We enjoyed our stay at Santo's place in the Hague.
Our primary goal was to find a pet friendly accommodation and were happy for that. We did find that staying on the top floor of a three story house to be less than optimal for a medium size dog.
The house is in a perfect location, seconds from the number 1 Tram or 22 Bus. We bought a 3 day pass which was good for either and took us to The train stations, into the Centre and to Delft. The beach is beautiful with beautiful wide promenades and is only a few minutes walk from the house.
While the main beach does not permit dogs on the sand between May and October, there is a great dog beach just past the pier and ferris wheel which allows dogs to run off leash. You can walk or take the tram.