When planning a home extension, loft conversion or full property renovation, one of the most important questions is: "How much will it cost, and how will I fund it?" At dRAW Architecture, we understand that home improvements are both a creative and financial investment. That’s why we've developed a free, easy-to-use Home Improvement Loan Calculator specifically tailored for UK homeowners.
This tool is designed to help you estimate how much you might need to borrow, what your monthly repayments could look like, and how different loan terms and interest rates affect your total costs. Whether you're building an open-plan kitchen, extending your rear, or upgrading your interiors, this calculator gives you the clarity you need before you even speak to a lender.
Use our Home Improvement Loan Calculator below to get instant estimates based on your desired loan amount, loan term, and expected interest rate. Unlike basic tools that simply return a repayment figure, ours shows you a graphical breakdown of how your money is spent over time, separating interest from principal. It also includes UK regional adjustments, notes for planning contingencies, and recommendations on optimising your budget.
Our home improvement loan calculator is engineered for simplicity and precision. You enter the loan amount you think you’ll need, based on your projected renovation budget, then set your expected interest rate and desired repayment term (in years). Behind the scenes, we apply the standard amortisation formula used by UK lenders to estimate your monthly repayments and total cost over time.
It also applies a regional cost adjustment, particularly if you're based in London or the South East, where construction and labour costs tend to be 10–15% higher than the UK average.
Once you hit "Calculate", you’ll see:
This is perfect if you’re planning a home extension and want to know what financing might look like before contacting a bank or broker.
Whether you’re a first-time homeowner planning your dream kitchen extension, or a seasoned property developer evaluating the cost of a loft conversion, this calculator is for you. It’s especially useful for:
This is not just a generic tool; it's built with architectural projects in mind, making it ideal for clients working with dRAW Architecture.
For many UK homeowners, financing a renovation through a home improvement loan can be a smart way to manage cash flow while investing in long-term property value. Here are a few key benefits:
At dRAW Architecture, we’ve seen how a well-designed and financed extension can transform a home’s functionality and future resale appeal.
In the UK, most lenders will assess your borrowing capacity based on your income, credit history, equity, and existing debts. For example:
Income Band
Potential Loan (Estimate)
£30,000/year
Up to £15,000
£50,000/year
Up to £25,000
£75,000/year
Up to £50,000
If you're remortgaging, you may unlock more funds by borrowing against the value of your home. According to MoneyHelper.uk, typical loan APRs for home improvement projects range from 5% to 7% for secured loans, and slightly higher for unsecured loans.
Our calculator helps you model different loan amounts and durations so you can decide what’s affordable. But remember, this is only a guide; always speak to a financial advisor before committing to any loan product.
Before applying for a home improvement loan, consider the following practical tips:
At dRAW Architecture, we guide clients not just in design, but also in budgeting smartly and ensuring their vision is financially viable.
As a full-service architectural practice, dRAW Architecture supports clients from concept to construction. We specialise in London extensions, interior remodels, loft conversions, and bespoke new builds. Here’s what makes us different:
Whether you need help estimating your renovation cost or full design + build support, our team is ready to help turn your plans into reality.
Absolutely. Whether it's a rear extension or attic build-out, the loan calculator estimates repayments based on your financing amount, regardless of the type of work.
No, the calculator focuses on loan repayment only. Planning fees, VAT (usually 20%), and professional costs (like architectural fees) should be factored in separately. We provide transparent advice on these at dRAW Architecture.
Typical rates for secured home improvement loans in the UK range from 4.9% to 7.9%, depending on the provider and your credit profile. Always check with your lender or mortgage broker.
Yes, if you’re planning to remortgage to fund your renovation, simply input the loan amount you plan to raise, and adjust the interest rate and term accordingly.
Use our Home Improvement Loan Calculator above to take the first step. When you’re ready to move forward, speak to one of our architects to get a personalised cost estimate and help plan your project.
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We’ve helped hundreds of homeowners like you realise the full potential of their homes, and it all starts with a conversation.
This calculator is intended as a general guide and does not constitute financial advice. Actual loan amounts and repayments will vary based on your lender, credit history, income, and property value. For regulated advice, please speak to a financial advisor or mortgage broker. dRAW Architecture does not provide lending or brokerage services.