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Joey van der Hart
Live direct 06 - 29 08 07 57
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Online
Joey van der Hart
Live direct 06 - 29 08 07 57
Home extension for extra space that truly fits your house
Do you want to expand your home with a new space? With an extension, you create extra square meters that connect to your house and the way you want to live. Think of a spacious kitchen-diner, utility room, home office, playroom, or other extension at the rear or side of the home.
Van Der Hart Timmerwerk takes care of your home extension from preparation to finishing. We combine the structural work with our own carpentry and ensure that all parts fit together seamlessly. This gives you a single point of contact and saves you from having to coordinate the various tasks yourself.
- Custom home extension for your property
- Construction and carpentry handled from start to finish
- A single point of contact during the project
- Clear agreements regarding planning and execution
More space at home without having to move again
You live comfortably, but notice that your home is just a bit short on space. Perhaps a good workspace is missing, you want more room around the kitchen, or you need a practical utility room. Building an extension to your house can then be a way to make your current home better suit your daily life.
After completion, a good extension does not feel like a separate part that was later added to the house. The proportions, facade, window frames, materials, and connection to the existing home must together form a single, cohesive entity. That is why we look not only at how much extra space you want, but also at how that space can be used best.
From the initial idea to the actual construction, we think along with you about a solution that is technically feasible and matches the look and feel of your home.
What can you do with an extension to your home?
Every home and housing wish is different. That is why, when building an extension, we do not work from a standard solution, but look at the extra space you want to add and how it logically connects to your home.
Building a kitchen-diner extension
Do you want to make the kitchen a central place in the home? An extension creates space for, for example, a larger kitchen unit, cooking island, and long dining table. In doing so, we look at the walking space, natural light, and connection with both the existing house and the garden.
Building a utility room
A utility room provides extra practical space without sacrificing the living room or kitchen. Think of a permanent spot for a washing machine and dryer, groceries, shoes, coats, or household appliances. We ensure that the space connects logically to the rest of the home.
Building a home office or playroom
Don't you have any room left inside? An extension can be set up as a quiet home office, playroom, or multifunctional space. This way, you add a full-fledged room without completely changing the existing layout of the house.
Extension to the side of the house
For corner houses, semi-detached houses, and detached houses, there may be space next to the house for an extension. Depending on the available space, this can be used to create, for example, a kitchen, office, storage room, or extra living space. We will assess on-site which solution best fits structurally and practically.
A light extension with a lot of glass
With large windows, French doors, or a wide sliding door, an extension can bring in a lot of natural light. This not only creates extra space, but also a stronger connection between indoors and outdoors. Together we will determine how much glass suits the look, location, and use of your extension.
A custom extension for your home
No home is the same, which is why we do not build an extension from a standard solution. The available space, the construction of the house, the desired layout, and the appearance together determine how the extension will be executed.
We discuss, among other things, the dimensions, position of windows and doors, facade finishing, roof construction, and connection to the existing house. Do you want the extension to blend in with the original house as much as possible? Or should it be clearly visible that a modern addition has been made? Both can serve as the starting point for the design.
Wood details can also be custom-made within the project. From finishings to exposed woodwork: our carpentry we will include this directly in the execution, so that construction and finishing align properly.
What is the difference between an extension (aanbouw) and an extension (uitbouw)?
The terms extension and outbuilding are regularly used interchangeably in practice. However, an extension often means that a new section is added to the existing home. This can be, for example, a utility room, home office, garage, or another new space.
With an extension, the emphasis is more often on enlarging a space already present in the home, such as lengthening the living room or kitchen. Do you mainly want to make an existing living space larger? Then also view our options for a home extension.
Which term ultimately fits best is less important for the execution than your wishes and the existing situation. We therefore first look at what you want to achieve and then determine which architectural solution fits that best.
What customers say about us
An extension is a major change to your home. You want to be able to rely on careful work, clear agreements and a direct line of communication throughout the entire project. That is why we like to let our customers tell you themselves how they experienced working with Van Der Hart Timmerwerk.
