Renovation Mortgage

Planning a major renovation or extension? Discover how a mortgage for significant construction projects works, from the permit process to the technical documentation. The complete guide to securing your financing.

Published on Dec 04, 2025
Updated on Dec 04, 2025
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In Brief (TL;DR)

A mortgage for major renovations and extensions is the financial solution designed for significant construction projects that require a large loan amount and more complex technical and bureaucratic documentation.

We will explore solutions for financing large-scale construction projects, which by their nature require a more complex approval process and technical documentation.

A focus on financing for large-scale projects, which involve more elaborate authorization procedures and technical documentation.

The devil is in the details. 👇 Keep reading to discover the critical steps and practical tips to avoid mistakes.

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Renovating, expanding, or radically transforming your home is a project that combines the desire to improve your quality of life with a significant investment in the future. In Italy, where real estate is often rich in history and tradition, large-scale projects like major renovations or extensions require a specific, structured financial tool: the major renovation mortgage. This product is distinctly different from a simple personal loan, offering larger amounts and longer repayment plans suited for complex and costly work.

Tackling a project of this magnitude means navigating building regulations, design choices, and, above all, finding the most suitable financial solution. Understanding how this type of mortgage works, what documents are needed, and how the funds are disbursed is the first step in turning an idea into a concrete reality, enhancing your property’s value in a market that increasingly appreciates quality and energy efficiency. This article will explore every aspect of the mortgage for major renovations and extensions in detail, providing a clear guide for anyone wishing to embark on this journey.

Architect showing a home extension project on a table to a client couple.
Planning a major renovation or extension adds value to your property. Discover mortgage solutions to transform your home.

What Are Major Renovations and Extensions?

When we talk about major renovations, we’re not referring to simple routine maintenance like painting walls. We’re entering the realm of extraordinary maintenance, conservative restoration, or full-scale building renovation. These interventions affect the building’s structural elements, such as load-bearing walls, floors, and roofs, or modify its volume and shape, as in the case of extensions. For this type of work, it is essential to obtain specific building permits from the municipality, such as the CILA (Certified Communication of Work Commencement) for lighter interventions, the SCIA (Certified Report of Activity Commencement), or the Building Permit for more complex works that modify the structure or volume of the property.

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How a Mortgage for Major Projects Works

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A major renovation mortgage is a mortgage loan intended to cover the costs of construction work. Unlike a purchase mortgage, its distinctive feature often lies in the disbursement method. For large amounts and complex projects, the most common solution is the mortgage with disbursement in stages (Stato Avanzamento Lavori – SAL). With this formula, the bank does not release the entire sum at once but in several installments as the work progresses. Each disbursement is subject to a technical appraisal by a professional appointed by the bank, who verifies the completion of a specific phase of the project, such as the foundation, the roof, or the systems. This mechanism protects both the borrower, who takes on debt gradually, and the bank, which finances a real and certified increase in the property’s value.

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Requirements and Documentation: Preparing for the Application

The process for obtaining a major renovation mortgage is more complex than for a standard loan. In addition to the usual personal and income documents (ID card, latest pay stubs, or tax returns), the bank requires detailed technical documentation about the project. It is essential to present a bill of quantities and cost estimate prepared by a qualified professional (architect, engineer, or surveyor), which lists all the work to be performed with their respective costs. In addition, the building project and the permits (CILA, SCIA, Building Permit) issued by the municipality must be submitted. The completeness and accuracy of these documents are crucial for the bank’s evaluation and for the proper structuring of the SAL mortgage.

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The Value of Tradition and the Drive for Innovation

The Italian and Mediterranean context offers a unique landscape where renovation often means working on historic buildings, farmhouses, or rustic homes. These projects present a fascinating challenge: combining respect for architectural tradition with the demands of modern comfort and sustainability. A valuable project doesn’t just restore; it integrates innovation. This includes considering energy efficiency, with the installation of thermal coats, photovoltaic systems, or heat pump heating systems, which can provide access to specific products like the green mortgage. Ancient materials like stone and wood are enhanced, paired with advanced technological solutions for a home that is both rooted in history and projected into the future.

