For most homeowners, yes. There is no conservation area inside the village boundary. Only 26 buildings carry listed status, almost all of them Grade II. The dominant building era is the 1950s-to-1980s post-war run, which carries no heritage protection at all. Heritage rules barely touch most homes here.
The listed-building count for the area is 26. One is Grade II starred and the remaining 25 are Grade II. Listing means that changes to the building, internal and external, need listed-building consent on top of ordinary planning consent, which is the slow lane of the regime. Owners of listed homes tend to know they own one before they buy, and the constraints come with the building rather than with the village. There is also one scheduled monument within the area boundary, which is a designation that protects a specific historic site and its setting rather than the residential streets around it. The wider area carries more constraint than the village does, with conservation areas in Titchfield, Lee-on-the-Solent, Rowner and several Fareham streets, although Stubbington itself is the post-war village that those medieval cores never absorbed.
For almost every home in the village, which is to say everything outside the small listed list, the position is more straightforward. Most extensions, loft conversions, single-storey rear extensions and outbuildings fall inside the rules for permitted development, subject to the size and siting limits that apply nationally. Anything that breaks those limits, or any change of use, will need full planning consent through Fareham Borough Council. The absence of a conservation area inside the village removes a layer of friction that nearby places like Titchfield and Lee-on-the-Solent live with, and the absence in the figures of a tightened local rule means the standard national permitted-development regime applies rather than a stricter local version. Planning workload across the area runs at roughly 410 applications in the last twelve months, which is the volume of a village where households are actively extending themselves rather than holding still. The practical consequence is that altering a typical 1970s semi here is a process the council handles routinely rather than a fight, with the usual qualifications about boundary lines, party walls, neighbours' light and the standard limits on rear-extension depths handled at the design stage.
Freedom to extend is above average here, on the figures and in the lived experience. Buy a listed home and accept the conservation officer. Buy any other home and the only argument worth having is with your neighbours about the boundary fence.