Buying a Home
Remortgaging
Landlord
Specialist
Secured Loans
Debt Consolidation
Conveyancing
Finding a Solicitor
Secured Loans
Loft conversions typically cost £30,000 to £120,000, and a secured loan is often the most practical way to borrow amounts this large. Spreading the cost over a longer term keeps your monthly budget free for the rest of the project.
A secured loan for a loft conversion is a form of borrowing that uses the equity in your home as security, letting you access larger amounts than a typical unsecured personal loan. It's sometimes called a homeowner loan or a second charge mortgage, and it sits alongside your existing mortgage as a separate, additional charge on your property.
The trade-off is risk: your home may be repossessed if you don't keep up repayments. Because of this, it's worth comparing a secured loan against remortgaging and unsecured borrowing, and speaking to an advisor about which option suits your circumstances, before committing to a lender. Checking your eligibility won't affect your credit score.
For many homeowners, a secured loan for loft conversion work is the most practical way to fund a project this size. A loft conversion sits in a financial sweet spot: the amounts involved are usually too large for most personal loans, but you're investing in your property rather than spending on something that loses value.
When you're borrowing £40,000, £60,000, or more for a dormer or mansard conversion, an unsecured personal loan either won't stretch that far or comes with monthly repayments that are hard to manage. Most unsecured lenders cap borrowing at £25,000-£35,000, and even then, terms are usually just five to seven years.
A secured loan changes the equation. By using your property as security, lenders can offer larger amounts, longer terms, and more competitive rates than most unsecured products. Spreading the cost over 10, 15, or even 25 years, rather than cramming it into a five-year term, keeps the monthly payment manageable. Secured loans tend to work well for loft conversions because the money goes directly into increasing your property's value - you're using your existing equity to help create more of it.
Say you need £50,000 for a dormer loft conversion with an ensuite bathroom. Here's broadly how the borrowing options compare:
Speak to an advisor about the term and lender that would give you the most manageable monthly payment for your circumstances. The right balance depends on your income, other commitments, and how much certainty you want over the total cost.
The term length often matters more than the headline rate when it comes to affordability. Stretching a £50,000 loan from 10 to 15 years can cut the monthly payment significantly, even though you'll pay more in total interest. It's worth asking your advisor to show you a few different term options side by side.
Budgeting for your project
An advisor can talk through your project budget and equity position to help you settle on the right amount before you apply.
The amount you can borrow depends on three main factors: how much equity you have in your property, your income, and your credit history. When you apply for a secured loan for a loft conversion, you'll also need to meet each lender's eligibility criteria, which usually includes providing project plans and proof of income.
Equity is the portion of your property you own outright. It's calculated by subtracting your outstanding mortgage from your property's current market value.
Most lenders will let you borrow up to 80-85% of your property's value when combining your mortgage and secured loan. Some specialist lenders will go higher, up to 90% or even 95% loan-to-value (LTV), though this narrows your choice of lender.
David owns a property worth £350,000 with £180,000 remaining on his mortgage. If he wanted to borrow at 80% LTV (a common maximum), he could access £100,000 - plenty for even the most extensive loft conversion. David might still choose to borrow less and keep some equity in reserve.
Having equity available doesn't automatically mean you can borrow the full amount. Lenders carry out affordability assessments to check you can comfortably manage the monthly repayments alongside your mortgage and other commitments.
Underwriters typically focus on your debt-to-income ratio, your recent credit activity, and your essential monthly outgoings. As a rough guide, most lenders want your total monthly debt payments, including your mortgage and the new secured loan, to stay below 40-45% of your gross monthly income.
Example: affordability in practice
Sarah earns £4,200 a month and currently pays £950 for her mortgage. She wants to borrow £60,000 for a loft conversion:
That range gives Sarah and her advisor a starting point for comparing terms and lenders to find a monthly payment that's comfortably within her budget, with some room to spare.
With secured lending, your credit history matters less for approval than it does with unsecured borrowing, but it still affects the rate you're offered. Lenders generally reserve their most competitive rates for applicants with a strong credit history, while fair or poor credit typically means a higher rate or a need to use a specialist lender.
Poor credit doesn't necessarily prevent you from getting a secured loan for a loft conversion. It usually means paying a higher rate, but the project can still make financial sense if the conversion adds meaningful value to your property.
Affordability calculators are a starting point, not the final word. If the numbers look tight on paper, speak to an advisor - some lenders take a more flexible view of overtime, bonuses, or self-employed income than others.
Understanding typical loft conversion costs helps you work out exactly how much you need to borrow. Going in with accurate figures helps you avoid running short halfway through the project.
