We establish the existence of a scaling limit Ep\mathcal {E}_p of discrete pp-energies on the graphs approximating a generalized Sierpiński carpet for p>dARCp > d_{\mathrm {ARC}}, where dARCd_{\mathrm {ARC}} is the Ahlfors regular conformal dimension of the underlying generalized Sierpiński carpet. Furthermore, the function space Fp\mathcal {F}_{p} defined as the collection of functions with finite pp-energies is shown to be a reflexive and separable Banach space that is dense in the set of continuous functions with respect to the supremum norm. In particular, (E2,F2)(\mathcal {E}_2, \mathcal {F}_2) recovers the canonical regular Dirichlet form constructed by Barlow and Bass [Ann. Inst. H. Poincaré Probab. Statist. 25 (1989), pp. 225–257] or Kusuoka and Zhou [Probab. Theory Related Fields 93 (1992), pp. 169–196]. We also provide Ep\mathcal {E}_{p}-energy measures associated with the constructed pp-energy and investigate its basic properties like self-similarity and chain rule.