Ideal House
06 34 71 49 09
Service 02

Extensions in Rotterdam: more space without moving

A rear extension or a dormer often gives you more than moving house would. Ideal House handles the complete shell and fit-out: foundations, brickwork, steel structure, frames, roofing and the entire interior finish.

  • Free survey
  • Fixed price up front
  • Our own craftsmen
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Extension with black steel frames and a glass façade, with a timber deck on the garden side
What we do

What's included

  1. Foundations and floor, including insulation
  2. Brickwork, lintels and steel structure
  3. Frames, sliding doors and roof windows
  4. Flat roofing and watertight connections
  5. Insulation, walls, ceilings and plastering
  6. Advice on permit-free building or the planning permit

Good to know

An extension turns a cramped living room into a spacious, light-filled kitchen-diner. Think of an extension with large sliding doors to the garden, a roof light that brings daylight deep into the house, or a garden room with steel frames. Because we build both the shell and the fit-out ourselves, everything fits together seamlessly.

Many rear extensions in the Netherlands are permit-free, but that depends on the size and your plot. We check this during the site survey. If a permit is required, we help with the drawings and the application. Most of the work happens outside; we only break through to the existing house at the end, keeping disruption to a minimum.

Our approach

How we go about it

  1. 01

    Feasibility

    We look at the structure, the boundary and whether your plan can be built without a permit.

  2. 02

    Drawings and quote

    Where needed we bring in a structural engineer for the calculations.

  3. 03

    Shell

    Foundations, brickwork, steel and roof. The shell is made watertight.

  4. 04

    Fit-out

    Insulation, walls, electrics, plastering and floor finishing.

From foundations to handover

How an extension takes shape

  1. Reinforcement and formwork of the foundation for a new extension01

    Foundations

    Reinforcement, formwork and an insulated floor as a solid base.

  2. Extension shell with timber roof beams and scaffolding02

    Shell

    Brickwork, steel and roof beams. The structure takes shape.

  3. Extension with newly installed white frames and French doors03

    Frames & roof

    Doors and roof windows in, roof on: the extension is watertight.

  4. New rear extension with large sliding glass doors on a Rotterdam terraced house, lit up in the evening04

    Handover

    Fit-out, electrics and finishing. Ready to live in.

In practice

Work we have delivered

New rear extension with large sliding glass doors on a Rotterdam terraced house, lit up in the evening Extension with sliding doorsExtensions Bright kitchen-diner in an extension with a roof light, sliding glass doors and herringbone floor Kitchen-diner with roof lightExtensions Rear extension with glass façade, patio and view of the living room Extension with glass façadeExtensions Brick extension with two sets of steel doors and a new patio Extension with steel doorsExtensions Modern extension with light timber cladding and large windows Extension with timber claddingExtensions Extension with anthracite cladding, brick plinth and white window frames Anthracite extensionExtensions
Questions

Frequently asked questions

Do I need a permit for an extension?

That depends on the size and position on the plot. Many rear extensions are permit-free. We check this during the survey and, if a planning permit is needed, we help you with the application.

Can I stay at home during construction?

In most cases, yes. The extension is largely built from the outside. Only once the shell is watertight do we break through to the house. We put up dust screens and tidy up every day.

Who does the structural calculations?

Where needed we bring in a structural engineer to calculate foundations and steel. Those costs are included in the quote, so you don't have to find anyone yourself.

Other services

Also useful for your project

All services
  1. 03

    Interior & exterior painting

    Smooth interior paintwork and durable exterior maintenance painting.

    White room with smooth plasterwork, painted walls and a roof light, ready for handover
  2. 04

    Tiling & masonry

    Perfectly aligned tiling and expert brickwork, down to the last joint.

    Bathroom with floating double vanity and illuminated arched niches
  3. 05

    Plumbing & underfloor heating

    Water supply, drainage, central heating and underfloor heating, neatly concealed and leak-free.

    Modern toilet with wall-hung WC, hand basin and illuminated niche in large-format tiles
Free quote

Your extension in good hands?

Tell us about your plans. We visit for a free survey and you receive a no-obligation quote, usually within two working days.

Call us06 34 71 49 09 WhatsApp · send photos06 34 71 49 09 Emailidealhousenl@gmail.com
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