May I refuse entry when a WOZ valuer visits?

You may refuse entry.

Why does GBLT send a valuer along?

Many details are already known to GBLT or visible to us on photos. We want to determine the WOZ value as accurately as possible. That is why it is sometimes useful for the valuer to have a look inside. The valuer needs to be able to prove his identity. He also has to justify why he wants to look inside. You must give permission for this.

The law says you are obliged to cooperate with the valuation. However, you are not required to let the valuer in.

What are the consequences if you do not let the valuer in?

In that case, the valuer will not be able to determine the value as accurately. It can also have consequences if you lodge an objection to the WOZ value.