We made a reassessment of an anomalous feature challenging the Cosmological principle, called Hemispherical Power Asymmetry (HPA), seen in cosmic microwave background (CMB) temperature data from NASA’s WMAP first year observations that also persisted in the latest ESA’s Planck legacy data release (PR3). This study employs the Local Variance Estimator (LVE) method, a real (pixel) space method to probe any isotropy violating signals underlying CMB sky. First, the LVE method itself is re-validated comprehensively - some of the assumptions in the implementation of LVE method, its range of reliability in probing HPA signal in terms of disc radii choices, and its dependence on the strength of underlying anisotropic signal. With these insights, the LVE method is then applied to SEVEM cleaned CMB temperature map from Planck’s public release 4 (PR4) to find that HPA modeled as dipole modulation field of an otherwise isotropic CMB sky is still present when probed using a range of disc radii from \(r=1^\circ \) to \(90^\circ \) . Its significance is found to be at a \(\gtrsim 3\sigma \) in the range \(r= 4^{\circ }\) to \(14^{\circ }\) . We also confirm the scale dependence of the amplitude of dipole modulation field.