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Tax Benefits: How to Optimize Your Investment

Undertaking a major renovation can become more advantageous thanks to tax incentives provided by the government. The Renovation Bonus (Bonus Ristrutturazioni), for example, allows you to deduct a percentage of the expenses incurred from your IRPEF (personal income tax). For 2025, the regulation provides for a 50% deduction for expenses related to work on a primary residence, up to a maximum spending cap. It is crucial to check the current regulations when starting the work, as rates and conditions may vary. These bonuses can be combined with the mortgage and represent a significant opportunity to reduce the overall financial burden of the operation, making the investment even more profitable. For a complete guide on how to integrate these benefits, it may be useful to consult an in-depth article on mortgages and renovation bonuses.

Renovation Mortgage or Personal Loan?

To finance major projects, the choice between a mortgage and a personal loan is crucial. A personal loan is quicker to obtain and does not require a mortgage lien, but it has amount limits (usually under €75,000) and higher interest rates. It is suitable for small-scale projects. For major renovations or extensions, which require substantial funds, a mortgage is the necessary choice. It offers larger amounts, terms of up to 30 years, and significantly lower interest rates, making the monthly payment more manageable. Although the bureaucratic process is longer and more complex, requiring appraisals and the registration of a mortgage lien, the economic advantages for a large-scale project are undeniable. For a detailed comparison, you can read the guide to choosing between a mortgage or a loan for renovations.

Conclusion

disegno di un ragazzo seduto a gambe incrociate con un laptop sulle gambe che trae le conclusioni di tutto quello che si è scritto finora

Undertaking a major renovation or extension is a complex but extremely rewarding journey. It requires careful planning, the support of qualified professionals, and a solid financial strategy. The major renovation mortgage, especially the formula with disbursement in stages (Stato Avanzamento Lavori), proves to be the most effective tool for managing large-scale projects, ensuring a cash flow that matches the progress of the construction site. In a real estate market showing signs of recovery and a growing interest in quality properties, investing in improving your home means not only increasing its economic value but also creating a living space that reflects your needs, in a perfect balance between the charm of tradition and the opportunities of innovation.

Frequently Asked Questions

disegno di un ragazzo seduto con nuvolette di testo con dentro la parola FAQ
What documents are needed to apply for a major renovation mortgage?

To start the application for a major renovation mortgage, you need standard personal and income documents, such as an ID card, tax ID number, and documentation proving your income. In addition, the bank will request all technical documentation related to the property and the work. This includes the detailed cost estimate prepared by the construction company, the project approved by the municipality (such as CILA, SCIA, or Building Permit), and the property’s cadastral documents.

Is it possible to finance both the purchase and the renovation with a single mortgage?

Yes, this is a very common and advantageous solution. There are specific products, called ‘purchase and renovation mortgages,’ that allow you to obtain a single loan to cover both expenses. This simplifies management, reducing notary and administrative costs, and allows for a single monthly payment. The bank will evaluate both the purchase price and the estimated cost of the work to determine the total loan amount.

How is the money from a renovation mortgage disbursed?

Unlike a purchase mortgage, funds for a renovation are usually disbursed in several installments. This method is known as disbursement by work progress stages (Stato Avanzamento Lavori – SAL). After an initial appraisal, the bank releases a portion of the sum. Subsequent installments are disbursed only after a bank-appointed appraiser has verified that the work has been completed according to the project and has confirmed the progress of the construction site.

What types of projects qualify as ‘major renovations’ eligible for a mortgage?

‘Major renovations’ include significant construction projects that can transform a building into an entity that is wholly or partially different from the previous one. This category includes work that modifies the structure, volume, or intended use of the property, such as a home extension, adding a floor, structural consolidation, or a complete overhaul of the systems and internal layout. This work requires specific municipal permits like a Building Permit or a complex SCIA.

Are there tax benefits if I take out a mortgage for a major renovation?

Yes, Italian law provides significant benefits. It is possible to deduct 19% of the interest and accessory charges paid on a mortgage for the renovation of a primary residence from your IRPEF (personal income tax), up to a maximum amount of €2,582.25. This deduction can be combined with other government incentives, such as the ‘Renovation Bonus,’ which allows you to recover 50% of the expenses incurred for the work. If the projects improve energy efficiency, you can also access the Ecobonus.

Francesco Zinghinì

Electronic Engineer expert in Fintech systems. Founder of MutuiperlaCasa.com and developer of CRM systems for credit management. On TuttoSemplice, he applies his technical experience to analyze financial markets, mortgages, and insurance, helping users find optimal solutions with mathematical transparency.

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