May 12, 2026
Is Your Portsmouth Home Suitable for an Extension? 10 Checks to Do before Calling a Builder
Call Portsmouth Experts 023 9266 5966 Thinking about adding more space to your home? You are not alone then. Across Portsmouth, thousands of homeowners like you are weighing up whether…
Not always. Most single-storey rear extensions fall under permitted development, meaning no planning application is needed. The depth limits are 4 metres for detached houses and 3 metres for semi-detached and terraced homes. If your home is in a conservation area or your permitted development rights have been removed, a planning application is vital. Confirm your status with Portsmouth City Council before starting.
If you are building under permitted development rights, your neighbour has no legal power to stop the work. If you are going through a full planning application, your neighbour can submit a formal objection to Portsmouth City Council. But an objection alone does not automatically result in refusal. The council weighs all material planning considerations. Overlooking, loss of light, and overbearing impact are the factors that carry genuine weight, not personal preference.
Yes. Terraced houses are extended regularly across the city. Rear extensions and loft conversions both work well with the Victorian and Edwardian terraced housing stock that makes up a large proportion of Portsmouth’s residential streets. You will need a party wall agreement with neighbours on either side if the work involves shared walls or nearby excavation, but this is a standard process.
