The mighty siddhas have said that just visualizing building a Siva Temple dispels the bad karma one has acquired in their previous hundred lives. The one who attempts to build a Siva Temple is absolved from any bad karma they may have incurred in their previous thousand lives. Last but not least, building a Shiva Temple relieves one from all previous karmas, including the Brahmahathi Dosha (the sin of killing a Brahmin).
Annai Siddha Rajakumar Guruji has renovated and consecrated/sanctified the Following Hindu Temples. (Consecration is usually done to purify the temple after a renovation or done to renew the purity of the temple after every 12 years.)