How to Get a Mortgage in the UK: The Complete Process Explained

Getting a mortgage in the UK is the largest financial transaction most people will ever make, and the process is opaque the first time you do it. This guide walks through the full sequence — from preparing your finances before you apply, to the day you pick up the keys — so you know what to expect at each stage and where the expensive mistakes tend to happen.

Before You Apply: The Preparation

Most mortgage rejections are decided before the application is even submitted, by the state of the borrower's finances in the 6 to 12 months beforehand. Lenders will look at your credit file, your deposit, your income, your outgoings, and your existing debt. The most common reasons for decline — missed payments on a mobile phone contract, a maxed-out credit card, an undisclosed overdraft — are all things you can fix in advance.

Pull your credit file from all three UK credit reference agencies (Experian, Equifax, TransUnion) — the statutory reports are free. Check for errors, old addresses, and any missed payments you'd forgotten about. If you have credit card balances, pay them down to under 30% of the limit on each card in the months before you apply — the utilisation ratio matters more than the absolute balance. Don't apply for new credit in the 6 months before a mortgage application: every hard search knocks a few points off your score and signals you're shopping for credit.

Save your deposit. UK lenders require a minimum 5% deposit for residential purchases, but the best rates start at 15% to 25% loan-to-value (LTV). The difference between a 95% LTV rate and a 75% LTV rate is typically 0.5 to 1.0 percentage points, which compounds into tens of thousands of pounds over a 25-year term. Use our Mortgage Affordability Calculator to see how much you can borrow at different deposit levels.

Step 1: Get an Agreement in Principle

An Agreement in Principle (AIP), also called a Decision in Principle or Mortgage in Principle, is a lender's written confirmation that they would lend you a specific amount, subject to a full application and property valuation. It's free, takes 15 minutes online, and uses a soft credit search (which doesn't affect your score). Estate agents will usually ask to see an AIP before they'll let you view a property, and sellers will expect one before they'll accept an offer.

An AIP is not a guarantee — the lender can still decline at full application stage if your circumstances change, if the property doesn't value up, or if their underwriting reveals something the soft search missed. But it's a strong signal of how much you can borrow, and it lets you shop within your actual budget rather than guessing.

Step 2: Find a Property and Make an Offer

Once your offer is accepted, the legal work begins. In England, Wales, and Northern Ireland, the offer is not legally binding until contracts are exchanged — which is typically 8 to 12 weeks after the offer is accepted. In Scotland, the system is different: offers become binding much earlier through the missives process. Either way, instruct a conveyancer (solicitor or licensed conveyancer) the day your offer is accepted, not later. Good conveyancers are busy and the bottleneck in most property transactions is the legal work, not the lender.

Step 3: Submit the Full Mortgage Application

Your lender (or mortgage broker) will now submit the full application. You'll need to provide: 3 to 6 months of payslips, 3 to 6 months of bank statements, proof of ID and address, proof of deposit (bank statements showing the money sitting in your account), and — for the self-employed — 2 to 3 years of accounts or SA302 tax calculations from HMRC. The lender will run a hard credit search, assess your affordability using their stress-tested calculations, and order a property valuation.

UK affordability rules require lenders to stress-test your ability to repay at an interest rate typically 1 percentage point above the revert rate, even if you're taking a fixed rate. That's why lenders will sometimes lend less than the AIP suggested — the AIP is a soft estimate, the full application uses the harder stress test.

Step 4: Valuation and Survey

The lender will commission a valuation — this is for their benefit, to confirm the property is worth what you're paying for it, and you usually pay for it. The lender's valuation is not a survey. It's a 20-minute drive-by or desk-based assessment that tells them the property is adequate security for the loan — nothing more.

For your own protection, commission a separate survey. A Homebuyer Report (Level 2) costs around £400–£700 and covers major defects. A Building Survey (Level 3) costs £600–£1,500+ but is essential for older, larger, or unusual properties. The £400 cost of a Homebuyer Report can save you tens of thousands in unexpected repairs.

Step 5: Conveyancing and Searches

Your conveyancer will carry out local authority searches (planning, building control, roads, environmental), water and drainage searches, and — in some areas — mining or subsidence searches. They'll also check the title deeds for restrictive covenants, easements, and any leasehold complications. Leasehold purchases in particular can be slow: if the lease is under 80 years, the lender may decline or require a lease extension before completion.

Step 6: Exchange and Completion

Exchange of contracts is the moment the deal becomes legally binding — you'll lose your deposit (typically 10%) if you pull out after exchange. The completion date — the day the money is transferred and you pick up the keys — is usually 7 to 28 days after exchange. Your mortgage funds are released on the day of completion, and your first monthly payment is typically taken the month after completion.

Use a Broker or Go Direct?

A whole-of-market mortgage broker has access to lenders that don't deal direct with the public (like some building societies) and can save you the legwork of comparing rates across 80+ lenders. Brokers are typically paid by commission from the lender, so the advice is often free to you — though some charge a fee of £300 to £500 for complex cases. The advantage is that they pre-screen your application before submission, which reduces the chance of a hard search followed by a decline.

Going direct to your bank is fine if you have a clean credit file, a clear income source, and a standard property purchase — you'll usually get the same rate your bank advertises online. The risk is that if your bank declines, you've wasted a hard credit search and weeks of processing time. A broker will place your application with the lender most likely to accept it on the first try.

Total Timeline

From starting preparation to picking up the keys, expect:

• Preparation (3–6 months): Credit file cleanup, deposit saving, AIP.
• Property search (1–6 months): Variable, depends on the market and your criteria.
• Offer to completion (8–16 weeks): Application, valuation, conveyancing, exchange, completion.

Budget for total fees of around £2,000–£5,000 on top of your deposit: valuation, survey, conveyancing, Land Registry, and lender arrangement fees. Use our Stamp Duty Calculator to work out the SDLT separately, as that's a significant additional cash cost on completion day.