The type of conversion you choose has the biggest impact on cost. Here's what to expect for a typical 25-30 square metre loft space:
Velux conversions suit properties with good existing headroom, dormers work for most UK homes including terraced and semi-detached houses, hip-to-gable conversions suit semi-detached homes with hipped roofs, L-shaped dormers are common in Victorian and Edwardian terraces, and mansard conversions maximise space in period properties. These figures include labour, materials, and basic fit-out but exclude VAT, planning fees, and premium finishes.
The headline conversion cost doesn't cover everything. Budget for these extras:
Professional fees:
Finishes and fixtures:
Contingency: it's worth adding 10-15% for unexpected issues like structural problems discovered during work, supply delays, or design changes.
Example: a realistic total budget
James wants a rear dormer conversion with an ensuite bathroom in his terraced home in Manchester. His realistic budget looks like this:
James decides to borrow £65,000 to cover the project with a small buffer, giving him certainty that the work won't stall due to funding issues.
Home improvement finance
Tell us about your project and we'll compare options from a wide range of lenders to find what's available for your circumstances.
One of the most important questions when borrowing for home improvements is whether the investment will pay off. For loft conversions, the data is generally encouraging. Converting your loft can add significant value to your property while creating extra living space, without the cost and disruption of moving home.
The value uplift from a loft conversion varies by region, but on average, a loft conversion can add somewhere between £35,000 and £200,000 in property value, depending on location. It's also often a more sustainable option than building a new extension or moving home, since it makes use of existing space.
Research from major lenders and property platforms consistently shows that well-designed loft conversions adding a bedroom and bathroom can increase property values by 15-25%. One widely cited study found that a loft conversion incorporating a double bedroom and ensuite added an average of around 21% to property values, rising to around 24% in London.
The return depends heavily on where you live. In high-value areas where space commands a premium, the percentage uplift translates into substantial sums. In lower-value regions, the absolute increase may be smaller but can still exceed the cost of the project.
The key question isn't just whether a loft conversion will add value, but whether it will add more value than it costs.
Example: a return on investment calculation
Helen's three-bedroom house in Bristol is worth £380,000. She's considering a £55,000 dormer conversion with an ensuite:
Once she's factored in the cost of borrowing, the return will be lower than this headline figure, since interest on the loan reduces the net gain. An advisor can help you model this using the term and lender options available to you, so you can see whether a project is likely to leave you ahead once the loan is fully repaid.
Not every loft conversion adds 20% to property values. Watch out for these scenarios where returns may be lower:
Price ceiling issues: if your home is already near the maximum value for properties in your area, improvements can't push you above that ceiling. A three-bed house on a street of three-beds has limited upside regardless of how good the loft conversion is.
Poor quality work: cheap, badly designed conversions can add minimal value or even detract from a property. Buyers are wary of loft rooms with awkward headroom or inadequate fire safety.
Lack of building regulations sign-off: a conversion without proper certification raises red flags for buyers and their surveyors. Some mortgage lenders won't lend on properties with uncertified work.
Cramped or impractical spaces: a tiny loft room with insufficient headroom or an awkward staircase won't appeal to buyers. The minimum useful ceiling height is generally 2.2 metres at the centre.
While a secured loan is typically the best fit for larger loft conversions, it isn't the only option. A range of finance options are available, including specialist home improvement loans, bridging loans, development finance, and refurbishment loans. It's worth comparing lenders and loan terms to find the option that suits your project. Here's how the main alternatives compare:
How they work: you borrow against the equity in your property. The loan runs alongside your existing mortgage as a second charge. If you can't repay, the lender can ultimately repossess your home, though this is a last resort after extensive attempts to find a solution.
Pros:
Cons:
Best for: loft conversions costing £25,000 or more, where you want to spread payments over many years.
How it works: you replace your existing mortgage with a larger one, releasing equity as cash. The new mortgage covers your current balance plus the amount you want to borrow.
Pros:
Cons:
Best for: homeowners whose current mortgage deal is ending anyway, or who are on a standard variable rate.
How they work: you borrow based on your income and credit history, without using your home as security.
Pros:
Cons:
Best for: smaller loft projects under £25,000, where you can afford higher monthly payments.
How they work: you use credit cards, possibly with a 0% purchase or balance transfer offer, to fund work.
Pros:
Cons:
Best for: additional fixtures and fittings after the main build, not the core project.
The rate you're offered on a secured loan for a loft conversion depends on your full circumstances, and it's worth speaking to an advisor for an accurate, up-to-date picture based on your situation. Several factors influence the rate lenders offer:
Loan-to-value (LTV): the lower your LTV, the better your rate is likely to be. Borrowing at 60% LTV will typically get you a more competitive rate than borrowing at 80% LTV.
