It is, after all, nonsense to try and hide or camouflage buildings in the countryside because the net result is to produce suburbia. There is an argument for the county hall being within the city of Northampton, but the county council decided it wanted it out in the country. The new county hall will stand alone, like Stonehenge for example. Such a man-made mark of grandeur and integrity in the countryside is not only acceptable, but also a splendid thing, to be admired in approach, to be enjoyed in proximity. All the tests show it will be a good object in the landscape.
Car parks are wastelands.
Therefore the raised spiral mound on which council staff will park their cars is a superbly arrogant idea which has every chance of coming off.