CBS Renovation

CBS RENOVATION

Home extension

Construction of a home extension in the Netherlands

(Hilversum, Amersfoort, Almere, Utrecht, Amsterdam)

A magnificent design, thoughtful architectural solution and quality construction of your home extension.

CBS Renovation offers you a complete concept consisting of design, architectural support, implementation and advice throughout the project. The space of your living space can be enlarged making it more spacious, lighter and multifunctional. Our team of designers, architects and builders will make every effort to translate your wishes into reality, at very competitive prices, with high quality and on time.

Our services

Our company provides a wide range of construction and renovation services, including construction of your home extension. In general, the construction process starts with clarification of the customer’s wishes, during which we also provide an advice on construction and use of materials. Based on the received and agreed information, we can develop a design and submit documents for obtaining a building permit, if necessary. Afterwards, we start constructing your extension and possibly renovating your home.

One of the home extension project accomplished by our company. Indoor and outdoor extension views.

Design and building permit

We offer a variety of home extension projects with a choice of roofing materials, including real tile roofing, rolled roofing materials and steel roofing panels. Based on your wishes, our team of experienced craftsmen will help you choose the models of windows, skylights and doors for your extension or home renovation, as well as the material for their manufacture (PVC, wood or aluminum). In addition, we will offer you options for flooring and underfloor heating, as well as exterior and interior finishing works. Building permit for the construction of extensions is not required in certain cases, however, if needed, we can provide the necessary assistance by drawing up architectural drawings, applying and contacting the municipal authorities.

Home extension The Netherlands

Construction of a home extension

In most cases, the construction of an extension consists of the following stages, which may differ depending on the choice of the type of extension and materials, as well as wishes of the customer:

  • Dismantling and preparatory work
  • Laying the foundation (creating a strip foundation or driving-in of piles and then concrete pouring)
  • Basement insulation and ventilation
  • Concrete floor construction
  • Reinforcing facade and installing steel trusses and columns
  • Fire protection of steel beams and columns
  • Installing wooden door frames and windows
  • Installing drainage pipes for draining rainwater
  • Installing wooden frame walls and their insulation
  • Dry-lining with OSB and drywall
  • Masonry of exterior walls
  • Constructing a wooden roof structure and its insulation
  • Installing drywall on a wooden frame
  • Roofing works
  • Connecting the drainage system with drainpipes
  • Electric installation work
  • Installing heating radiators
  • Plastering work
  • Laying laminate and installing skirting boards
  • Painting walls and ceilings of the extension

The cost of constructing a home extension

Undoubtedly, when you are planning to expand your living space, its cost plays an important role.

Based on our experience, we can conclude that the approximate cost of the construction of a home extension, including materials and VAT, is € 600 – 1200 per m3.

The assessment of costs is influenced by such factors, like area of the extension and its model; quantity, size and material of windows and doors; roof and foundation, underfloor heating, as well as the types of lighting and the choice of finishing materials.

Based on your budget and wishes, you can choose an optimal extension model and selection of materials. Our company will be able to help you with your choice of extension and make an estimate of the cost of work and materials.

Some of the benefits of working with us

  • Increasing a value of your home
  • Creating a bright living and functional space area
  • Use of the highest quality materials
  • Complex construction by one company
  • Maintenance and architectural supervision
  • Warranty for the work performed
  • Competitive prices
  • Completion of work on schedule
  • A wide variety of designs tailored to your individual needs


Frequently asked questions and answers

We make every effort to ensure that information about our services is accessible and understandable. On this page you will find the most frequently asked questions. If you have any questions, please contact us by using the contact form.

Home extensions up to 4 meters are generally not subject to a permit. In the meantime, you can apply for a permit if your home is located in a protected urban area, is a municipal or national monument or has a municipal ordinance. Our company can request for free the information about existing restrictions for you.

Our company works together with architectural firms that can apply for an environmental permit on your behalf. The cost of this service will be discussed with you in advance.

As a rule, permission for the construction of an extension is not required, but it is advisable to consult before the start, because the extension may affect their interests. If your home is affiliated with an Owners’ Association, prior permission from the other members of the Association (VvE) is required.

The timing of the work depends on the duration of the process of filing and reviewing the application for a building permit. The application is considered by the municipality within 8 weeks, which can be extended by the municipality once for 6 weeks. We can’t start construction until we obtain the permission. When ordering new windows, please note that manufacturing and delivery takes 5-8 weeks.

We are happy to make a cost estimate without any obligation

Voorbeelden schilderwerkzaamheden aan woningen

Twijfelt u of CBS Renovation de juiste partij is om schilderwerkzaamheden uit te laten voeren? Laat u zich dan inspireren door onderstaande projecten die we voor andere opdrachtgevers hebben gerealiseerd:

We are ready to start your project

CBS Renovation offers a flexible architectural and interior design services,
offering a tailored approach to complement your vision for your home improvement project.

We are happy to make a cost estimate without any obligation

Application Form

Feel free to write down what you are interested in and how we can be useful to you.
Please fill out the form. We will reach out to you within 24 hours.

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