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Before you buy an older villa: what an engineering inspection checks

What an engineer looks at before you buy an existing villa: structure, roof and waterproofing, damp, services, unauthorised additions and documents.

Nation engineering team · · 2 min read


In short

An engineering inspection before buying an older villa checks what a viewing cannot: the structural condition of the frame and slabs, the roof and waterproofing, signs of damp and corrosion, the state of services, and whether extensions and annexes were approved. It turns surprises after purchase into known costs before it.

Key points

  • Ask for the drawings and permits; compare what exists with what was approved.
  • The roof, waterproofing and wet areas are where water damage starts.
  • Cracks, spalling and rust stains on concrete need explaining before you commit.
  • Extensions and annexes built without approval can delay a sale, a permit or a connection later.
  • A written report lets you negotiate, budget repairs, or walk away with reasons.

Buying an older villa is buying its history. A viewing shows the finishes; an engineering inspection shows the building behind them. The aim is simple: turn surprises after purchase into known facts before it.

Documents first

Ask for the drawings, permits and any completion documents. Comparing them with what stands on the plot reveals changes: an added room, a closed terrace, an annex in the garden. Additions built without approval can stand in the way of a later sale, a permit or a utility connection, and may need legalization.

The structure

The inspection looks at the frame and slabs wherever they can be seen: cracks, spalling concrete, rust stains, deflection, and signs of past repairs. Our guide to cracks explains which ones matter.

Roof, waterproofing and wet areas

Water causes most damage in villas, and it usually starts at the roof, in bathrooms and kitchens, and around tanks and pipes. Damp patches, stains, blistered paint and corroded fixings are recorded and traced.

Services

The visible condition of plumbing, drainage, electrical installations and air-conditioning is noted, with recommendations for specialist testing where needed.

The report

The result is a written building safety report with findings and prioritised recommendations. It gives you three options with reasons: buy as is, negotiate with a budget for repairs, or walk away.

To arrange an inspection, send us the villa’s location and the timing of your purchase.

Questions

When should the inspection happen?

Before you commit, ideally with time to act on the findings: to negotiate, to get repair estimates, or to reconsider.

Can you inspect a villa that is occupied?

Yes, with the owner's agreement and access arranged. Some areas may be limited by furniture and finishes; the report notes what could not be seen.

The service · 04 Building Safety Report Comprehensive building safety reports to assess the structural condition, integrity, and overall safety of existing buildings.

Discuss your project

Tell us about the building and what you need. An engineer will reply.