Technical survey before buying property abroad

You can read a contract and check a registry from afar, but you cannot see cracks in a wall, damp behind a wardrobe or a sagging roof beam in photos. A technical survey is the step that turns a nice listing into a known condition. This guide explains what it covers, who does it, when it is worth the cost and how to use the result.

What buyers fear

Buyers fear paying for a property and then discovering structural problems, hidden damp, a leaking roof, outdated electrics or costly repairs that the seller or agent never mentioned. When you buy remotely this fear is stronger, because nobody you trust has stood in the building.

What the risk really is

In most countries the buyer has a duty to inspect, and the seller's liability for visible defects is limited. Contracts of sale of used property are often "as seen" in practice, and rights to claim for hidden defects, where they exist, are narrow, time-limited and hard to enforce from abroad. A survey is therefore a protection that you buy for yourself. It does not make a property perfect; it tells you the condition and the likely cost of repairs before you commit.

For new buildings the situation differs, because the developer owes you the completed work and defects fall under construction warranties. See snagging and handover: inspecting a new apartment abroad. This guide mainly concerns resale properties, houses, villas and ruins.

What a survey covers

• Structure: foundations, load-bearing walls, cracks, settlement, signs of movement, floors and ceilings, wooden beams (rot and insects).
• Damp and water: rising damp, condensation, leaks from pipes or the roof, mould, drainage around the building, the state of terraces and balconies.
• Roof: tiles or membrane, flashing, gutters, insulation, attic condition.
• Electrics: age of wiring, the fuse board, earthing, compliance with current norms.
• Plumbing and heating: pipes (old lead or corroded metal), boiler, heating, hot water, septic tank or sewer connection.
• Windows, doors and insulation: condition, thermal and sound performance.
• Asbestos: older roofs, pipes and cladding may contain asbestos-cement; the survey should note suspect materials and recommend lab testing before work.
• Energy certificate: most EU countries require an energy performance certificate (EPC) when a property is sold or let. Check that it exists, is valid and consistent with the actual building, since it signals running costs and upcoming renovation duties.
• Legal match with the building: whether extensions match the permits. See illegal construction and missing permits when buying abroad.
• Common parts of apartment buildings: facade, lift, shared roof and the reserve fund of the community of owners.

Who performs it, by country

The title and legal status of the person differ by country, and in some places the survey is a recognised professional report, in others it is a private inspection. At a high level:

Spain. A technical architect (arquitecto técnico, also called aparejador) or an architect usually prepares an inspection report. Many municipalities also require periodic building inspections (ITE or similar) for older buildings; ask whether the building has one and what it found.

Italy. A geometra (surveyor) or an engineer or architect is the usual choice; the same professional often checks permits, cadastre and building condition.

Portugal. An engineer (engenheiro civil) or architect performs the inspection; ask for a written report with photos.

United Kingdom. A chartered surveyor under the standards of RICS (Royal Institution of Chartered Surveyors) is a common route; see the RICS website. RICS-style surveys exist in several other markets too, particularly in expat-heavy areas.

Germany. An independent building expert (Bausachverständiger or Gutachter) can examine the house and prepare a report. Choose someone who is not tied to the seller or the agent.

Elsewhere, such as Greece, Cyprus, Bulgaria, Turkey, Montenegro or Thailand, a licensed civil engineer or architect is usually the appropriate person. Independence is the key: a survey ordered and paid for by you, not by the seller, developer or agent.

When a survey is essential

• Old buildings, especially before modern building codes and with original wiring and pipes.
• Villas and houses with land: roofs, septic systems, retaining walls, pools and drainage.
• Ruins and houses to renovate: a survey informs the renovation budget. See renovating property abroad and the guides on abandoned houses.
• Properties with visible signs of damp or cracks, or sold very cheaply compared with neighbours.
• Properties with extensions, converted attics or enclosed terraces.
• Coastal, mountain or flood-prone locations. See natural hazard risks when buying property abroad.
• Apartments in older buildings: the building as a whole, not only your unit.

For a modern flat in a well-managed building a short visual inspection may be enough; for anything old or with land a fuller survey is advisable.

Cost

Fees depend on the country, the size of the property and the type of report, and we have not verified current price lists. Ask for a written quote that states the scope (visual only or with measurements and tests), the deadline and the format of the report. In relation to the purchase price the cost is generally small, and the cost of an unseen problem can be much larger.

How to commission it remotely

• Choose the surveyor yourself or through your independent lawyer; do not use someone proposed by the seller or the agent.
• Send the surveyor the listing, the registry extract, the permits and any previous reports in advance.
• Ask what is included: attic and roof access, crawl space, photos, moisture readings, thermal imaging, electrical test.
• Ask the surveyor to attend with a video call at the end, or ask a trusted representative to be present.
• Request a written report in a language you can use, with photos, a list of defects ranked by urgency and a rough cost range for repairs.
• Order the survey before the final contract and, if possible, before paying a non-refundable deposit. A contract condition (a survey clause) can allow you to withdraw or renegotiate if serious defects are found.

Using the findings in negotiation

• Separate defects into safety or structural issues, major repairs, and cosmetic items.
• Get at least one quote from a local contractor for the main items, so the price reduction is based on numbers and not feelings.
• Ask for a price reduction, a repair by the seller before the deed, or a retention of part of the price. Put the agreement into the contract.
• If the problems are serious (structure, legality, asbestos in poor condition), be ready to walk away. A cheap property with a big hidden repair bill is rarely cheap. See total cost of ownership abroad.

When to involve a lawyer

Involve a lawyer when the survey shows missing permits, structural defects that conflict with the seller's statements, or when you want a survey clause or retention inserted in the contract. Read also how to read a property purchase contract abroad and the pre-purchase checklist.

FAQ

Is a survey mandatory when buying abroad? Usually not, but it is the best protection for older properties and houses. Banks may also require a valuation, which is not the same as a technical survey.

Is a bank valuation enough? No. A valuation estimates market value for the lender and rarely lists defects in detail.

Can I rely on the seller's report? Treat it as information only. Commission your own, independent of the seller and the agent.

Does a survey find everything? No. It is non-invasive in most cases and cannot see inside walls or underground. It reduces uncertainty; it does not eliminate it.

Who pays? Normally the buyer. Ask the seller to share earlier reports, but order your own.

How we help

We are a trilingual platform that finds properties and coordinates independent local lawyers, technical specialists and tax advisers, including for remote orders of a survey. This text is informational and is not legal, tax or investment advice; rules and professional titles differ by country, so verify them locally with your adviser.