Deanna Caccamo brings both, a formal architectural education and over ten years working across design and construction on some of Perth's finest homes. That dual fluency is at the heart of how we work.
What we can do before the build that we can't do after
Examples of pre-build interventions which you can't change later
Repositioning a kitchen island to improve traffic flow between the living and outdoor areas. Widening a hallway by 300mm to transform it from a corridor into a gallery. Adjusting window heights to work in with the cabinetry design. Moving a bathroom to make a master suite feel genuinely private. Raising a ceiling in one key room to create a sense of arrival. None of these are dramatic changes on paper. All of them profoundly affect how a home feels to live in - and none of them are easy to fix once the build is complete.
These changes cost nothing when they happen on paper. When they happen mid-build, they involve variations, delays and sometimes structural engineers. When they're discovered after handover, they simply don't happen - and the homeowner lives with a compromise they might not even be able to name, just a feeling that something isn't quite right.
The best time to call us
Ideally, before your architectural documentation is finalised. That's the window of maximum flexibility, when spatial changes are still straightforward, when the conversation between interior and architecture can happen in real time, and when every decision can be made with the full picture in mind.
If you're already in the early stages of working with a building designer or architect, even better. We work alongside them as peers -contributing the interior perspective from the very beginning of the design process, not arriving at the end to choose curtains.
If your home is already under construction, we can still add significant value - particularly with material selections, joinery design, and furniture curation. But the spatial conversation is harder to have. Which is why we always say: the sooner, the better.
A note for those who feel overwhelmed
Building a home is one of the largest decisions most people will ever make. The process is long, the choices are endless, and the stakes feel high - because they are. One of the things we hear most often from new clients is that they didn't know where to start, or that they were making decisions in isolation without understanding how they connected to each other.
That's exactly what we're here for. Not just to make your home beautiful - though we take that seriously - but to make the process feel considered, coherent, and genuinely enjoyable. When every decision is made as part of a whole, the result isn't just a good-looking home. It's a home that works.
Thinking about building in Perth?
The earlier we're part of the conversation, the more we can shape the outcome. Whether you're pre-design or mid-build, we'd love to understand your project and explore how Estetica can help.
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