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Frankfurt collects data for new rent index – this is how you can participate!
Frankfurt am Main is starting a large-scale data collection for the 2026 rent index to ensure fair rental conditions.
Frankfurt collects data for new rent index – this is how you can participate!
The city of Frankfurt am Main has started a remarkable project that is important for many tenants and landlords. On July 1, 2023, the city began collecting data for the new qualified rent index 2026. Around 10,000 randomly selected households are contacted and asked to provide information about their living conditions. This survey is essential to determine the local comparative rent and to specifically support legal regulations such as the rent cap. Rhein Main Verlag reports that participation in the survey is required by law and failure to do so may result in a fine.
What exactly is being recorded? The data collected provides a realistic picture of the Frankfurt housing market by being evaluated anonymously. Marcus Gwechenberger, Head of Planning and Housing, emphasizes the importance of the rent index for fair tenancies. Participation takes place in several steps, starting with an online questionnaire and, if necessary, personal interviews. The city commissioned the Housing and Environment Institute from Darmstadt and the IFAK Institute from Taunusstein to prepare the detailed report.
Rent index 2024 and market development
The current Frankfurt rent index has been valid since June 1, 2024. It represents a qualified rent index in accordance with Section 558d of the German Civil Code (BGB) and gives renters and landlords a basis for determining appropriate rent levels. It is based on a survey of over 3,400 households and takes into account rents that were newly agreed or changed in the last six years. In addition, additional data was collected from around 3,500 tenant households in order to reflect developments on the market. This provides a valuable tool for better understanding rental price trends. Frankfurt.de lists the cap limit of a maximum of 15 percent rent increase within three years as well as the rent cap, which defines re-letting rents that may not be more than 10 percent above the local reference rent.
Rental prices at a glance
According to current data, the average rent in Frankfurt am Main is EUR 17.15/m². Depending on the number of rooms, the prices are staggered differently:
- 1-Zimmer-Wohnung: 19,25 EUR/m²
- 2-Zimmer-Wohnung: 16,86 EUR/m²
The following average prices were determined for the different apartment sizes:
| Apartment size | Average price (EUR/m²) |
|---|---|
| 20-35 m² | 20.16 EUR |
| 35-45 m² | 17.17 EUR |
| 45-50 m² | 17.14 EUR |
| 60-75 m² | 16.02 EUR |
| 75-85 m² | 16.63 EUR |
| 85-100 m² | 16.80 EUR |
| 100 m² | 17.75 EUR |
These numbers come from the Rent index table and make it clear that rental prices for small apartments have increased in recent years. The rent index plays a central role in creating transparency about rent prices in the city. Factors such as year of construction, equipment, location and infrastructure are taken into account.
So it's a good time for Frankfurt residents to find out about developments on the rental market. Participation in the current survey is not only important for the new rent index, but also for everyone who wants to live fairly in the city. For further information, please visit the website frankfurt.de/mietspiegel-ernahme and the Housing Office on 069/212-77088.