Estoppel / Nuisance Per Se

Ultra vires acts or acts which are clearly beyond the scope of one's authority are null and void and cannot be given any effect. The doctrine of estoppel cannot operate to give effect to an act which is otherwise null and void or ultra vires.

We agree with petitioner's contention that, under Section 447(a)(3)(i) of R.A. No. 7160, otherwise known as the Local Government Code, the Sangguniang Panglungsod is empowered to enact ordinances declaring, preventing or abating noise and other forms of nuisance. It bears stressing, however, that the Sangguniang Bayan cannot declare a particular thing as a nuisance per se and order its condemnation. It does not have the power to find, as a fact, that a particular thing is a nuisance when such thing is not a nuisance per se; nor can it authorize the extrajudicial condemnation and destruction of that as a nuisance which in its nature, situation or use is not such. Those things must be determined and resolved in the ordinary courts of law. If a thing be in fact, a nuisance due to the manner of its operation, that question cannot be determined by a mere resolution of the Sangguniang Bayan (Gancayco v. City Government of Quezon City, G.R. No. 177807, October 11, 2011).