Start With a Slow Walk Around the Outside

Before you fall for a kitchen or a south-facing garden, give the property a proper look from the outside. Walk the perimeter slowly, ideally on a dry day and then again after rain if you can manage it. Look at the brickwork or render for cracks wider than a 10p piece, particularly around window and door openings. Fine hairline cracks in old render are usually cosmetic; diagonal cracks that step along the mortar joints, or cracks that widen towards the top or bottom of a wall, deserve a professional opinion.

Check the pointing between bricks, the condition of any cladding or pebbledash, and whether the walls bulge or lean. Run your hand along an external wall — if it feels cold and damp, or if paint is flaking and blowing, water is getting in somewhere. Look at ground levels too. If the outside path or patio sits higher than the internal floor level, rainwater can track towards the house rather than away from it, which is a common cause of damp later on.

Look for Damp, Condensation and Subsidence

Damp is the single most common hidden cost in older UK housing, and it rarely announces itself politely. Inside, look for tide marks on walls, blistering paint, a musty smell in cupboards and under stairs, and dark patches behind furniture that has been pulled away from the wall. Press the back of your hand against suspect plaster — it should feel cool but dry, not clammy.

• Rising damp usually shows as a stain up to about a metre high, often with a salty, crumbling skirting board.
• Penetrating damp tends to appear around windows, chimneys and blocked gutters, and gets worse after heavy rain.
• Condensation is the most common of all — black mould in corners, on ceilings and around window frames, often in homes with poor ventilation.
• Subsidence can show as cracks that are wider at one end, doors and windows that stick, or gaps opening up where an extension meets the original house.

None of these are automatically deal-breakers, but each has a remedy with a price tag attached. Knowing roughly which one you are dealing with lets you negotiate rather than guess.

Roof, Gutters and Drainage

Roofs are expensive and largely invisible from the ground, so look up and use binoculars if you can. Ask about the age of the roof covering. A well-maintained slate or tile roof can last fifty years or more; a flat felt roof may need replacing every fifteen to twenty. Sagging lines, slipped or missing tiles, rusted valleys and crumbling mortar on the ridge are all signs that maintenance has slipped.

Then follow the water. Check that gutters are clear, properly aligned and not leaking at the joints, and that downpipes discharge into drains rather than straight onto the wall. Look for green staining on render, which tells you water has been running down it for years. If the property has a cellar, a basement or a low-lying garden, ask whether it has ever flooded and check with the Environment Agency flood map for the postcode.

Match the Price to the Age and Construction

Older properties come with character and with quirks. A Victorian terrace may have solid brick walls with no cavity, meaning it will be colder and harder to insulate than a 1990s build. A 1960s or 1970s house may have been built with a non-traditional method, and a few of those systems are mortgage-lenders' red flags. If the property has a thatched roof, timber frame, or a large amount of glass, insurance and maintenance costs will be higher.

Ask straightforward questions and listen for hesitation: how old is the boiler, when was the wiring last checked, is there a current gas safety certificate, and has the property been extended or converted? Lenders and solicitors will ask these too, so getting ahead of them saves weeks. If a loft conversion, rear extension or conservatory exists, ask to see building regulations sign-off — it matters both for safety and for resale.

Assess the Area as Carefully as the House

A perfect house in the wrong spot is still the wrong house. Visit at different times of day and on a weekend. Check parking in the evening, noise from nearby roads, pubs or railway lines, and mobile signal indoors. Look at what is within a fifteen-minute walk: a shop, a GP surgery, a primary school, a bus stop or station. School catchment areas shift, so check the local authority's current admissions information rather than relying on what an estate agent tells you.

It is also worth checking the wider picture: planned developments nearby, conservation area or listed building status, and whether the road is adopted by the council or privately maintained. These details affect everything from how easily you can extend to what you pay for upkeep.

Bring in a Surveyor Before You Commit

The most valuable money you will spend in this process is a few hundred pounds on a proper survey. A RICS HomeBuyer Report suits most conventional homes, while a full building survey is worth it for older, listed, extended or visibly tired properties. A good surveyor will get into the loft, lift the drain covers where possible, test for damp with a meter and tell you plainly what needs doing now, what can wait, and what might become a serious problem in five years.

Use the report as a negotiating tool, not just a scare sheet. Get quotes for any significant work before you exchange contracts, and make sure your solicitor has raised all the searches — local authority, drainage, environmental and, where relevant, mining or chancel liability. An offer is only as sound as the information behind it, and a little diligence now is far cheaper than a surprise in your first winter.