Geplaatst op Google![]()
MikeTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Super tevreden over Van der Hart Timmerwerk! Vanaf het eerste contact met Joey en Lindsey was alles gewoon duidelijk en goed geregeld. Zeker een aanrader!Geplaatst op Google![]()
Linda BijlTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Joey heeft deze zomer bij ons de opbouw verzorgt. De communicatie was strak, helder en mede dankzij zijn goede adviezen en meedenken in de beste oplossingen, is het resultaat fantastisch mooi geworden. Joey komt zijn afspraken netjes na, heeft echte vakmensen in dienst en doet er alles aan om tot het meest optimale resultaat te komen. En dat alles tegen een eerlijke prijs. Dat kom je niet zo vaak meer tegen, chapeau!Geplaatst op Google![]()
Alex BerendsenTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Ik ben zeer tevreden wat Joey vd Hart heeft opgeleverd (tuinhuis en leefruimte buiten) en hoe de samenwerking is verlopen. Heel flexibel en hele robuuste oplossing. Vakmanschap en hoge kwaliteit.Geplaatst op Google![]()
Tal AmirTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Top craftsmanship by top professional. Only compliments. Highly recommended.Geplaatst op Google![]()
W.A. BomgaarsTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Zeer goede ervaringen met dit bedrijf. Vakmanschap met initiatief. Kunnen dit bedrijf van harte aanbevelenGeplaatst op Google![]()
MAKSIM SERGEJEVICHTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
We zijn erg blij met ons project – 'Een berging met een naastgelegen Overkapping'. Ik kan alleen de positieve punten opnoemen. Joey is erg punctueel, netjes, transparant en zeker professioneel in zijn taak en tevens een harde werker. Joey reageert snel en is ook een meedenker (wat erg fijn is) en ons tot veel meer creativiteit en slimme (technische) oplossingen heeft gebracht. In het kort – topvakman ! Dit zal zeker voor ons niet het laatste project zijn. Zeker een aanrader!Geplaatst op Google![]()
Justin DekkerTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Fijne gozer, met goeie prijzen en netjes werk. Wij hebben ons veranda door Joey neer laten zetten en hij heeft ons hierin goed geadviseerd. Het resultaat is erg mooi!Geplaatst op Google![]()
M VhTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Joey is een fantastische timmerman die echt de tijd en moeite neemt om het project tot iets moois te realiseren. Is altijd bereikbaar voor raad en daad!Geplaatst op Google![]()
Tim van BeekTrustindex verifieert dat de oorspronkelijke bron van de recensie Google is.
Vakbekwame timmerman met een ontzettend goed oog voor detail!Google waardering: 5.0 van 5, gebaseerd op 24 recensies
Your home extension arranged from foundation to finish
Building an extension involves much more than just putting up walls and a roof. The new construction must be connected to the existing home, and all components must connect technically and practically.
Van Der Hart Carpentry can take care of the various tasks within your project. Depending on the design and the existing situation, your extension may consist of, among other things:
- Preparatory and construction work
- Earthwork and foundation
- Construction and structural framework
- Roofing and cladding
- Breakthrough and connection to the existing house
- Installation of window frames, windows and doors
- Insulating the new space
- Facade finishing and cladding
- Carpentry and custom work
- Interior finishing of the extension
Do you have larger plans for the rest of the house besides the extension? Then we can combine work where possible within one complete home renovation. You have a single point of contact and avoid having to coordinate different parties yourself.
Online
Joey van der Hart
Live direct 06 - 29 08 07 57
Prefer to receive a call back?
How much does a house extension cost?
The costs of a home extension vary greatly per house and design. The dimensions naturally play a role, but the foundation, construction, amount of glass, material choice, and desired finish also influence the final investment.
For example, a compact utility room requires a different design than a wide extension with large window frames, custom work, and a completely finished interior. That is why we do not work with a single standard price that ultimately says little about your situation.
During a site visit, we will inspect the home and discuss what exactly you want to have built. Afterward, we can clearly outline the necessary work and you will receive a proposal that aligns with your plans.
What determines the price of an extension?
Among other things, these choices affect the costs:
- The length, width, and height of the extension
- The type of foundation
- The required supporting structure
- The size of the opening into the dwelling
- The number and type of window frames
- The amount of glass
- The chosen roof and facade finish
- Insulation and material choices
- The desired finishing level within
Do you need a permit for an extension?
An extension can be built without an environmental permit under certain conditions. Whether that is possible for your home depends, among other things, on the location on the plot, the dimensions of the extension, the type of home, and the rules that apply at your location.
