Getting a mortgage offer is a huge milestone, but it’s not the finish line. Many buyers think the hard work is over once the lender says yes. In reality, the period between mortgage approval and completion is where most delays, extra costs, and even collapsed sales happen. The conveyancing process alone typically takes four to eight weeks, and leasehold properties often stretch longer. Knowing exactly what to do in those weeks can save you thousands and keep the chain intact.
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This article is general information only and does not constitute professional advice. For your specific situation, consult a qualified professional.
Once your offer is accepted, the clock starts ticking on a series of appointments, documents, and payments that must happen in the right order. Miss one step and you could delay exchange, lose your mortgage offer, or face a penalty from the seller. Here’s what you actually need to know.
What Changes After Your Mortgage Offer Arrives
One term you’ll hear constantly during this phase is exchange of contracts. This is the legal moment when both buyer and seller commit to the sale. Before exchange, either party can walk away with minimal penalty. After exchange, you’re locked in.
What I tend to notice is that first-time buyers often treat the mortgage offer as the end of the process. It’s really the start of a separate, equally demanding phase. The next few weeks are about paperwork, not property hunting.
The Full Cost Picture After Approval
The purchase price is only part of what you’ll pay between now and moving day. Most buyers budget for the deposit and stamp duty but overlook the smaller fees that add up fast. Solicitor fees alone range from £800 to £1,800, and that’s before you add search costs, survey fees, and buildings insurance.
Here’s a breakdown of the typical costs you’ll face after your offer is accepted:
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| Cost Item | Typical Range | When It’s Paid |
|---|---|---|
| Solicitor / conveyancer fees | £800 – £1,800 | At completion (some require upfront retainer) |
| Local authority searches | £300 – £500 (combined) | Within first 2 weeks of instruction |
| HomeBuyer’s Report survey | £300 – £800 | Before exchange, usually within 10 days of booking |
| Full structural survey | £800 – £1,500 | Before exchange, for older or unusual properties |
| Buildings insurance (first year) | £150 – £400 | Must be in place from exchange date |
| Mortgage valuation fee | £0 – £500 (often free on basic products) | At application stage |
| Stamp duty (on £250k property) | £0 (first-time buyer) – £2,500 | On completion day |
One scenario that catches people out: you buy a flat for £200,000 with a 10% deposit. You’ve saved £20,000. But solicitor fees, searches, a HomeBuyer’s Report, and buildings insurance add another £1,500–£2,500 before you even move in. If you haven’t set aside that extra cash, you’re scrambling at the last minute.
My first move would be to ask your solicitor for a full fee breakdown in writing before you instruct them. Some quotes look cheap but exclude searches, land registry fees, or bank transfer charges. A clear quote upfront prevents surprises later.
Common Mistakes That Delay or Derail a Purchase
Changing jobs or spending big before completion
Lenders often run a final credit check and employment verification days before releasing funds. A new job, a car loan, or even a large credit card balance can cause the lender to withdraw the offer. One buyer I know bought furniture on finance two weeks before completion and lost their mortgage. The rule is simple: don’t change your financial situation until the keys are in your hand.
Not having buildings insurance from exchange day
Once you exchange contracts, you’re legally responsible for the property. If it burns down the night before completion, you lose your deposit and the house. Your solicitor will ask for proof of buildings insurance before exchange. Compare buildings insurance policies early so you’re ready to activate cover on the exchange date.
Ignoring the survey report
A HomeBuyer’s Report costs £300–£800 and can reveal issues like damp, subsidence, or outdated electrics. Many buyers skim the report and move on. But a serious defect can be a negotiating tool. If the survey finds £5,000 of necessary repairs, you can ask the seller to reduce the price by that amount. If they refuse, you can walk away before exchange with minimal loss.
Delaying document submission to your solicitor
Your solicitor needs ID, proof of funds, and signed client care letters before they can start searches. Every day you delay is a day added to the conveyancing timeline. Leasehold properties already take longer because the management company’s leaseholder pack adds extra correspondence. Don’t make it worse by sitting on paperwork.
Your Post-Approval Action Plan
Instruct your solicitor within 24 hours of offer acceptance
Time is the enemy here. The seller’s solicitor will send the contract pack to your solicitor once instructed. If you take a week to choose a conveyancer, you’ve already lost seven days. Get two or three solicitor quotes before you even make an offer, so you can instruct someone immediately. Your solicitor will then order local authority searches, water and drainage searches, and environmental searches — collectively £300–£500. These can take two to four weeks to come back.
Book your survey the same day you instruct your solicitor
Don’t wait for the lender’s valuation. That’s a separate, basic check the lender arranges to confirm the property is worth the loan amount. Your survey is for you. A HomeBuyer’s Report is standard for most properties. A full structural survey is worth the extra cost for properties over 50 years old, listed buildings, or anything with visible cracks or extensions. Book it early because surveyors are often booked weeks ahead.
Gather every document your lender and solicitor will ask for
Your lender will want three months of payslips, bank statements, and proof of deposit source. Your solicitor will want ID, proof of address, and source-of-funds evidence. The full mortgage application checklist includes everything from P60s to SA302 tax calculations for self-employed buyers. Have digital copies ready so you can send them within hours, not days.
Prepare for exchange and completion
Exchange happens when both solicitors swap signed contracts. You’ll need to transfer your deposit to your solicitor’s client account a few days before. Completion is usually set for one to four weeks after exchange. On completion day, your solicitor transfers the remaining funds, the seller’s solicitor confirms receipt, and the estate agent releases the keys. You then need to set up utilities, council tax, and redirect your mail. If you’re moving into a property with existing services, understanding utility connections when buying in the UK can save you from arriving to a cold house with no internet.
Leasehold properties: expect extra time and cost
If you’re buying a leasehold flat, the management company must provide a leaseholder pack with details of ground rent, service charges, and any major works planned. This pack can take weeks to arrive and often costs £200–£400. Your solicitor will also need to review the lease terms for restrictions on pets, subletting, or alterations. Leasehold purchases typically add two to four weeks to the conveyancing timeline.
Frequently Asked Questions
Can I switch mortgage lender after my offer is accepted? ▾
What happens if the survey finds major problems? ▾
How long is my mortgage offer valid? ▾
Do I need buildings insurance before exchange? ▾
What’s the difference between exchange and completion? ▾
Can the lender pull out after issuing the mortgage offer? ▾
Why the Weeks After Approval Matter Most
The gap between mortgage approval and completion is where purchases succeed or fall apart. Delays in document submission, unexpected survey findings, or a last-minute credit check can all sink a deal that looked solid. The buyers who get through smoothly are the ones who treat this phase with the same urgency as the house hunt itself. Every document sent early, every fee budgeted for, and every question asked upfront reduces the chance of a costly surprise.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read Essential House Inspection Checklist Tips for Buying a House.
Sources and Further Reading
Avoid Flood Pitfalls When Buying a House in the UK — Flood risk is one of the most overlooked issues in property searches. This guide explains how to check flood maps and what it means for insurance and resale value.
We Move Together (2024). UK House Buying Checklist. 🔗
Moneyflair (2024). Mortgage Application Checklist UK. 🔗
Barclays (2024). What Happens After My Mortgage Offer Is Issued? 🔗
