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Property Viewings Done Right: What to Check on the Roof, Basement, Windows, Heating, and Electrics

27 July 2026 · L&B Immobiliya

A viewing is not a leisurely stroll through nice-looking rooms. It's your chance to spot problems before you're contractually committed. Buyers who focus only on the parquet flooring, ceiling height, and the view from the balcony often miss exactly the things that turn out to be expensive later. With a bit of preparation and the right sequence, you can get far more out of every property viewing.

Why a Structured Viewing Makes All the Difference When Buying Property

Most buyers are guided by the overall feel of a home – understandable, since you want to feel comfortable there. But dry masonry, functioning technical systems, and solid structural quality aren't things you notice at first glance. So work through the property in a fixed order: outside to inside, top to bottom. This way you'll miss less, and you'll come across as more knowledgeable to sellers and agents – which can certainly pay off later when it comes to price negotiations.

The Roof: The First Glance from Outside Tells You a Lot

Take a good look at the roof before you even ring the doorbell. Sagging lines, missing or shifted tiles, moss-covered patches – all of these hint at the roof's age and condition. Ask when the roof was built and whether it has ever been renovated. Inside the attic, check the underside as well: water stains on the rafters or insulation, a musty smell, dark discoloration on the sarking membrane. Especially in summer, if the attic feels unusually hot, that's often a good indicator of how well – or poorly – the insulation is actually performing.

The Basement: Dampness Gives Itself Away Through Smell

In the basement, your nose rarely lies. A musty, earthy smell often points to rising damp or leaking waterproofing, even if everything looks dry at first sight. Watch for salt efflorescence on the walls, flaking plaster, and cracks near the foundation. Ask directly whether the basement has ever flooded – hardly a rarity given the heavy rainfall events of recent years. It also helps to check the height of the windows and light wells: if they sit very low, the risk increases during heavy rain.

Windows and Doors: The Installation Year Says More Than Looks

New-looking windows may look great, but they say nothing about the insulation performance of the house as a whole. Check whether they're double- or triple-glazed, whether the frames close tightly, and whether there are traces of condensation or mould around the reveals. In winter, run your hand along a closed row of windows – if you feel a draught, the seals are worn out. Ask when the windows were installed; sellers can usually give you a specific answer, and it's a good indicator of upcoming investment needs.

Heating: Age, Maintenance, and Future Requirements to Keep in Mind

The heating system is one of the most expensive items in any renovation. Ask about the age of the boiler, when it was last serviced, and whether a hydraulic balancing (adjusting the flow rate in each radiator for even heat distribution) has been carried out. A glance at the nameplate often reveals more than the seller is willing to volunteer. For older oil or gas heating systems, it's also worth asking which modernisation obligations might apply in the coming years – this affects not just comfort, but also the property's resale value.

Electrics: The Underestimated Risk Behind the Socket

Hardly any buyer opens the fuse box during a viewing – yet it reveals a lot. Old screw-in fuses instead of modern circuit breakers suggest an outdated electrical installation. Ask when the wiring was last renewed or inspected. Too few power outlets, visible cables running along the wall surface, or a fuse box dating back to the seventies are clear signs that work – and budget – will be needed before you can move in.

The Right Questions to Ask the Seller

Sellers are legally required to disclose known defects – but they don't have to volunteer everything. That's why it pays to ask targeted questions:

Write down the answers. Contradictory or evasive responses are information in themselves.

When a Surveyor Is Genuinely Worth the Cost

Not every purchase requires an expensive expert report. For a renovated new-build flat with complete documentation, a trained eye is often enough. It's different with older existing properties, visible cracks, signs of damp, or if the seller seems noticeably reluctant to answer certain questions. Even if you have little construction experience yourself, or you're investing a significant sum, an independent building surveyor is usually worth the fee – especially compared to a renovation bill that catches you off guard after the Notar (notary, the neutral legal professional who certifies German property sales) appointment. A second viewing with an expert in tow is entirely normal and reputable sellers won't take it as a sign of mistrust, but simply as a standard part of the buying process.

If you're unsure whether a property justifies this extra effort, our property listings often already include documentation that answers the first questions. And if you're planning to sell and want to know what buyers will be looking for during a viewing, take a look at our Selling page.

Making the Right Decision, Calmly and Systematically

A good viewing takes time – plan for a full hour, not just twenty minutes squeezed between other appointments. Visit in daylight, ideally not on a rainy November afternoon, but at a time when you can actually see the details clearly. Take photos, note anything unusual on the spot, because after three more viewings, details tend to blur together. Going about it systematically won't necessarily get you a cheaper price, but it will get you a far better-informed one – and that pays off over the years.

At L&B Immobiliya, we've been guiding clients through exactly this process since 2009 – from the first viewing through to the Notartermin (notary appointment), in German, English, or Russian. If you'd like support reviewing a property or a free assessment, feel free to reach out via our contact page. You'll also find an overview of our services there.

Insights on property in Berlin and across Germany – L&B Immobiliya, Berlin. Contact →

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