The decision to buy a property using the first home benefit creates a mix of fiscal opportunity and timing constraints that buyers must manage carefully. If the newly purchased dwelling is not immediately usable because it lacks habitability or needs major work, the legal requirements do not automatically vanish.
The key obligations still focus on the residence transfer and disposal of any previously owned first home, and missing the deadlines can mean losing the tax advantage and incurring penalties.
Before scheduling renovations, it helps to map out administrative steps: identify the paperwork required by the local authority for an anagraphic change, estimate the duration of building permits and technical certifications, and coordinate sale timing of any prior
property. Engage with a trusted notary, an experienced technician, and a tax advisor early: their input reduces the risk of overlooking a procedural hurdle that could compromise the first home benefit.
Timing rules you cannot ignore
Two temporal obligations form the backbone of the regime: the buyer must transfer their official residence to the municipality where the property is located within 18 months of purchase, and the previously owned first
home generally must be alienated within the timeframe required by law — often cited as 12 months in practical guidance depending on the transaction. Additionally, the law forbids owning other properties purchased using the same benefit; when that condition exists, the purchaser may be required to commit to disposing of the earlier property, sometimes within two years. These are not mere recommendations: failure to comply can lead to recalculation of taxes, late interest and financial sanctions.
Married buyers and declarations
When the buyers are spouses, the rules acquire an extra layer. The tax authorities and courts have clarified that, for the first home benefit to apply to the whole property when spouses purchase under a legal community of property, both partners must supply the required spousal declaration. The Supreme Court confirmed this in ordinance no. 2476 of 5 February 2026: if only one spouse signs the declaration at the notarial deed, the benefit can be recognized only for that spouse’s share. This makes it crucial to secure both partners’ explicit declarations at signing if you expect relief on the entire acquisition.
When the house is not ready: legal and practical workarounds
Properties without habitability cannot be occupied until technical upgrades and certifications are complete, but this condition does not automatically void the tax relief. Buyers should sequence activities so that the registration of residence and any required sale of a prior residence align with municipal and fiscal deadlines. Practical measures include planning urgent minimum works that enable the municipality to accept a residence transfer, applying early for permits and habitability certifications, and preparing sale documentation for the previous property. A realistic schedule of works and bureaucratic lead times is essential to avoid unexpected noncompliance.
When a prior transfer is reversed: donation rescission
Certain contract rescissions have specific legal consequences relevant for benefits. For instance, a mutual rescission of a donation — commonly called mutuo dissenso — is not treated as a fresh alienation but as a retroactive cancellation of the original act. The Court of Cassation clarified this in ordinance no. 11401 of 2026: because the rescission annuls the prior donation ex tunc, it does not trigger the alienation-based forfeiture rules that would otherwise apply if the property had been sold within a five-year protective period. This nuance can matter when ownership histories intersect with fiscal safeguards.
Practical checklist and expert steps
To minimize risk, follow a concise checklist: consult a notary to confirm documentation needed for the residence transfer; ask a technician for a timetable to restore habitability and obtain certificates; prepare to sell any previous qualifying home within the deadlines tied to the benefit; and ensure both spouses sign the appropriate declarations when applicable. Keep written evidence of permit applications, certifications and communications with municipal offices: these documents help demonstrate good faith compliance if the tax office later audits the claim.
When to call a professional
Given the complexity of deadlines and the possible interaction of civil and tax law, professional advice is highly recommended. Engage a notary to validate the deed and collect the necessary declarations, a surveyor or architect to manage permits and habitability checks, and a tax consultant to model worst-case fiscal exposures. These specialists can tailor a pragmatic strategy so renovation schedules and legal timeframes run in parallel, preserving the first home benefit whenever the situation allows.
Final reminder
In short, buying a property that needs refurbishment does not automatically forfeit tax relief, but it demands careful planning around the residence deadline, disposal of prior properties and correct spousal declarations. Early engagement with a notary, local technicians and tax advisors is the most reliable way to protect the fiscal advantage while you restore your new home.