A pre-purchase survey is the single best money you spend when buying a used boat: it finds the expensive problems you cannot see and gives you the evidence to renegotiate or walk away. This checklist explains what a good survey should cover, how to choose the surveyor, and how to read the report — so you go into the process knowing exactly what you are paying for.
Why a survey matters (and when you can skip it)
On any used boat above a modest value, a survey pays for itself many times over — in problems found, in negotiating room, or in the peace of mind of a clean report. It is also usually required by insurers and lenders. The only times you might skip it are a very cheap boat you can afford to write off, or a brand-new boat under warranty (and even then a commissioning check is wise).
Choosing the right surveyor
Use an accredited, independent surveyor who specialises in your type of boat — sailing yacht, motor yacht or multihull — and who does not have a relationship with the seller or broker. Ask for a sample report and check their accreditation. You are paying for judgement and independence, so do not let the seller choose the surveyor for you.
Hull and structure
The core of the survey. Expect the surveyor to check the hull below the waterline for osmosis and take moisture readings, inspect the keel and keel-to-hull joint for grounding damage and movement, look for stress cracks and delamination (especially around high-load areas and, on catamarans, the bridgedeck), and sound the hull for voids in cored construction. This is why a haul-out matters.
Deck, fittings and windows
Above the waterline: moisture in cored decks (soft or springy spots), the bedding and integrity of deck fittings, stanchions and guardrails, the condition of hatches and windows and their seals, and the state of any teak decking — recaulking or replacing teak is a major expense worth knowing about before you buy.
Rig and sails (sailing yachts)
On a sailing yacht, the standing and running rigging, mast and fittings, furling gear and the age and condition of the sails. Standing rigging has a service life and a re-rig is a significant bill, so its age is a key negotiating point. A rig inspection may need the mast unstepped for a full check on older or higher-value boats.
Engine, drivetrain and mechanical
The engine and gearbox or saildrive: hours, service history, visible condition, and starting and running under load on the sea trial. For a fuller picture, add an oil analysis and, on higher-value boats, a specialist mechanical survey. Check shafts, propellers, saildrive seals and anodes, and — on twin installations — compare hours and condition side to side.
Systems: electrics, plumbing, gas and steering
The unglamorous but expensive-to-fix systems: the electrical installation and batteries, plumbing and through-hulls, the gas installation, steering and thrusters, and on larger boats the generator, air-conditioning and watermaker. A lot of a boat’s value and reliability lives here, so make sure the surveyor tests, not just eyeballs, what they can.
Safety gear and compliance
Firefighting and gas safety, bilge pumps, navigation lights, the state of safety equipment, and — for the boat’s status and resale — CE marking and any relevant compliance. A survey is also the moment to build your list of safety gear to add or replace before the first season.
The sea trial
Never buy without running the boat on the water. Check that the engine reaches full rated RPM under load and holds temperature, that it manoeuvres and steers properly, that (on a sailing yacht) the sails set and the rig behaves, and that electronics and systems work underway. Many faults only appear when the boat is working — the sea trial is where they surface.
Reading the report and renegotiating
A good report separates urgent, safety-critical items from routine maintenance. Use the serious findings to renegotiate the price or ask the seller to fix them before completion — or to walk away if the boat is worse than described. That leverage is exactly what you paid the surveyor for.
Costs and timing
A survey typically costs from a few hundred euros on a small boat to a few thousand on a larger yacht, plus the haul-out and sometimes an engine survey and oil analysis on top. Book it after your offer is accepted “subject to survey”, allow time for the haul-out and sea trial, and treat the cost as insurance against a far bigger mistake.
Häufig gestellte Fragen
Typically from a few hundred euros for a small boat to a few thousand for a larger yacht, usually priced by length, plus the cost of hauling out and any extras like an engine survey or oil analysis. Against the price of the boat and the problems it can uncover, it is inexpensive insurance.
Yes — on any used boat of real value. A surveyor finds structural, mechanical and safety issues you cannot see, and insurers and lenders often require it. The report also gives you the evidence to renegotiate or walk away, which frequently saves more than the survey costs.
The buyer pays, because the survey is for your protection and you choose an independent surveyor. The buyer also normally arranges and pays for the haul-out and sea trial. Never let the seller supply the surveyor.
A proper pre-purchase survey needs the boat hauled out, because the most important checks — osmosis, moisture readings, keel, through-hulls and the underwater hull — cannot be done in the water. Pair the haul-out with an in-water sea trial for the full picture.
A thorough survey usually takes most of a day for a typical yacht, plus separate time for the haul-out and the sea trial, and a few days afterward for the written report. Build that into your timeline when you make an offer subject to survey.
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