I’ve been writing about UK property for long enough to notice a pattern: most buyers walk into a house, fall in love with the kitchen, and forget to check whether the roof is about to collapse. It’s not their fault — estate agents are good at distraction. But the numbers don’t lie. Around 37% of homeowners regret something about the home they bought. That’s more than one in three people stuck with a problem they could have spotted before exchanging contracts. A proper house inspection checklist is the only way to avoid joining them.
Most people treat viewings like a quick walkthrough. They check the taps, admire the garden, and assume the survey will catch everything. But a standard survey has limits. It won’t tell you whether the boiler is about to die, whether the wiring is a fire risk, or whether the garden has Japanese knotweed. That’s why you need your own checklist — and the discipline to use it. Here’s what you actually need to know.
If you’re early in the process, you might also want to read about essential considerations when buying a house in the UK before you start booking viewings. It covers the legal and financial side that this checklist doesn’t touch.
What a House Inspection Checklist Actually Covers
Let’s be clear about what a house inspection checklist is not. It’s not a substitute for a professional survey. A qualified surveyor will use thermal imaging, moisture meters, and sometimes drones to spot problems you can’t see. But a survey happens after you’ve already made an offer. Your checklist is what you use before that — during viewings — to decide whether the house is worth pursuing at all.
What I tend to notice is that first-time buyers skip the boring stuff. They measure the bedroom for their bed but never check whether the loft is insulated. They admire the garden but don’t ask whether the trees are close enough to cause subsidence. A good checklist forces you to look at the things that cost money, not the things that look nice.
Why Most Buyers Miss the Expensive Problems
The biggest risk isn’t a cracked wall or a dated kitchen. It’s the stuff you can’t see until you’ve already moved in. Foundation issues are the most expensive problems a home can have — even small cracks can indicate movement that affects the entire structure. Fixing a foundation crack can cost anywhere from £4,500 to £25,000, and it can affect your ability to get insurance or sell the property later.
Consider this scenario: you find a Victorian terrace that looks perfect. The decor is fresh, the garden is south-facing, and the price is right. But the survey later reveals that the roof is 25 years old, the electrical panel is a Federal Pacific (which many insurers won’t cover), and the plumbing is polybutylene — a grey plastic pipe that was common between 1978 and 1995 and is prone to sudden failure. Suddenly, that “perfect” house needs £20,000+ of work you didn’t budget for.
Regional differences matter too. In older parts of the UK, you’re more likely to find outdated wiring, lead pipes, and asbestos. In newer builds, the risks are different — poor insulation, shoddy workmanship, and ground heave. Your checklist needs to adapt to the property type and location.
My advice? Treat every viewing like a forensic investigation. Bring a notebook, a torch, and a camera. Take photos of everything — cracks, damp patches, the boiler make and model, the fuse box. You won’t remember the details an hour later, and you’ll need them when you’re comparing properties.
Where People Go Wrong During Viewings
Most buyers make the same mistakes. Here are the four most common ones, backed by research, and how to avoid them.
Ignoring the Exterior and Roof
First impressions matter, but not for the reason you think. The exterior tells you how well the house has been maintained. Water being directed away from the foundation is the #1 cause of structural problems. If the gutters are blocked, the downspouts are dumping water against the wall, or the ground slopes towards the house, you’re looking at future damp and foundation issues.
Check the roof from ground level. Are there any damaged or loose tiles? Is the chimney straight? Look at the fascias — the bands under the edge of the roof — for rot or damage. If the house has large trees close by, ask whether they’ve caused any subsidence issues. A Wi-Fi water leak detector is a cheap way to monitor for leaks after you move in, but it won’t help if the roof is already failing.
Overlooking the Plumbing and Electrical Systems
Plumbing issues range from minor (a dripping tap) to catastrophic (a main sewer line replacement costing £5,000–£15,000). Polybutylene plumbing — grey plastic pipes common in homes built between 1978 and 1995 — is prone to sudden failure. Many insurers won’t cover homes with it. If you see grey plastic pipes under the sink, that’s a red flag.
Electrical problems are equally serious. Outdated panels or wiring can cost £3,000–£10,000+ to upgrade and may affect insurance eligibility. Federal Pacific and Zinsco panels are particular red flags — some insurance companies won’t cover homes with them at all. Check the fuse box. If it has fuses instead of breakers, or if it looks like it hasn’t been touched since the 1970s, budget for a replacement.
Failing to Check the Attic and Insulation
The attic reveals the roof condition from below, ventilation adequacy, and insulation levels that affect energy costs. Roof sheathing condition, rafter/truss condition, and signs of leaks or water damage are all visible from the loft. If the bathroom fan ducting doesn’t exit to the exterior, you’re pumping moisture into the roof space — a recipe for mould and rot.
Check the insulation depth. In the UK, you want at least 270mm of loft insulation. If it’s less than that, your heating bills will be higher than they need to be. And look for pest evidence — droppings, nests, or chewed wood. Mice and squirrels can cause significant damage.
Not Asking the Right Questions
Most buyers forget to ask about the things that affect daily life. Is there private parking? A garage? Will you need a parking permit? Are there working burglar alarms and fire alarms? What’s the mobile phone coverage like? Is the house a listed building or in a conservation area? What council tax band is it? These aren’t minor details — they affect your monthly costs, your insurance, and your quality of life.
