That freshly painted lounge may look ready for the keys, but paint is famously good at keeping secrets. When you are working out how to check property condition, the aim is not to find a flawless home – especially in South London, where period conversions, Victorian terraces and 1930s semis come with character as standard. The aim is to separate ordinary maintenance from defects that could turn your moving budget into a very expensive plot twist.
A viewing gives you a useful first impression, not a diagnosis. You can spot clues, ask better questions and decide whether the property deserves closer scrutiny. A RICS survey then provides the professional assessment needed to understand what you are really buying.
Start before the viewing
Good condition checks begin before you reach the front door. Read the listing closely, but do not mistake phrases such as “full of potential”, “requires modernisation” or “in need of some TLC” for harmless estate-agent poetry. They may simply mean dated décor. They may also mean substantial work is required. Ask what has been done recently and what has not.
For a flat, establish the lease length, service charge, ground rent if applicable, and whether major works are planned. A beautifully presented kitchen is less comforting if the block needs roof repairs and a large service charge demand is waiting in the wings. For a house, ask about the age of the roof, boiler, windows, electrical installation and any extensions or loft conversions.
Bring your phone, a small torch and a short list of questions. You are not there to conduct a building survey in trainers, but you do want to notice the things that are easy to miss while admiring the bay window.
How to check property condition at a viewing
View the property twice if you can. The first visit often involves measuring rooms in your head and imagining where the sofa will go. The second is for slowing down, looking up, looking down and checking the less glamorous corners. If possible, visit in daylight. A rainy day can be particularly revealing for drainage, damp smells and gutters, although nobody needs to schedule a storm for the occasion.
Look outside first
The exterior tells you a great deal about how a property has been maintained. Stand back and look at the roofline. Are tiles or slates missing? Does the roof sag? Are chimney stacks leaning, cracked or poorly pointed? Replacing a few slipped tiles is one thing; widespread roof deterioration is another.
Check gutters, downpipes and external walls. Overflow marks, staining and vegetation growing from gutters suggest water has not been directed away properly. On brickwork, look for cracked render, damaged pointing and cracks that run diagonally from windows or doors. Hairline cracks in plaster can be cosmetic, particularly in older homes, but wider or stepped cracks in brickwork deserve professional attention.
Also take note of the ground level. External soil, paving or decking should generally sit below the damp-proof course. If it bridges that barrier, moisture can find a route into the building. A charming patio should not be quietly holding hands with the wall at the wrong height.
Follow the signs of moisture indoors
Damp is not one single problem. It can arise from leaks, defective gutters, condensation, rising damp, poor ventilation or ground levels. The cause matters, because the remedy and cost can be completely different.
Look for tide marks, peeling paint, discoloured patches, crumbling plaster and a musty smell. Pay particular attention to external corners, window reveals, ceilings beneath bathrooms and areas around chimney breasts. Fresh paint in one isolated area is not proof of a defect, but it is a fair reason to ask what was repaired and why.
In kitchens and bathrooms, open cupboards beneath sinks and look around shower trays, toilets and pipework. Check whether extractor fans are present and working. Condensation is common in London homes, especially where ventilation is limited, but persistent mould should not be dismissed as a tenant or owner simply forgetting to open a window.
Test what a buyer can reasonably test
Turn on taps and flush toilets. You are checking water pressure, drainage and whether anything leaks or makes alarming noises. Run the shower briefly if the viewing allows it. Slow drainage can be a small blockage, but it may also point to issues with pipework.
Open and close windows and external doors. Sticking can result from paint build-up or seasonal movement, but it can also indicate distortion. Look for failed double-glazed units, where moisture sits between panes, and for rotten timber frames. Check whether locks operate, particularly on ground-floor windows and doors.
Ask to see the boiler, then note its age and service history. A boiler that looks elderly is not automatically doomed, but replacement is a cost worth factoring into your offer and plans. You should not remove electrical covers or attempt technical tests. Instead, look for dated consumer units, loose sockets, exposed wiring or a lack of recent electrical certification. Electrical safety requires a qualified inspection, not confident guesswork.
Do not skip the loft, cellar or communal areas
If access is available, look into the loft. Use your torch and check for daylight through the roof, water staining, inadequate insulation and signs of timber decay. Avoid walking across ceiling joists or moving stored belongings. That is a fast route from sensible buyer to awkward apology.
Cellars and basements need especially careful thought. A dry-looking converted basement is reassuring only if it has appropriate waterproofing, ventilation and a history that supports the finish. Ask whether there is a guarantee for any tanking work and whether it can be transferred.
For flats, inspect the communal hallway, stairwell, entrance, bin storage and any visible roof areas from outside. These spaces are jointly owned and jointly paid for. Poor upkeep can indicate that future maintenance costs are likely, even if your particular flat looks immaculate.
Ask questions that get useful answers
Sellers are not expected to provide a technical diagnosis, but their answers can help you build a picture. Ask whether there have been leaks, flooding, drainage problems, subsidence, Japanese knotweed, insurance claims or disputes with neighbours. Ask about alterations and whether the relevant approvals and certificates are available.
It is also sensible to ask which items will remain, whether the property is occupied, and why the seller is moving. Keep the conversation polite and factual. You are gathering information, not staging a courtroom drama over a suspicious patch of magnolia paint.
If the property is old, altered or visibly tired, ask when key components were renewed. Roof coverings, windows, electrics, plumbing and heating all have different lifespans. A home can be perfectly liveable while still requiring a realistic maintenance budget over the next few years.
Know what a viewing cannot tell you
A viewing cannot confirm the condition of concealed timbers, drains, foundations, insulation, electrics or pipework. Nor can it reliably establish the cause of cracking or damp. Even experienced buyers will not see every issue in a 30-minute appointment, especially when a room is furnished, a loft hatch is sealed or the weather is dry.
This is where the right survey earns its keep. A RICS Level 2 Home Survey is often appropriate for a conventional property in reasonable condition. It highlights significant defects and provides clear traffic-light ratings. A RICS Level 3 Building Survey is more detailed and is usually the better choice for older, larger, altered, unusual or visibly neglected homes. It gives fuller advice on construction, defects, likely causes and repair considerations.
Neither survey is a magic wand, and no survey can see through every wall or beneath every floor. But it gives you independent evidence before you commit. That can mean renegotiating the price, asking the seller to address an issue, budgeting properly or walking away before a manageable purchase becomes an unmanageable project.
Turn observations into a sensible decision
Try not to panic at every imperfection. Most homes have a list: tired sealant, worn carpets, cracked tiles, a fence that has seen better summers. Focus on defects that affect safety, weatherproofing, structure, drainage and major building services. Then consider the property’s age, price and your appetite for works.
A £10,000 repair may be acceptable if the purchase price and your plans account for it. The same repair is a very different proposition if it leaves no contingency after deposit, legal fees and moving costs. Obtain specialist quotations where a survey recommends them, particularly for roofing, damp, drainage, electrics, heating or structural concerns. Quotes turn vague worry into numbers you can use.
Buying a home is emotional. It is also one of the largest financial decisions most people make. Keep the charm, enjoy the potential and take the exposed brick with a pinch of salt. Just make sure the condition has been checked with clear eyes before you make it yours.