Renovation Funds check
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Houzy Renovation Funds CalculatorCondominiums: calculate costs and contributions

Do you want to check the Renovation Funds for an under- or over-coverage or buy a condominium? Houzy’s renovation calculator calculates your annual contribution to the fund as well as the renovation costs for your apartment and the common components of the condominium.

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expert-based analysis model

with just a few clicks to the online result

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Condominium – The first digital contribution calculator

With just a few clicks you will receive a recommendation on the amount of your deposit in the renovation fund.

Optimal contribution amount
Check renovation needs and costs
Optimal fund amount
Calculate required contribution margin
Result of the renovation fund analysis

Houzy Contribution Calculator – How it works


Describe property

With few information about the object, the service life of the private and common components is analysed and the renovation timing calculated.


Estimate renovation costs

The key data on the property are compared with thousands of comparative data and thus estimated the approximate costs.


Test current coverage

Based on the stock of the Renovation Fund and your annual payment, the proportion of the renovation costs that will be covered in the coming years is calculated.


Discover optimal contribution

Houzy proposes the optimal fund amount and directly suggests the necessary individual contribution.

Calculate Renovation Fund contribution online – Your benefits

Clarity on costs

You will know clearly which renovation costs are related to your own apartment and which ones fall on the community. The renovation costs and dates are listed in a clear manner. This will prevent debates and uncertainties about future renovations.

Prevent financial bottlenecks

The overview of the costs incurred and the calculation of necessary deposits in the Renovation Fund prevents unexpected financial bottlenecks. So you can easily optimize the budget planning of your owner community and prevent a loss of value of your property.

Data-based second opinion

There are many good reasons for paying more or less money into the Renovation Fund. If different owners and the administration have different opinions, a neutral assessment may be helpful. Sound analyses bring light to the dark and help to find a common denominator.

Easy, quick and free

Based on the calculated recovery costs and deposits, you have a sound basis for discussion for your next owner meeting. The calculation is also super fast and free of charge - even for your condominium owners community. You can easily share the report.

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This is what we stand for


We are an independent, young Swiss company and are financed by partners and investors. We develop all our tools ourselves - the results are based on Open Data.


Data security

Data security is our top priority. Your data will never be passed on to third parties without your permission. You always decide for yourself when you want to share what information with whom.

Certified experts

We exclusively work with selected and certified regional Swiss real estate experts and craftsmen in order to meet your quality requirements.

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Calculate the renovation costs and deposits to the renewal fund for your condominium.

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FAQs – Answers on Houzy

What happens to the data entered?

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Data protection and security are our top priority. That's why we leave nothing to chance. To ensure the protection of your personal data and secure data transmission, we work with the latest security technologies. Your data is stored in encrypted form in a computer centre that is certified with all current industry standards. Data is therefore only passed on to third parties if you request service offers via Houzy that require this. An example of this is when you actively contact one of our broker partners. You can find further information in our T&Cs under "Our privacy policy".

Why is the Renovation Calculator free of charge?

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Houzy is a young company and finances itself by brokering third-party services as well as through advertising partnerships with national and regional partners (however, you as a user always decide yourself when you want to share what and with whom and thus always retain data sovereignty). The use of our online Renovation Calculator and our platform is therefore permanently free of charge for you. If required, our experts will be happy to advise you personally in a second step. Suitable, regional craftsmen can also be contacted through us without obligation. If an order is placed, payment is handled directly with the craftsman.

What is Houzy?

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Houzy is a young Swiss PropTech company with one goal: Making homeownership simple. The platform integrates user-friendly online tools such as the property valuation, the renovation calculator or the property gains tax calculator, which help to optimally manage private property and save effort and costs in the process. The scope of Houzy is constantly being expanded. You can find out more under About us.

What should be considered when buying an apartment?

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Before buying an owner-occupied apartment, you should definitely take a look at the condominium regulations, because with the purchase you accept the regulations of this community. The resolutions and minutes of recent owners' meetings also provide important information about decisions, such as upcoming renovations. In addition, it should be clarified in advance what the status of the renewal fund is and the annual contributions of the condominium owners. Buying a condominium also means that you have to help finance all upcoming renovations. So if the roof is renovated a year after the purchase and there are no funds in the renovation fund, the new owner will be faced with major expenses. With the Houzy renovation and renewal fund calculator, such expenses and risks can be identified even before the purchase.

What "additional costs" do I have to pay as an apartment/condominium owner?

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The ancillary costs of an owner-occupied flat consist of costs for the owner's own floor unit and those for the common components. For the owner's own flat, costs are incurred for repairs and maintenance work, such as painting work on the owner's own four walls. These are fully borne by the owner. The common parts of the building, such as the roof, heating, façade, load-bearing walls, pipes as well as the caretaker and administrative expenses are managed jointly by the condominium owners' association and the maintenance costs are borne jointly. The law provides that these ancillary costs are distributed in condominium ownership in proportion to the value quotas. However, the amount of the ancillary costs of a condominium depends on the condition and quality of the building and the flat and thus varies greatly. As a guideline, most experts recommend including an amount of 0.75 to 1 per cent of the purchase price. However, this estimate does not include major repairs and renovations. Homebuyers can use the Houzy contribution calculator to find out before they buy what additional costs they will incur in the form of renovations and contributions to the renovation fund.

What is the optimal contribution to the Renovation Fund?

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In principle, there is no legal obligation for condominium owners to set up a renovation fund and thus no legally prescribed contribution amount. What is clear, however, is that if you want to prevent a reduction in the value of your condominium, you must keep your building in good condition and set aside reserves for renovation and maintenance work for your own flat and the common building. It is less clear how much should be paid into the fund. The guideline ranges from 0.3% to 1% of the purchase price. However, most experts agree on one point: many condominium associations pay far too little into the renewal fund. If the renewal fund is too low, it can quickly lead to financial bottlenecks and disputes in the condominium owners' association when a renovation project is necessary. Houzy therefore first analyses the renovation needs of the condominium's own and communal building components and calculates the renovation costs and timeframes using thousands of comparative data. Based on this differentiated cost estimate and additional information on the condominium unit, the required payments into the renovation fund can be calculated. The Houzy Contribution Calculator thus serves as an initial, data-based basis for discussion at the next owners' meeting.

What does special right mean?

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A condominium owner does not have sole ownership of his or her apartment, but a co-ownership right to the entire property, which is reflected in the value quota. However, there is a special regulation for one's own flat, cellar or attic, the so-called special right, which grants a privileged position. Similar to sole ownership, the special right offers freedom of design for the rooms concerned; the flat may be used, developed, converted or rented out according to one's own sense. In order for the special right to apply, a room must be closed and accessible through its own entrance. The special right is intended to ensure that floor units can exist independently of each other. Garden and parking spaces are therefore not eligible for special rights from the outset. The exact demarcation of the parts in the special right can be found in the declaration of the condominium ownership, which is often found in the regulations of the condominium owners' association. The special right does not include common parts such as the ground of the property or the foundation, the roof or the façade.

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