Tiny houses: property tax, residence tax and development tax

A tiny house costs less than a conventional house, but it does not necessarily escape local taxes in France. The answer depends neither on its size nor on its price, but on one key criterion for the tax authorities: can it be moved by normal means? This guide reviews the four taxes you need to know about, with the texts and figures in force in 2026.

What criterion decides how a tiny house is taxed?

For both property tax and residence tax, the tax authorities look at whether the dwelling permanently has means of mobility. The BOFiP (the official doctrine of the French tax administration) is clear on this:

• Property tax (taxe foncière): installations are taxable if they can be treated as buildings and cannot be moved by normal means. Caravans, among others, remain exempt.
• Residence tax (taxe d’habitation): caravans and mobile homes that permanently keep means of mobility allowing them to move under their own power or by simple towing are not taxable, whatever the conditions in which they are parked and used. The Conseil d’État (France’s highest administrative court) has ruled to this effect several times.

Being connected to water or electricity is not, in itself, enough to make a mobile tiny house taxable. Conversely, a house whose wheels or drawbar have been removed, that is set on foundations or incorporated into a permanent building, loses this status. The authorities assess each case individually, on the basis of a body of evidence.

Does a tiny house pay property tax?

• On wheels, movable by simple towing: no, it is treated as a caravan.
• Sited with no means of mobility, or on foundations: yes, it may be treated as a building and be subject to property tax on built property.

The owner of a new building used as a dwelling must declare it to the tax office within 90 days of completion, online via the “Gérer mes biens immobiliers” (manage my property) section. This declaration gives entitlement to a property tax exemption for the two years following completion (article 1383 of the Code général des impôts, the French general tax code). Note that the municipality can limit it to a fraction of the tax base, between 40% and 90%. Without a declaration in time, the exemption is lost.

The amount of property tax is calculated from the property’s cadastral rental value, multiplied by the rates set by the municipality and the inter-municipal authority. It therefore varies widely from one municipality to another. The bare land is in any case subject to property tax on unbuilt property, whether or not the tiny house is mobile.

What about residence tax?

Since 1 January 2023, residence tax on main residences has been abolished. It is still payable on furnished second homes and on certain vacant dwellings.

For a tiny house, this means:

• Main residence: no residence tax, whatever its status.
• Second home on wheels, movable by towing: no residence tax (means-of-mobility rule).
• Second home sited with no means of mobility: residence tax on second homes, possibly with a surcharge in municipalities that have decided to apply one.

Owners of built property must also keep the occupancy status of their property up to date on impots.gouv.fr, in the “Biens immobiliers” (property) service: in 2026, before 1 July, for the situation on 1 January.

When does development tax apply?

Development tax (taxe d’aménagement) is a one-off tax, paid when a building or a development requires planning authorisation (a prior declaration or a permit). It therefore mainly concerns:

• A tiny house set on foundations: the base is the taxable floor area, multiplied in 2026 by €892 per m² outside Île-de-France and €1,011 in Île-de-France, with a 50% allowance on the first 100 m² of a main residence.
• A pitch laid out for a caravan or a mobile home: flat-rate base of €3,000 per pitch.
• A pitch for a light leisure dwelling (HLL): flat-rate base of €10,000 per pitch.

This base is then multiplied by locally set rates: 1 to 5% for the municipal share (up to 20% in certain areas), at most 2.5% for the departmental share, and up to 1% for the region in Île-de-France. Buildings of 5 m² or less are exempt. For authorisations granted since 21 February 2026, the tax is paid in two instalments, 9 months and then 18 months after the authorisation is granted.

Example calculation, outside Île-de-France, for a 20 m² tiny house set on foundations as a main residence, with a municipal share of 3% and a departmental share of 2%: 20 m² × €892 × 50% = €8,920 base, i.e. around €268 for the municipal share and €178 for the departmental share. This figure is only an illustration: your actual rates are available from the town hall. The formalities are explained in our guide planning permission or prior declaration.

Is there still a tax on mobile homes?

No. The annual tax on land-based mobile homes (article 1013 of the CGI), which targeted caravans and mobile homes used as permanent housing, was abolished from 1 October 2019 by the 2019 Finance Act. Some websites still mention it: it no longer exists.

What if the tiny house is let?

Income from letting a furnished tiny house is subject to income tax, in the category of industrial and commercial profits (BIC), and short-term letting may involve collecting a tourist tax (taxe de séjour). The rules specific to letting, which changed in 2025, are explained in our guide to letting your tiny house.

How to avoid unpleasant surprises

1. Decide from the outset whether the house will remain mobile or be sited permanently: the choice has tax consequences, in addition to the planning rules (see tiny houses and the law).
2. Keep proof of mobility: a roadworthy trailer, drawbar, registration certificate.
3. Declare any new building within 90 days so as not to lose the two-year exemption.
4. Ask the town hall for the local rates of development tax and property tax before buying the land.
5. Include these taxes in your budget, alongside the other costs set out in our guide on the price of a tiny house.

Key points

• The key criterion is mobility: a tiny house that can be moved by simple towing escapes property tax and residence tax.
• Sited with no means of mobility, it may be taxed as a building.
• Residence tax now only applies to second homes and certain vacant dwellings.
• Development tax applies when siting requires authorisation: €892/m² outside Île-de-France in 2026, or a flat rate per pitch.
• The annual tax on mobile homes has been abolished since 2019.

Please note: this guide sets out the general rules, checked on the date shown. It is no substitute for personalised advice: local rules (the PLU or local urban plan, protected areas, risk zones) may be stricter. For a specific project, contact your town hall’s planning department or the ADIL (departmental housing information agency) in your département.