You have just finished building your house or expanding your home. Among the administrative formalities that follow, the Cerfa H1 form (n°6650) is the one that allows the tax administration to assess the cadastral rental value of your property. This value serves as the basis for calculating property tax. However, you need to know which service to send it to, within what timeframe, and through which channel.
Secure messaging or postal mail: which channel to choose for the H1 form
Until recently, the submission of the H1 form was almost exclusively done by mail. The situation has evolved. Several local tax services indicate that the form can now be submitted via the secure messaging of the impots.gouv.fr space. This channel has a direct advantage: it generates a dated acknowledgment of receipt.
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In case of a dispute regarding compliance with the legal deadline, this digital proof carries more weight than a simple postal receipt. The report from the Defender of Rights on dematerialized tax procedures, published in 2023, also mentions these changes in the practices of the DGFiP.
Specifically, to use this channel, log in to your Personal space on impots.gouv.fr, go to the “Write” section, and attach the completed H1 form as a PDF file. If you want to understand precisely where to send the cerfa H1 form based on your geographical situation, the recipient remains the same: the competent service linked to the location of the property.
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Postal mail is still valid. If you choose this route, send the form by registered mail with acknowledgment of receipt. The postmark serves as proof of compliance with the deadline.
Property tax service or SIP: to whom to address the H1 declaration
You have filled out the form, but the recipient’s address poses a problem. This is a common case, as the pre-filled H1 form does not always clearly indicate the competent service.
The normal recipient is the Property Tax Center (CDIF) to which the declared property belongs, not your personal residence. This distinction matters if you are building in a department different from where you reside.
A note relayed by the Departmental Directorate of Public Finances of Haute-Garonne in February 2024 provides a useful clarification: if you mistakenly send the H1 to your Personal Tax Service (SIP), it is now instructed to internally forward it to the competent property service. No penalty applies in this case, provided that the postmark or the date of digital submission respects the deadline.
To identify the correct property service, use the public finance services directory on the impots.gouv.fr site. Enter the municipality where the property is located (not your residential address), and the engine will direct you to the competent office.
Deadline for submitting the H1 form and risks in case of delay
The H1 form must be submitted within 90 days following the completion of the work. This deadline starts from the actual completion date, not from the date of receipt of the building permit or the date of moving in.
Why does this deadline matter so much? Because it conditions two things:
- The calculation of property tax on your new property, which starts from the year following completion
- Access to a temporary property tax exemption for new constructions, generally granted for the first two years
- The update of the cadastral rental value in the property database, which is also used for calculating other local taxes
Without submitting the H1 form, the temporary exemption cannot be applied. The administration does not trigger it automatically. A delay in declaration may also lead to an automatic taxation based on an estimate by the property service, often less favorable than your own declaration.
What to do if the deadline is exceeded
If you realize that the 90 days have passed, submit the form anyway. The administration may impose penalties, but in practice, a late submission accompanied by an explanatory letter often results in regularization without major additional costs. Send everything to the competent property service, preferably via secure messaging to keep a dated record.
H1 form and property tax exemption: the direct link
The property tax exemption for new construction is the most immediate tangible benefit of the H1 form. It applies in principle for two years from January 1 following the completion of the work.
This exemption is not automatic. It requires three conditions to be met:
- The submission of the H1 form within the legal deadline to the competent property service
- That the construction concerns a new dwelling or a significant extension (extension, conversion of an outbuilding into housing, construction of an annex building)
- That the municipality has not deliberated to remove this exemption on the communal part of the property tax
This last point is often overlooked. Some municipalities have voted to partially or completely eliminate this exemption. Check with your town hall before relying on this provision. The property service can also provide information during the submission.
The H1 form applies to individual houses and their outbuildings. For a condominium apartment, the H2 form applies. Confusion between the two is common, especially during a purchase in VEFA. The developer sometimes provides the wrong form, which delays the declaration.
Submitting the correct form to the right service, within the stipulated timeframe, remains the most direct way to secure your tax situation after construction work. The digital channel simplifies the process and offers traceability that regular mail does not guarantee.