Credit score: your credit history has a significant impact on pricing. Even moving from a fair to a good credit history can make a meaningful difference to the rate you're offered.
Loan amount: some lenders offer better rates on larger loans, for example £50,000 or more, because their fixed costs are spread over more borrowing.
Term length: shorter terms sometimes attract slightly lower rates, though this isn't universal.
Fixed vs variable: fixed rates give you certainty over your payments but may be slightly higher initially. Variable rates can change, which introduces uncertainty but may start lower.
A secured loan involves more than just the interest rate. It's worth budgeting for these additional costs:
Most secured loan lenders charge an arrangement fee, typically £500-£2,000. This can usually be added to the loan rather than paid upfront, though that means you'll pay interest on it over the term of the loan.
The lender needs to verify your property's value. Basic valuations cost £200-£400, though some lenders include this in their arrangement fee.
A solicitor handles the legal work to register the secured loan against your property. Expect to pay £300-£600, though some lenders cover this.
If you use a broker, there may be a fee for their service. We're upfront about any fees and explain them clearly before you commit to anything.
Michael borrows £45,000 for his loft conversion. Once his arrangement fee is added to the loan, his actual monthly payment is based on £46,500 rather than £45,000, so it's worth factoring this in from the start.
Applying for a secured loan is more involved than applying for a personal loan, but it shouldn't be intimidating. Before you start, it helps to have a clear plan for your loft conversion, including your budget, timeline, and how you intend to use the funds. It's also worth consulting a loft conversion specialist before making any borrowing decisions, to make sure your project is feasible and your financing lines up with what you need. Most secured loans complete in 3-6 weeks from application to funds landing in your account, though complex cases can take longer. Here's what typically happens at each stage:
What to expect
Initial enquiry and soft search (day 1)
You provide basic information about your property, income, and how much you want to borrow. A soft credit check, which doesn't affect your credit score, helps assess your options.
Full application (days 1-3)
Once you've chosen a lender, you complete a full application covering your income, employment, existing debts, and monthly outgoings. You'll typically need proof of identity, proof of address, recent payslips or accounts, bank statements, your mortgage statement, and details of other financial commitments.
Valuation (days 5-10)
The lender arranges a valuation of your property. This can be a physical inspection or, increasingly, an automated valuation for straightforward cases.
Underwriting (days 7-14)
The lender's underwriting team reviews your application, verifies the information, and makes a final decision. They may come back with questions or requests for additional documents.
Offer issued (days 14-21)
Once approved, you receive a formal loan offer detailing the terms and repayment schedule. Take time to review this carefully before accepting.
Legal completion (days 21-28+)
A solicitor registers the secured loan against your property. Once this is complete, the funds are released to you.
A secured loan for a loft conversion can be a sound financial decision, but it's important to go in with your eyes open. Building work can be disruptive, and it's worth checking with your building control team and your insurer before work starts, since any change to your home's structure or value may need to be reflected in your policy. You'll also need to follow building regulations to make sure the work is done safely.
This is the most important consideration. Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it. Repossession is a worst-case scenario that lenders try to avoid, but it's a real possibility if your circumstances change dramatically and a solution can't be found.
Before borrowing, it's worth thinking through some scenarios: could you still afford the payments if you lost your job? If interest rates rose significantly? If your circumstances changed unexpectedly? If you're ever worried about keeping up with repayments on any debt, free and impartial guidance is available from MoneyHelper at moneyhelper.org.uk or by phone on 0800 138 7777.
A 15 or 20-year loan is a significant commitment. You'll be making payments for years after the loft conversion is complete, so it's worth being comfortable with this before proceeding.
Loft conversions can run into unexpected issues - structural problems that weren't visible until work began, supply delays, or changes you decide to make mid-project. A contingency fund, and potentially borrowing slightly more than the quoted cost, provides a safety net.
While loft conversions generally add value, property markets can decline. If you borrow heavily against your property and values fall, you could end up in negative equity. This matters most if you might need to sell in the next few years.
Most secured loans include early repayment charges during an initial period, typically 3-5 years. If you want to pay off the loan early, perhaps because you're selling the property or remortgaging, you might face a charge of 1-5% of the outstanding balance.
If you're concerned about getting approved for a secured loan for a loft conversion, a few practical steps can help. It's worth checking your credit score, gathering your documents early, comparing lenders, and going in with a clear plan and budget for the project.
