Home projects: how to calculate the budget and the margin for unexpected costs before requesting financing

Renovating a house can improve comfort, functionality, and efficiency, but costs are not always limited to the initial budget. Design changes, issues identified during construction, and delays can increase total expenses.

Before applying for financing, it's important to calculate the necessary investment, understand how much you can cover with own capital, and determine if you need to use credit.

Start by defining the scope of the works

Make a list of planned tasks and separate essential interventions from improvements that can be postponed.

For example, replacing an old electrical installation may be a priority, while renewing decorative elements can be done later.

Request detailed quotes, with materials, labor, deadlines, payment terms, and indication of included work. Compare equivalent proposals to avoid choosing only by final price.

What expenses should I include in the budget?

The budget should consider more than materials and labor. Depending on the intervention, it may include:

Demolition and waste removal

Construction materials and finishes

Labor and technical support

Projects, licenses and fees, when applicable

Transport and storage of materials

Equipment and temporary accommodations

Final cleaning and complementary repairs

Save an extra margin for unexpected issues. The right amount depends on the property's condition, the complexity of the work, and budget uncertainty. In old houses or interventions involving structures and installations, the risk of hidden problems may be higher.

How to calculate the needed financing?

After estimating the total cost, subtract the amount you can provide without compromising your financial reserve.

The remaining amount corresponds to the potential funding need, but must confirm if all expenses can be covered by the chosen credit product.

Compare credit solutions for construction and personal loans, considering purpose, terms, interest rate, installment, and total cost.

Avoid contracting an amount based only on the lowest budget if there are relevant slipping risks. On the other hand, asking for excessive financing also increases costs.

How to control costs during the construction?

Track real expenses against the initial budget. Record changes, request prior approval for additional work, and confirm payment terms with professionals.

If the cost starts to exceed the forecast, review non-essential tasks before using more credit.

Simulate the financing for your construction

If you already have a cost estimate, make a free and commitment-free simulation. Count on us to get a personalized analysis, compare financing options, and see which payment is best for your budget. Our experts handle everything for you, without bureaucracy.

FAQ

What margin should I set aside for emergencies?

It depends on the house condition, the complexity of the work, and the quality of the quotes. Ask for professional evaluation and set a reserve compatible with identified risks.

Can I fund all the work expenses?

It depends on the product and the institution. Confirm if the financing covers materials, labor, projects, and other expenses.

Is it better to ask for a loan before or after having the budgets?

Get detailed quotes to determine the required amount and compare proposals. Before committing to contractors, confirm financing terms and deadlines.