Furthermore, building without a permit does not mean you can build without building regulations. An extension that does not require a permit must also comply with the applicable technical requirements. Depending on the plan, structural calculations and architectural drawings may therefore be necessary, for example.
Through the Permit Check of the Environment Desk, you can check which rules apply to your address and construction plan. During the preparation, we will look together at which steps are needed before we can place your extension.
See what we made for others
No project is the same, so we always deliver custom work. From complete renovations to refined patio roofs and custom woodwork projects: view a selection of our work and get inspired for your own plan.
Project in Amstelhoek
- August 30, 2026
- Garage extension
Project in Amsterdam
- August 17, 2026
- Roof extension
Project in Amstelveen
- April 7, 2026
- Garden shed
This is how the construction of your extension proceeds
An extension requires good preparation and clear coordination between the various tasks. That is why we discuss your wishes in advance, inspect the location, and clearly explain what is needed to realize the extension. Throughout the entire process, you will have a single point of contact and know exactly where you stand.
Step 1 – Application and introduction
You let us know what you have in mind, big or small. We will contact you to discuss your wishes, ideas, and expectations.
Step 2 – Site Visit
We will visit you to inspect the home and the available space. This gives us a clear picture of the current situation and allows us to provide targeted advice on the possibilities.
Step 3 – Proposal and non-binding quote
Based on your wishes and the situation, we will create a clear proposal. You will receive a non-binding quotation in which the discussed work is clearly described.
Step 4 – Design and preparation
Following approval, we will elaborate the plans further. We will coordinate the construction, materials, schedule, and necessary preparations with you, ensuring everything is clear before we start.
Step 5 – Construction and finishing
Our team realizes the expansion and ensures that the various activities are well-coordinated. During execution, we will keep you informed of the progress.
Step 6 – Delivery
Upon completion, we will review the work together. We will check the execution, discuss any points of attention, and ensure a neat delivery of the new space.
Why have your home extension built by Van Der Hart
An extension changes not only the exterior of your home. During the work, alterations are also made to, and sometimes partially within, the existing house. In that case, it is nice to know who is responsible, when work is being carried out, and who you can turn to with questions.
Van Der Hart Carpentry combines architectural knowledge with craftsmanship in carpentry and custom work. As a result, we can coordinate various components within a single project and avoid unnecessarily dividing work among different parties.
From the initial consultation to completion, you have a single, dedicated point of contact. We establish clear agreements in advance, keep you informed during the work, and ensure that your extension not only provides extra space, but also seamlessly connects to your existing home.
This is why customers choose Van Der Hart Carpentry:
- Craftsmanship in construction and carpentry
- An extension tailored to your home
- Custom work in construction and finishing
- Clear agreements and direct communication channels
- Various activities within a single project
- Single point of contact from application to delivery
Frequently asked questions about a home extension
How large may an extension to a home be?
That depends on the home, the available space on the plot, and the rules that apply to your location. It also makes a difference where you want to place the extension. We therefore look at each home individually to see what is technically possible and which rules apply to the plan.
How long does it take to build an extension?
The construction time depends, among other things, on the scale, construction, material choices, and desired finish. Preparatory work can also influence the total lead time. Before the start of the project, we make clear agreements regarding the schedule.
Can you add an extension to any home?
Not every home or location offers the same possibilities. The available space, foundation, existing structure, and local regulations all play a role. During a site visit, we can assess which solutions suit your home.
Can you completely finish an extension?
In addition to the construction work, we can also include various finishing components. We will agree with you in advance on the exact work that will be part of the project, so that it is clear what is and is not covered by the quote.
Can we continue living at home during the construction of the extension?
That is possible in many situations, but depends on the scope of the work and the connection to the existing home. Especially around the breakthrough, there may be more temporary disruption. We discuss in advance what you can expect during each phase.
More plans for your home?
Perhaps you want to renovate other parts of your home in addition to the extension. Van Der Hart Carpentry can coordinate various construction and carpentry work within a single project.
Expand
Do you want to make an existing living room or kitchen larger? Check out the possibilities for a home extension.
More information
Complete renovations
Combining multiple spaces or tasks into one complete renovation project.
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Facade cladding
Give the new or existing facade a sustainable and characterful finish.
More information
Carpentry
Custom woodwork for the construction, finishing, and details of your home.
More information