Vamana Purana
On building a temple of Sri Madhava one can attain the eternal Vaikuntha-loka. One who offers a garden laden with fruits and flowers will attain heavenly pleasures.
Skanda Purana
Just by starting the construction of a temple for Lord Krishna, sins committed in seven births will be wiped out and one will deliver his forefathers who are suffering in the hellish planets.
Vamana Purana
Whoever constructs, or helps to construct, a Vishnu temple will protect eight generations of fathers, grandfathers and forefathers from falling into hell.
Vishnu Dharmottara Purana
A person who build a temple of Sri Vishnu will get the same results as performing the Rajasuya Yajna and Ashvamedha Yajna. O Best of the brahmanas, as many atoms are there in the temple so built, for so many thousands of years will he be able to reside in the heavenly planets.