Sanne
Clear communication about both the rates and the way of working. The cause of the leak was found quickly and the next steps were explained clearly.
House extensions in Amsterdam
More space without moving house. Klusbedrijf MSZ builds extensions all over Amsterdam, from Centrum and West to Noord and Zuidoost. We do everything, from the foundation to the flat roof and the sliding doors, and you get a quote with a fixed price beforehand.
Almost nine in ten homes in Amsterdam are flats.
Feel free to send us a photo on WhatsApp first — that way we can often assess the problem straight away.
5.0 on Werkspot
225+ reviews
Available 24/7
Nights and weekends too
Registered with the KvK
KvK 87844508
Family business
From Almere, since 2022
Prices up front
No surprises
- IN AMSTERDAM
Extensions in Amsterdam: ground, space and rules
Amsterdam has more than 474,000 homes. 87% are flats, 70% are rented (40% from a housing association) and 80% were built before 2000 (CBS, 2023). With 13% single-family homes, a garden is the exception rather than the rule in Amsterdam; an extension or covered patio usually concerns a ground-floor home with a garden. Amsterdam is built on soft peat and clay, and many older buildings stand on wooden piles. Many Amsterdam homes were built before 1960. Lead was banned in 1960, but checks in 2021 still found lead in 3,987 of the 87,312 pre-1960 homes of Amsterdam housing associations, mostly in Amsterdam-Noord.
With a building on wooden piles, an extension must not load the existing foundation. So we only decide on the foundation after investigating the ground and the building.
See also all about house extensions.
- NEAR YOU
An extension anywhere in Amsterdam
We build extensions in every district of Amsterdam, from Centrum and West to Noord and Zuidoost. From Almere we drive there via the A6 and the A1. For an extension we like to come and have a look first, so that the quote matches your home.
- Centrum
- West
- Nieuw-West
- Zuid
- Oost
- Noord
- Zuidoost
- Weesp
- Diemen
- Amstelveen
A visit in Amsterdam comes with one fixed call-out charge: €42.35 incl. VAT (€35 excl. VAT). You know the amount before we set off; it never appears afterwards as an extra on the invoice. If we do several small jobs in one visit, we only charge the call-out charge once.
Map of Amsterdam
This map comes from Google Maps. Only when you click the button is the map loaded and does Google receive data, such as your IP address.
Or open Google Maps in a new tab- REVIEWS
What customers say about us
All our reviews are on Werkspot, an independent platform. They come from real customers and we cannot change them ourselves. From Amsterdam, Amstelveen and Diemen we have already received 71 reviews on Werkspot, more than from any other place. Frank from Amsterdam wrote about his toilet in January 2024: “Done quickly and expertly, in consultation and exactly as I wanted.”
Reviews translated from Dutch.
- CUSTOMERS IN AMSTERDAM
What customers in Amsterdam say
Of the 71 Werkspot reviews from Amsterdam, Amstelveen and Diemen, 22 were about a leak or pipework, 18 about the toilet, 15 about the shower or bath and 10 about a tap. Werkspot is an independent Dutch platform. A few reviews about jobs like this:
Barry from Amsterdam, October 2024: “Helped well. Always communicated clearly. Kept his appointments, thought along with us.”
Kevin from Amsterdam, January 2024: “The job was done quickly and expertly.”
Customer from Amsterdam, August 2023: “Grouted the bathroom, fitted an under-counter fridge and replaced a trap. Simply does exactly what he promises.”
- FREQUENTLY ASKED QUESTIONS
Questions about an extension in Amsterdam
Is your question not listed? Feel free to call or WhatsApp us, also outside office hours.
Do I need a permit for an extension in Amsterdam?
Often not at the back, but that depends on the size and position. Amsterdam has extra rules for listed buildings and protected cityscapes. Always do the permit check on the Omgevingsloket first.
What should I watch out for with the foundation in Amsterdam?
Amsterdam is built on soft peat and clay, and many older buildings stand on wooden piles. We match the foundation to the ground and to the existing home.
Which jobs do you do most often in Amsterdam?
Of the 71 Werkspot reviews from Amsterdam, Amstelveen and Diemen, 22 were about a leak or pipework, 18 about the toilet, 15 about the shower or bath and 10 about a tap.
An extension in Amsterdam?
Send us a photo of the back of your house and tell us the measurements you have in mind, on WhatsApp or through the quote form. We will make an appointment and give you a quote with a fixed price.
