Last updated: August 2026
The most expensive room in any house is the one nobody uses.
Home size affects almost everything: purchase price, foundations, site fit, energy use, furnishing and maintenance. Yet most people choose it by instinct.
A better approach is simple: Start with how you live, then build the square metres around that.
Start with people, not square metres
Forget the headline number for a moment. Ask instead:
Who lives here every day?
Do you work from home?
How often do guests stay overnight?
Do you need a utility room?
Do children need separate bedrooms?
Could a parent live with you later?
Do you genuinely need a spare room, or will it become storage?
The biggest sizing mistake is designing the whole house around the few days each year when everyone visits at once. You then pay for that space every other day.
Spend space where you actually live
Not every square metre has equal value. A slightly larger kitchen and living area may improve daily life far more than an oversized hallway or rarely used spare bedroom.
As a practical guide:
Kitchen, dining and living
Usually around 25–40 m², depending on household size.
This is where most families spend the greatest amount of time, so this is normally the best place to be generous.
Main bedroom
Around 12–16 m² works well when wardrobes and storage are properly planned.
A bigger bedroom is not automatically a better bedroom.
Additional bedrooms
Around 9–12 m² can work very well for children, guests or a home office.
Good furniture positioning matters more than adding another metre around every wall.
Bathrooms
A practical family bathroom can often work within 4–6 m². An en-suite may need only 3–4 m² when designed properly.
Utility and storage
This is the space people are most likely to underestimate. A few well-planned metres for laundry, cleaning equipment, coats and household storage can make the entire house feel larger.
Hallways and circulation
This is where bad layouts waste money. You pay for corridors exactly the same way you pay for kitchens. A good floor plan moves people efficiently through the house without dedicating large areas purely to circulation.
What different home sizes actually feel like
Compact: around 30–50 m². Best suited to one or two people.
A well-designed compact home can still have a proper bedroom, bathroom, full kitchen, living space and useful storage. This size works particularly well for:
- couples;
- single-person homes;
- downsizing;
- garden homes;
- accommodation for parents or adult children;
- holiday or second homes.
Small does not have to mean temporary. It just has to be designed properly.
Mid-size: around 55–90 m². This is often the sweet spot for couples, smaller families and people who need a genuine home office. There is enough space for two or three bedrooms, a generous living area and proper storage without the house becoming unnecessarily large. This is where many of our R Family and L Family homes sit. The L-shape in particular can create useful separation between living and sleeping areas while also forming a sheltered external space.
Family: around 90–160 m². This is where you move into full family-home territory.
Three or four bedrooms. Potentially two bathrooms.
A proper utility.
Larger kitchen and living spaces.
More storage.
Our Combo Family layouts are designed for this range. At this size, the important question changes. It is no longer: “Is the house big enough?” It becomes: “Are we actually using every part of it?”
Smaller is cheaper more than once
Every additional square metre costs money when the home is built. But the cost does not stop there.
You also furnish it.
Heat it.
Light it.
Clean it.
Maintain it.
And eventually refurbish it.
That does not mean everyone should buy the smallest possible home. It means unused space has a cost. Often, the same budget spent on a better kitchen, improved finishes, solar PV, battery storage or a more comfortable living area will improve everyday life more than another room that spends most of the year empty.
Design for the next ten years
Choosing purely for today can be too short-sighted. But designing around every possible future scenario creates the opposite problem. The better question is:
What is realistically likely to happen in the next ten years?
Children may grow.
Working patterns may change.
You may need another bedroom.
Or you may need fewer.
A good home should accommodate realistic change without forcing you to pay now for every hypothetical possibility.
Layout beats square metres
Two houses can both be 80 m² and feel completely different. One can feel open, calm and spacious. The other can feel cramped. The difference is usually not the number.
It is:
- where the windows are;
- how furniture fits;
- whether storage is built in;
- how much area is lost to corridors;
- whether doors interrupt furniture layouts;
- how living and sleeping spaces relate to each other.
That is why we recommend looking at the actual floor plan rather than choosing a home purely from the total m². Good design makes square metres work harder.
Walk through one before deciding
Floor plans help. But walking through a real home changes your perception of size very quickly.
Rooms that look small on a drawing can feel generous in reality, particularly when they have good glazing, ceiling height and efficient furniture layouts. Our show home allows customers to experience the space before making a decision. It is often easier to decide whether you need another 10 or 20 m² after physically standing inside a well-planned home.
The simple rule
Do not ask: “How big a house can I build?” Ask: “What is the smallest house that gives us everything we genuinely need?” Then make those spaces better.
Better kitchen.
Better living room.
Better storage.
Better energy performance.
Better outdoor connection.
That is usually a smarter investment than simply buying more floor area.
Frequently asked questions
What size house does a family of four need?
There is no single correct number, but around 90–130 m² can accommodate three bedrooms, family living space, storage and potentially two bathrooms very comfortably when the layout is efficient.
Is 45 m² enough for two people?
It can be. A properly planned 45 m² home can include a full kitchen and living area, separate bedroom, bathroom and useful storage. The key is efficient planning rather than trying to squeeze a large-house layout into a small footprint.
Should I build bigger now in case I need the space later?
Only if the need is realistic. Building around a possible requirement fifteen years away can mean paying for unused space for a very long time. Plan for the life you can reasonably see ahead.
What matters more: floor area or layout?
Layout. A well-designed smaller home can feel substantially better than a larger home with wasted circulation, poor storage or awkward room proportions.
How do I choose between two TheHouz sizes?
Start with the rooms you genuinely need, then compare the floor plans rather than only the total area. If you are deciding between two models, tell us how many people will live in the home and how you use your space. We can help you identify which option actually suits you rather than simply recommending the larger one.