If you’re looking at a property in a conservation area, you may need permission for even minor changes like replacing windows or painting the front door. Listed buildings have even stricter rules. A property lawyer can help you understand the legal implications before you commit.
→ Scroll right to see all columns
| Issue | Repair Cost Range | Can You Spot It? |
|---|---|---|
| Foundation cracks | £4,500 – £25,000+ | Yes — look for horizontal or stair-step cracks |
| Roof replacement | £8,000 – £25,000+ | Yes — check for curling shingles, granule loss |
| Outdated electrical panel | £3,000 – £10,000+ | Yes — check the fuse box brand and type |
| Polybutylene plumbing | £4,000 – £15,000+ | Yes — look for grey plastic pipes under sinks |
| HVAC replacement | £5,000 – £15,000+ | Partially — check the age and condition |
How to Use This Checklist When Viewing a Property
Writing about topics like this takes real time and research. If you buy something through an Amazon link on this page, I may earn a small commission — at no extra cost to you. It’s one of the things that makes it possible to keep BritWealth free to read. I only link to products that are genuinely relevant to the article.
You don’t need to memorise everything. Print this checklist, take it to every viewing, and tick off each item as you go. Here’s how to approach each area.
Start Outside and Work Your Way In
Begin with the exterior. Walk around the entire property and check the brickwork, window frames, roof, gutters, and chimneys. Look for cracks, damp, and loose tiles. Check the ground slope — it should direct water away from the foundation. If the garden has large trees, ask whether they’ve caused any subsidence issues. Look for signs of Japanese knotweed or uncontrolled bamboo, which can cause structural damage and are difficult to remove.
If the house has a garage, check the door operation and the auto-reverse safety feature. If there’s a deck or porch, check the structural condition and railings. A door alarm sensor is a cheap way to secure outbuildings after you move in, but it won’t help if the structure itself is unsafe.
Check the Foundation and Structure
Foundation issues are the most expensive problems a home can have. Look for visible cracks in the foundation walls — horizontal cracks or stair-step cracks in brick are the most serious. Cracks wider than 1/4 inch indicate structural movement. Check for bowing or leaning walls, evidence of water intrusion in the basement or crawlspace, and floor levelness. If the floors slope significantly, that’s a sign of movement.
Check the door and window frames. If they’re not square, the structure may have shifted. Look at the structural wood condition — rot, damage, or modifications that suggest someone has cut through load-bearing beams. If the house has a crawlspace, check the vapour barrier and ventilation.
Test the Plumbing and Electrical Systems
Turn on every tap. Check the water pressure — it should be between 40 and 80 psi. Flush every toilet. Check how quickly hot water comes through. Look under sinks for visible leaks. Ask about the age of the boiler and what condition it’s in. If the boiler is more than 15 years old, budget for a replacement.
Check the fuse box. Is it modern with circuit breakers, or does it have old-fashioned fuses? Look at the panel brand — Federal Pacific and Zinsco are red flags. Check for GFCI protection in wet areas (kitchen, bathroom, exterior). Test a few light switches and sockets. If the wiring looks old or frayed, that’s a concern.
A carbon monoxide alarm is essential for any home with gas appliances, but it won’t tell you whether the boiler is about to fail. That requires a professional inspection.
Inspect the Interior and Attic
Look for signs of mould, condensation, or damp in every room. Check the walls and ceilings for cracks, stains, and damage. Open and close doors and windows — do they operate smoothly? Check the flooring condition and levelness. In the bathroom, test the extractor fan, check the grouting and sealant, and flush the toilet to make sure it works properly.
Go into the attic. Check the roof sheathing condition from below, the rafter/truss condition, and the insulation type and depth. Look for signs of leaks or water damage. Check that the bathroom fan ducting exits to the exterior — if it just vents into the loft space, that’s a problem. Look for pest evidence.
If you’re buying a Victorian terrace, you might want to read this guide before committing to a Victorian terrace. These properties have their own unique issues — solid walls, no cavity insulation, and often outdated wiring and plumbing.
Frequently Asked Questions
Can I do my own house inspection instead of hiring a surveyor? ▾
What’s the difference between a home inspection and a survey? ▾
How long does a proper house inspection take? ▾
What should I do if I find a serious problem during a viewing? ▾
Can I negotiate the price after a survey reveals problems? ▾
▾
Your Next Step
The difference between a good purchase and a regretful one often comes down to what you notice before you sign. A proper house inspection checklist won’t guarantee a perfect home — no property is flawless — but it will stop you from buying someone else’s expensive problem. Print this guide, take it to every viewing, and use it. If this was useful, you might also want to read negotiation tactics that actually work for UK home buyers.
Sources and Further Reading
Mortgage Approved, Now What? Essential Post-Approval Checklist for UK Buyers — What to do after your mortgage is approved, including the steps between offer and completion.
Tips for Buying a House Near Family-Friendly Playgrounds in the UK — How to evaluate neighbourhoods and outdoor spaces when you have children.
Top Tips: Things Not to Forget When Viewing a Property. HomeOwners Alliance, 2024.
Home Inspection Checklist for First-Time Buyers 2026. HomeInspecto, 2025.
