This paper presents the initial findings of a study on the spatial modifications of fifty houses by homeowners in the Klang Valley area. Using a standardised format, various attributes consisting altered spaces and features were compiled and examined. It appears that certain features of the houses including kitchen, bedrooms and bathrooms were desperately altered. People have used their creativity in altering the spaces beyond the original intentions of the architect. To some extent, the findings indicate that the current model for providing houses has shortcomings in addressing the need to satisfy the aspirations of individual family to living. Keywords: modification, alteration, personalization, systematic observation, adaptation. © 2017 The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, UniversitiTeknologi MARA, Malaysia.