MORE LIVING SPACE STARTS WITH YOUR IDEA. DESIGN YOUR EXTENSION
Concept of a bright kitchen extension with large glazed doors opening onto the garden

A long table. The garden closer.
And finally, room for everyone.

More home.
More life.

Design your extension Your dimensions. Your style. Your living space.

Prefab extension

From a lovely home to one where everything fits. More room for cooking, playing and being together.

Design impression
Configure your own in 3D Understand choices and costs From first idea to a workable plan
MORE ROOM STARTS HERE

Stay where you feel at home.
Make room for what's next.

A dining table for everyone, a kitchen with room to work or a downstairs bedroom. Find the extension that solves your everyday problem and decide how much garden to keep.

Space for work, guests or an extra floor, too.Explore all possibilities
YOUR IDEA, BROUGHT TO LIFE

That extra bit of home.
Design it yourself.

Change the width and depth, choose a facade and try different doors or a rooflight. The 3D view and estimate update with your choices. Save two designs to compare them in your own time.

  • See your dimensions directly in 3D
  • Compare facades, frames and rooflights
  • Save your choices and request a tailored quote
Start designing

No commitment. Get started straight away.

Design impression of a prefab extension with black sliding doors
Your extensionMade around you.
Design impression
Concept of a shared meal in a spacious kitchen and dining areaDesign impression
A HOME THAT GROWS WITH YOU

Moving house?
Perhaps you
don't have to.

A kitchen for long evenings. A quiet workspace. Or a bedroom and bathroom downstairs. Extra space matters when it makes every day better.

With prefab construction, much of the extension is prepared in advance. On site, the focus is on foundations, the connection to your home and careful finishing.

How prefab extensions work
FROM WISH LIST TO LIVING SPACE

A clear plan.
From the first idea to coming home.

See the full process
01

Your wishes

Choose dimensions, appearance and layout. The configurator makes your first idea tangible.

02

The complete picture

A site survey checks the house, access, ground conditions and connections. This provides the basis for a complete quote.

03

Well prepared

After approval come the final design, required checks, scheduling and preparation of the prefab elements.

04

Room to live

Foundations, installation and finishing come together. At handover, you review all the agreed details.

CHOOSE WITH CONFIDENCE

Beautiful outside.
Considered inside.

The right extension suits your house and the way you live. From the first material choice to the last light fitting.

A style that fits

Brick, timber or low-maintenance cladding. Discover how a material changes the character of your home.

Read more

Light in the right place

Sliding doors, French doors or a rooflight: choose daylight with privacy and summer heat in mind.

Read more

Make space work harder

External dimensions are only the beginning. Think about circulation, furniture, the connection to your living room and space in the garden.

Read more
Design impression of a timber garden room in a green garden
A FRESH LOOK AT YOUR HOME

What would you do
with more space?

Find your inspiration
Design impression
GOOD TO KNOW

The questions you've
probably already asked.

All the answers

MORE LIVING SPACE. WHAT COULD IT ADD?

More space.
More value too?

See how much internal space your extension adds and compare three possible value scenarios with your total building budget.

Calculate space and possible value
EXAMPLE CALCULATION6 × 3 m

18 m² externally · approximately 14.58 m² internally with the assumed wall thickness.

How to calculate added living area
YOUR NEIGHBOURHOOD. YOUR NEXT CHAPTER.

Your street. A bigger home.

What do housing statistics tell you about your neighbourhood? Explore local data, ground considerations and the value of additional living space.

Explore your area
AmsterdamRotterdamUtrechtEindhovenGroningenMaastrichtHaarlemNijmegen
3,500locations
342 municipalities · 3,158 residential districts

Practical extension guides

All extension articles
Extension blog

What will your extension cost? From size price to full budget

An 18 m² price seems easy to compare, but two figures may include different work. Three size examples and a clear sequence show what the estimate contains and what still needs discussion.

Read the article
Extension blog

Comparing extension quotations: seven questions to ask

The lowest price matters only when the scope matches. These seven questions reveal differences in dimensions, finishes, work and responsibilities before you sign.

Read the article
Extension blog

From external size to living space: what really fits?

An extension covering 18 m² externally is not an 18 m² room. Three examples separate walls, furniture and circulation to help create a realistic layout.

Read the article
YOUR NEXT CHAPTER

All that's left
is to dream.

Choose dimensions, compare finishes and save your design. Start a conversation about your extension with a clear picture and an explained cost estimate.