Insuring Kok Grundel: cover and premium
motor yachts · several countries
Kok Grundel: dutch builder of motor cruisers. NAMMERT insures a Kok Grundel regardless of year built or where you bought it, liability, hull, legal expenses and personal accident cover from one house, taken out online in five minutes.
At a glance
Origin
several countries
Class
motor yachts
Typical sizes
8,8 to 11,4 m
Premium from
from €49 a year for liability
Worth knowing
Kok Grundel; cover, cost and conditions
The name Kok stands for the Scheepswerf Th. Kok in Vinkeveen, a village in the Netherlands. Theodorus Kok founded the yard in 1912, and it describes its work as traditional craftsmanship combined with modern technology. Two types are especially well known among Dutch boaters, the Kok Grundel and the Kok Kruiser, alongside the Motorgrundel, the Spitsgatkotter and further variants built in wood, polyester and steel. One Kok Grundel 900 from 1970 is described as a steel boat nine metres long and 3.10 metres wide, drawing only 80 centimetres with an air draft of 2.45 metres and suited to inland waters, lakes, rivers and canals. Those two figures say a lot about the intended home of these boats: Dutch inland water with its low bridges and shallow lakes.
Our model records hold two designs from the yard, both entered as motor yachts. The Kok Grundel 900 is listed for build years 1971 to 1977 and measures 8.75 metres. The Grundel Kotter follows from 1976 to 1983 and, at 11.4 metres, is clearly the larger boat. The two lines overlap only in 1976 and 1977, and the whole span runs from 1971 to 1983. Neither reaches the recent build years, so the youngest Kok in our list is now more than forty years old. The Grundel types numbered 1050, 1150 or 1250 and the Kok Kruiser range, which the yard also built, do not appear in our list.
With a steel motor cruiser of this age, the hull comes first. A survey with ultrasonic thickness readings shows where rust has thinned the plating, typically along the waterline, under the engine and in corners of the bilge where water collects. Look for bubbling paint inside lockers and behind panelling, since condensation in a steel hull works from the inside too. Anodes, the stern tube and the rudder fittings deserve a close look. Many of these boats spend their lives on canals and lakes, so their engines often have modest hours but may have stood idle for long periods; ask for a service history. Wiring that has been extended by several owners is worth tracing back to the panel.
Questions and answers
Frequent questions
Where is Kok based and since when?
The Scheepswerf Th.
Kok is based in Vinkeveen in the Netherlands and was founded in 1912 by Theodorus Kok.
Two of its well-known types are the Kok Grundel and the Kok Kruiser.
Which Kok design is the larger one?
The Grundel Kotter at 11.4 metres, listed in our model records for build years 1976 to 1983.
The Kok Grundel 900 measures 8.75 metres and is entered from 1971 to 1977.
The cover that fits
motor yacht insurance
Tariffs, cover and FAQ for motor yacht insurance in detail.
Third-party liability
The foundation for a boat from Kok Grundel: damage to third parties, worldwide,
from €49 a year for liability.
Hull cover
Partial or full hull cover for a Kok Grundel, at replacement value with an agreed fixed value.
For the whole class of boat
For Kok Grundel: What matters for motor yachts is the same across every brand; engine output,
how a claim is settled, cruising range and theft protection.
The class page lists every point and every brand in this class, Kok Grundel included.
Other builders in this class
Nautical information What counts before you cast off, papers, equipment, waters
Licence
A powerboat licence (inland or coastal) is required from 15 hp (11.03 kW).
Registration
Registration from 3 hp; for trips abroad carry the boat certificate or flag document.
Waters
Inland, coastal and abroad; plan fairways, bridge clearances, draught and tides.
Equipment
Lifesaving gear, fire extinguisher, anchor, signalling equipment and correct navigation lights.
Cruising range
The agreed cruising range is stated in the policy and can be extended at any time.
Weather
Check wind force in Beaufort and wind direction before casting off, and allow for gusts.
General guidance, not a complete account;
what governs are the rules of the waters you are on and the manual of your Kok Grundel.
Current wind force and direction for your waters are shown on the Home.
Series by Kok Grundel, build years and cover
Grundel Kotter is a motor yacht from Kok Grundel, built from 1976 to 1983.
Kok Grundel 900 is a motor yacht from Kok Grundel, built from 1971 to 1977.
For the Grundel Kotter and Kok Grundel 900 by Kok Grundel series there is no list price left.
That is why we work with an agreed value: you state the figure, we agree it,
and in a total loss exactly that amount is paid, with no deduction for wear.
For the Grundel Kotter, Kok Grundel 900 by Kok Grundel series:
On motor yachts the drive and the electronics together make up about half the value.
Both belong in the valuation, otherwise the sum insured is too low.
What does a used Kok Grundel cost?
We hold today’s price ranges by year for 1 models by Kok Grundel.
The table shows what boats in average condition are worth,
from the oldest to the youngest year on record.
Choose your exact model, year and condition in the calculator.
| Model | Years built | Range today |
|---|---|---|
| Grundel Kotter | 1979 | €41,700 to €53,100 |
Estimate from our boat records, October 2026.
Not a survey.
Kok Grundel insured in five minutes.
Boat type, year built, length and value of your Kok Grundel are all we need.
Work out the premium online or call us: +49 3375 29 12 77.