Before you apply
Getting a secured loan for a loft conversion through Money Saving Advisors follows a straightforward process:
How it works
Check your eligibility
Use our online form or call our team for an initial assessment. We run a soft credit check that doesn't affect your score and give you an idea of what you could borrow.
Speak to a specialist
An advisor will discuss your loft conversion plans, understand your circumstances, and compare options from a wide range of lenders. We explain the costs and alternatives clearly.
Full application
If you're happy to proceed, we handle the paperwork and liaise with the lender on your behalf, answering questions and keeping things moving.
Funds released
Once your application is approved and completed, the funds go directly to your account and you're ready to start your loft conversion.
Why work with us
Common questions
Yes, but expect to pay a higher interest rate. Secured lending is more accessible than unsecured borrowing because your property provides security for the lender. Lenders on our panel consider applicants with past credit problems, including missed payments, defaults, and satisfied debts. The key is finding a lender who specialises in non-standard credit situations.
You don't need a deposit in the traditional sense. Instead, you need available equity in your property. The minimum usable equity required varies by lender, but typically starts around £15,000-£20,000 after accounting for loan-to-value limits.
Your existing mortgage terms remain unchanged. The secured loan sits alongside your mortgage as a separate debt. However, having a secured loan can affect future remortgaging decisions, because lenders will consider your total debt when assessing affordability.
Some lenders offer drawdown facilities where you release funds in stages, which can save interest because you only pay on what you've borrowed. Many standard secured loans release the full amount upfront, though, so it's worth discussing your preference with your advisor to find a suitable lender.
This is why it's worth borrowing slightly more than the quoted cost and keeping a contingency fund. If you've already taken a secured loan and need more, options include a further advance from the same lender, a separate personal loan for the shortfall, or renegotiating the existing facility before funds are released.
It depends on your current mortgage deal. If you're locked into a low rate with early repayment charges, a separate secured loan often works better. If your mortgage deal is ending or you're on a standard variable rate, remortgaging might make more sense. An advisor can help you compare both options.
Typical secured loan timelines are 3-6 weeks from application to funds in your account. If you need money faster, an unsecured loan, for amounts under £25,000, can complete within days. For larger amounts, some specialist lenders offer an expedited process, though this may come at a premium.
Yes. Self-employed applicants typically need to provide two to three years of accounts or tax returns to prove their income. Some lenders are more flexible than others with self-employed applicants, particularly if income has recently increased. An advisor can point you towards self-employed-friendly lenders.
When you sell, the secured loan is repaid from the sale proceeds along with your mortgage. Any remaining equity after both debts are cleared is yours. Just be aware of early repayment charges if you're still within the initial period.
Many loft conversions fall under permitted development rights and don't need planning permission, provided they meet certain conditions around size, materials, and roof alterations. This doesn't affect your loan application, since lenders care about your ability to repay rather than the planning status of your project. It's still worth checking with your local planning authority before starting work.
Yes. Many homeowners combine multiple projects into one loan, for example funding a loft conversion and a new bathroom together. This is often more efficient than taking out multiple smaller loans and can result in a better overall rate.
They're essentially the same thing. 'Secured loan', 'second charge mortgage', and 'homeowner loan' all describe borrowing secured against a property that already has a mortgage on it (the first charge). The terminology varies, but the product is the same: your property secures the loan, and the lender ranks behind your main mortgage for repayment.
Lenders typically ask the purpose of your loan. Home improvements like loft conversions are viewed positively, because you're investing in an asset that provides security for the loan. This is different from borrowing for something like a holiday or a car, which some lenders view less favourably.
It's worth getting a professional assessment before you arrange finance. Key factors include minimum headroom of 2.2-2.4 metres at the ridge, adequate floor space, an acceptable roof structure (traditional cut timber roofs are easier to convert than modern trussed roofs), and no issues with planning restrictions. A surveyor or specialist loft conversion company can advise.
What our clients say
Shortly after I spoke with Anna, she was also very helpful and made it effortless and a nice experience.
Had a really good experience regarding arranging a secured loan. They introduced me to a great advisor. Thanks for the help.
For once a loan transaction without stress and complications. Very impressed and highly recommended.
Thrilled to share my exceptional experience with Money Saving Advisors. The website made it incredibly simple and easy to connect with an advisor. They helped me find the best deal on my remortgage and secured a very competitive interest rate!
Great advice and money saved on mortgage.
I have previously declined a loan of the value I needed from various brokers, but this website found me a reputable broker with surprisingly decent rates.
Secured Loans
Compare rates from a wide range of lenders. Our expert advisors will find the right secured loan for your circumstances.
